Derivatives designated as a cash flow hedge (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Pay fixed receive floating rate interest rate swap [Member] position	Dec. 31, 2013 Pay fixed receive floating rate interest rate swap [Member] position	Dec. 31, 2010 Hedging Instrument [Member]	Sep. 30, 2014 Hedging Instrument [Member] Pay fixed - receive floating interest rate swap [Member] position	Dec. 31, 2013 Hedging Instrument [Member] Pay fixed - receive floating interest rate swap [Member] position	Sep. 30, 2014 Hedging Instrument [Member] Pay fixed receive floating rate interest rate swap [Member] position	Dec. 31, 2013 Hedging Instrument [Member] Pay fixed receive floating rate interest rate swap [Member] position
Derivative [Line Items]
Number of Positions			1	1		1	1	1	1
Notional Amount	$ 8,122	$ 8,470	$ 4,061	$ 4,235	$ 5,200	$ 5,155	$ 5,155	$ 10,000	$ 10,000
Asset	106	232	0	0		0	0	58	102
Liability	$ 106	$ 232	$ 106	$ 232		$ 142	$ 72	$ 0	$ 0
Receive Rate						0.23%	0.32%	0.15%	0.17%
Pay rate			3.90%	3.90%	2.59%	2.59%	2.59%	1.43%	1.43%
Life (Years)	13 years 2 months 24 days	13 years 10 months 24 days	13 years 2 months 24 days	13 years 10 months 24 days		6 years 1 month 7 days	6 years 9 months 18 days	4 years 2 months 5 days	5 years 0 months 0 days