Equity and Noncontrolling Interest - Reclassifications (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (34,700)	$ (41,855)
Other Comprehensive Income (Loss) Before Reclassifications	1,758	280
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	211	562
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,969	842
Related Tax Amounts	(284)	(734)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,685	108
Accumulated Other Comprehensive Loss, Balance at End of Period	(33,015)	(41,747)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,152	3,336
Other Comprehensive Income (Loss) Before Reclassifications	1,070	(1,630)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,070	(1,630)
Related Tax Amounts	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,070	(1,630)
Accumulated Other Comprehensive Loss, Balance at End of Period	2,222	1,706
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(37,433)	(46,914)
Other Comprehensive Income (Loss) Before Reclassifications	25	762
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	769	1,056
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	794	1,818
Related Tax Amounts	(248)	(512)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	546	1,306
Accumulated Other Comprehensive Loss, Balance at End of Period	(36,887)	(45,608)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,581	1,723
Other Comprehensive Income (Loss) Before Reclassifications	663	1,148
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	(558)	(494)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	105	654
Related Tax Amounts	(36)	(222)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	69	432
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 1,650	$ 2,155