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Investment Securities (Unrealized Gains) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | $ 281,447 | $ 319,147
Investment Securities Available-for-Sale: Unrealized Gains | 7,727 | 6,960
Investment Securities Available-for-Sale: Unrealized Losses | (1,703) | (3,037)
Investment securities: Available-for-sale, Fair Value | 287,471 | 323,070
Investment Securities Held-to-Maturity: Amortized Cost | 214,191 | 215,286
Investment Securities Held-to-Maturity: Unrealized Gains | 2,964 | 1,516
Investment Securities Held-to-Maturity: Unrealized Losses | (2,203) | (5,844)
Investment Securities Held-to-Maturity: Fair Value | 214,952 | 210,958
Total investment securities, amortized cost | 495,638 | 534,433
Total investment securities, gross unrealized gains | 10,691 | 8,476
Total investment securities, gross unrealized losses | (3,906) | (8,881)
Total investment securities, fair value | 502,423 | 534,028
U.S. treasury notes [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 14,361 | 14,344
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 0
Investment Securities Available-for-Sale: Unrealized Losses | (465) | (825)
Investment securities: Available-for-sale, Fair Value | 13,896 | 13,519
Investment Securities Held-to-Maturity: Amortized Cost | 28,108 | 28,056
Investment Securities Held-to-Maturity: Unrealized Gains | 0 | 0
Investment Securities Held-to-Maturity: Unrealized Losses | (315) | (1,019)
Investment Securities Held-to-Maturity: Fair Value | 27,793 | 27,037
Federal agency obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 23,381 | 20,567
Investment Securities Available-for-Sale: Unrealized Gains | 23 | 29
Investment Securities Available-for-Sale: Unrealized Losses | (314) | (655)
Investment securities: Available-for-sale, Fair Value | 23,090 | 19,941
Investment Securities Held-to-Maturity: Amortized Cost | 14,521 | 15,249
Investment Securities Held-to-Maturity: Unrealized Gains | 106 | 23
Investment Securities Held-to-Maturity: Unrealized Losses | (71) | (389)
Investment Securities Held-to-Maturity: Fair Value | 14,556 | 14,883
Residential mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 46,354 | 48,312
Investment Securities Available-for-Sale: Unrealized Gains | 936 | 791
Investment Securities Available-for-Sale: Unrealized Losses | (102) | (229)
Investment securities: Available-for-sale, Fair Value | 47,188 | 48,874
Investment Securities Held-to-Maturity: Amortized Cost | 2,160 | 2,246
Investment Securities Held-to-Maturity: Unrealized Gains | 0 | 0
Investment Securities Held-to-Maturity: Unrealized Losses | (35) | (64)
Investment Securities Held-to-Maturity: Fair Value | 2,125 | 2,182
Commercial mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 3,079 | 7,145
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 3
Investment Securities Available-for-Sale: Unrealized Losses | (116) | (157)
Investment securities: Available-for-sale, Fair Value | 2,963 | 6,991
Investment Securities Held-to-Maturity: Amortized Cost | 4,379 | 4,417
Investment Securities Held-to-Maturity: Unrealized Gains | 59 | 41
Investment Securities Held-to-Maturity: Unrealized Losses | (39) | (62)
Investment Securities Held-to-Maturity: Fair Value | 4,399 | 4,396
Obligations of U.S. states and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 14,353 | 30,804
Investment Securities Available-for-Sale: Unrealized Gains | 586 | 711
Investment Securities Available-for-Sale: Unrealized Losses | 0 | (55)
Investment securities: Available-for-sale, Fair Value | 14,939 | 31,460
Investment Securities Held-to-Maturity: Amortized Cost | 127,111 | 127,418
Investment Securities Held-to-Maturity: Unrealized Gains | 2,389 | 1,303
Investment Securities Held-to-Maturity: Unrealized Losses | (1,685) | (3,688)
Investment Securities Held-to-Maturity: Fair Value | 127,815 | 125,033
Trust preferred securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 19,764 | 19,763
Investment Securities Available-for-Sale: Unrealized Gains | 329 | 150
Investment Securities Available-for-Sale: Unrealized Losses | (296) | (510)
Investment securities: Available-for-sale, Fair Value | 19,797 | 19,403
Corporate bonds and notes [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 136,152 | 154,182
Investment Securities Available-for-Sale: Unrealized Gains | 5,647 | 4,930
Investment Securities Available-for-Sale: Unrealized Losses | (148) | (482)
Investment securities: Available-for-sale, Fair Value | 141,651 | 158,630
Investment Securities Held-to-Maturity: Amortized Cost | 37,912 | 37,900
Investment Securities Held-to-Maturity: Unrealized Gains | 410 | 149
Investment Securities Held-to-Maturity: Unrealized Losses | (58) | (622)
Investment Securities Held-to-Maturity: Fair Value | 38,264 | 37,427
Asset-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 15,386 | 15,733
Investment Securities Available-for-Sale: Unrealized Gains | 168 | 246
Investment Securities Available-for-Sale: Unrealized Losses | 0 | 0
Investment securities: Available-for-sale, Fair Value | 15,554 | 15,979
Certificates of Deposit [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 2,100 | 2,250
Investment Securities Available-for-Sale: Unrealized Gains | 38 | 32
Investment Securities Available-for-Sale: Unrealized Losses | (9) | (20)
Investment securities: Available-for-sale, Fair Value | 2,129 | 2,262
Equity securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 376 | 376
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 0
Investment Securities Available-for-Sale: Unrealized Losses | (84) | (89)
Investment securities: Available-for-sale, Fair Value | 292 | 287
Mutual funds and money market funds [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 6,141 | 5,671
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 68
Investment Securities Available-for-Sale: Unrealized Losses | (169) | (15)
Investment securities: Available-for-sale, Fair Value | $ 5,972 | $ 5,724

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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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