Stockholders' Equity and Noncontrolling Interests (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stockholders’ Equity and Noncontrolling Interests [Line Items]
Unrealized Losses on Qualifying Cash Flow Hedge, Beginning Balance	$ 117	$ (48)
Unrealized Losses on Qualifying Cash Flow Hedge, Other comprehensive loss before reclassifications	(117)	(136)
Unrealized Losses on Qualifying Cash Flow Hedge, Amounts reclassified from other accumulated comprehensive income	0	0
Unrealized Losses on Qualifying Cash Flow Hedge, Net current-period other comprehensive loss	(117)	(136)
Unrealized Losses on Qualifying Cash Flow Hedge, Ending balance	0	(184)
Defined Benefit Plan, Net, Beginning Balance	(12,833)	(30,350)
Defined Benefit Plan, Net, Other comprehensive loss before reclassifications	0	0
Defined Benefit Plan, Net, Amounts reclassified from other accumulated comprehensive income	0	0
Defined Benefit Plan, Net, Net current-period other comprehensive loss	0	0
Defined Benefit Plan, Net, Ending balance	(12,833)	(30,350)
Foreign Currency Translation Adjustments, Beginning Balance	24,963	17,914
Foreign Currency Translation Adjustments, Other comprehensive loss before reclassifications	(970)	(7,692)
Foreign Currency Translation Adjustments, Amounts reclassified from accumulated other comprehensive income	0	0
Foreign Currency Translation Adjustments, Net current-period other comprehensive loss	(970)	(7,692)
Foreign Currency Translation Adjustments, Ending balance	23,993	10,222
Beginning Balance	12,247	(12,484)
Other comprehensive loss before reclassifications	(1,087)	(7,828)
Amounts reclassified from other accumulated comprehensive income	0	0
Net current-period other comprehensive loss	(1,087)	(7,828)
Ending balance	$ 11,160	$ (20,312)