Commitments and Contingencies (Details) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended
	Feb. 25, 2011 agreement	Feb. 25, 2011	Dec. 31, 2012 majorfinancialinstitution	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Abstract]
Separate representation agreements	2
Amount of non-refundable retainer under representation agreements, to be paid	$ 100,000	$ 100,000
Potential number of warrants issued under representation agreements during 2013 and 2014		100,000
Rent expense under operating leases			2,500,000	2,200,000	2,000,000
Compensation expense related to 401(k) retirement plan			$ 300,000	$ 400,000
Matching 401(k) contribution			50.00%
Maximum percent of qualified compensation for matching 401(k) contributions			4.00%
Major financial institution			1