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Securities - Securities Available for Sale (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 692,949 | $ 697,738
Unrealized Gains | 11,016 | 9,827
Unrealized Losses | (16,103) | (21,574)
Fair Value | 687,862 | 685,991
U.S. Treasury [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 0 | 0
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | 0 | 0
U.S. Government Sponsored Entities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 184,938 | 185,205
Unrealized Gains | 2,899 | 2,894
Unrealized Losses | (5,110) | (6,474)
Fair Value | 182,727 | 181,625
States and Political Subdivisions [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 172,586 | 176,490
Unrealized Gains | 4,964 | 3,770
Unrealized Losses | (1,282) | (2,317)
Fair Value | 176,268 | 177,943
Residential and Multi-Family Mortgage [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 248,878 | 248,017
Unrealized Gains | 2,263 | 2,410
Unrealized Losses | (5,313) | (7,820)
Fair Value | 245,828 | 242,607
Commercial Mortgage [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 232 | 385
Unrealized Gains | 0 | 0
Unrealized Losses | (7) | (11)
Fair Value | 225 | 374
Corporate Notes and Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 15,746 | 15,744
Unrealized Gains | 93 | 65
Unrealized Losses | (1,637) | (1,734)
Fair Value | 14,202 | 14,075
Pooled Trust Preferred [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 800 | 800
Unrealized Gains | 0 | 0
Unrealized Losses | (2) | (139)
Fair Value | 798 | 661
Pooled SBA [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 68,749 | 70,077
Unrealized Gains | 797 | 688
Unrealized Losses | (2,722) | (3,044)
Fair Value | 66,824 | 67,721
Other Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,020 | 1,020
Unrealized Gains | 0 | 0
Unrealized Losses | (30) | (35)
Fair Value | $ 990 | $ 985

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- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. + References No definition available. + Details
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- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. + References No definition available. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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