Loans- Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Deferred Income	$ 3,645,000	$ 2,618,000
Nonaccrual loans and loans past due ninety days	21,140,000	27,672,000	[1]	40,955,000
Reduction in interest income	1,900,000	1,000,000		1,900,000
Loans and Leases Receivable, Related Parties	4,514,000	4,771,000
Loans and Leases Receivable, Related Parties, Additions	867,000
Loans and Leases Receivable, Related Parties, Collections	1,173,000
Loans Pledged as Collateral	$ 130	$ 50,000,000
Maximum [Member] | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Specific allowance on substandard loans, maximum percentage	30.00%

[1] All purchased loans disclosed were acquired in 2014 and were therefore not presented as part of this table.