Fair Value of Financial Instruments - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Financial Assets [Abstract]
Available-for-sale Securities	$ 224,067	$ 224,067	$ 250,368
Level 1 [Member]
Financial Assets [Abstract]
Cash and cash equivalents	25,420		30,790
Available-for-sale Securities	26		50
Financial Liabilities
Short-term borrowings	9,000
Level 2 [Member]
Financial Assets [Abstract]
Available-for-sale Securities	221,546		246,284
Accrued interest receivable	4,149		5,270
Financial Liabilities
Demand deposits	83,529		73,665
Interest-bearing brokered deposits	25,000
Savings	53,833		18,721
Time deposits	207,110		223,788
Long-term borrowings	80,258		90,022
Subordinated debt	26,789		25,091
Accrued interest payable	709		726
Derivative Liability			187
Level 3 [Member]
Financial Assets [Abstract]
Available-for-sale Securities	2,495		4,034
Other investment	2,250		2,250
Federal Home Loan Bank stock	2,545		2,622
Loans, net	484,961		400,979
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents	25,420		30,790
Available-for-sale Securities	224,067		250,368
Other investment	2,250		2,250
Federal Home Loan Bank stock	2,545		2,622
Loans, net	489,414		403,424
Accrued interest receivable	4,149		5,270
Financial Liabilities
Demand deposits	83,529		73,665
Interest-bearing brokered deposits	25,000
Savings	53,833		18,721
Time deposits	207,721		225,300
Short-term borrowings	9,000
Long-term borrowings	81,970		92,426
Subordinated debt	25,774		25,774
Accrued interest payable	709		726
Derivative Liability			187
Estimated Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	25,420		30,790
Available-for-sale Securities	224,067		250,368
Other investment	2,250		2,250
Federal Home Loan Bank stock	2,545		2,622
Loans, net	484,961		400,979
Accrued interest receivable	4,149		5,270
Financial Liabilities
Demand deposits	83,529		73,665
Interest-bearing brokered deposits	25,000
Savings	53,833		18,721
Time deposits	207,110		223,788
Short-term borrowings	9,000
Long-term borrowings	80,258		90,022
Subordinated debt	26,789		25,091
Accrued interest payable	709		726
Derivative Liability			$ 187
Interest Rate Swap | Level 2 [Member]
Financial Liabilities
Derivative Liability	555
Interest Rate Swap | Carrying Amount [Member]
Financial Liabilities
Derivative Liability	555
Interest Rate Swap | Estimated Fair Value [Member]
Financial Liabilities
Derivative Liability	$ 555