CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ (189,102)	$ 324,967	$ 202,455
Foreign currency:
Foreign currency translation, net of tax	13,071	(77,073)	(18,402)
Pension and other postretirement benefits plans:
Discontinued operations, net of tax		65
Pension and other postretirement benefits plans adjustment, net of tax	7,291	(38,802)	(1,392)
Derivatives qualifying as hedges:
Discontinued operations, net of tax		65
Derivatives qualifying as hedges, net of tax	6,876	8,005	2,081
Other comprehensive income (loss), net of tax	27,238	(107,870)	(17,713)
Comprehensive income (loss)	(161,864)	217,097	184,742
Less: comprehensive income attributable to noncontrolling interest	888	1,241	1,408
Comprehensive income (loss) attributable to common shareholders	(162,752)	215,856	183,334
Comprehensive Income Derivatives Qualifying As Hedges
Pension and other postretirement benefits plans:
Discontinued operations, net of tax		(65)	40
Derivatives qualifying as hedges:
Unrealized gain (loss) on derivatives arising during the period, net of tax ($102, $(830), $(4,472), respectively)	515	(1,812)	(5,873)
Reclassification adjustment on derivatives included in net income, net of tax ($3,832, $5,757, $5,668, respectively)	6,361	9,990	7,881
Tax rate adjustments		(108)	33
Discontinued operations, net of tax		(65)	40
Foreign Currency
Foreign currency:
Foreign currency translation continuing operations adjustments, net of tax ($1,210, $(161), $(1,910), respectively)	13,071	(53,386)	(23,105)
Foreign currency translation discontinued operations			4,703
Foreign currency translation divestiture of businesses		(23,687)
Pension and other postretirement benefits plans:
Foreign currency translation, net of tax ($(58), $(20), $151, respectively)	13,071	(53,386)	(23,105)
Defined Benefit Pension and Other Postretirement Plans
Foreign currency:
Foreign currency translation continuing operations adjustments, net of tax ($1,210, $(161), $(1,910), respectively)	(168)	(57)	383
Pension and other postretirement benefits plans:
Prior service cost recognized in net periodic cost, net of tax ($(8), $(9), $(10), respectively)	(12)	(15)	(15)
Transition obligation recognized in net periodic cost, net of tax ($35, $42, $41, respectively)	62	68	69
Unamortized gain (loss) arising during the period, net of tax ($2,285, $(28,841), $(2,207), respectively)	2,910	(50,421)	(3,670)
Net loss recognized in net periodic cost, net of tax ($2,537, $1,399, $1,434, respectively)	4,621	2,488	2,597
Settlement, net of tax ($40, $(2), $(17), respectively)	66	(3)	(23)
Curtailment, net of tax of $(44) in 2012	(74)
Tax rate adjustments	(114)	62	(293)
Discontinued operations, net of tax			(440)
Divestiture of businesses, net of tax of $4,865 in 2011		9,076
Foreign currency translation, net of tax ($(58), $(20), $151, respectively)	(168)	(57)	383
Derivatives qualifying as hedges:
Discontinued operations, net of tax			$ (440)