Commitments and Contingencies Commitments and Contingencies (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016		$ 8,270
2017		6,772
2018		3,936
2019		2,636
2020		1,892
Thereafter		2,929
Total minimum lease payments		26,436
Less: Amounts representing interest		(2,589)
Total obligation under capital leases		23,847
Less: Current portion of capital lease obligation		(7,352)
Long-term portion of capital lease obligation		16,495	$ 7,274
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016		27,483
2017		22,771
2018		19,131
2019		16,397
2020		11,062
Thereafter		40,952
Total minimum lease payments	[1]	$ 137,796

[1] Minimum operating lease payments have not been reduced by minimum sublease rentals of $0.5 million due in the future under noncancelable subleases.