Estimated Funded Status (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of period	$ 16,364	$ 26,515
Acquisitions		16
Service cost	89	1,268	1,654
Interest cost	163	290	319
Actuarial losses (gain)	367	(27)
Benefits paid	(3,329)	(2,596)
Curtailments		(4,675)
Settlements		(5,710)
Foreign exchange impact	(1,047)	1,283
Benefit obligation at end of period	12,607	16,364	26,515
Fair value of plan assets at beginning of period	357	6,040
Return on plan assets	4	(36)
Employer contributions	8	866
Benefits paid		(1,133)
Settlements		(5,511)
Foreign exchange impact	13	131
Fair value of plan assets at end of period	382	357	6,040
Plan assets less than benefit obligation - Net amount recognized	$ (12,225)	$ (16,007)