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Income Taxes: (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income tax benefit
Current	$ (79)	$ 0	$ (235)	$ 0
Deferred	622	934	2,498	2,159
Income tax benefit	543	934	2,263	2,159
Components of net deferred tax assets
Net deferred tax assets	$ 32,020		$ 32,020		$ 33,414

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.