Employee Benefit Plans - Change in Projected Benefit Obligation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 4,949	$ 3,758
Service cost	119	83	84
Interest cost	161	175	183
Actuarial (gain) loss	(238)	926
Benefits paid	(91)	(79)
Foreign currency exchange rate changes	222	86
Projected benefit obligation at end of year	5,122	4,949	3,758
Accumulated benefit obligation	4,978	4,796
Funded status at end of year	$ (5,122)	$ (4,949)