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v3.25.3

Accumulated Other Comprehensive (Loss) Income - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | $ 3,329,246 | $ 3,101,609 | $ 3,197,325 | $ 2,760,139
OCI before reclassifications | 38,317 | 61,936 | 44,537 | 37,625
Amounts reclassified from AOCI | 4,480 | 3,874 | 11,740 | 27,141
Ending Balance | 3,413,598 | 3,203,943 | 3,413,598 | 3,203,943
Unrealized Gains (Losses) on Investment Securities |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | (268,905) | (287,248) | (275,989) | (274,862)
OCI before reclassifications | 38,606 | 68,560 | 43,018 | 37,696
Amounts reclassified from AOCI | 0 | 1 | 2 | 15,689
Ending Balance | (228,969) | (217,265) | (228,969) | (217,265)
Net Unrealized Gain (Loss) on Interest Rate Derivatives used in Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | (6,774) | (20,440) | (16,052) | (34,783)
OCI before reclassifications | (289) | (6,624) | 1,519 | (71)
Amounts reclassified from AOCI | 4,586 | 3,979 | 12,056 | 11,769
Ending Balance | (2,477) | (23,085) | (2,477) | (23,085)
Unrecognized Pension and Postretirement Plan Income (Costs) |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | 4,010 | (2,846) | 4,222 | (2,635)
OCI before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI | (106) | (106) | (318) | (317)
Ending Balance | 3,904 | (2,952) | 3,904 | (2,952)
Total |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | (271,669) | (310,534) | (287,819) | (312,280)
Ending Balance | (227,542) | (243,302) | (227,542) | (243,302)
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Amounts reclassified from AOCI | 1,330 | 1,422 | 4,000 | 4,212
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investment Securities |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Amounts reclassified from AOCI | 1,330 | 1,422 | 4,000 | 4,212
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gain (Loss) on Interest Rate Derivatives used in Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Amounts reclassified from AOCI | 0 | 0 | 0 | 0
Reclassification out of Accumulated Other Comprehensive Income | Unrecognized Pension and Postretirement Plan Income (Costs) |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Amounts reclassified from AOCI | $ 0 | $ 0 | $ 0 | $ 0

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