Parent Company Condensed Financial Information (Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 21,030	$ 17,435	$ 16,187
Net cash provided by operating activities	26,703	45,239	45,134
Purchases of available for sale securities	(51,344)	(140,473)	(202,273)
Net cash provided by (used in) investing activities	(231,795)	99,356	285,324
Net proceeds from issuance of common stock	385	229	127
Purchases of treasury stock	(10,302)
Common stock dividends paid	(3,131)
Preferred stock dividends paid			(4,407)
Net cash used in financing activities	66,189	(152,835)	(272,268)
Net increase (decrease) in cash and cash equivalents	(138,903)	(8,240)	58,190
Beginning of period	279,839	288,079	229,889
End of period	140,936	279,839	288,079
Parent Company [Member]
Net income	21,030	17,435	16,187
Equity in undistributed income (loss) of subsidiaries	(3,851)	(1,183)	49,173
Other, net	2,937	(2,341)	(5,437)
Net cash provided by operating activities	20,116	13,911	59,923
Purchases of available for sale securities	(1,121)		(247)
Sales/Maturities of available for sale securities	2,540	32
Investment in/capital contribution to other subsidiaries		15,000
Net cash provided by (used in) investing activities	1,419	15,032	(247)
Net proceeds from issuance of common stock	1,386	2,708	925
Redemption of of subordinated debentures		(35,570)
Purchases of treasury stock	(10,302)
Common stock dividends paid	(3,132)
Preferred stock dividends paid			(74,330)
Other, net		(2,287)	(76)
Net cash used in financing activities	(12,048)	(35,149)	(73,481)
Net increase (decrease) in cash and cash equivalents	9,487	(6,206)	(13,805)
Beginning of period	12,039	18,245	32,050
End of period	$ 21,526	$ 12,039	$ 18,245