Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	$ 398,174	$ 367,884
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	12,023	5,099
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	1,158	3,517
Securities available-for-sale	409,039	369,466
U.S Treasuries and U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	4	5
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Securities available-for-sale	4	5
Obligations Of States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	57,224	49,725
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	2,070	979
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	3	7
Securities available-for-sale	59,291	50,697
U.S. Government Agencies Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	306,201	287,933
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	7,035	2,285
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	128	2,021
Securities available-for-sale	313,108	288,197
Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	1,108	1,222
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	3	9
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Securities available-for-sale	1,111	1,231
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	6,046	6,550
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,178	463
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	901	1,155
Securities available-for-sale	6,323	5,858
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	23,930	18,793
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	436	221
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	126	321
Securities available-for-sale	24,240	18,693
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	394,513	364,228
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	10,722	3,957
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	1,158	3,504
Securities available-for-sale	404,077	364,681
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	2,136	2,131
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,283	1,142
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Securities available-for-sale	3,419	3,273
Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	1,525	1,525
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	18	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	13
Securities available-for-sale	$ 1,543	$ 1,512