Line of Credit and Term Loan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended			12 Months Ended
	Dec. 31, 2013 Term Loan Facility	Dec. 31, 2013 Term Loan Facility	May 23, 2013 JP Morgan Chase	Dec. 31, 2012 JP Morgan Chase	Dec. 31, 2013 Credit Agreement	Dec. 31, 2013 Credit Agreement Revolving Loans	Dec. 31, 2013 Credit Agreement Revolving Loans Eurodollar Rate Loans	Dec. 31, 2013 Credit Agreement Revolving Loans Base Rate Loan	Dec. 31, 2013 Credit Agreement Term Loan Facility	Dec. 31, 2013 Credit Agreement Term Loan Facility Eurodollar Rate Loans	Dec. 31, 2013 Credit Agreement Term Loan Facility Base Rate Loan	Dec. 31, 2013 Credit Agreement Revolving Credit Facilities	Dec. 31, 2013 Bank of America Credit Agreement	Dec. 31, 2013 Bank of America Credit Agreement Term Loan Facility	Dec. 31, 2013 Bank of America Credit Agreement Revolving Credit Facilities
Line of Credit Facility [Line Items]
Line of credits, maximum borrowings				$ 50.0
Adjusted LIBOR rate				1.71%			1.25%	0.25%		1.50%	0.50%
Line of credits, expiration date				Dec. 31, 2013
Long term line of credit with related party			50
Line of credit, total borrowings													150
Line of credit, maturity period														3 years	3 years
Line of credit, value														60	90
Line of credit, pledge equity interest													65.00%
Line of credit, interest rate description					The interest rates applicable to loans incurred under the Credit Agreement are (a) with respect to Revolving Loans, (i) the Eurodollar Rate plus 1.25% with respect to Eurodollar Loans and (ii) the Base Rate plus 0.25% with respect to Base Rate Loans, and (b) with respect to the Term Loan, (i) the Eurodollar Rate plus 1.50% with respect to Eurodollar Loans and (ii) the Base Rate plus 0.50% with respect to Base Rate Loans (each as defined in the Credit Agreement).
Line of credit, effective interest rate						1.4876%			1.7376%
Line of credit, principal payment	1.5	4.5
Line of credits, outstanding balance									$ 55.60			$ 90.14