Equity and Noncontrolling Interest - Reclassifications (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (41,855)	$ (28,967)
Other Comprehensive Income (Loss) Before Reclassifications	280	5,022
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	562	705
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	842	5,727
Related Tax Amounts	(734)	(739)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	108	4,988
Accumulated Other Comprehensive Loss, Balance at End of Period	(41,747)	(23,979)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	3,336	4,709
Other Comprehensive Income (Loss) Before Reclassifications	(1,630)	3,757
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(1,630)	3,757
Related Tax Amounts	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,630)	3,757
Accumulated Other Comprehensive Loss, Balance at End of Period	1,706	8,466
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(46,914)	(34,260)
Other Comprehensive Income (Loss) Before Reclassifications	762	(562)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	1,056	750
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1,818	188
Related Tax Amounts	(512)	(131)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,306	57
Accumulated Other Comprehensive Loss, Balance at End of Period	(45,608)	(34,203)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	0	(272)
Other Comprehensive Income (Loss) Before Reclassifications	0	(10)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	158
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	0	148
Related Tax Amounts	0	(52)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	96
Accumulated Other Comprehensive Loss, Balance at End of Period	0	(176)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,723	856
Other Comprehensive Income (Loss) Before Reclassifications	1,148	1,837
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	(494)	(203)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	654	1,634
Related Tax Amounts	(222)	(556)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	432	1,078
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 2,155	$ 1,934