Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2012	Mar. 31, 2014	Dec. 31, 2012	Jun. 30, 2012
Debt Instrument [Line Items]
Provisions in future incremental borrowings		$ 150,000,000
Minimum percentage of senior secured term loan for interest rate protection		25.00%
Amount available for dividend payments under restrictive covenants		186,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Date of maturity		Apr. 27, 2016
Date of maturity		2013-01
Maximum borrowing capacity	25,000,000	10,000,000
Maximum borrowing capacity prior limit	30,000,000
Outstanding balance on the revolving credit facility		0
Revolving Credit Facility [Member] | Interest Rate Option, LIBOR Based [Member]
Debt Instrument [Line Items]
Interest rate		1.00%
Interest rate description		LIBOR (subject to a 1.00% floor) plus a margin of 4.50%
Interest rate, margin added		4.50%
Commitment fees on unused portion of facility		0.50%
Revolving Credit Facility [Member] | Interest Rate Option, Base Rate Based [Member]
Debt Instrument [Line Items]
Interest rate		2.00%
Interest rate description		Base Rate (subject to a 2.00% floor) plus a margin of 3.50%
Interest rate, margin added		3.50%
Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio		2.75
Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio		1.00
Default in payment of principal		10,000,000
7.375% Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior secured notes, aggregate principal amount issued	210,000,000
Debt instrument issuance	2012-04
Interest rate	7.375%			7.375%
Date of maturity			May 15, 2019
Date of maturity			2016-01
Senior secured term loan, outstanding amount (Jan 2016)	198,700,000
Interest payable periods			May 15 and November 15 of each year
Debt issuance costs		8,600,000
Percentage of principal amount, redemption price		107.375%
Repurchase of senior secured notes purchase price percentage		101.00%
7.375% Senior Secured Notes [Member] | Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Senior secured notes, aggregate principal amount issued	$ 265,000,000
7.375% Senior Secured Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount, maximum redeemable		35.00%
Percentage of principal amount redeemed at redemption date		105.53%
7.375% Senior Secured Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Minimum percentage of aggregate principal amount outstanding, excluding the redemption date		65.00%
Percentage of principal amount redeemed at redemption date		100.00%