Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (60,771)	$ (31,587)	$ (54,406)	$ (34,700)
Other Comprehensive Income (Loss) Before Reclassifications	(11,704)	(9,735)	(18,669)	(6,030)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	670	459	2,113	331
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11,034)	(9,276)	(16,556)	(5,699)
Related Tax Amounts	40	(550)	(803)	(1,014)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(10,994)	(9,826)	(17,359)	(6,713)
Accumulated Other Comprehensive Loss, Balance at End of Period	(71,765)	(41,413)	(71,765)	(41,413)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(22,833)	3,208	(14,312)	1,152
Other Comprehensive Income (Loss) Before Reclassifications	(11,013)	(11,409)	(19,534)	(9,353)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11,013)	(11,409)	(19,534)	(9,353)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(11,013)	(11,409)	(19,534)	(9,353)
Accumulated Other Comprehensive Loss, Balance at End of Period	(33,846)	(8,201)	(33,846)	(8,201)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(39,124)	(36,274)	(41,551)	(37,433)
Other Comprehensive Income (Loss) Before Reclassifications	170	1,698	1,821	1,842
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	849	759	2,608	2,290
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,019	2,457	4,429	4,132
Related Tax Amounts	(313)	(660)	(1,296)	(1,176)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	706	1,797	3,133	2,956
Accumulated Other Comprehensive Loss, Balance at End of Period	(38,418)	(34,477)	(38,418)	(34,477)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,186	1,479	1,457	1,581
Other Comprehensive Income (Loss) Before Reclassifications	(861)	(24)	(956)	1,481
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	(179)	(300)	(495)	(1,959)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(1,040)	(324)	(1,451)	(478)
Related Tax Amounts	353	110	493	162
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(687)	(214)	(958)	(316)
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 499	$ 1,265	$ 499	$ 1,265