Commitments and Contingencies (Commitments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Office Leases
2014	$ 7,947,000
2015	6,185,000
2016	5,277,000
2017	3,625,000
2018	2,722,000
Thereafter	19,114,000
Total minimum payments	44,870,000
Rent expense	8,300,000	9,100,000	9,200,000
Sublease income	800,000	1,000,000	1,000,000
Accrued Loss on Excess Office Facilities
Office Leases
Total minimum payments	$ 300,000