Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leases
2014	$ 6,462,000
2015	5,627,000
2016	3,442,000
2017	1,529,000
2018	914,000
Thereafter	536,000
Total future minimum lease obligations	18,510,000
Capital Leases
2014	469,000
Total future minimum lease obligations	469,000
Less: amount representing interest	(10,000)
Present value of minimum lease obligations	459,000
Rent expense, included in general and administrative expense
Rent expense	$ 5,600,000	$ 5,000,000	$ 3,600,000