Accumulated Other Comprehensive Loss, Equity and Redeemable Noncontrolling Interests (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Changes in Accumulated other comprehensive loss
Cumulative currency translation adjustment, beginning balance	$ 18,320
Benefit plan liability, beginning balance	(64,018)
Fair value change of derivatives, beginning balance	250
Accumulated other comprehensive loss, beginning balance	(45,448)
Other comprehensive income (loss) before reclassifications, Cumulative currency translation adjustment	(9,292)
Other comprehensive income (loss) before reclassifications, Benefit plan liability	792
Other income (loss) before reclassifications, Fair value change of derivatives comprehensive	491
Other comprehensive income (loss) before reclassification, Accumulated other comprehensive loss	(8,009)
Amounts reclassified from accumulated other comprehensive income (loss), Cumulative currency translation adjustment
Amounts reclassified from accumulated other comprehensive income (loss), Benefit plan liability	216
Amounts reclassified from accumulated other comprehensive income (loss), Fair value change of derivatives	(7)
Amounts reclassified from accumulated other comprehensive income (loss)	209
Net current period other comprehensive income (loss), Cumulative currency translation adjustment	(9,292)
Net current period other comprehensive income (loss), Benefit plan liability	1,008
Net current period other comprehensive income (loss), Fair value change of derivatives	484
Net current period other comprehensive income (loss), Accumulated other comprehensive loss	(7,800)
Cumulative currency translation adjustment, Ending balance	9,028
Benefit plan liability, Ending balance	(63,010)
Fair value change of derivatives, Ending balance	734
Accumulated other comprehensive loss, Ending balance	$ (53,248)