Derivatives Derivatives designated as cash flow hedges (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) position	Dec. 31, 2014 USD ($) position	Dec. 31, 2010 USD ($)
Derivative [Line Items]
Notional Amount	$ 10,932,000	$ 11,498,000
Life (Years)
Interest Rate Swap One [Member] | Hedging Instrument [Member]
Derivative [Line Items]
Number of positions | position	1	1
Notional Amount	$ 5,155,000	$ 5,155,000	$ 5,200,000
Asset	0	0
Liability	$ 226,000	$ 213,000
Receive Rate (as a percent)	0.32%	0.23%
Pay Rate (as a percent)	2.59%	2.59%	2.59%
Life (Years)	4 years 9 months 18 days	5 years 9 months 18 days
Interest Rate Swap Two [Member] | Hedging Instrument [Member]
Derivative [Line Items]
Number of positions | position	1	1
Notional Amount	$ 10,000,000	$ 10,000,000
Asset	0	0
Liability	$ 71,000	$ 74,000
Receive Rate (as a percent)	0.225%	0.16%
Pay Rate (as a percent)	1.43%	1.43%
Life (Years)	3 years	4 years