Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (Numerator) [Abstract]
Net income as reported	$ 3,426	$ 4,108	$ 3,747	$ 3,428	$ 3,502	$ 3,365	$ 3,242	$ 2,856	$ 14,709	$ 12,965	$ 12,688
Less dividends and amortization of premium on preferred stock									0	384	723
Basic EPS: Income available to common shareholders									14,709	12,581	11,965
Diluted EPS: Income available to common shareholders plus assumed conversions									$ 14,709	$ 12,581	$ 11,965
Shares (Denominator) [Abstract]
Weighted average number of common shares outstanding									10,638,527	10,469,446	9,828,925
Incremental shares									72,337	51,609	17,606
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)									10,710,864	10,521,055	9,846,531
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$ 0.32	$ 0.39	$ 0.35	$ 0.32	$ 0.33	$ 0.31	$ 0.29	$ 0.27	$ 1.38	$ 1.20	$ 1.22
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$ 0.32	$ 0.38	$ 0.35	$ 0.32	$ 0.33	$ 0.31	$ 0.29	$ 0.27	$ 1.37	$ 1.20	$ 1.22
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	42,000				42,000				42,000	42,000	42,000
Warrants issued to U.S. Treasury	225,904				225,904				225,904	225,904	225,904
Total Dilutive Securities	267,904				267,904				267,904	267,904	267,904
In-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	0				0				0	0	0
Warrants issued to U.S. Treasury	225,904				225,904				225,904	225,904	0
Total Dilutive Securities	225,904				225,904				225,904	225,904	0
Out-of-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	42,000				42,000				42,000	42,000	42,000
Warrants issued to U.S. Treasury	0				0				0	0	225,904
Total Dilutive Securities	42,000				42,000				42,000	42,000	267,904