Accumulated Other Comprehensive Loss - Summary of Activity in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 19, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, December 31, 2012				$ (9,239)
Other comprehensive income before reclassifications				790
Reclassifications from accumulated comprehensive loss to net income	707	707		1,507
Total other comprehensive income (loss)			302	2,297	(983)
Balance, September 30, 2013		(6,942)		(6,942)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, December 31, 2012				(3,491)
Reclassifications from accumulated comprehensive loss to net income				360
Total other comprehensive income (loss)				360
Balance, September 30, 2013		(3,131)		(3,131)
Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, December 31, 2012				(5,748)
Other comprehensive income before reclassifications				790
Reclassifications from accumulated comprehensive loss to net income				1,147
Total other comprehensive income (loss)				1,937
Balance, September 30, 2013		$ (3,811)		$ (3,811)