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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards [Line Items]    
Valuation allowance $ 0 $ 20
Alternative minimum tax credit 3,525 3,338
Enterprise Zone Credits    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforward amount 1,596  
California    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 1,046  
California | Capital Loss Carryforward    
Operating Loss Carryforwards [Line Items]    
Valuation allowance   $ 20
Tax credit carryforward amount 282  
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 0