Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$ 2,104
2016	1,759
2017	1,262
2018	856
2019	700
Thereafter	2,640
Total minimum lease payments	9,321
Less: Amounts representing interest	(1,660)
Total obligation under capital leases	7,661
Less: Current portion of capital lease obligation	(1,706)		(1,240)
Long-term portion of capital lease obligation	5,955		6,011
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	17,593
2016	15,075
2017	11,393
2018	9,011
2019	7,959
Thereafter	18,162
Total minimum lease payments	$ 79,193	[1]

[1] Minimum operating lease payments have not been reduced by minimum sublease rentals of $1.0 million due in the future under noncancelable subleases.