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, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in Plan Assets:
Plan assets at fair value, beginning of year	$ 435,274
Plan assets at fair value, end of year	433,780	$ 435,274
Net Amount Recognized in Consolidated Balance Sheets:
Noncurrent accrued benefit liability	(192,466)	(195,916)
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	85,700	86,800
Defined benefit pension plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	611,490	677,641
Service cost	5,557	6,105	$ 7,515
Interest cost	24,526	26,007	27,708
Impact of currency exchange rate changes	(14,535)	(11,016)
Actuarial loss (gain)	25,164	(14,604)
Benefits paid	(46,425)	(67,994)
Plan amendments	74	(4,649)
Benefit obligation, end of year	605,851	611,490	677,641
Change in Plan Assets:
Plan assets at fair value, beginning of year	435,274	475,940
Actual return on plan assets	43,292	(690)
Employer contributions	17,617	33,353
Impact of currency exchange rate changes	(15,978)	(5,335)
Benefits paid	(46,425)	(67,994)
Plan assets at fair value, end of year	433,780	435,274	475,940
Net Amount Recognized in Consolidated Balance Sheets:
Funded status, end of year	(172,071)	(176,216)
Current accrued benefit liability	(4,519)	(7,416)
Noncurrent accrued benefit liability	(167,552)	(168,800)
Total accrued benefit liability	(172,071)	(176,216)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	243,249	244,780
Prior service cost	164	120
Total amount recognized in accumulated other comprehensive loss, before tax	243,413	244,900
Postretirement benefit plans
Change in Benefit Obligation:
Benefit obligation, beginning of year	30,416	34,402
Service cost	52	54	67
Interest cost	1,143	1,194	1,377
Impact of currency exchange rate changes	0	0
Actuarial loss (gain)	(1,686)	(2,981)
Benefits paid	(2,311)	(2,253)
Plan amendments	0	0
Benefit obligation, end of year	27,614	30,416	34,402
Change in Plan Assets:
Plan assets at fair value, beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	2,311	2,253
Impact of currency exchange rate changes	0	0
Benefits paid	(2,311)	(2,253)
Plan assets at fair value, end of year	0	0	$ 0
Net Amount Recognized in Consolidated Balance Sheets:
Funded status, end of year	(27,614)	(30,416)
Current accrued benefit liability	(2,700)	(3,300)
Noncurrent accrued benefit liability	(24,914)	(27,116)
Total accrued benefit liability	(27,614)	(30,416)
Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss (gain)	(49)	1,784
Prior service cost	0	0
Total amount recognized in accumulated other comprehensive loss, before tax	$ (49)	$ 1,784