Commitments and Contingencies - Future Lease Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leased Assets [Line Items]
2016	$ 123,503
2017	55,377
2018	23,860
2019	15,313
2020	13,754
Thereafter	86,384
Total Lease Commitments	318,191
Operating Leases, Rent Expense, Net	$ 229,000	$ 257,000	$ 191,000