| **Net Income Per Common Share Net Income per Common Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands** |                |                |          | 3 Months Ended | 9 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|----------|----------------|----------------|
||
| Anti-dilutive securities (in shares)                                                                                            |           |           |     | 24,000         | 15,000         | 13,000 | 5,000 |
| Cash dividends declared per share                                                                                               |           |           |     | $ 0.8100       | $ 0.6225       | $ 2.0550 | $ 1.4525 |
| Payments of Dividends                                                                                                           |           |           |     | $ 29,300       | $ 22,600       | $ 74,530 | $ 52,778 |
| Scenario, Forecast [Member]                                                                                                     |           |           |     |           |           |   |   |
| Cash dividends declared per share                                                                                               |           |           | $ 0.8100 |           |           |   |   |
| Dividends Payable, Date to be Paid                                                                                              | Jul. 13,  2016 |           |     |           |           |   |   |
| Dividends Payable, Date of Record                                                                                               |           | Jun. 28,  2016 |     |           |           |   |   |

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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregate dividends declared during the period for each share of common stock outstanding.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Date the declared dividend will be paid, in CCYY-MM-DD format.
+ References
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| X                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.
+ References
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| X                                                                                                                                                    |
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