Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (279,763)	$ (188,553)	$ (279,763)	$ (188,553)	$ (313,903)	$ (200,885)	$ (190,854)	$ (174,950)
Pretax income (loss)	22,856	(3,816)	(77,022)	1,882
Income tax effect	1,842	2,230	858	(1,424)
Reclassification of unrealized loss (gain)	10,416	2,050	(3,177)	(16,885)
Reclassification of deferred income taxes	(2,607)	(484)	587	3,966
OtherComprehensiveIncomeLossBeforeReclassificationsDisposalOfBusiness	671		766
Other comprehensive income from unconsolidated subsidiaries	962	2,321	(890)	(1,142)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(243,524)	(181,890)	(243,524)	(181,890)	(274,858)	(170,893)	(187,492)	(177,597)
Pretax income (loss)	30,663	5,602	(73,397)	(4,293)
Income tax effect	0	0	0	0
Reclassification of unrealized loss (gain)	0	0	0	0
Reclassification of deferred income taxes	0	0	0	0
OtherComprehensiveIncomeLossBeforeReclassificationsDisposalOfBusiness	671		766
Other comprehensive income from unconsolidated subsidiaries	0	0	0	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,994)	5,987	(1,994)	5,987	(1,963)	5,358	11,637	14,374
Pretax income (loss)	(7,807)	(9,418)	(3,625)	6,175
Income tax effect	1,842	2,230	858	(1,424)
Reclassification of unrealized loss (gain)	7,761	2,013	(5,946)	(17,175)
Reclassification of deferred income taxes	(1,827)	(475)	1,361	4,037
OtherComprehensiveIncomeLossBeforeReclassificationsDisposalOfBusiness	0		0
Other comprehensive income from unconsolidated subsidiaries	0	0	0	0
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(29,939)	(7,856)	(29,939)	(7,856)	(31,814)	(31,934)	(7,884)	(8,075)
Pretax income (loss)	0	0	0	0
Income tax effect	0	0	0	0
Reclassification of unrealized loss (gain)	2,655	37	2,769	290
Reclassification of deferred income taxes	(780)	(9)	(774)	(71)
OtherComprehensiveIncomeLossBeforeReclassificationsDisposalOfBusiness	0		0
Other comprehensive income from unconsolidated subsidiaries	0	0	0	0
Accumulated Gain (Loss) from Unconsoldated Subsidiaries [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(4,306)	(4,794)	(4,306)	(4,794)	$ (5,268)	$ (3,416)	$ (7,115)	$ (3,652)
Pretax income (loss)	0	0	0	0
Income tax effect	0	0	0	0
Reclassification of unrealized loss (gain)	0	0	0	0
Reclassification of deferred income taxes	0	0	0	0
OtherComprehensiveIncomeLossBeforeReclassificationsDisposalOfBusiness	0		0
Other comprehensive income from unconsolidated subsidiaries	962	2,321	(890)	(1,142)
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of unrealized loss (gain)	1,769	(1,763)	(1,527)	(3,455)
Interest expense, net of interest income [Member] | Currency Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of unrealized loss (gain)	(2,796)	(4,319)	(5,347)	(8,649)
Other income, net [Member] | Currency Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of unrealized loss (gain)	$ 8,788	$ 8,095	$ 928	$ (5,071)