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Premises and Equipment - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]      
Depreciation and amortization $ 37,000 $ 35,400 $ 34,700
Gain (loss) on disposal of property and equipment (300) (1,700) (4,600)
Proceeds from sale of property and equipment 4,337 6,769 6,894
Premises and equipment, net 432,035 406,963  
Manchester Property      
Property, Plant and Equipment [Line Items]      
Gain (loss) on disposal of property and equipment   900 (700)
Proceeds from sale of property and equipment   1,600  
Premises and equipment, net   700  
Yonkers Property      
Property, Plant and Equipment [Line Items]      
Transfers from (to) property and equipment   800 4,800
Write-downs   400  
Proceeds from sale of property and equipment   700 4,100
Costs to sell   100  
Disposal Group, Held-for-Sale, Not Discontinued Operations      
Property, Plant and Equipment [Line Items]      
Gain (loss) on disposal of property and equipment (1,200) 400 1,100
Carrying amount of assets held for disposition 1,800 5,100  
Transfers from (to) property and equipment 3,200 5,600 5,100
Write-downs 1,000 (300) 100
Proceeds from sale of property and equipment $ 4,300 $ 4,400 $ 2,700