Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ (11,138)
Net current-period other comprehensive income (loss)	(661)	(3,656)
Accumulated other comprehensive income (loss), ending balance	(11,799)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(11,923)
Net current-period other comprehensive income (loss)	486
Accumulated other comprehensive income (loss), ending balance	(11,437)
Equity interest in investees’ other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	841
Net current-period other comprehensive income (loss)	(1,173)
Accumulated other comprehensive income (loss), ending balance	(332)
Other changes in other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(56)
Net current-period other comprehensive income (loss)	26
Accumulated other comprehensive income (loss), ending balance	$ (30)