Components of Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2012	$ (53,564)
Other comprehensive income before reclassifications	(26,731)
Amounts reclassified from accumulated other comprehensive income	991
Net current period other comprehensive income	(25,740)	11,225
Balance at March 31, 2013	(79,304)
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2012	11,981
Other comprehensive income before reclassifications	(27,941)
Net current period other comprehensive income	(27,941)
Balance at March 31, 2013	(15,960)
Interest Rate Swap Contracts
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2012	(2,459)
Other comprehensive income before reclassifications	(32)
Net current period other comprehensive income	(32)
Balance at March 31, 2013	(2,491)
Pension And Post Retirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2012	(63,086)
Other comprehensive income before reclassifications	1,242
Amounts reclassified from accumulated other comprehensive income	991
Net current period other comprehensive income	2,233
Balance at March 31, 2013	$ (60,853)