| **Consolidated Balance Sheets (USD $)In Thousands, unless otherwise specified**                                                              | Mar. 31, 2014 | Dec. 31, 2013 |
|----------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Assets**                                                                                                                                   |          |          |
| Property, plant and equipment, at cost                                                                                                       | $ 5,397,141   | $ 5,348,195   |
| Less: accumulated depreciation                                                                                                               | 1,237,686     | 1,211,806     |
| Net property, plant and equipment                                                                                                            | 4,159,455     | 4,136,389     |
| **Current assets:**                                                                                                                          |          |          |
| Cash and cash equivalents                                                                                                                    | 17,508        | 5,058         |
| Accounts receivable and unbilled revenues, net                                                                                               | 89,892        | 94,704        |
| Income tax receivable                                                                                                                        | 1,211         | 7,873         |
| Deferred income taxes                                                                                                                        | 49,846        | 40,038        |
| Inventory, materials and supplies                                                                                                            | 11,794        | 11,353        |
| Prepayments and other current assets                                                                                                         | 11,129        | 11,081        |
| Assets of discontinued operations held for sale                                                                                              | 32,250        | 32,926        |
| Total current assets                                                                                                                         | 213,630       | 203,033       |
| Regulatory assets                                                                                                                            | 599,717       | 585,140       |
| Deferred charges and other assets, net                                                                                                       | 51,253        | 50,290        |
| Investment in joint venture                                                                                                                  | 47,666        | 48,695        |
| Funds restricted for construction activity                                                                                                   | 47            | 47            |
| Goodwill                                                                                                                                     | 27,999        | 28,223        |
| Total assets                                                                                                                                 | 5,099,767     | 5,051,817     |
| **Aqua America stockholders' equity:**                                                                                                       |          |          |
| Common stock at $.50 par value, authorized 300,000,000 shares, issued 178,316,578 and 177,928,922 as of March 31, 2014 and December 31, 2013 | 89,158        | 88,964        |
| Capital in excess of par value                                                                                                               | 748,080       | 743,335       |
| Retained earnings                                                                                                                            | 745,161       | 729,272       |
| Treasury stock, at cost, 1,258 279 and 1,178,323 shares in March 31, 2014 and December 31, 2013                                              | (29,055)      | (27,082)      |
| Accumulated other comprehensive income                                                                                                       | 667           | 346           |
| Total Aqua America stockholders' equity                                                                                                      | 1,554,011     | 1,534,835     |
| Noncontrolling interest                                                                                                                      | 223           | 208           |
| Total equity                                                                                                                                 | 1,554,234     | 1,535,043     |
| Long-term debt, excluding current portion                                                                                                    | 1,498,040     | 1,468,583     |
| Commitments and contingencies (See Note 13)                                                                                                  |     |     |
| **Current liabilities:**                                                                                                                     |          |          |
| Current portion of long-term debt                                                                                                            | 97,789        | 86,288        |
| Loans payable                                                                                                                                | 27,913        | 36,740        |
| Accounts payable                                                                                                                             | 31,547        | 65,815        |
| Accrued interest                                                                                                                             | 21,175        | 13,615        |
| Accrued taxes                                                                                                                                | 13,362        | 14,176        |
| Other accrued liabilities                                                                                                                    | 30,419        | 33,596        |
| Liabilities of discontinued operations held for sale                                                                                         | 29,037        | 29,649        |
| Total current liabilities                                                                                                                    | 251,242       | 279,879       |
| **Deferred credits and other liabilities:**                                                                                                  |          |          |
| Deferred income taxes and investment tax credits                                                                                             | 901,391       | 866,211       |
| Customers' advances for construction                                                                                                         | 73,728        | 73,892        |
| Regulatory liabilities                                                                                                                       | 278,283       | 281,014       |
| Other                                                                                                                                        | 75,230        | 81,552        |
| Total deferred credits and other liabilities                                                                                                 | 1,328,632     | 1,302,669     |
| Contributions in aid of construction                                                                                                         | 467,619       | 465,643       |
| Total liabilities and stockholders' equity                                                                                                   | $ 5,099,767   | $ 5,051,817   |

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.
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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.
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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.
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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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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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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
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Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
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The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for current assets (assets with expected useful life shorter than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date.
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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.
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Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.
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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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Developers, builders, governmental agencies and municipalities will provide the entity with cash, or in some cases property, to extend its services to their properties. Nonrefundable contributions are recorded as contributions in aid of construction ("CIAC").
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For utilities only, represents the carrying amount of the liability as of the balance sheet date for payments received by a utility from its customers in advance of performing its obligations under terms of its construction agreements.
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Aggregate carrying amount of deferred costs and other assets not separately disclosed.
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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).
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| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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| - Definition
Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.
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| - Definition
Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
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| - Definition
Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.
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| - Definition
Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.
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| - Definition
Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.
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| - Definition
Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.
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| - Definition
Amount of obligation due after one year or beyond the normal operating cycle, if longer.
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| - Definition
Carrying value as of the balance sheet date of current obligations (due less than one year or one operating cycle, if longer) arising from the sale, disposal or planned sale in the near future (generally within one year) of a disposal group, including a component of the entity (discontinued operation).
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| - Definition
Carrying value as of the balance sheet date of portion of long-term loans payable due within one year or the 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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| - Definition
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
Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).
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| - Definition
Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.
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| - Definition
Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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| - Definition
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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| - Definition
Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.
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The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.
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| - Definition
Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.
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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
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section EReference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5
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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 of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
+ 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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