Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended		12 Months Ended
	Jul. 16, 2011	Nov. 30, 2010 sqft	Aug. 31, 2009 sqft	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments And Contingencies Disclosure [Abstract]
Lease expiration date				Mar. 31, 2020
Lease agreement for office			87,875
Lease agreement commenced				Feb. 28, 2010
Lease agreement period				10 years
Additional lease space agreement		8,400
Total rent expense under the Company's leases				$ 4,000,000	$ 4,000,000	$ 4,000,000
Reduction in letter of credit facility				1,000,000
Letter of credit extension period				Letter of credit extends annually through February 28, 2020 unless notification of termination is received.
Additional excise taxes on net worth related to TSC	198,000
Potential net worth tax exposure (liability)							$ 200,000
Lower income tax rate benefits available (minimum)				1.32%
Lower income tax rate benefits available (maximum)				9.50%
Tax benefits available on exemption from excise tax on net worth				0.26%