Derivative and Balance Sheet Offsetting - Fair value of derivatives & classifications table (Details) - Not Designated as Hedging Instrument - Interest Rate Contracts - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 24,257	$ 46,184
Other Assets | Interest Rate Lock Commitments
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	356	1,096
Other Assets | Forward sales contracts
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Other Assets | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	24,257	46,184
Other Liabilities
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	24,257	46,637
Other Liabilities | Interest Rate Lock Commitments
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	0
Other Liabilities | Forward sales contracts
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	27	165
Other Liabilities | Interest Rate Swap
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 24,257	$ 46,637