Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 46,000	$ 49,000	$ 43,000
Operating Leases, Future Minimum Payments Due, Next Twelve Months	40,900
Operating Leases, Future Minimum Payments, Due in Two Years	37,109
Operating Leases, Future Minimum Payments, Due in Three Years	31,612
Operating Leases, Future Minimum Payments, Due in Four Years	25,962
Operating Leases, Future Minimum Payments, Due in Five Years	21,283
Operating Leases, Future Minimum Payments, Due Thereafter	38,406
Operating Leases, Future Minimum Payments Due	$ 195,272