Employee Benefit Plans - Funded Status of Defined Benefit Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Noncurrent pension asset	$ 1,037	$ 1,303
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of the year	57,086	61,225
Interest cost	2,302	2,376	$ 2,538
Participant contributions	6	8
Actuarial losses (gains)	292	(2,579)
Change in currency exchange rates	(1,804)	(471)
Benefits paid	(3,621)	(3,473)
Benefit obligations at end of the year	54,261	57,086	61,225
Fair value at beginning of the year	44,067	48,816
Actual return on plan assets	3,278	(1,572)
Employer contributions	565	800
Change in currency exchange rates	(2,027)	(512)
Fair value of plan assets at end of year	42,268	44,067	48,816
Funded status	(11,993)	(13,019)
Noncurrent pension asset	1,037	1,303
Current	(156)	(167)
Noncurrent	(12,874)	(14,155)
Amounts recognized in the Consolidated Balance Sheets	(11,993)	(13,019)
Accumulated other comprehensive loss - actuarial losses, net	32,514	34,137
Total	20,521	21,118
Accumulated benefit obligations (ABO)	54,261	57,086
OPEB
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of the year	3,238	3,882
Interest cost	96	108	114
Actuarial losses (gains)	(263)	(336)
Benefits paid	(327)	(416)
Benefit obligations at end of the year	2,744	3,238	$ 3,882
Funded status	(2,744)	(3,238)
Current	(434)	(465)
Noncurrent	(2,310)	(2,773)
Amounts recognized in the Consolidated Balance Sheets	(2,744)	(3,238)
Accumulated other comprehensive loss - actuarial losses, net	679	790
Prior service credit		(541)
Accumulated other comprehensive income (loss)	$ 679	$ 249