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Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
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Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | $ 330,037 | $ 370,315
Securities available-for-sale, Gross Unrealized Gains | 7,039 | 10,131
Securities available-for-sale, Gross Unrealized Losses | 7,829 | 3,324
Securities available-for-sale, Estimated Fair Value | 329,247 | 377,122
U.S Treasuries and U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 2,511 | 3,792
Securities available-for-sale, Gross Unrealized Gains | 61 | 96
Securities available-for-sale, Gross Unrealized Losses | 0 | 0
Securities available-for-sale, Estimated Fair Value | 2,572 | 3,888
Obligations Of States And Political Subdivisions [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 41,109 | 47,293
Securities available-for-sale, Gross Unrealized Gains | 814 | 1,651
Securities available-for-sale, Gross Unrealized Losses | 74 | 15
Securities available-for-sale, Estimated Fair Value | 41,849 | 48,929
U.S. Government Agencies Mortgage-backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 255,889 | 279,336
Securities available-for-sale, Gross Unrealized Gains | 3,351 | 7,231
Securities available-for-sale, Gross Unrealized Losses | 4,601 | 85
Securities available-for-sale, Estimated Fair Value | 254,639 | 286,482
Private Label [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 2,383 | 3,235
Securities available-for-sale, Gross Unrealized Gains | 19 | 37
Securities available-for-sale, Gross Unrealized Losses | 2 | 0
Securities available-for-sale, Estimated Fair Value | 2,400 | 3,272
Trust Preferred Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 13,456 | 15,402
Securities available-for-sale, Gross Unrealized Gains | 1,047 | 55
Securities available-for-sale, Gross Unrealized Losses | 2,495 | 2,812
Securities available-for-sale, Estimated Fair Value | 12,008 | 12,645
Corporate Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 9,783 | 16,152
Securities available-for-sale, Gross Unrealized Gains | 172 | 207
Securities available-for-sale, Gross Unrealized Losses | 639 | 412
Securities available-for-sale, Estimated Fair Value | 9,316 | 15,947
Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 325,131 | 365,210
Securities available-for-sale, Gross Unrealized Gains | 5,464 | 9,277
Securities available-for-sale, Gross Unrealized Losses | 7,811 | 3,324
Securities available-for-sale, Estimated Fair Value | 322,784 | 371,163
Marketable Equity Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 3,381 | 3,381
Securities available-for-sale, Gross Unrealized Gains | 1,575 | 804
Securities available-for-sale, Gross Unrealized Losses | 0 | 0
Securities available-for-sale, Estimated Fair Value | 4,956 | 4,185
Investment Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 1,525 | 1,724
Securities available-for-sale, Gross Unrealized Gains | 0 | 50
Securities available-for-sale, Gross Unrealized Losses | 18 | 0
Securities available-for-sale, Estimated Fair Value | $ 1,507 | $ 1,774

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