Investment Securities (Schedule Of Realized Gross Gains And Losses On Sale From Available For Sale Portfolio) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Investment Securities [Abstract]
Gross gains on sales of securities	$ 133,000		$ 728,000		$ 5,867,000		$ 770,000
Gross losses on sales of securities	0		(824,000)		0		(1,193,000)
Net gain/(loss) on sales of securities	133,000	[1]	(96,000)	[1]	5,867,000	[1]	(423,000)	[1]
Venture capital investments	(995,000)	[2]	0	[2]	(2,995,000)	[2]	0	[2]
Total securities gain/ (loss), net	(862,000)		(96,000)		2,872,000		(423,000)
Proceeds from sales	3,300,000		44,900,000		9,200,000		63,800,000
Equity securities proceeds from sales					$ 1,400,000

[1] Proceeds from sales for the three months ended September 30, 2014 were $3.3 million. Proceeds for the nine months ended September 30, 2014 were $9.2 million, inclusive of $1.4 million of equity securities. Proceeds from the three and nine months ended September 30, 2013, were $44.9 million and $63.8 million, respectively.

[2] Includes losses on sales, write-offs and /or unrealized fair value adjustments related to venture capital investments