XML 90 R59.htm IDEA: XBRL DOCUMENT v2.4.0.8
Acquisition - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jul. 17, 2012
Business Acquisition [Line Items]                        
Common stock outstanding 8,630,966       8,617,466       8,630,966 8,617,466    
Net intangible assets acquired                       $ 2,332,000
Acquisition of goodwill 19,748,000       19,748,000       19,748,000 19,748,000   13,838,000
Purchase price of the business assets                       2,647,000
Total provision charged to operating expense (997,000) 104,000 729,000 2,084,000 1,715,000 1,041,000 209,000 559,000 1,920,000 3,524,000 5,282,000  
Heartland [Member]
                        
Business Acquisition [Line Items]                        
Date of acquisition agreement                 Jul. 17, 2012      
Exchange ratio per share to Heartland shareholder                       $ 0.81
Common stock outstanding                       1,442,449
Common stock issued                 1,168,383      
Market closing price per share                       $ 16.83
Transaction value is estimated                       26,900,000
Costs related to the acquisition                   1,500,000    
Net tangible assets acquired                       26,900,000
Net intangible assets acquired                       2,300,000
Acquisition of goodwill                       13,838,000
Purchase price of the business assets                       10,800,000
Core deposit intangible amortization period                 7 years      
Loan portfolio acquired                       131,100,000
Discount on loan portfolio acquired                       16,500,000
Performing portion of the loan portfolio acquired                       95,400,000
Estimated fair value of performing portion of the loan portfolio                       91,600,000
Heartland Bancshares Inc [Member]
                        
Business Acquisition [Line Items]                        
Total provision charged to operating expense                 2,600,000 0    
Allowances for loan losses                 $ 0 $ 0