Derivatives - Two-way client interest rate swaps not designated as either fair value or cash flow hedges (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($) position	Dec. 31, 2015 USD ($) position
Derivative [Line Items]
Notional amount	$ 10,640	$ 10,932
Asset	322	73
Liability	$ 322	$ 73
Life (Years)
Interest Rate Swap [Member] | Interest Rate Swap One [Member]
Derivative [Line Items]
Positions | position	1	1
Notional amount	$ 3,635	$ 3,760
Asset	0	0
Liability	$ 178	$ 21
Rate	3.90%	3.90%
Life (Years)	11 years 3 months 18 days	11 years 10 months 24 days
Interest Rate Swap [Member] | Interest Rate Swap Two [Member]
Derivative [Line Items]
Positions | position	1	1
Notional amount	$ 1,685	$ 1,706
Asset	0	0
Liability	$ 144	$ 52
Rate	4.09%	4.09%
Life (Years)	8 years 3 months 18 days	8 years 10 months 24 days
Reverse Interest Rate Swap [Member] | Interest Rate Swap One [Member]
Derivative [Line Items]
Positions | position	1	1
Notional amount	$ 3,635	$ 3,760
Asset	178	21
Liability	$ 0	$ 0
Rate	3.90%	3.90%
Life (Years)	11 years 3 months 18 days	11 years 10 months 24 days
Reverse Interest Rate Swap [Member] | Interest Rate Swap Two [Member]
Derivative [Line Items]
Positions | position	1	1
Notional amount	$ 1,685	$ 1,706
Asset	144	52
Liability	$ 0	$ 0
Rate	4.09%	4.09%
Life (Years)	8 years 3 months 18 days	8 years 10 months 24 days
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member] | Interest Rate Swap One [Member]
Derivative [Line Items]
Rate	2.00%	2.00%
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member] | Interest Rate Swap Two [Member]
Derivative [Line Items]
Rate	1.80%	1.80%
London Interbank Offered Rate (LIBOR) [Member] | Reverse Interest Rate Swap [Member] | Interest Rate Swap One [Member]
Derivative [Line Items]
Rate	2.00%	2.00%
London Interbank Offered Rate (LIBOR) [Member] | Reverse Interest Rate Swap [Member] | Interest Rate Swap Two [Member]
Derivative [Line Items]
Rate	1.80%	1.80%