Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (9,749)	$ (5,024)	$ (3,429)
Other comprehensive income (loss)	2,686	(6,973)	(1,901)
Amounts reclassified from other comprehensive income	721	2,248	306
Ending Balance	(6,342)	(9,749)	(5,024)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,299	2,809	2,568
Other comprehensive income (loss)	54	(3,020)	241
Amounts reclassified from other comprehensive income		1,510
Ending Balance	1,353	1,299	2,809
Pension liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(11,048)	(7,833)	(5,997)
Other comprehensive income (loss)	2,632	(3,953)	(2,142)
Amounts reclassified from other comprehensive income	721	738	306
Ending Balance	$ (7,695)	$ (11,048)	$ (7,833)