Income Taxes Income Taxes Details 2 (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Current: United States									$ 94,502	$ 67,511	$ 2,207
Current: Foreign									9,270	10,859	12,445
Current: State									13,207	17,939	6,664
Total current income taxes									116,979	96,309	21,316
Deferred: United States									15,918	108,514	64,355
Deferred: Foreign									(878)	(653)	58
Deferred: State									3,008	21,810	7,295
Provision for deferred income taxes									18,048	129,671	71,708
Provision for income taxes	$ (41,249)	$ (26,118)	$ (31,007)	$ (36,653)	$ (90,982)	$ (74,934)	$ (37,357)	$ (22,707)	135,027	225,980	93,024
Income Taxes Paid									105,400	106,300	26,000
Proceeds from Income Tax Refunds									$ 1,900	$ 600	$ 500