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Income Taxes - Narrative (Details)
 12 Months Ended
Dec. 31, 2016
USD ($)
state
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Income Tax Disclosure [Abstract]        
Statutory federal income tax rate 35.00% 35.00% 35.00%  
Income Tax Examination [Line Items]        
Tax credits and other tax benefits from low-income housing tax credit $ 1,100,000 $ 1,100,000 $ 1,100,000  
Amount recognized as a component of income tax expense related low-income housing tax credit 300,000 300,000 200,000  
Investments related to low-income housing tax credits 1,400,000 2,300,000    
Impairment losses recognized from forfeiture or ineligibility 0 0 0  
Future capital commitments related to low-income housing tax credit investments 100,000      
Deferred Tax Assets, Net $ 33,751,000 38,495,000    
Number of states the company files income tax returns in | state 9      
Unrecognized tax benefits $ 1,180,000 1,359,000 1,884,000 $ 1,257,000
Unrecognized tax benefits that would impact effective tax rate 800,000 900,000 $ 1,300,000  
Reduction in unrecognized tax benefit that is reasonably possible due to a lapse of statute of limitations $ 300,000      
Duration of unrecognized tax benefits 12 months      
State and Local Jurisdiction [Member]        
Income Tax Examination [Line Items]        
State valuation allowance   0    
Other Assets        
Income Tax Examination [Line Items]        
Deferred Tax Assets, Net $ 33,800,000 $ 38,500,000