Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Apr. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ (4,961)
Provisions in future incremental borrowings		150,000
Amount available for dividend payments under restrictive covenants		186,000
Minimum percentage of senior secured term loan for interest rate protection		25.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Date of maturity		Apr. 27, 2016
Date of maturity		2013-01
Maximum borrowing capacity	25,000	10,000
Maximum borrowing capacity prior limit	30,000
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
7.375% Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior secured notes, aggregate principal amount issued	210,000
Debt instrument issuance	2012-04
Interest rate	7.375%			7.375%
Date of maturity			May 15, 2019
Loss on extinguishment of debt			4,961
Debt issuance costs		8,600
Percentage of principal amount, redemption price		107.375%
Repurchase of senior secured notes purchase price percentage		101.00%
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%
Senior Secured Term Loan [Member]
Debt Instrument [Line Items]
Date of maturity			2016-01
Senior secured term loan, outstanding amount (Jan 2016)	198,700
Interest payable periods			May 15 and November 15 of each year
Senior Secured Term Loan [Member] | Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Senior secured notes, aggregate principal amount issued	$ 265,000