Federal Home Loan Bank Advances and Borrowings - Summary of Advances Outstanding from FHLB (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]  
Advance $ 22,000
Outstanding FHLB Advance 1 [Member]  
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]  
Advance 2,000
Interest Basis Fixed
Current Rate 4.06%
Maturity Feb. 01, 2019
Outstanding FHLB Advance 2 [Member]  
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]  
Advance 15,000
Interest Basis Fixed
Current Rate 1.04%
Maturity Jan. 26, 2016
Outstanding FHLB Advance 3 [Member]  
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]  
Advance $ 5,000
Interest Basis Fixed
Current Rate 3.96%
Maturity Jul. 02, 2018