Changes in Accrued Liability Associated with Restructuring Program (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Balance, beginning	$ 2,474	$ 2,760
Subsequent accruals	(1,937)	461
Cash payments	(241)	(848)
Foreign currency translation	81	101
Balance, ending	377	2,474
Termination Benefits
Restructuring Cost and Reserve [Line Items]
Balance, beginning	320	600
Subsequent accruals	20	(16)
Cash payments	(11)	(268)
Foreign currency translation	1	4
Balance, ending	330	320
Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Subsequent accruals	230	166
Cash payments	(230)	(166)
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Balance, beginning	2,133	2,138
Subsequent accruals	(2,166)	311
Cash payments		(414)
Foreign currency translation	80	98
Balance, ending	47	2,133
Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Balance, beginning	21	22
Subsequent accruals	(21)
Foreign currency translation		(1)
Balance, ending		$ 21