Commitments and Contingencies (Operating Leases and Other Noncancelable Contractual Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Future Minimum Lease Payments
2017	$ 20,712
2018	18,000
2019	14,594
2020	11,362
2021	7,173
Thereafter	16,549
Total	88,390
Future sublease income	312
Total expense recorded under operating leases and other noncancelable contractual obligations	$ 20,400	$ 15,600	$ 12,400