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Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Operating Loss Carryforwards [Line Items]    
Effective Income Tax Rate Reconciliation, Percent 18.00% 24.10%
Decreased deferred tax assets net $ 27,600,000  
Recognized net deferred tax asset 79,374,000 51,757,000
Deferred Tax Assets, Valuation Allowance 5,589,000 7,980,000
Deferred tax asset related to federal and state net operating loss carry forwards outstanding 9,100,000 14,800,000
Tax benefits from federal net operating loss carry forwards 8,300,000  
Net deferred tax asset relating to NUBILs available to reduce tax liability in future years 1,800,000  
Threshold are measured as the largest amount of tax benefit 50.00%  
Tax Credit Carryforward Annual Limitations on Deductions From Taxable Income 1,600,000  
Tax Credit Carryforward, Valuation Allowance 1,400,000  
Arizona [Member]
   
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Valuation Allowance 1,400,000  
Tax benefits from state net operating loss carry forwards $ 1,500,000