Pension and Other Post Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2018

Pension and Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

																Other Post-
				Pension Benefits												Retirement Benefits
				2018							2017					2018		2017
Change in benefit obligation				Foreign		U.S.		Total		Foreign		U.S.		Total		U.S.		U.S.
Gross benefit obligation at beginning
	of year			$	118,352	$	62,977	$	181,329	$	103,491	$	67,254	$	170,745	$	4,729	$	4,730
Service cost					3,426		383		3,809		3,219		337		3,556		7		8
Interest cost					2,254		1,847		4,101		2,066		1,932		3,998		130		144
Employee contributions					73		—		73		68		—		68		—		—
Plan settlements					(10)		—		(10)		—		(4,341)		(4,341)		—		—
Benefits paid					(1,639)		(4,330)		(5,969)		(2,503)		(4,031)		(6,534)		(317)		(448)
Plan expenses and premiums paid					(161)		—		(161)		(210)		—		(210)		—		—
Actuarial (gain) loss					(5,561)		(2,143)		(7,704)		(1,164)		1,826		662		(443)		295
Translation differences and other					(5,418)		—		(5,418)		13,385		—		13,385		—		—
Gross benefit obligation at end of year				$	111,316	$	58,734	$	170,050	$	118,352	$	62,977	$	181,329	$	4,106	$	4,729
Change in plan assets
Fair value of plan assets at
year	beginning of year			$	98,622	$	51,964	$	150,586	$	86,844	$	49,197	$	136,041	$	—	$	—
Actual return on plan assets					(2,670)		457		(2,213)		116		6,865		6,981		—		—
Employer contributions					5,269		1,574		6,843		2,867		4,574		7,441		317		448
Employee contributions					73		—		73		68		—		68		—		—
Plan settlements					(10)		—		(10)		—		(4,341)		(4,341)		—		—
Benefits paid					(1,639)		(4,330)		(5,969)		(2,503)		(4,031)		(6,534)		(317)		(448)
Plan expenses and premiums paid					(161)		(250)		(411)		(210)		(300)		(510)		—		—
Translation differences					(4,658)		—		(4,658)		11,440		—		11,440		—		—
Fair value of plan assets at end of year				$	94,826	$	49,415	$	144,241	$	98,622	$	51,964	$	150,586	$	—	$	—
Net benefit obligation recognized				$	(16,490)	$	(9,319)	$	(25,809)	$	(19,730)	$	(11,013)	$	(30,743)	$	(4,106)	$	(4,729)
Amounts recognized in the balance
	sheet consist of:
		Non-current assets		$	—	$	3,656	$	3,656	$	—	$	1,184	$	1,184	$	—	$	—
		Current liabilities			(206)		(559)		(765)		(89)		(560)		(649)		(446)		(459)
		Non-current liabilities			(16,284)		(12,416)		(28,700)		(19,641)		(11,637)		(31,278)		(3,660)		(4,270)
Net benefit obligation recognized				$	(16,490)	$	(9,319)	$	(25,809)	$	(19,730)	$	(11,013)	$	(30,743)	$	(4,106)	$	(4,729)
Amounts not yet reflected in net
	periodic benefit costs and included in
	accumulated other comprehensive loss:
		Prior service credit (cost)		$	1,497	$	—	$	1,497	$	1,744	$	(59)	$	1,685	$	—	$	—
		Accumulated loss			(20,089)		(25,310)		(45,399)		(22,598)		(27,133)		(49,731)		(338)		(823)
		AOCI			(18,592)		(25,310)		(43,902)		(20,854)		(27,192)		(48,046)		(338)		(823)
		Cumulative employer contributions
			in excess of or (below) net periodic
			benefit cost		2,102		15,991		18,093		1,124		16,179		17,303		(3,768)		(3,906)
Net benefit obligation recognized				$	(16,490)	$	(9,319)	$	(25,809)	$	(19,730)	$	(11,013)	$	(30,743)	$	(4,106)	$	(4,729)

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	2018							2017
	Foreign		U.S.		Total		Foreign		U.S.		Total
Projected benefit obligation	$	111,316	$	12,975	$	124,291	$	118,352	$	12,197	$	130,549
Accumulated benefit obligation		107,685		11,808		119,493		114,069		11,456		125,525
Fair value of plan assets		94,826		—		94,826		98,622		—		98,622

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	2018							2017
	Foreign		U.S.		Total		Foreign		U.S.		Total
Projected benefit obligation	$	111,316	$	12,975	$	124,291	$	118,352	$	12,197	$	130,549
Fair value of plan assets		94,826		—		94,826		98,622		—		98,622

Schedule of Net Benefit Costs [Table Text Block]

	2018							2017
	Foreign		U.S.		Total		Foreign		U.S.		Total
Service cost	$	3,426	$	383	$	3,809	$	3,219	$	337	$	3,556
Interest cost		2,254		1,847		4,101		2,066		1,932		3,998
Expected return on plan assets		(2,228)		(2,803)		(5,031)		(1,994)		(3,067)		(5,061)
Settlement loss		2		—		2		—		1,946		1,946
Actuarial loss amortization		881		2,276		3,157		862		2,396		3,258
Prior service (credit) cost
amortization		(175)		59		(116)		(167)		63		(104)
Net periodic benefit cost	$	4,160	$	1,762	$	5,922	$	3,986	$	3,607	$	7,593

		2016
	Foreign		U.S.		Total
Service cost	$	2,378	$	298	$	2,676
Interest cost		2,314		2,114		4,428
Expected return on plan assets		(2,026)		(3,316)		(5,342)
Actuarial loss amortization		839		2,336		3,175
Prior service (credit) cost amortization		(164)		63		(101)
Net periodic benefit cost	$	3,341	$	1,495	$	4,836

		2018		2017		2016
Service cost	$	7	$	8	$	10
Interest cost		130		144		142
Actuarial loss amortization		42		54		—
Net periodic benefit costs	$	179	$	206	$	152

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

			2018							2017
			Foreign		U.S.		Total		Foreign		U.S.		Total
Net (gain) loss arising during
	the period		$	(663)	$	453	$	(210)	$	715	$	(1,672)	$	(957)
Recognition of amortization in net
	periodic benefit cost
		Prior service credit (cost)		175		(59)		116		167		(63)		104
		Actuarial loss		(883)		(2,276)		(3,159)		(862)		(4,342)		(5,204)
Effect of exchange rates on amounts
		included in AOCI		(890)		—		(890)		2,308		—		2,308
Total recognized in other
		comprehensive (income) loss		(2,261)		(1,882)		(4,143)		2,328		(6,077)		(3,749)
Total recognized in net periodic
	benefit cost and other
	comprehensive loss (income)		$	1,899	$	(120)	$	1,779	$	6,314	$	(2,470)	$	3,844

			2016
				Foreign		U.S.		Total
Net gain arising during period			$	2,401	$	3,576	$	5,977
Recognition of amortization in net periodic benefit
		Prior service credit (cost)		164		(63)		101
		Actuarial loss		(839)		(2,336)		(3,175)
Effect of exchange rates on amounts included
	in AOCI			(1,347)		—		(1,347)
Total recognized in other comprehensive loss				379		1,177		1,556
Total recognized in net periodic benefit cost and
	other comprehensive loss		$	3,720	$	2,672	$	6,392

			2018		2017		2016
Net (gain) loss arising during period		$	(443)	$	295	$	(401)
Amortization of actuarial loss in net periodic
	benefit costs		(42)		(54)		—
Total recognized in other comprehensive (income)
	loss		(485)		241		(401)
Total recognized in net periodic benefit cost and
	other comprehensive (income) loss	$	(306)	$	447	$	(249)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

							Other Post-
	Pension Plans						Retirement
	Foreign		U.S.		Total		Benefits
Actuarial loss	$	769	$	2,330	$	3,099	$	—
Prior service credit		(169)		—		(169)		—
	$	600	$	2,330	$	2,930	$	—

Schedule of Assumptions Used [Table Text Block]

					Other Postretirement
	Pension Benefits				Benefits
	2018		2017		2018		2017
U.S. Plans:
Discount rate	4.07	%	3.44	%	4.03	%	3.39	%
Rate of compensation increase	3.63	%	3.63	%	N/A		N/A
Foreign Plans:
Discount rate	2.47	%	2.31	%	N/A		N/A
Rate of compensation increase	2.89	%	2.89	%	N/A		N/A

						Other Postretirement
		Pension Benefits				Benefits
		2018		2017		2018		2017
U.S. Plans:
Discount rate		3.44	%	3.88	%	3.39	%	3.73	%
Expected long-term return on
	plan assets	5.95	%	7.00	%	N/A		N/A
Rate of compensation increase		3.63	%	3.63	%	N/A		N/A
Foreign Plans:
Discount rate		2.33	%	2.17	%	N/A		N/A
Expected long-term return on
	plan assets	2.22	%	2.12	%	N/A		N/A
Rate of compensation increase		2.89	%	2.48	%	N/A		N/A

		2018		2017
Health care cost trend rate for next year		6.20	%	6.40	%
Rate to which the cost trend rate is assumed to decline (the
	ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches the ultimate trend rate		2037		2037

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

		1% Point		1% Point
		Increase		Decrease
Effect on total service and interest cost	$	11	$	(9)
Effect on postretirement benefit obligations		299		(311)

Schedule of Allocation of Plan Assets [Table Text Block]

Asset Category		Target		2018		2017
U.S. Plans
Equity securities		10	%	9	%	59	%
Debt securities		89	%	90	%	40	%
Other		1	%	1	%	1	%
	Total	100	%	100	%	100	%
Foreign Plans
Equity securities and other		24	%	24	%	25	%
Debt securities		76	%	76	%	75	%
	Total	100	%	100	%	100	%

						Fair Value Measurements at December 31, 2018
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	450		$	450	$	—	$	—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	450		$	450	$	—	$	—
Commingled funds measured at NAV					48,965
		Total U.S. pension plan assets		$	49,415
Foreign Pension Assets
Cash and cash equivalents				$	209		$	209	$	—	$	—
Insurance contract					79,873			—		—		79,873
Diversified equity securities - registered investment companies					7,701			—		7,701		—
Fixed income - foreign registered investment companies					2,658			—		2,658		—
Real estate - registered investment companies					2,382			—		—		2,382
	Sub-total of foreign pension assets in fair value hierarchy			$	92,823		$	209	$	10,359	$	82,255
Commingled funds measured at NAV					2,003
		Total foreign pension assets		$	94,826
			Total pension assets in fair value hierarchy	$	93,273		$	659	$	10,359	$	82,255
			Total pension assets measured at NAV		50,968
			Total pension assets	$	144,241

						Fair Value Measurements at December 31, 2017
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	449		$	449	$	—	$	—
Small capitalization common stock					1,508			1,508		—		—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	1,957		$	1,957	$	—	$	—
Commingled funds measured at NAV					48,527
Pooled separate accounts measured at NAV					1,480
		Total U.S. pension plan assets		$	51,964
Foreign Pension Assets
Cash and cash equivalents				$	26		$	26	$	—	$	—
Insurance contract					82,092			—		—		82,092
Diversified equity securities - registered investment companies					9,002			—		9,002		—
Fixed income - foreign registered investment companies					2,951			—		2,951		—
Real estate - registered investment companies					2,428			—		—		2,428
	Subtotal foreign pension assets in fair value hierarchy			$	96,499		$	26	$	11,953	$	84,520
Commingled funds measured at NAV					2,123
		Total foreign pension plan assets		$	98,622
			Total pension assets in fair value hierarchy	$	98,456		$	1,983	$	11,953	$	84,520
			Total pension assets measured at NAV		52,130
			Total pension assets	$	150,586

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

			Insurance		Real Estate
			Contract		Fund		Total
Balance as of December 31, 2016		$	72,778	$	2,041	$	74,819
	Purchases		2,350		—		2,350
	Settlements		(1,661)		—		(1,661)
	Unrealized (losses) gains		(1,425)		188		(1,237)
	Currency translation adjustment		10,050		199		10,249
Balance as of December 31, 2017			82,092		2,428		84,520
	Purchases		4,707		—		4,707
	Settlements		(1,399)		—		(1,399)
	Unrealized (losses) gains		(1,817)		94		(1,723)
	Currency translation adjustment		(3,710)		(140)		(3,850)
Balance as of December 31, 2018		$	79,873	$	2,382	$	82,255

Schedule of Expected Benefit Payments [Table Text Block]

							Other Post-
	Pension Benefits						Retirement
	Foreign		U.S.		Total		Benefits
2019	$	2,240	$	4,515	$	6,755	$	446
2020		2,443		4,286		6,729		422
2021		3,166		4,220		7,386		393
2022		3,124		4,237		7,361		367
2023		3,336		4,860		8,196		349
2024 to 2028		19,212		22,107		41,319		1,380