Fair Value (Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan held for sale, at fair value	$ 7,590,000		$ 7,590,000		$ 9,265,000
Contractual principal balance of Loan held for sale	7,433,000		7,433,000		9,129,000
Difference in amount of loan held for sale	157,000		157,000		136,000
Impaired loans, carrying amount	2,809,000		2,809,000		4,449,000
Valuation allowance for loans losses	1,584,000		1,584,000		3,103,000
Provision for loan losses	30,000		187,000		1,024,000
Provision for loan lease and other losses		229,000		608,000
Cost of real estate sales	83,000	0	83,000	301,000
Other real estate, carrying value	83,000		83,000		20,000
Obligations of State and Political Subdivisions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Gains or Losses (realized/unrealized) Included in Earnings	(12,000)	(12,000)	143,000	(162,000)
Equity Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Gains or Losses (realized/unrealized) Included in Earnings	0	0	0	0
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	575,741,000		575,741,000		606,032,000
Fair Value, Measurements, Recurring | Obligations of State and Political Subdivisions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	140,529,000		140,529,000		113,497,000
Fair Value, Measurements, Recurring | Equity Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	353,000		353,000		353,000
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	10,473,000		10,473,000		11,185,000
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Obligations of State and Political Subdivisions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	10,120,000		10,120,000		10,832,000
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities	$ 353,000		$ 353,000		$ 353,000