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Stock-Based Compensation - Additional Information (Detail) (USD $)
6 Months Ended 6 Months Ended 9 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2013
Sep. 15, 2012
Indiana Community Bancorp [Member]
Sep. 15, 2012
Parent Company [Member]
Jun. 30, 2013
Restricted Stock [Member]
Jun. 30, 2012
Restricted Stock [Member]
Sep. 30, 2012
Restricted Stock [Member]
Sep. 15, 2012
Restricted Stock [Member]
Indiana Community Bancorp [Member]
Dec. 31, 2012
Restricted Stock [Member]
Parent Company [Member]
Sep. 15, 2012
Restricted Stock [Member]
Parent Company [Member]
Indiana Community Bancorp [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2012
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Remaining shares available for issuance   5,100,000                      
Shares granted during period         75,000           295,000    
Share-based compensation awards, vesting period             36 months           36 months
Unrecognized compensation expense         $ 1,600,000                
Stock based compensation expense 6,000       400,000 100,000     23,000   1,000,000 700,000  
Reversal of compensation expense           $ 400,000           $ 20,000  
Nonvested stock awards               15,000   29,000      
Options outstanding     200,000 300,000