Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						3 Months Ended					3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Additional Paid-in Capital	Dec. 31, 2012 Additional Paid-in Capital	Mar. 31, 2012 Additional Paid-in Capital	Dec. 31, 2011 Additional Paid-in Capital	Mar. 31, 2013 Accumulated Deficit	Mar. 31, 2012 Accumulated Deficit	Mar. 31, 2012 Accumulated Other Comprehensive Loss	Mar. 31, 2013 Accumulated Other Comprehensive Loss	Dec. 31, 2012 Accumulated Other Comprehensive Loss	Mar. 31, 2013 Non controlling Interests	Mar. 31, 2012 Non controlling Interests
Changes in shareholders equity that are attributable to shareholders and non controlling interests
Balances	$ 60,875	$ 93,187	$ 214,481	$ 214,481	$ 214,294	$ 214,294	$ (144,864)	$ (109,666)	$ (11,827)	$ (9,086)	$ (9,086)	$ 344	$ 386
Net (loss) income	(10,177)	(2,962)					(10,358)	(3,144)				181	182
Other comprehensive income		1,720							1,720
Cash distributions to non controlling interests	(199)	(182)										(199)	(182)
Contributions from new members to non controlling interests		17											17
Balances	$ 50,499	$ 91,780	$ 214,481	$ 214,481	$ 214,294	$ 214,294	$ (155,222)	$ (112,810)	$ (10,107)	$ (9,086)	$ (9,086)	$ 326	$ 403