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INVESTMENT SECURITIES - Summary of Securities Available For Sale With Unrealized Losses (Detail) $ in Thousands | Dec. 31, 2020 USD ($) securities | Dec. 31, 2019 USD ($) securities
--- | --- | ---
Number of Securities |  |
Less Than 12 Months | securities | 7 | 22
12 Months or More | securities | 25 | 18
Total | securities | 32 | 40
Fair Value |  |
Less Than 12 Months | $ 54,268 | $ 178,686
12 Months or More | 225,564 | 172,727
Total | 279,832 | 351,413
Unrealized Losses |  |
Less Than 12 Months | 2,893 | 1,676
12 Months or More | 3,695 | 4,513
Total | $ 6,588 | $ 6,189
States and political subdivisions |  |
Number of Securities |  |
Less Than 12 Months | securities | 1 | 1
12 Months or More | securities | 0 | 0
Total | securities | 1 | 1
Fair Value |  |
Less Than 12 Months | $ 9,079 | $ 6,173
12 Months or More | 0 | 0
Total | 9,079 | 6,173
Unrealized Losses |  |
Less Than 12 Months | 1,125 | 32
12 Months or More | 0 | 0
Total | $ 1,125 | $ 32
GSE residential CMOs |  |
Number of Securities |  |
Less Than 12 Months | securities | 3 | 5
12 Months or More | securities | 0 | 1
Total | securities | 3 | 6
Fair Value |  |
Less Than 12 Months | $ 23,954 | $ 37,158
12 Months or More | 0 | 11,602
Total | 23,954 | 48,760
Unrealized Losses |  |
Less Than 12 Months | 1,071 | 309
12 Months or More | 0 | 465
Total | $ 1,071 | $ 774
Non-agency CMOs |  |
Number of Securities |  |
Less Than 12 Months | securities |  | 1
12 Months or More | securities |  | 0
Total | securities |  | 1
Fair Value |  |
Less Than 12 Months |  | $ 17,087
12 Months or More |  | 0
Total |  | 17,087
Unrealized Losses |  |
Less Than 12 Months |  | 123
12 Months or More |  | 0
Total |  | $ 123
Private label commercial CMOs |  |
Number of Securities |  |
Less Than 12 Months | securities | 1 | 6
12 Months or More | securities | 10 | 8
Total | securities | 11 | 14
Fair Value |  |
Less Than 12 Months | $ 4,314 | $ 26,079
12 Months or More | 42,403 | 39,726
Total | 46,717 | 65,805
Unrealized Losses |  |
Less Than 12 Months | 685 | 67
12 Months or More | 1,077 | 164
Total | $ 1,762 | $ 231
Asset-backed |  |
Number of Securities |  |
Less Than 12 Months | securities | 2 | 9
12 Months or More | securities | 15 | 9
Total | securities | 17 | 18
Fair Value |  |
Less Than 12 Months | $ 16,921 | $ 92,189
12 Months or More | 183,161 | 121,399
Total | 200,082 | 213,588
Unrealized Losses |  |
Less Than 12 Months | 12 | 1,145
12 Months or More | 2,618 | 3,884
Total | $ 2,630 | $ 5,029

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