Consolidated Statement Of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Gain/(Loss) [Member]	Treasury Stock [Member]	Total
Beginning balance, Shares at Dec. 31, 2014	19,193,059
Beginning balance at Dec. 31, 2014	$ 19,811	$ 101,245	$ 160,427	$ (395)	$ (10,302)	$ 270,786
Dividends declared:
Preferred			(1)			(1)
Common			(3,419)			(3,419)
Common stock issued	$ 89	338				427
Common stock issued, shares	88,937
Net common stock issued under employee plans and related tax expense	$ 1	28				29
Net common stock issued under employee plans and related tax expense, shares	1,522
Other comprehensive income, net of tax				767		767
Treasury shares purchased					(4,063)	(4,063)
Treasury shares purchased, shares	(250,799)
Net income			12,818			12,818
Ending balance, Shares at Sep. 30, 2015	19,032,719
Ending balance at Sep. 30, 2015	$ 19,901	101,611	169,825	372	(14,365)	277,344
Beginning balance, Shares at Dec. 31, 2015	20,006,802
Beginning balance at Dec. 31, 2015	$ 21,138	121,966	173,210	(1,290)	(18,926)	296,098
Dividends declared:
Preferred			(1)			(1)
Common			(4,612)			(4,612)
Net common stock issued under employee plans and related tax expense	$ 86	628				714
Net common stock issued under employee plans and related tax expense, shares	85,867
Other comprehensive income, net of tax				2,318		2,318
Treasury shares purchased					(22,233)	(22,233)
Treasury shares purchased, shares	(1,407,284)
Net income			11,536			11,536
Ending balance, Shares at Sep. 30, 2016	18,685,385
Ending balance at Sep. 30, 2016	$ 21,224	$ 122,594	$ 180,133	$ 1,028	$ (41,159)	$ 283,820