| **Consolidated Statements Of Capitalization (USD $)In Thousands, unless otherwise specified** | Dec. 31, 2014                                                                                                                                 | Dec. 31, 2013                                                                                                                                 |
|-----------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| **Aqua America stockholders' equity:**                                                        |                                                                                                                                          |                                                                                                                                          |
| Common stock, $.50 par value                                                                  | $ 89,296us-gaap_CommonStockValue                                                                                                              | $ 88,964us-gaap_CommonStockValue                                                                                                              |
| Capital in excess of par value                                                                | 758,145us-gaap_AdditionalPaidInCapitalCommonStock                                                                                             | 743,335us-gaap_AdditionalPaidInCapitalCommonStock                                                                                             |
| Retained earnings                                                                             | 849,952us-gaap_RetainedEarningsAccumulatedDeficit                                                                                             | 729,272us-gaap_RetainedEarningsAccumulatedDeficit                                                                                             |
| Treasury stock, at cost                                                                       | (42,838)us-gaap_TreasuryStockValue                                                                                                            | (27,082)us-gaap_TreasuryStockValue                                                                                                            |
| Accumulated other comprehensive income                                                        | 788us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax                                                                                    | 346us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax                                                                                    |
| Total Aqua America stockholders' equity                                                       | 1,655,343us-gaap_StockholdersEquity                                                                                                           | 1,534,835us-gaap_StockholdersEquity                                                                                                           |
| Noncontrolling interest                                                                       | 40us-gaap_MinorityInterest                                                                                                                    | 208us-gaap_MinorityInterest                                                                                                                   |
| Total equity                                                                                  | 1,655,383us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest                                                       | 1,535,043us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest                                                       |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Long-term debt of subsidiaries                                                                | 1,115,322us-gaap_LongTermDebt                                                                                                                 | 1,101,339us-gaap_LongTermDebt                                                                                                                 |
| Notes payable to bank under revolving credit agreement, variable rate, due 2017               | 72,000us-gaap_OtherLongTermNotesPayable                                                                                                       |                                                                                                                                          |
| Total long-term debt                                                                          | 1,619,270us-gaap_LongTermDebtAndCapitalLeaseObligations                                                                                       | 1,554,871us-gaap_LongTermDebtAndCapitalLeaseObligations                                                                                       |
| Current portion of long-term debt                                                             | 58,615us-gaap_LongTermDebtCurrent                                                                                                             | 86,288us-gaap_LongTermDebtCurrent                                                                                                             |
| Long-term debt, excluding current portion                                                     | 1,560,655us-gaap_LongTermDebtNoncurrent                                                                                                       | 1,468,583us-gaap_LongTermDebtNoncurrent                                                                                                       |
| Total capitalization                                                                          | 3,216,038us-gaap_CapitalizationLongtermDebtAndEquity                                                                                          | 3,003,626us-gaap_CapitalizationLongtermDebtAndEquity                                                                                          |
| Long Term Debt of Subsidiaries 0.00% to .99% [Member]                                         |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 5,653us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesOneMember                                | 5,035us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesOneMember                                |
| Long Term Debt of Subsidiaries 1.00% to 1.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 24,871us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesTwoMember                               | 28,615us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesTwoMember                               |
| Long Term Debt of Subsidiaries 2.00% to 2.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 15,578us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesThreeMember                             | 14,903us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesThreeMember                             |
| Long Term Debt of Subsidiaries 3.00% to 3.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 190,875us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesFourMember                             | 167,365us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesFourMember                             |
| Long Term Debt of Subsidiaries 4.00% to 4.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 484,168us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesFiveMember                             | 447,297us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesFiveMember                             |
| Long Term Debt of Subsidiaries 5.00% to 5.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 242,102us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesSixMember                              | 284,362us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesSixMember                              |
| Long Term Debt of Subsidiaries 6.00% to 6.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 64,944us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesSevenMember                             | 64,923us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesSevenMember                             |
| Long Term Debt of Subsidiaries 7.00% to 7.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 34,424us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesEightMember                             | 35,056us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesEightMember                             |
| Long Term Debt of Subsidiaries 8.00% to 8.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 18,907us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesNineMember                              | 19,283us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesNineMember                              |
| Long Term Debt of Subsidiaries 9.00% to 9.99% [Member]                                        |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 27,800us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesTenMember                               | 28,500us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesTenMember                               |
| Long-Term Debt Of Subsidiaries 10.00% To 10.99% [Member]                                      |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Debt instrument principal outstanding                                                         | 6,000us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesElevenMember                             | 6,000us-gaap_DebtInstrumentCarryingAmount/ us-gaap_DebtInstrumentAxis= wtr_LongTermDebtOfSubsidiariesElevenMember                             |
| Bank Note at One 1.921% due 2017 [Member]                                                     |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Unsecured notes payable                                                                       | 50,000us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_BankNoteAtOnePointNineTwoOnePercentMember                                        |                                                                                                                                          |
| Notes at 3.57% due 2027 [Member]                                                              |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Unsecured notes payable                                                                       | 50,000us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesAtThreePointFiveSevenPercentMember                                          | 50,000us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesAtThreePointFiveSevenPercentMember                                          |
| Notes Ranging From 4.62% To 4.87% [Member]                                                    |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Unsecured notes payable                                                                       | 144,400us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesRangingFromFourPointSixTwoPercentageToFourPointEightSevenPercentageMember  | 171,400us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesRangingFromFourPointSixTwoPercentageToFourPointEightSevenPercentageMember  |
| Notes Ranging From 5.01% To 5.95% [Member]                                                    |                                                                                                                                          |                                                                                                                                          |
| **Long-term debt:**                                                                           |                                                                                                                                          |                                                                                                                                          |
| Unsecured notes payable                                                                       | $ 187,548us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesRangingFromFivePointZeroOnePercentageToFivePointNineFivePercentageMember | $ 232,132us-gaap_UnsecuredDebt/ us-gaap_DebtInstrumentAxis= wtr_NotesRangingFromFivePointZeroOnePercentageToFivePointNineFivePercentageMember |

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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.
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| - Definition
Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.
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| - Definition
This element represents the total consolidated (as applicable) capitalization of the entity which is comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument.
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No definition available.
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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.
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| - Definition
Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.
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| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
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| - Definition
Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.
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| - Definition
Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
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| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).
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| - Definition
Carrying value of the noncurrent portion of notes payable which were initially due after one year or beyond the normal operating cycle, if longer, and which are not otherwise defined in the taxonomy.
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| - Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
+ References
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| - Definition
Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.
+ References
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| - Definition
The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.
+ References
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| - Definition
Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).
+ References
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