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, Net	$ 60,129	$ 60,214	$ 58,188
Future minimum lease payments [Abstract]
2016	41,045
2017	37,961
2018	30,007
2019	23,278
2020	17,036
Thereafter	$ 20,335