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Securities - Unrealized Loss Positions (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) security | Jun. 30, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 42 | 42 | 194
Greater than 12 months in an unrealized loss position | security | 377 | 377 | 299
Total | 419 | 419 | 493
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 2,280,000 | $ 2,280,000 | $ 27,304,000
Greater than 12 months in an unrealized loss position | 110,665,000 | 110,665,000 | 96,526,000
Total | 112,945,000 | 112,945,000 | 123,830,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 134,669,000 | 134,669,000 | 579,571,000
Greater than 12 months in an unrealized loss position | 1,147,955,000 | 1,147,955,000 | 906,689,000
Total | 1,282,624,000 | $ 1,282,624,000 | $ 1,486,260,000
Effective duration (in years) |  | 3 years |
Credit losses were determined | 0 | $ 0 |
Provision for credit losses on securities | $ 0 |  |
U.S. Treasury |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security |  |  | 1
Greater than 12 months in an unrealized loss position | security | 5 | 5 | 4
Total | 5 | 5 | 5
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position |  |  | $ 1,025,000
Greater than 12 months in an unrealized loss position | $ 9,724,000 | $ 9,724,000 | 10,900,000
Total | 9,724,000 | 9,724,000 | 11,925,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position |  |  | 24,121,000
Greater than 12 months in an unrealized loss position | 214,613,000 | 214,613,000 | 188,008,000
Total | $ 214,613,000 | $ 214,613,000 | $ 212,129,000
U.S. government agencies |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Greater than 12 months in an unrealized loss position | security | 9 | 9 | 9
Total | 9 | 9 | 9
Securities Available-for-Sale, Unrealized Losses |  |  |
Greater than 12 months in an unrealized loss position | $ 4,612,000 | $ 4,612,000 | $ 5,130,000
Total | 4,612,000 | 4,612,000 | 5,130,000
Securities Available-for-Sale, Fair Value |  |  |
Greater than 12 months in an unrealized loss position | 55,981,000 | 55,981,000 | 56,048,000
Total | $ 55,981,000 | $ 55,981,000 | $ 56,048,000
Mortgage Backed Securities, Issued by US Government Agencies |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 3 | 3 | 15
Greater than 12 months in an unrealized loss position | security | 127 | 127 | 117
Total | 130 | 130 | 132
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 177,000 | $ 177,000 | $ 975,000
Greater than 12 months in an unrealized loss position | 14,656,000 | 14,656,000 | 14,623,000
Total | 14,833,000 | 14,833,000 | 15,598,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 2,188,000 | 2,188,000 | 11,369,000
Greater than 12 months in an unrealized loss position | 112,952,000 | 112,952,000 | 113,621,000
Total | $ 115,140,000 | $ 115,140,000 | $ 124,990,000
States and political subdivisions |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 31 | 31 | 45
Greater than 12 months in an unrealized loss position | security | 26 | 26 | 15
Total | 57 | 57 | 60
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 1,178,000 | $ 1,178,000 | $ 5,800,000
Greater than 12 months in an unrealized loss position | 11,609,000 | 11,609,000 | 8,434,000
Total | 12,787,000 | 12,787,000 | 14,234,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 92,606,000 | 92,606,000 | 128,770,000
Greater than 12 months in an unrealized loss position | 83,930,000 | 83,930,000 | 48,877,000
Total | $ 176,536,000 | $ 176,536,000 | $ 177,647,000
Corporate bonds |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Greater than 12 months in an unrealized loss position | security | 1 | 1 | 2
Total | 1 | 1 | 2
Securities Available-for-Sale, Unrealized Losses |  |  |
Greater than 12 months in an unrealized loss position | $ 118,000 | $ 118,000 | $ 378,000
Total | 118,000 | 118,000 | 378,000
Securities Available-for-Sale, Fair Value |  |  |
Greater than 12 months in an unrealized loss position | 4,882,000 | 4,882,000 | 9,622,000
Total | $ 4,882,000 | $ 4,882,000 | $ 9,622,000
Collateralized mortgage obligations |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 3 | 3 | 80
Greater than 12 months in an unrealized loss position | security | 149 | 149 | 120
Total | 152 | 152 | 200
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 381,000 | $ 381,000 | $ 12,895,000
Greater than 12 months in an unrealized loss position | 60,153,000 | 60,153,000 | 49,674,000
Total | 60,534,000 | 60,534,000 | 62,569,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 7,817,000 | 7,817,000 | 180,624,000
Greater than 12 months in an unrealized loss position | 399,678,000 | 399,678,000 | 348,880,000
Total | $ 407,495,000 | $ 407,495,000 | $ 529,504,000
Asset-backed Securities |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 4 | 4 | 30
Greater than 12 months in an unrealized loss position | security | 27 | 27 | 21
Total | 31 | 31 | 51
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 536,000 | $ 536,000 | $ 3,030,000
Greater than 12 months in an unrealized loss position | 5,936,000 | 5,936,000 | 5,436,000
Total | 6,472,000 | 6,472,000 | 8,466,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 29,088,000 | 29,088,000 | 121,915,000
Greater than 12 months in an unrealized loss position | 105,231,000 | 105,231,000 | 79,659,000
Total | $ 134,319,000 | $ 134,319,000 | $ 201,574,000
Collateralized loan obligations. |  |  |
Securities Available-for-Sale, Number of Securities |  |  |
Less than 12 months in an unrealized loss position | security | 1 | 1 | 23
Greater than 12 months in an unrealized loss position | security | 33 | 33 | 11
Total | 34 | 34 | 34
Securities Available-for-Sale, Unrealized Losses |  |  |
Less than 12 months in an unrealized loss position | $ 8,000 | $ 8,000 | $ 3,579,000
Greater than 12 months in an unrealized loss position | 3,857,000 | 3,857,000 | 1,951,000
Total | 3,865,000 | 3,865,000 | 5,530,000
Securities Available-for-Sale, Fair Value |  |  |
Less than 12 months in an unrealized loss position | 2,970,000 | 2,970,000 | 112,772,000
Greater than 12 months in an unrealized loss position | 170,688,000 | 170,688,000 | 61,974,000
Total | $ 173,658,000 | $ 173,658,000 | $ 174,746,000

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