FHLBP Advances and Short-Term Borrowed Funds (Aggregate short-term borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Repurchase Agreements [Member]
Short-term Debt [Line Items]
Amount outstanding at end of year	$ 11,889	$ 32,416
Weighted average interest rate at end of year	0.20%	0.20%
Maximum amount outstanding at any month-end	$ 22,360	$ 35,271
Daily average amount outstanding	$ 19,811	$ 25,574
Weighted average interest rate for the year	0.20%	0.20%
Other Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Daily average amount outstanding	$ 450	$ 204
Weighted average interest rate for the year	0.51%	0.51%