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Pending Acquisition (Details)
$ / shares in Units, $ in Thousands
Apr. 28, 2016
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Business Acquisition [Line Items]      
Total assets   $ 1,271,543 $ 1,276,736
Subsequent Event [Member] | Sierra Vista Bank [Member]      
Business Acquisition [Line Items]      
Transaction value $ 24,000    
Transaction value per share (in dollars per share) | $ / shares $ 5.22    
Share price (in dollars per share) | $ / shares $ 12.00    
Shares issued in acquisition (in shares) | shares 1,069,513    
Cash payment to acquire business $ 11,136    
Merger consideration election, cash (percent) 100.00%    
Merger consideration election, stock (percent) 100.00%    
Breakdown of merger, stock (percent) 58.00%    
Breakdown of merger, cash (percent) 42.00%    
Cash paid per share (in dollars per share) | $ / shares $ 2.18    
Conversion ratio of stock issued 0.2513    
Subsequent Event [Member] | Sierra Vista Bank [Member]      
Business Acquisition [Line Items]      
Total assets $ 155,000