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v3.23.2

Other Comprehensive (Loss) Income (Components of AOCI) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | $ 1,640,080 | $ 1,621,131 | $ 1,597,703 | $ 1,697,096
Current - period other comprehensive (loss) | (14,347) | (43,853) | 2,552 | (118,662)
Ending Balance | 1,642,471 | 1,585,265 | 1,642,471 | 1,585,265
Accumulated Other Comprehensive Loss |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | (148,146) | (67,946) | (165,045) | 6,863
Current - period other comprehensive (loss) | (14,347) | (43,853) | 2,552 | (118,662)
Ending Balance | (162,493) | (111,799) | (162,493) | (111,799)
Unrealized Losses on Available for Sale Debt Securities |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | (165,750) | (85,182) | (186,614) | (211)
Current - period other comprehensive (loss) | (14,726) | (45,775) | 6,138 | (130,746)
Ending Balance | (180,476) | (130,957) | (180,476) | (130,957)
Post- Retirement Obligations |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | 1,303 | 2,705 | 1,572 | 2,981
Current - period other comprehensive (loss) | (261) | (236) | (530) | (512)
Ending Balance | 1,042 | 2,469 | 1,042 | 2,469
Unrealized Gains on Derivatives (cash flow hedges) |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | 16,301 | 14,531 | 19,997 | 4,093
Current - period other comprehensive (loss) | 640 | 2,158 | (3,056) | 12,596
Ending Balance | $ 16,941 | $ 16,689 | $ 16,941 | $ 16,689

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