Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (68,002)	$ (62,971)	$ (73,316)	$ (54,406)
Other Comprehensive Income (Loss) Before Reclassifications	(4,029)	1,380	357	(6,965)
Amounts Reclassified from AOCI	720	726	2,016	1,443
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(3,309)	2,106	2,373	(5,522)
Related Tax Amounts	(479)	94	(847)	(843)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,788)	2,200	1,526	(6,365)
Accumulated Other Comprehensive Loss, Balance at End of Period	(71,790)	(60,771)	(71,790)	(60,771)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(33,873)	(25,425)	(38,544)	(14,312)
Other Comprehensive Income (Loss) Before Reclassifications	(4,939)	2,592	(268)	(8,521)
Amounts Reclassified from AOCI	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(4,939)	2,592	(268)	(8,521)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4,939)	2,592	(268)	(8,521)
Accumulated Other Comprehensive Loss, Balance at End of Period	(38,812)	(22,833)	(38,812)	(22,833)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(35,064)	(39,073)	(35,251)	(41,551)
Other Comprehensive Income (Loss) Before Reclassifications	590	(847)	113	1,651
Amounts Reclassified from AOCI	802	878	1,600	1,759
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,392	31	1,713	3,410
Related Tax Amounts	(398)	(82)	(532)	(983)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	994	(51)	1,181	2,427
Accumulated Other Comprehensive Loss, Balance at End of Period	(34,070)	(39,124)	(34,070)	(39,124)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	935	1,527	479	1,457
Other Comprehensive Income (Loss) Before Reclassifications	320	(365)	512	(95)
Amounts Reclassified from AOCI	(82)	(152)	416	(316)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	238	(517)	928	(411)
Related Tax Amounts	(81)	176	(315)	140
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	157	(341)	613	(271)
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 1,092	$ 1,186	$ 1,092	$ 1,186