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Other Identifiable Intangible Assets (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Nov. 29, 2012
May 31, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2007
Finite-Lived Intangible Assets [Line Items]              
Amortization of intangible assets     $ 377,000 $ 394,000 $ 1,133,000 $ 1,032,000  
Customer List [Member]              
Finite-Lived Intangible Assets [Line Items]              
Acquisition purchase price   $ 60,000,000          
Intangible asset amortization period   10 years          
Amortization of intangible assets over five years         1,700,000    
Gross intangible assets   $ 3,400,000 3,400,000   3,400,000    
Accumulated amortization     471,000   471,000    
Amortization of intangible assets         340,000    
Customer List [Member] | Stored Value Solutions Division Of Marshall Bank First [Member]              
Finite-Lived Intangible Assets [Line Items]              
Acquisition purchase price             $ 12,000,000
Intangible asset amortization period             12 years
Amortization of intangible assets per year             $ 1,000,000
Amortization of intangible assets over remainder of amortization period             $ 2,300,000
Gross intangible assets     12,000,000   12,000,000    
Accumulated amortization     9,800,000   9,800,000    
Amortization of intangible assets         750,000 $ 750,000  
Software [Member]              
Finite-Lived Intangible Assets [Line Items]              
Acquisition date Nov. 29, 2012            
Acquisition purchase price $ 1,800,000            
Intangible asset amortization period 8 years            
Amortization of intangible assets per year $ 217,000            
Amortization of intangible assets over five years $ 610,000            
Gross intangible assets     1,800,000   1,800,000    
Accumulated amortization     $ 1,300,000   $ 1,300,000