Equity and Noncontrolling Interest - Reclassifications (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (31,587)	$ (45,252)	$ (34,700)	$ (41,855)
Other Comprehensive Income (Loss) Before Reclassifications	(9,735)	2,005	(6,030)	(1,570)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	459	21	331	854
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(9,276)	2,026	(5,699)	(716)
Related Tax Amounts	(550)	(12)	(1,014)	(667)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(9,826)	2,014	(6,713)	(1,383)
Accumulated Other Comprehensive Loss, Balance at End of Period	(41,413)	(43,238)	(41,413)	(43,238)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	3,208	(1,646)	1,152	3,336
Other Comprehensive Income (Loss) Before Reclassifications	(11,409)	2,527	(9,353)	(2,455)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11,409)	2,527	(9,353)	(2,455)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(11,409)	2,527	(9,353)	(2,455)
Accumulated Other Comprehensive Loss, Balance at End of Period	(8,201)	881	(8,201)	881
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(36,274)	(45,046)	(37,433)	(46,914)
Other Comprehensive Income (Loss) Before Reclassifications	1,698	(1,016)	1,842	(468)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	759	1,019	2,290	3,140
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	2,457	3	4,132	2,672
Related Tax Amounts	(660)	(183)	(1,176)	(984)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,797	(180)	2,956	1,688
Accumulated Other Comprehensive Loss, Balance at End of Period	(34,477)	(45,226)	(34,477)	(45,226)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,479	1,440	1,581	1,723
Other Comprehensive Income (Loss) Before Reclassifications	(24)	494	1,481	1,353
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	(300)	(998)	(1,959)	(2,286)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(324)	(504)	(478)	(933)
Related Tax Amounts	110	171	162	317
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(214)	(333)	(316)	(616)
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 1,265	$ 1,107	$ 1,265	$ 1,107