Earnings Per Common Share ("EPS") (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 6,149	$ 6,196
Less: Preferred stock dividends	368	369
Net income available to common shareholders	5,781	5,827
Less: Earnings allocated to participating securities		2
Net income available to common shareholders for EPS	$ 5,781	$ 5,825
Total shares issued	14,162	14,162
Unvested restricted stock awards	(80)	(127)
Treasury shares	(365)	(360)
Total basic weighted average common shares outstanding	13,717	13,675
Exercise of stock options	7	3
Vesting of restricted stock awards	43	55
Total diluted weighted average common shares outstanding	13,767	13,733
Basic earnings per common share	$ 0.42	$ 0.43
Diluted earnings per common share	$ 0.42	$ 0.42
Stock Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive shares excluded from computation of diluted EPS	151	318