Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (73,316)	$ (54,406)
Other Comprehensive Income (Loss) Before Reclassifications	4,386	(8,345)
Amounts Reclassified from AOCI	1,296	717
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	5,682	(7,628)
Related Tax Amounts	(368)	(937)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5,314	(8,565)
Accumulated Other Comprehensive Loss, Balance at End of Period	(68,002)	(62,971)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(38,544)	(14,312)
Other Comprehensive Income (Loss) Before Reclassifications	4,671	(11,113)
Amounts Reclassified from AOCI	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	4,671	(11,113)
Related Tax Amounts	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,671	(11,113)
Accumulated Other Comprehensive Loss, Balance at End of Period	(33,873)	(25,425)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(35,251)	(41,551)
Other Comprehensive Income (Loss) Before Reclassifications	(477)	2,498
Amounts Reclassified from AOCI	798	881
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	321	3,379
Related Tax Amounts	(134)	(901)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	187	2,478
Accumulated Other Comprehensive Loss, Balance at End of Period	(35,064)	(39,073)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	479	1,457
Other Comprehensive Income (Loss) Before Reclassifications	192	270
Amounts Reclassified from AOCI	498	(164)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	690	106
Related Tax Amounts	(234)	(36)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	456	70
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 935	$ 1,527