Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Narrative (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Derivative (liabilities), at fair value, net	$ (7,900,000)	$ (23,000,000)
Disposal Group, Held-for-sale, Not Discontinued Operations
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	0
Unused lines of Credit
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	899,200,000	894,500,000
Mortgages
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	0
Letter of Credit
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	12,900,000	$ 9,400,000
Letter of Credit | New Jersey Governmental Unit Deposit Protection Act
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	$ 600,000