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Earnings per share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income / (loss) (numerator):
Loss from continuing operations	$ (3,369)	$ 137	$ (10,304)	$ (6,742)
Income from discontinued operations		986		1,008
Noncontrolling interest	4,212	4,664	7,832	5,559
Dividends on preferred shares	4,669		7,790
Conversion of preferred units		10,456		10,456
Net loss attributable to common shareholders	$ (12,250)	$ (13,997)	$ (25,926)	$ (21,749)
Weighted-average shares (denominator)	185,515,651	95,971,706	185,510,004	72,234,717
Net loss per share- basic and diluted:
Loss from continuing operations (in dollars per share)	$ (0.07)	$ (0.16)	$ (0.14)	$ (0.31)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic and Diluted Share		$ 0.01		$ 0.01
Net loss attributable to common shareholders per share - basic and diluted (in dollars per share)	$ (0.07)	$ (0.15)	$ (0.14)	$ (0.30)

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Value of convertible preferred stock that was converted to other securities.

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Amount of Income (Loss) attributable to the noncontrolling interest.

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