Consolidated Statements of Changes in Stockholders' Equity Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Deferred Compensation	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2009	$ 111,221	$ 24,635	$ 29,460	$ 26,811	$ 62,144	$ 2,894	$ 464	$ (35,187)
Net income	8,761				8,761
Other Comprehensive Income (Loss), Net of Tax	(2,530)						(2,530)
Dividends on preferred stock ($455, $407, and $850 per sh)	(2,240)				(2,240)
Dividends on common stock ($.38, $.40, and $.42 per sh)	(2,309)				(2,309)
Issuance of 38,494, 44,521, and 53,944 common shares pursuant to the Dividend Reinvestment Plan	680		154	526
Issuance of 4,766, 3,850, 1,650 common shares pursuant to the Deferred Compensation Plan	82		19	63
Issuance of 19,414, 9,693, and 19,366 common shares pursuant to the First Retirement & Savings Plan	342		78	264
Purchase of 136,380, 128,073, and 165,117 treasury shares	(2,499)							(2,499)
Deferred compensation	0					35		(35)
Tax benefit related to deferred compensation distributions	33			33
Issuance of 49,500, 11,392, and 44,763 common shares pursuant to the exercise of stock options	547		198	349
Tax benefit related to exercise of incentive stock options	80			80
Tax benefit related to exercise of non-qualified stock options	45			45
Vested stock options compensation expense	52			52
Balance at Dec. 31, 2010	112,265	24,635	29,909	28,223	66,356	2,929	(2,066)	(37,721)
Net income	11,372				11,372
Other Comprehensive Income (Loss), Net of Tax	5,214						5,214
Dividends on preferred stock ($455, $407, and $850 per sh)	(3,576)				(3,576)
Dividends on common stock ($.38, $.40, and $.42 per sh)	(2,413)				(2,413)
Issuance of 38,494, 44,521, and 53,944 common shares pursuant to the Dividend Reinvestment Plan	807		178	629
Issuance of 4,766, 5,920 and 6,048 common shares pursuant to the Deferred Compensation Plan	108		23	85
Issuance of 4,766, 3,850, 1,650 common shares pursuant to the Deferred Compensation Plan	19,150	19,150
Issuance of 19,414, 9,693, and 19,366 common shares pursuant to the First Retirement & Savings Plan	177		39	138
Issuance of 4,436 and 5,320 restricted common shares pursuant to the 2007 Stock Incentive Plan	83		18	65
Purchase of 136,380, 128,073, and 165,117 treasury shares	(2,385)							(2,385)
Deferred compensation	(108)					(25)		(83)
Issuance of 49,500, 11,392, and 44,763 common shares pursuant to the exercise of stock options	121		45	76
Tax benefit related to exercise of incentive stock options	19			19
Grant of restricted stock units pursuant to the 2007 Stock Incentive Plan	70			70
Tax benefit related to exercise of non-qualified stock options	11			11
Vested stock options compensation expense	52			52
Balance at Dec. 31, 2011	140,967	43,785	30,212	29,368	71,739	2,904	3,148	(40,189)
Net income	14,025				14,025
Other Comprehensive Income (Loss), Net of Tax	1,396						1,396
Dividends on preferred stock ($455, $407, and $850 per sh)	(4,252)				4,252
Dividends on common stock ($.38, $.40, and $.42 per sh)	2,526				2,526
Issuance of 38,494, 44,521, and 53,944 common shares pursuant to the Dividend Reinvestment Plan	1,244		216	1,028
Issuance of 4,766, 5,920 and 6,048 common shares pursuant to the Deferred Compensation Plan	131		24	107
Issuance of 4,766, 3,850, 1,650 common shares pursuant to the Deferred Compensation Plan	8,250	8,250
Issuance of 19,414, 9,693, and 19,366 common shares pursuant to the First Retirement & Savings Plan	413		78	335
Issuance of 4,436 and 5,320 restricted common shares pursuant to the 2007 Stock Incentive Plan	0		21	114		(135)
Purchase of 136,380, 128,073, and 165,117 treasury shares	(3,912)							(3,912)
Deferred compensation	0					145		(145)
Tax benefit related to deferred compensation distributions	29			29
Issuance of 49,500, 11,392, and 44,763 common shares pursuant to the exercise of stock options	712		179	533
Tax benefit related to exercise of incentive stock options	71			71
Grant of restricted stock units pursuant to the 2007 Stock Incentive Plan	0			61		(61)
Tax benefit related to exercise of non-qualified stock options	22			22
Vested stock options compensation expense	17			17
Vested restricted shares/units compensation expense	100	0	0	0	0	100	0	0
Balance at Dec. 31, 2012	$ 156,687	$ 52,035	$ 30,730	$ 31,685	$ 78,986	$ 2,953	$ 4,544	$ (44,246)