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Income taxes (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Continuing operations	$ (10,048)	$ 4,090	$ (31,205)	$ (28,063)
Discontinued operations	(321)	64	(765)	36
Comprehensive provision for income taxes	$ (10,369)	$ 4,154	$ (31,970)	$ (28,027)

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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