Leases (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Leases
Rent expense	$ 14,500,000	$ 14,900,000	$ 17,600,000
Future minimum rental commitments for all non-cancellable operating leases
2014	13,513,000
2015	8,873,000
2016	5,655,000
2017	4,452,000
2018	3,220,000
Thereafter	3,209,000
Total	38,922,000
Capital lease obligations
Current portion of capital leases	257,000	369,000
Long-term portion of capital leases	204,000	302,000
Total capital lease obligations	461,000	671,000
Future minimum lease payments for all capital leases
2014	257,000
2015	97,000
2016	61,000
2017	32,000
2018	14,000
Thereafter	0
Total	$ 461,000