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10. Income Taxes (Details-Income Tax Expense) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current federal tax expense	$ 1,348us-gaap_CurrentFederalTaxExpenseBenefit	$ 977us-gaap_CurrentFederalTaxExpenseBenefit	$ 369us-gaap_CurrentFederalTaxExpenseBenefit
Current state tax expense	1,316	365	49
Deferred federal tax expense	18,338	13,306	2,826
Deferred state tax expense (benefit)	1,724	1,520	(654)
Change in valuation allowance	0	0	(62,811)
Income tax expense (benefit)	$ 22,726us-gaap_IncomeTaxExpenseBenefit	$ 16,168us-gaap_IncomeTaxExpenseBenefit	$ (60,221)us-gaap_IncomeTaxExpenseBenefit

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

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

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

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