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Provision (Benefit) for Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of consolidated income tax provision (benefit)
Current income taxes	$ (12)	$ (1,144)	$ 1,616
Deferred income taxes	(6,761)	16,783	48,878
Income tax provision (benefit)	$ (6,773)	$ 15,639	$ 50,494

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.