Income Taxes from Continuing - Income Tax Rate Reconciliation (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 Rate Reconciliation [Abstract]
Computed "expected" tax expense																			$ 81,255	$ 8,870	$ 29,013
Change in income taxes resulting from:
State income taxes, net of Federal income tax																			5,520	167	4,027
Foreign income tax expense (benefit)																			(1,130)	482	622
Deduction for domestic production activities																			(6,882)	(1,323)	(1,361)
R&D tax credits																			(677)	(508)	(1,652)
Nondeductible acquisition fees																			165	2,823
Other expense (benefit), net																			682	(673)	(116)
Valuation allowance change																			2,425	1,116
Income Tax Expense (Benefit)	$ 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