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v3.3.1.900

Securities - Available for Sale Securities, Continuous Unrealized Loss Position, Fair value (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) Security | Dec. 31, 2014 USD ($) Security
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 2,628 | $ 833
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 359,531 | $ 276,192
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 104 | 60
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 2,191 | $ 4,133
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 87,120 | $ 184,458
Available-for-sale, 12 Months or More, Number of Securities | Security | 36 | 73
Available-for-sale, Gross Unrealized Loss | $ 4,819 | $ 4,966
Available-for-sale, Estimated Fair Value | $ 446,651 | $ 460,650
Available-for-sale, Number of Securities | Security | 140 | 133
Municipal bonds-tax exempt [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 19 | $ 0
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 8,922 | $ 0
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 6 | 0
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 0 | $ 91
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 0 | $ 5,538
Available-for-sale, 12 Months or More, Number of Securities | Security | 0 | 5
Available-for-sale, Gross Unrealized Loss | $ 19 | $ 91
Available-for-sale, Estimated Fair Value | $ 8,922 | $ 5,538
Available-for-sale, Number of Securities | Security | 6 | 5
Municipal bonds-taxable [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 88 |
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 7,106 |
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 4 |
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 0 |
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 0 |
Available-for-sale, 12 Months or More, Number of Securities | Security | 0 |
Available-for-sale, Gross Unrealized Loss | $ 88 |
Available-for-sale, Estimated Fair Value | $ 7,106 |
Available-for-sale, Number of Securities | Security | 4 |
Collateralized mortgage obligations [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 335 | $ 350
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 48,970 | $ 78,191
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 18 | 21
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 662 | $ 724
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 32,964 | $ 33,308
Available-for-sale, 12 Months or More, Number of Securities | Security | 13 | 13
Available-for-sale, Gross Unrealized Loss | $ 997 | $ 1,074
Available-for-sale, Estimated Fair Value | $ 81,934 | $ 111,499
Available-for-sale, Number of Securities | Security | 31 | 34
Mortgage-backed securities [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 1,734 | $ 288
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 193,931 | $ 102,704
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 52 | 21
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 727 | $ 915
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 21,659 | $ 50,625
Available-for-sale, 12 Months or More, Number of Securities | Security | 9 | 19
Available-for-sale, Gross Unrealized Loss | $ 2,461 | $ 1,203
Available-for-sale, Estimated Fair Value | $ 215,590 | $ 153,329
Available-for-sale, Number of Securities | Security | 61 | 40
U.S. government agency securities [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 201 | $ 0
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 23,289 | $ 5,000
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 8 | 1
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 455 | $ 1,822
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 24,533 | $ 73,142
Available-for-sale, 12 Months or More, Number of Securities | Security | 8 | 26
Available-for-sale, Gross Unrealized Loss | $ 656 | $ 1,822
Available-for-sale, Estimated Fair Value | $ 47,822 | $ 78,142
Available-for-sale, Number of Securities | Security | 16 | 27
SBA loan pool securities [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 161 | $ 155
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 50,499 | $ 85,062
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 12 | 15
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 250 | $ 433
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 7,036 | $ 11,975
Available-for-sale, 12 Months or More, Number of Securities | Security | 3 | 4
Available-for-sale, Gross Unrealized Loss | $ 411 | $ 588
Available-for-sale, Estimated Fair Value | $ 57,535 | $ 97,037
Available-for-sale, Number of Securities | Security | 15 | 19
Corporate bonds [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 24 | $ 4
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 4,994 | $ 5,021
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 1 | 1
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 0 | $ 68
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 0 | $ 7,925
Available-for-sale, 12 Months or More, Number of Securities | Security | 0 | 2
Available-for-sale, Gross Unrealized Loss | $ 24 | $ 72
Available-for-sale, Estimated Fair Value | $ 4,994 | $ 12,946
Available-for-sale, Number of Securities | Security | 1 | 3
Other securities [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss | $ 66 | $ 0
Available-for-sale, Less Than 12 Months, Estimated Fair Value | $ 21,820 | $ 0
Available-for-sale, Less Than 12 Months, Number of Securities | Security | 3 | 0
Available-for-sale, 12 Months or More, Gross Unrealized Loss | $ 97 | $ 80
Available-for-sale, 12 Months or More, Estimated Fair Value | $ 928 | $ 1,945
Available-for-sale, 12 Months or More, Number of Securities | Security | 3 | 4
Available-for-sale, Gross Unrealized Loss | $ 163 | $ 80
Available-for-sale, Estimated Fair Value | $ 22,748 | $ 1,945
Available-for-sale, Number of Securities | Security | 6 | 4
Equity securities [Member] |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-sale, Less Than 12 Months, Gross Unrealized Loss |  | $ 36
Available-for-sale, Less Than 12 Months, Estimated Fair Value |  | $ 214
Available-for-sale, Less Than 12 Months, Number of Securities | Security |  | 1
Available-for-sale, 12 Months or More, Gross Unrealized Loss |  | $ 0
Available-for-sale, 12 Months or More, Estimated Fair Value |  | $ 0
Available-for-sale, 12 Months or More, Number of Securities | Security |  | 0
Available-for-sale, Gross Unrealized Loss |  | $ 36
Available-for-sale, Estimated Fair Value |  | $ 214
Available-for-sale, Number of Securities | Security |  | 1

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