Employee Benefit Plans - Summary of Changes in Benefit Obligation and Plan Assets for Defined Benefit Pension and Postretirement Benefit Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in Plan Assets:
Plan assets at fair value, beginning of year	$ 460,952
Plan assets at fair value, end of year	401,929	$ 460,952
Net Amount Recognized in Consolidated Balance Sheets:
Noncurrent accrued benefit liability	(186,380)	(187,830)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Tax benefits related to changes in benefit obligation and plan assets which are also included in accumulated other comprehensive loss	79,000	81,200
Defined benefit pension plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	639,319	605,851
Service cost	4,223	4,045	$ 5,557
Interest cost	18,117	17,961	24,526
Impact of currency exchange rate changes	(7,793)	12,932
Actuarial (gain) loss	(34,214)	32,817
Benefits paid	50,211	34,314
Plan amendments	809	27
Settlements	(2,748)	0
Benefit obligation, end of year	567,502	639,319	605,851
Change in Plan Assets:
Plan assets at fair value, beginning of year	460,952	433,780
Actual return on plan assets	(18,162)	47,727
Employer contributions	18,216	4,807
Impact of currency exchange rate changes	(5,554)	8,952
Benefits paid	(50,211)	(34,314)
Settlements	(3,312)	0
Plan assets at fair value, end of year	401,929	460,952	433,780
Net Amount Recognized in Consolidated Balance Sheets:
Funded status, end of year	(165,573)	(178,367)
Current accrued benefit liability	(4,395)	(16,180)
Noncurrent accrued benefit liability	(161,178)	(162,187)
Net amount recognized	(165,573)	(178,367)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	238,862	243,295
Prior service cost (credit)	220	135
Total amount recognized in accumulated other comprehensive loss, before tax	239,082	243,430
Postretirement benefit plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	7,752	27,614
Service cost	1	2	52
Interest cost	208	812	1,143
Impact of currency exchange rate changes	0	0
Actuarial (gain) loss	(596)	(2,597)
Benefits paid	1,164	1,818
Plan amendments	0	(16,261)
Settlements	0	0
Benefit obligation, end of year	6,201	7,752	27,614
Change in Plan Assets:
Plan assets at fair value, beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	1,164	1,818
Impact of currency exchange rate changes	0	0
Benefits paid	(1,164)	(1,818)
Settlements	0	0
Plan assets at fair value, end of year	0	0	$ 0
Net Amount Recognized in Consolidated Balance Sheets:
Funded status, end of year	(6,201)	(7,752)
Current accrued benefit liability	(1,090)	(1,400)
Noncurrent accrued benefit liability	(5,111)	(6,352)
Net amount recognized	(6,201)	(7,752)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	(3,071)	(2,795)
Prior service cost (credit)	(14,224)	(16,261)
Total amount recognized in accumulated other comprehensive loss, before tax	$ (17,295)	$ (19,056)