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EMPLOYEE BENEFIT PLANS - Obligations and Funded Status (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Amounts recognized in the statement of financial position consist of:
Noncurrent liabilities				$ (95,446)	$ (103,734)
United States | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	$ (44,213)	$ (45,512)
Opening balance sheet adjustment	0	0
Service cost	(349)	(344)	$ (337)
Interest cost	(1,332)	(1,422)	(1,475)
Employee contributions	0	0
Plan settlements and amendments	0	0
Benefits paid	3,476	3,079
Acquisition	0	0
Actuarial gain (loss)	2,942	(14)
Effect of currency rate changes	0	0
Obligation at end of year	(39,476)	(44,213)	(45,512)
Change in plan assets
Fair value of plan assets at beginning of year	37,432	35,802
Opening balance sheet adjustment	0	0
Actual return on plan assets	(1,983)	4,223
Employer contributions	0	486
Employee contributions	0	0
Benefits paid	(3,476)	(3,079)
Settlements	0	0
Effect of currency rate changes	0	0
Fair value of plan assets at end of year	31,973	37,432	35,802
Fair value of plan assets	37,432	35,802	35,802	31,973	37,432
Benefit obligations	(44,213)	(45,512)	(45,512)	(39,476)	(44,213)
Funded status				(7,503)	(6,781)
Amounts recognized in the statement of financial position consist of:
Noncurrent assets				0	0
Current liabilities				0	0
Noncurrent liabilities				(7,503)	(6,781)
Net amount recognized				(7,503)	(6,781)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				(3)	(6)
Net actuarial (loss) gain				(20,268)	(20,418)
Net amount recognized				(20,271)	(20,424)
United States | Other Postretirement Benefits Plans
Change in projected benefit obligation
Obligation at beginning of year	(11,345)	(11,876)
Service cost	(5)	(5)	(4)
Interest cost	(326)	(350)	(389)
Benefits paid	786	970
Actuarial gain (loss)	1,072	(84)
Effect of currency rate changes	0	0
Obligation at end of year	(9,818)	(11,345)	(11,876)
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Employer contributions	786	970
Benefits paid	(786)	(970)
Fair value of plan assets at end of year	0	0	0
Fair value of plan assets	0	0	0	0	0
Benefit obligations	(11,345)	(11,876)	(11,876)	(9,818)	(11,345)
Funded status				(9,818)	(11,345)
Amounts recognized in the statement of financial position consist of:
Current liabilities				(984)	(1,046)
Noncurrent liabilities				(8,834)	(10,299)
Net amount recognized				(9,818)	(11,345)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				18,097	19,616
Net actuarial (loss) gain				(16,593)	(18,882)
Net amount recognized				1,504	734
Foreign Plan
Change in plan assets
Fair value of plan assets at beginning of year	319,033
Fair value of plan assets at end of year	271,472	319,033
Fair value of plan assets	319,033	319,033		271,472	319,033
Foreign Plan | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	(353,017)	(319,551)
Opening balance sheet adjustment	0	(5,321)
Service cost	(2,611)	(2,740)	(1,379)
Interest cost	(7,047)	(7,310)	(5,774)
Employee contributions	(448)	(880)
Plan settlements and amendments	15,191	4,153
Benefits paid	13,453	12,906
Acquisition	(864)	0
Actuarial gain (loss)	6,740	(3,009)
Effect of currency rate changes	19,337	(31,265)
Obligation at end of year	(309,266)	(353,017)	(319,551)
Change in plan assets
Fair value of plan assets at beginning of year	281,602	241,283
Opening balance sheet adjustment	0	2,058
Actual return on plan assets	(6,938)	19,102
Employer contributions	10,821	13,479
Employee contributions	448	880
Benefits paid	(13,453)	(12,905)
Settlements	(16,601)	(4,523)
Effect of currency rate changes	(16,380)	22,228
Fair value of plan assets at end of year	239,499	281,602	241,283
Fair value of plan assets	281,602	241,283	241,283	239,499	281,602
Benefit obligations	(353,017)	(319,551)	(319,551)	(309,266)	(353,017)
Funded status				(69,767)	(71,415)
Amounts recognized in the statement of financial position consist of:
Noncurrent assets				8,910	10,577
Current liabilities				(2,062)	(2,158)
Noncurrent liabilities				(76,615)	(79,834)
Net amount recognized				(69,767)	(71,415)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				(1,419)	(32)
Net actuarial (loss) gain				(58,748)	(54,043)
Net amount recognized				(60,167)	(54,075)
Foreign Plan | Other Postretirement Benefits Plans
Change in projected benefit obligation
Obligation at beginning of year	(3,720)	(3,425)
Service cost	(31)	(28)	(29)
Interest cost	(100)	(98)	(99)
Benefits paid	201	199
Actuarial gain (loss)	646	(131)
Effect of currency rate changes	335	(237)
Obligation at end of year	(2,669)	(3,720)	(3,425)
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Employer contributions	201	199
Benefits paid	(201)	(199)
Fair value of plan assets at end of year	0	0	0
Fair value of plan assets	0	0	0	0	0
Benefit obligations	$ (3,720)	$ (3,425)	$ (3,425)	(2,669)	(3,720)
Funded status				(2,669)	(3,720)
Amounts recognized in the statement of financial position consist of:
Current liabilities				(175)	(208)
Noncurrent liabilities				(2,494)	(3,512)
Net amount recognized				(2,669)	(3,720)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				2	9
Net actuarial (loss) gain				748	154
Net amount recognized				$ 750	$ 163

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