Equity and Noncontrolling Interest - AOCI Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ (78,170)	$ (80,715)	$ (65,100)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	33,667	(798)	(18,508)
Amounts Reclassed from AOCI	23,939	2,868	3,520
Related Tax Amounts	(6,034)	475	(627)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(26,598)	(78,170)	(80,715)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(44,568)	(49,322)	(31,893)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	41,693	4,754	(17,429)
Amounts Reclassed from AOCI	0	0	0
Related Tax Amounts	0	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(2,875)	(44,568)	(49,322)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(34,533)	(30,551)	(34,093)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	(6,617)	(8,088)	1,543
Amounts Reclassed from AOCI	24,141	3,169	3,085
Related Tax Amounts	(6,458)	937	(1,086)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(23,467)	(34,533)	(30,551)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(320)	0	0
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	(4,257)	(415)	0
Amounts Reclassed from AOCI	0	0	0
Related Tax Amounts	979	95	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(3,598)	(320)	0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	1,251	(842)	886
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	2,848	2,951	(2,622)
Amounts Reclassed from AOCI	(202)	(301)	435
Related Tax Amounts	(555)	(557)	459
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 3,342	$ 1,251	$ (842)