Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current, Federal	$ 363,803	$ 394,904	$ 281,938
Current, State	37,811	30,997	23,701
Current, Foreign	12,826	20,429	22,093
Total Current	414,440	446,330	327,732
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred, Federal	(15,474)	(5,743)	51,509
Deferred, State	(2,264)	(3,155)	(1,471)
Deferred, Foreign	1,254	1,277	2,542
Total, Deferred	(16,484)	(7,621)	52,580
Total Current and Deferred	$ 397,956	$ 438,709	$ 380,312