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SECURITIES: (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | $ 1,344,790 | $ 977,830
Unrealized Gains | 30,126 | 43,354
Unrealized Losses | (10,182) | (440)
Fair Value | 1,364,734 | 1,020,744
U.S. Government entity mortgage-backed securities |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 118,176 | 92,710
Unrealized Gains | 2,688 | 5,105
Unrealized Losses | (741) | (1)
Fair Value | 120,123 | 97,814
Mortgage-backed securities, residential |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 628,920 | 346,606
Unrealized Gains | 4,387 | 8,794
Unrealized Losses | (6,879) | (279)
Fair Value | 626,428 | 355,121
Mortgage-backed securities, commercial |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 15,480 | 17,931
Unrealized Gains | 191 | 559
Unrealized Losses | 0 | 0
Fair Value | 15,671 | 18,490
Collateralized mortgage obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 175,501 | 209,556
Unrealized Gains | 1,272 | 4,761
Unrealized Losses | (1,768) | (157)
Fair Value | 175,005 | 214,160
State and municipal obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 362,843 | 285,837
Unrealized Gains | 17,833 | 20,294
Unrealized Losses | (578) | 0
Fair Value | 380,098 | 306,131
Municipal taxable |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 38,445 | 22,440
Unrealized Gains | 396 | 702
Unrealized Losses | (215) | (3)
Fair Value | 38,626 | 23,139
U.S. Treasury |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 205 | 2,750
Unrealized Gains | 0 | 3
Unrealized Losses | (1) | 0
Fair Value | 204 | 2,753
Collateralized debt obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 0 | 0
Unrealized Gains | 3,359 | 3,136
Unrealized Losses | 0 | 0
Fair Value | 3,359 | $ 3,136
Other securities |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 5,220 |
Unrealized Gains | 0 |
Unrealized Losses | 0 |
Fair Value | $ 5,220 |

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