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Income Taxes: (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income tax benefit
Current	$ 0	$ 125	$ 0	$ (156)
Deferred	2,898	1,352	3,070	1,877
Income tax benefit	2,898	1,477	3,070	1,721
Components of net deferred tax assets
Net deferred tax assets	$ 34,426		$ 34,426		$ 31,356

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.