Derivative Instruments and Hedging Activities - Value of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets
Derivatives (included in Other Assets)
Fair value	$ 33,528	$ 78,319
Other Assets | Interest Rate Swap Contracts—Commercial Loans
Derivatives (included in Other Assets)
Fair value	33,528	78,319
Notional amount	1,017,178	983,638
Collateral posted	0	0
Other Assets | Interest Rate Lock Commitments—Mortgage Loans
Derivatives (included in Other Assets)
Fair value	401	2,900
Notional amount	12,148	51,053
Other Assets | Forward Sale Contracts—Mortgage Loans
Derivatives (included in Other Assets)
Fair value	4	0
Notional amount	8,436	0
Other Liabilities
Derivatives (included in Other Liabilities)
Fair value	33,631	79,033
Other Liabilities | Interest Rate Swap Contracts—Commercial Loans
Derivatives (included in Other Liabilities)
Fair value	33,631	79,033
Notional amount	1,017,178	983,638
Collateral posted	37,360	77,930
Other Liabilities | Interest Rate Lock Commitments—Mortgage Loans
Derivatives (included in Other Liabilities)
Fair value	0	0
Notional amount	0	0
Other Liabilities | Forward Sale Contracts—Mortgage Loans
Derivatives (included in Other Liabilities)
Fair value	0	385
Notional amount	$ 0	$ 47,062