Equity and Noncontrolling Interest - Reclassifications (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	$ (41,747)	$ (23,979)	$ (41,855)	$ (28,967)
Other Comprehensive Income (Loss) Before Reclassifications	(3,855)	(6,866)	(3,574)	(1,844)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	270	589	832	1,294
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(3,585)	(6,277)	(2,742)	(550)
Related Tax Amounts	80	(280)	(655)	(1,019)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,505)	(6,557)	(3,397)	(1,569)
Accumulated Other Comprehensive Loss, Balance at End of Period	(45,252)	(30,536)	(45,252)	(30,536)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	1,706	8,466	3,336	4,709
Other Comprehensive Income (Loss) Before Reclassifications	(3,352)	(7,284)	(4,982)	(3,527)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(3,352)	(7,284)	(4,982)	(3,527)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,352)	(7,284)	(4,982)	(3,527)
Accumulated Other Comprehensive Loss, Balance at End of Period	(1,646)	1,182	(1,646)	1,182
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	(45,608)	(34,203)	(46,914)	(34,260)
Other Comprehensive Income (Loss) Before Reclassifications	(214)	668	549	106
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	1,065	747	2,120	1,497
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	851	1,415	2,669	1,603
Related Tax Amounts	(289)	(418)	(801)	(549)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	562	997	1,868	1,054
Accumulated Other Comprehensive Loss, Balance at End of Period	(45,046)	(33,206)	(45,046)	(33,206)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	0	(176)	0	(272)
Other Comprehensive Income (Loss) Before Reclassifications	0	(2)	0	(12)
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	0	160	0	318
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	0	158	0	306
Related Tax Amounts	0	(55)	0	(107)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	103	0	199
Accumulated Other Comprehensive Loss, Balance at End of Period	0	(73)	0	(73)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Loss, Balance at Beginning of Period	2,155	1,934	1,723	856
Other Comprehensive Income (Loss) Before Reclassifications	(289)	(248)	859	1,589
Reclassifications From Accumulated Comprehensive Income Loss To Income Statement	(795)	(318)	(1,288)	(521)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(1,084)	(566)	(429)	1,068
Related Tax Amounts	369	193	146	(363)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(715)	(373)	(283)	705
Accumulated Other Comprehensive Loss, Balance at End of Period	$ 1,440	$ 1,561	$ 1,440	$ 1,561