Employee Benefit Plans - Funded Status of Defined Benefit Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Noncurrent pension asset	$ 1,303
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of the year	61,225	$ 54,658
Interest cost	2,376	2,538	$ 2,161
Participant contributions	8	9
Actuarial losses (gains)	(2,579)	8,585
Change in currency exchange rates	(471)	(669)
Benefits paid	(3,473)	(3,896)
Benefit obligations at end of the year	57,086	61,225	54,658
Fair value at beginning of the year	48,816	49,402
Actual return on plan assets	(1,572)	2,404
Employer contributions	800	1,553
Change in currency exchange rates	(512)	(656)
Fair value of plan assets at end of year	44,067	48,816	49,402
Funded status	(13,019)	(12,409)
Noncurrent pension asset	1,303
Current	(167)	(167)
Noncurrent	(14,155)	(12,242)
Amounts recognized in the Consolidated Balance Sheets	(13,019)	(12,409)
Accumulated other comprehensive loss - actuarial losses, net	34,139	33,135
Total	21,120	20,726
Accumulated benefit obligations (ABO)	57,086	61,225
OPEB
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of the year	3,882	3,864
Interest cost	108	114	105
Actuarial losses (gains)	(336)	385
Benefits paid	(416)	(481)
Benefit obligations at end of the year	3,238	3,882	$ 3,864
Funded status	(3,238)	(3,882)
Current	(465)	(541)
Noncurrent	(2,773)	(3,341)
Amounts recognized in the Consolidated Balance Sheets	(3,238)	(3,882)
Accumulated other comprehensive loss - actuarial losses, net	790	1,025
Prior service credit	(541)	(1,162)
Accumulated other comprehensive income (loss)	$ 249	$ (137)