Quarterly Financial Data (Summary Of Unaudited Selected Quarterly Financial Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Data [Abstract]
Interest income	$ 15,220	$ 15,589	$ 16,278	$ 16,797	$ 17,086	$ 17,652	$ 18,109	$ 18,200	$ 63,884	$ 71,046	$ 79,672
Net interest income	9,896	9,935	9,971	10,018	9,661	9,921	10,160	10,102	39,820	39,844	40,152
Net income (loss)	2,105	997	913	1,698	1,480	1,936	905	(248)	5,713	4,074	(1,975)
Net income (loss) applicable to common shares	$ 1,910	$ 803	$ 719	$ 1,504	$ 1,331	$ 1,862	$ 831	$ (322)	$ 4,936	$ 3,703	$ (2,272)
Basic earnings per share	$ 0.26	$ 0.11	$ 0.10	$ 0.20	$ 0.18	$ 0.25	$ 0.11	$ (0.04)	$ 0.66	$ 0.50	$ (0.31)
Diluted earnings per share	$ 0.22	$ 0.10	$ 0.09	$ 0.18	$ 0.16	$ 0.24	$ 0.11	$ (0.04)	$ 0.60	$ 0.49	$ (0.31)