Accumulated Other Comprehensive Income (Loss) - Change in Accumulated Other Comprehensive Income (Loss) (AOCI) by Component, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
AOCI, balance as of December 31, 2012, Foreign Currency Translation			$ (5,760)
Other comprehensive income before reclassifications, Foreign Currency Translation	(1,384)	(852)	(639)	766
Amounts reclassified from AOCI, Foreign Currency Translation
Net other comprehensive income, Foreign Currency Translation			(639)
AOCI, balance as of June 30, 2013,Foreign Currency Translation	(6,399)		(6,399)
AOCI, balance as of December 31, 2012, Cash Flow Hedges			(713)
Unrealized interest rate swap adjustments	3,158	2,293	3,302	4,437
Amounts reclassified from AOCI, Cash Flow Hedges			141
Net other comprehensive income, Cash Flow Hedges			3,302
AOCI, balance as of June 30, 2013, Cash Flow Hedges	2,589		2,589
AOCI, balance as of December 31, 2012, Defined Benefit Pension Plans			(47,292)
Other comprehensive income before reclassifications, Defined Benefit Pension Plans
Amounts reclassified from AOCI, Defined Benefit Pension Plans			1,987
Net other comprehensive income, Defined Benefit Pension Plans	967		1,987
AOCI, balance as of June 30, 2013, Defined Benefit Pension Plans	(45,305)		(45,305)
AOCI, balance as of December 31, 2012			(53,765)
Other comprehensive income before reclassifications			2,522
Amounts reclassified from AOCI	967		2,128
Net other comprehensive income			4,650
AOCI, balance as of June 30, 2013	$ (49,115)		$ (49,115)