Estimated Funded Status (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 8,482	$ 9,855
Service cost	65	64	$ 98
Interest cost	119	111	122
Actuarial losses (gain)	15	336
Benefits paid	(1,165)	(922)
Curtailments	(536)	0
Other	1,412	0
Foreign exchange impact	(198)	(962)
Benefit obligation at end of year	8,194	8,482	9,855
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	380	384
Return on plan assets	19	9
Employer contributions	14	9
Defined Benefit Plan, Business Combinations and Acquisitions, Plan Assets	331	0
Foreign exchange impact	(26)	(22)
Fair value of plan assets at end of year	718	380	$ 384
Plan assets less than benefit obligation - Net amount recognized	$ (7,476)	$ (8,102)