Income Taxes Components of Provision for Income Taxes (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
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal									$ 56,064	$ 33,814	$ 24,607
Foreign									9,798	10,513	11,982
State and Local									14,795	10,114	7,541
Total Current									80,657	54,441	44,130
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal									(1,196)	15,104	5,992
Foreign									659	(3,080)	4,733
State and Local									(3,090)	2,291	8,834
Total Deferred									(3,627)	14,315	19,559
Total	$ 46,703	$ 7,392	$ 16,723	$ 6,212	$ 30,542	$ 15,264	$ 15,387	$ 7,563	$ 77,030	$ 68,756	$ 63,689