Office Closing and Exit Activities (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2010	Sep. 30, 2011	Dec. 31, 2010
Exit activities included in accrued liabilities in consolidated balance sheet
Beginning Balance	$ 1,568	$ 1,092	$ 1,568
Accrued one-time termination costs	5,100	0	5,138
Office lease		(117)	514
Payments		(852)	(6,128)
Ending Balance		$ 123	$ 1,092