Debt - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2014 Subsequent Event [Member] New term note [Member]	Dec. 31, 2013 Revolving credit facility [Member]	Dec. 31, 2013 Secured borrowings [Member]	Dec. 31, 2013 Junior subordinated notes [Member]	Aug. 31, 2013 Debenture [Member]	Mar. 31, 2013 Debenture [Member]	Dec. 31, 2013 Debenture [Member]
Debt Instrument [Line Items]
Rate of cash premium	10.00%					10.00%
Period of Line of Credit					30 days		90 days
Interest Rate of LIBOR					2.00%		3.25%
Debt instrument face amount	$ 109,397,000			$ 30,000,000				$ 8,500,000	$ 6,000,000
SBIC debenture interest rate								3.64%	2.35%
Annual fees								0.76%	0.515%
Debenture maturity period										10 years
Repayment of Debentures										4,200,000
Debenture's maturity date										Sep. 01, 2013
Revolving credit facility credit availability					40,000,000
Spread under prime interest rate on revolving credit facility					0.50%
Debt instrument, maturity period					Jun. 30, 2015
Minimum net worth					132,000,000
Percentage charged as unused fee					0.375%
Interest rate				2.50%
Decrease in credit availability				25,000,000
Interest Paid	$ 3,500,000	$ 3,495,000	$ 3,733,000