FHLBP Advances and Short-Term Borrowed Funds (Repurchase Agreements Accounted for as Secured Borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	$ 12,023	$ 11,889
Gross amount of recognized liabilities for repurchase agreements in statement of condition	12,023	11,889
Maturity Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	12,023	11,889
Gross amount of recognized liabilities for repurchase agreements in statement of condition	$ 12,023	$ 11,889