Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (71,790)	$ (60,771)	$ (73,316)	$ (54,406)
Other Comprehensive Income (Loss) Before Reclassifications	(314)	(11,704)	43	(18,669)
Amounts Reclassified from AOCI	433	670	2,449	2,113
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	119	(11,034)	2,492	(16,556)
Related Tax Amounts	(356)	40	(1,203)	(803)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(237)	(10,994)	1,289	(17,359)
Accumulated Other Comprehensive Loss, Balance at End of Period	(72,027)	(71,765)	(72,027)	(71,765)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(38,812)	(22,833)	(38,544)	(14,312)
Other Comprehensive Income (Loss) Before Reclassifications	(892)	(11,013)	(1,160)	(19,534)
Amounts Reclassified from AOCI	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(892)	(11,013)	(1,160)	(19,534)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(892)	(11,013)	(1,160)	(19,534)
Accumulated Other Comprehensive Loss, Balance at End of Period	(39,704)	(33,846)	(39,704)	(33,846)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(34,070)	(39,124)	(35,251)	(41,551)
Other Comprehensive Income (Loss) Before Reclassifications	3	170	116	1,821
Amounts Reclassified from AOCI	713	849	2,313	2,608
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	716	1,019	2,429	4,429
Related Tax Amounts	(256)	(313)	(788)	(1,296)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	460	706	1,641	3,133
Accumulated Other Comprehensive Loss, Balance at End of Period	(33,610)	(38,418)	(33,610)	(38,418)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,092	1,186	479	1,457
Other Comprehensive Income (Loss) Before Reclassifications	575	(861)	1,087	(956)
Amounts Reclassified from AOCI	(280)	(179)	136	(495)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	295	(1,040)	1,223	(1,451)
Related Tax Amounts	(100)	353	(415)	493
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	195	(687)	808	(958)
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 1,287	$ 499	$ 1,287	$ 499