Securities Available For Sale (Summary Of Fair Value Of Securities With Continuous Unrealized Losses) (Details) $ in Thousands	Mar. 31, 2016 USD ($) security	Dec. 31, 2015 USD ($) security
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 66,482	$ 148,059
Securities with continuous unrealized losses, Less than 12 months, Number of Investments | security	93	199
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	$ 543	$ 1,880
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	$ 37,794	$ 38,756
Securities with continuous unrealized losses, 12 months or longer, Number of Investments | security	76	71
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	$ 560	$ 1,161
Securities with continuous unrealized losses, Total, Estimated Fair Value	$ 104,276	$ 186,815
Securities with continuous unrealized losses, Total, Number of Investments | security	169	270
Securities with continuous unrealized losses, Total, Unrealized Losses	$ 1,103	$ 3,041
US Government-Sponsored Enterprises [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 39,925	$ 112,770
Securities with continuous unrealized losses, Less than 12 months, Number of Investments | security	44	142
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	$ 281	$ 1,342
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	$ 21,796	$ 23,646
Securities with continuous unrealized losses, 12 months or longer, Number of Investments | security	36	33
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	$ 319	$ 813
Securities with continuous unrealized losses, Total, Estimated Fair Value	$ 61,721	$ 136,416
Securities with continuous unrealized losses, Total, Number of Investments | security	80	175
Securities with continuous unrealized losses, Total, Unrealized Losses	$ 600	$ 2,155
US Government Agencies [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 9,580	$ 20,201
Securities with continuous unrealized losses, Less than 12 months, Number of Investments | security	15	30
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	$ 54	$ 326
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	$ 6,485	$ 11,232
Securities with continuous unrealized losses, 12 months or longer, Number of Investments | security	16	22
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	$ 91	$ 221
Securities with continuous unrealized losses, Total, Estimated Fair Value	$ 16,065	$ 31,433
Securities with continuous unrealized losses, Total, Number of Investments | security	31	52
Securities with continuous unrealized losses, Total, Unrealized Losses	$ 145	$ 547
Private Label [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 239	$ 235
Securities with continuous unrealized losses, Less than 12 months, Number of Investments | security	3	2
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	$ 11	$ 2
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	$ 166	$ 178
Securities with continuous unrealized losses, 12 months or longer, Number of Investments | security	5	5
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	$ 9	$ 9
Securities with continuous unrealized losses, Total, Estimated Fair Value	$ 405	$ 413
Securities with continuous unrealized losses, Total, Number of Investments | security	8	7
Securities with continuous unrealized losses, Total, Unrealized Losses	$ 20	$ 11
Obligations Of States And Political Subdivisions Thereof [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 16,738	$ 14,853
Securities with continuous unrealized losses, Less than 12 months, Number of Investments | security	31	25
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	$ 197	$ 210
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	$ 9,347	$ 3,700
Securities with continuous unrealized losses, 12 months or longer, Number of Investments | security	19	11
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	$ 141	$ 118
Securities with continuous unrealized losses, Total, Estimated Fair Value	$ 26,085	$ 18,553
Securities with continuous unrealized losses, Total, Number of Investments | security	50	36
Securities with continuous unrealized losses, Total, Unrealized Losses	$ 338	$ 328