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Securities - Unrealized Loss Positions (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 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 | 46 | 194
Greater than 12 months in an unrealized loss position | security | 392 | 299
Total | 438 | 493
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 2,338,000 | $ 27,304,000
Greater than 12 months in an unrealized loss position | 104,570,000 | 96,526,000
Total | 106,908,000 | 123,830,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 132,476,000 | 579,571,000
Greater than 12 months in an unrealized loss position | 1,218,935,000 | 906,689,000
Total | $ 1,351,411,000 | $ 1,486,260,000
Effective duration (in years) | 3 years 2 months 12 days |
Credit losses were determined | $ 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 | 4
Total | 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 | $ 9,461,000 | 10,900,000
Total | 9,461,000 | 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 | 214,734,000 | 188,008,000
Total | $ 214,734,000 | $ 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
Total | 9 | 9
Securities Available-for-Sale, Unrealized Losses |  |
Greater than 12 months in an unrealized loss position | $ 4,249,000 | $ 5,130,000
Total | 4,249,000 | 5,130,000
Securities Available-for-Sale, Fair Value |  |
Greater than 12 months in an unrealized loss position | 56,703,000 | 56,048,000
Total | $ 56,703,000 | $ 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 | 15
Greater than 12 months in an unrealized loss position | security | 127 | 117
Total | 130 | 132
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 143,000 | $ 975,000
Greater than 12 months in an unrealized loss position | 13,423,000 | 14,623,000
Total | 13,566,000 | 15,598,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 2,235,000 | 11,369,000
Greater than 12 months in an unrealized loss position | 119,703,000 | 113,621,000
Total | $ 121,938,000 | $ 124,990,000
States and political subdivisions |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 14 | 45
Greater than 12 months in an unrealized loss position | security | 24 | 15
Total | 38 | 60
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 434,000 | $ 5,800,000
Greater than 12 months in an unrealized loss position | 10,520,000 | 8,434,000
Total | 10,954,000 | 14,234,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 47,760,000 | 128,770,000
Greater than 12 months in an unrealized loss position | 82,401,000 | 48,877,000
Total | $ 130,161,000 | $ 177,647,000
Corporate bonds |  |
Securities Available-for-Sale, Number of Securities |  |
Greater than 12 months in an unrealized loss position | security | 2 | 2
Total | 2 | 2
Securities Available-for-Sale, Unrealized Losses |  |
Greater than 12 months in an unrealized loss position | $ 238,000 | $ 378,000
Total | 238,000 | 378,000
Securities Available-for-Sale, Fair Value |  |
Greater than 12 months in an unrealized loss position | 9,762,000 | 9,622,000
Total | $ 9,762,000 | $ 9,622,000
Collateralized mortgage obligations |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 13 | 80
Greater than 12 months in an unrealized loss position | security | 157 | 120
Total | 170 | 200
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 794,000 | $ 12,895,000
Greater than 12 months in an unrealized loss position | 56,092,000 | 49,674,000
Total | 56,886,000 | 62,569,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 23,540,000 | 180,624,000
Greater than 12 months in an unrealized loss position | 430,566,000 | 348,880,000
Total | $ 454,106,000 | $ 529,504,000
Asset-backed Securities |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 11 | 30
Greater than 12 months in an unrealized loss position | security | 39 | 21
Total | 50 | 51
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 745,000 | $ 3,030,000
Greater than 12 months in an unrealized loss position | 6,472,000 | 5,436,000
Total | 7,217,000 | 8,466,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 45,309,000 | 121,915,000
Greater than 12 months in an unrealized loss position | 144,132,000 | 79,659,000
Total | $ 189,441,000 | $ 201,574,000
Collateralized loan obligations. |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 5 | 23
Greater than 12 months in an unrealized loss position | security | 29 | 11
Total | 34 | 34
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 222,000 | $ 3,579,000
Greater than 12 months in an unrealized loss position | 4,115,000 | 1,951,000
Total | 4,337,000 | 5,530,000
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 13,632,000 | 112,772,000
Greater than 12 months in an unrealized loss position | 160,934,000 | 61,974,000
Total | $ 174,566,000 | $ 174,746,000

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