Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases [Abstract]
Rent expense	$ 14,500	$ 15,400	$ 14,500
Future minimum rental commitments for all non-cancellable operating leases
2016	11,565
2017	10,676
2018	7,686
2019	5,343
2020	3,121
Thereafter	4,630
Total	43,021
Capital lease obligations
Current portion of capital leases	132	134
Long-term portion of capital leases	204	185
Total capital lease obligation	336	$ 319
Future minimum lease payments for all capital leases
2016	132
2017	100
2018	58
2019	32
2020	14
Thereafter	0
Total	$ 336