Income Taxes from Continuing Operations - Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended												6 Months Ended			9 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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Provision [Abstract]
Federal Current																			$ 116,375	$ 26,114	$ 27,985
Federal Deferred																			(41,477)	(14,222)	(3,050)
Federal Total																			74,898	11,892	24,935
State Current																			11,113	2,347	4,145
State Deferred																			(2,620)	(2,090)	2,051
State Total																			8,493	257	6,196
Foreign Current																				4
Foreign Deferred																			(2,033)	(1,199)	(598)
Foreign Total																			(2,033)	(1,195)	(598)
Total Current																			127,488	28,465	32,130
Total Deferred																			(46,130)	(17,511)	(1,597)
Total	$ 16,670	$ 26,048	$ 17,850	$ 20,790	$ 15,266	$ (11,914)	$ (499)	$ 8,101	$ 9,996	$ 7,777	$ 7,345	$ 5,415	$ 38,640	$ 7,602	$ 12,760	$ 64,688	$ (4,312)	$ 20,537	$ 81,358	$ 10,954	$ 30,533