| **Pension Plans And Other Post-Retirement Benefits (Narrative) (Details) - USD ($) $ in Thousands** | 6 Months Ended | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Curtailment charge                                                                                  |           |            |   |   | $ 84 |
| Lump sum paid                                                                                       | $ 5,329        |            | $ 9,990 |   |   |
| Settlement loss                                                                                     |           |            | (2,895) |   |   |
| Aa-graded corporate bonds, outstanding value                                                        |           |            | $ 50,000 |   |   |
| Expected return on plan assets                                                                      |           |            | 7.25% |   |   |
| Pension Benefits [Member]                                                                           |           |            |   |   |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Lump sum paid                                                                                       |           |            | $ (302) | $ 302 |   |
| Settlement loss                                                                                     |           |            | $ (2,895) |   |   |
| Expected return on plan assets                                                                      |           |            | 7.25% | 7.50% | 7.50% |
| Fair value of plan assets                                                                           | 238,605        |            | $ 242,360 | $ 238,605 | $ 244,897 |
| 2015 expected contribution                                                                          |           |            | 15,421 |   |   |
| Other Postretirement Benefits [Member]                                                              |           |            |   |   |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Lump sum paid                                                                                       |           |            |  |  |   |
| Fair value of plan assets                                                                           | 43,704         |            | 46,085 | 43,704 | 43,326 |
| 401(k) Savings Plans [Member]                                                                       |           |            |   |   |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Matching contribution, annual profit sharing compensation expense                                   |           |            | 4,988 | 5,001 | $ 3,051 |
| Aqua America Common Stock [Member] | Pension Benefits [Member]                                      |           |            |   |   |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Fair value of plan assets                                                                           | $ 19,958       |            | $ 20,632 | $ 19,958 |   |
| Percentage of plan assets                                                                           | 8.40%          |            | 8.50% | 8.40% |   |
| Scenario, Forecast [Member]                                                                         |           |            |   |   |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                    |           |            |   |   |   |
| Expected return on plan assets                                                                      |           | 7.00%           |   |   |   |

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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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.
+ References
No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.
+ References
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| X                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aa-Graded Corporate Bonds Outstanding Value
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Defined Benefit Plan Fair Value Percentage Of Plan Assets
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No definition available.
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