Income Taxes Income Taxes Details 2 (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Current: United States									$ 51,664	$ 18,138	$ 154,128
Current: Foreign									7,059	10,541	12,187
Current: State									12,908	6,974	4,934
Total current income taxes									71,631	35,653	171,249
Deferred: United States									12,973	(48,565)	(314,389)
Deferred: Foreign									(571)	386	618
Deferred: State									10,628	6,700	(4,067)
Provision for deferred income taxes									23,030	(41,479)	(317,838)
Provision for income taxes	$ (47,999)	$ (1,997)	$ (23,570)	$ (21,095)	$ 67,224	$ (17,043)	$ (16,034)	$ (28,321)	94,661	(5,826)	(146,589)
Income Taxes Paid									70,600	65,400	170,200
Proceeds from Income Tax Refunds									$ 4,700	$ 11,400	$ 3,400