Commitments and Contingencies (Schedule of Lease Commitments) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Operating Leases
2016	$ 64,539
2017	52,243
2018	46,199
2019	43,119
2020	35,363
Thereafter	153,139
Total	394,602
Sublease Income
2016	272
2017	218
2018	204
2019	0
2020	0
Thereafter	0
Total	$ 694