Employee Benefit Plans - Funded Status of Defined Benefit Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Noncurrent pension asset	$ 1,898	$ 2,593
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of the year	53,978	54,261
Interest cost	1,808	2,072	$ 2,302
Participant contributions	5	5
Actuarial losses (gains)	(2,511)	596
Settlement gain		(315)
Change in currency exchange rates	(545)	908
Benefits paid	(3,486)	(3,549)
Benefit obligations at end of the year	49,249	53,978	54,261
Fair value at beginning of the year	44,222	42,268
Actual return on plan assets	(2,237)	3,726
Employer contributions	2,792	1,006
Participant contributions	5	5
Change in currency exchange rates	(670)	766
Benefits paid	(3,486)	(3,549)
Fair value of plan assets at end of year	40,626	44,222	$ 42,268
Funded status	(8,623)	(9,756)
Noncurrent pension asset	1,898	2,593
Current	(132)	(155)
Noncurrent	(10,389)	(12,194)
Amounts recognized in the Consolidated Balance Sheets	(8,623)	(9,756)
Accumulated other comprehensive loss - actuarial losses, net	31,601	30,435
Total	22,978	20,679
Accumulated benefit obligations (ABO)	$ 49,249	$ 53,978