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, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in Plan Assets:
Plan assets at fair value, beginning of year	$ 401,929
Plan assets at fair value, end of year	431,747	$ 401,929
Net Amount Recognized in Consolidated Balance Sheets:
Noncurrent accrued benefit liability	(212,280)	(186,380)
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	84,500	79,000
Defined benefit pension plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	567,502	639,319
Service cost	4,479	4,223	$ 4,045
Interest cost	19,309	18,117	17,961
Impact of currency exchange rate changes	1,500	(7,793)
Actuarial loss (gain)	72,353	(34,214)
Benefits paid	(36,991)	(50,211)
Plan amendments	0	809
Settlements	0	(2,748)
Benefit obligation, end of year	628,152	567,502	639,319
Change in Plan Assets:
Plan assets at fair value, beginning of year	401,929	460,952
Actual return on plan assets	60,721	(18,162)
Employer contributions	3,670	18,216
Impact of currency exchange rate changes	2,418	(5,554)
Benefits paid	(36,991)	(50,211)
Settlements	0	(3,312)
Plan assets at fair value, end of year	431,747	401,929	460,952
Net Amount Recognized in Consolidated Balance Sheets:
Funded status, end of year	(196,405)	(165,573)
Current accrued benefit liability	(4,593)	(4,395)
Noncurrent accrued benefit liability	(191,812)	(161,178)
Net amount recognized	(196,405)	(165,573)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	266,714	238,862
Prior service cost (credit)	182	220
Total amount recognized in accumulated other comprehensive loss, before tax	266,896	239,082
Postretirement benefit plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	6,201	7,752
Service cost	1	1	2
Interest cost	201	208	812
Impact of currency exchange rate changes	0	0
Actuarial loss (gain)	1,486	(596)
Benefits paid	(2,108)	(1,164)
Plan amendments	0	0
Settlements	0	0
Benefit obligation, end of year	5,781	6,201	7,752
Change in Plan Assets:
Plan assets at fair value, beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	2,108	1,164
Impact of currency exchange rate changes	0	0
Benefits paid	(2,108)	(1,164)
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	(5,781)	(6,201)
Current accrued benefit liability	(750)	(1,090)
Noncurrent accrued benefit liability	(5,031)	(5,111)
Net amount recognized	(5,781)	(6,201)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	(1,201)	(3,071)
Prior service cost (credit)	(12,186)	(14,224)
Total amount recognized in accumulated other comprehensive loss, before tax	$ (13,387)	$ (17,295)