Revolving Line of Credit and Term Loan - Additional Information (Detail) (USD $)				9 Months Ended	0 Months Ended		9 Months Ended	0 Months Ended			0 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2014	Apr. 01, 2014	Dec. 31, 2013	Sep. 30, 2014 Term Loan B Debt [Member]	Apr. 01, 2014 Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Wells Fargo Bank, N.A [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member]	Apr. 01, 2014 Minimum [Member] Wells Fargo Bank, N.A [Member]	Jun. 28, 2013 Minimum [Member] Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Minimum [Member] Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Maximum [Member] Wells Fargo Bank, N.A [Member]	Jun. 28, 2013 Maximum [Member] Wells Fargo Bank, N.A [Member]	Sep. 30, 2014 Maximum [Member] Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Maximum [Member] Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Amended Wells Credit Agreement I [Member]	Sep. 30, 2014 Amended Wells Credit Agreement I [Member]	Apr. 01, 2014 Amended Wells Credit Agreement I [Member] Term Loan B Debt [Member]	Sep. 30, 2014 Amended Wells Credit Agreement I [Member] Minimum [Member]	Apr. 01, 2014 Amended Wells Credit Agreement I [Member] Minimum [Member] Wells Fargo Bank, N.A [Member]	Apr. 01, 2014 Amended Wells Credit Agreement I [Member] Maximum [Member] Wells Fargo Bank, N.A [Member]
Line of Credit Facility [Line Items]
Agreement provides for borrowings under a revolving line of credit	$ 100,000,000	$ 90,000,000							$ 75,000,000	$ 75,000,000		$ 100,000,000		$ 90,000,000					$ 75,000,000	$ 90,000,000
Applicable margin, during the period								0.00%	0.00%		0.50%	0.50%
Line of credit, interest at LIBOR				4.66%			450.00%	1.50%	1.50%		2.00%	2.00%			4.50%	0.16%
Percentage of revolving unused line fee					0.25%							0.25%
Consecutive days of liquidity threshold													60 days
Liquidity threshold												9,375,000
Percent of total credit facility												12.50%
Line of credit facility covenants minimum fixed charge coverage ratio									1.0									1.20
Long term borrowings						5,000,000											5,000,000
Amortization period																36 months
Line of credit facility covenants maximum debt leverage ratio																4.0
Line of credit, LIBOR				LIBOR plus 4.50%											LIBOR plus 4.5%
Outstanding borrowings under its revolving line of credit	74,000,000		9,000,000	4,400,000
Line of Credit bears interest at BMO Bank's LIBOR rate	1.66%		1.67%
Remaining outstanding balance	48,000		8,900,000
Percentage of applicable margin interest rate	3.25%		3.25%
Unused and available line of credit balance	$ 25,400,000		$ 47,900,000