| **Schedule 1 - Condensed Parent Company Financial Statements (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands** | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Condensed Cash Flow Statements, Captions [Line Items]**                                                                              |            |   |   |   |   |
| Net cash flows from operating activities                                                                                               | $ 395,788       | $ 370,794 | $ 363,788 |   |   |
| Property, plant and equipment additions                                                                                                | (382,996)       | (364,689) | (328,605) | $ (307,908) | $ (347,098) |
| Acquisitions of utility systems and other, net                                                                                         | (9,423)         | (28,989) | (14,616) |   |   |
| Net proceeds from the sale of utility system and other assets                                                                          | 7,746           | 648 | 558 |   |   |
| Other                                                                                                                                  | 1,464           | (1,079) | 279 |   |   |
| Net cash flows used in investing activities                                                                                            | (383,209)       | (394,062) | (292,501) |   |   |
| Net repayments of short-term debt                                                                                                      | (10,186)        | (1,677) | (18,342) |   |   |
| Proceeds from long-term debt                                                                                                           | 503,586         | 560,544 | 317,699 |   |   |
| Repayments of long-term debt                                                                                                           | (373,087)       | (400,407) | (253,192) |   |   |
| Change in cash overdraft position                                                                                                      | (8,076)         | (739) | (322) |   |   |
| Proceeds from issuing common stock                                                                                                     | 1,388           | 677 |   |   |   |
| Proceeds from exercised stock options                                                                                                  | 4,260           | 7,540 | 7,296 |   |   |
| Share-based compensation windfall tax benefits                                                                                         | 1,332           | 1,842 | 1,422 |   |   |
| Repurchase of common stock                                                                                                             | (3,028)         | (25,247) | (15,756) |   |   |
| Dividends paid on common stock                                                                                                         | (130,923)       | (121,248) | (112,106) | (102,889) | $ (93,423) |
| Other                                                                                                                                  | (811)           | (853) | (793) |   |   |
| Net cash flows (used in) from financing activities                                                                                     | (12,045)        | 22,359 | (72,207) |   |   |
| Net increase (decrease) in cash and cash equivalents                                                                                   | 534             | (909) | (920) |   |   |
| Cash and cash equivalents at beginning of year                                                                                         | 3,229           | 4,138 | 5,058 |   |   |
| Cash and cash equivalents at end of year                                                                                               | 3,763           | 3,229 | 4,138 | 5,058 |   |
| Aqua America, Inc. [Member]                                                                                                            |            |   |   |   |   |
| **Condensed Cash Flow Statements, Captions [Line Items]**                                                                              |            |   |   |   |   |
| Net cash flows from operating activities                                                                                               | 84,649          | 152,916 | 114,465 |   |   |
| Acquisitions of utility systems and other, net                                                                                         | (3,713)         | (26,722) | (9,329) |   |   |
| Net proceeds from the sale of utility system and other assets                                                                          | 205             |  |  |   |   |
| Decrease (increase) in investment of subsidiary                                                                                        | (26,470)        | (27,596) | 744 |   |   |
| Other                                                                                                                                  | 204             | (1,031) | (733) |   |   |
| Net cash flows used in investing activities                                                                                            | (29,774)        | (55,349) | (9,318) |   |   |
| Proceeds from long-term debt                                                                                                           | 418,957         | 298,879 | 170,790 |   |   |
| Repayments of long-term debt                                                                                                           | (346,050)       | (259,158) | (156,000) |   |   |
| Proceeds from issuing common stock                                                                                                     | 1,388           | 677 |  |   |   |
| Proceeds from exercised stock options                                                                                                  | 4,260           | 7,540 | 7,296 |   |   |
| Share-based compensation windfall tax benefits                                                                                         | 1,332           | 1,843 | 1,422 |   |   |
| Repurchase of common stock                                                                                                             | (3,028)         | (25,247) | (15,756) |   |   |
| Dividends paid on common stock                                                                                                         | (130,923)       | (121,248) | (112,106) |   |   |
| Other                                                                                                                                  | (811)           | (853) | (793) |   |   |
| Net cash flows (used in) from financing activities                                                                                     | (54,875)        | (97,567) | (105,147) |   |   |
| Net increase (decrease) in cash and cash equivalents                                                                                   |                 |  |  |   |   |
| Cash and cash equivalents at beginning of year                                                                                         |                 |  |  |   |   |
| Cash and cash equivalents at end of year                                                                                               |                 |  |  |  |   |

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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the 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. Includes effect from exchange rate changes.
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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| - Definition
Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
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| - Definition
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash (inflow) outflow from investing activities classified as other.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow to reacquire common stock during the period.
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| - Definition
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.
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| - Definition
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
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| - Definition
The cash outflow for the purchase of waste water systems which includes the waste treatment and disposal facility and equipment to households and industry.
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| - Definition
The cash inflow from the additional capital contribution to the entity.
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| - Definition
The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from financing activities classified as other.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.
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| - Definition
The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.
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| - Definition
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.
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| - Definition
(Increase) decrease in investment of subsidiary.
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No definition available.
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| - Definition
Proceeds from sale of utility system and other
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