Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2013 |
|
Income Tax Disclosure [Abstract] | |||||||||||
United States | $ 530,684 | $ 492,577 | $ 431,833 | ||||||||
International | 30,660 | 4,765 | 6,259 | ||||||||
Income before income taxes | $ 149,464 | $ 140,850 | $ 136,121 | $ 134,909 | $ 149,804 | $ 127,272 | $ 110,887 | $ 109,379 | $ 561,344 | $ 497,342 | $ 438,092 |