Allowance for Credit Losses - Amortized Cost Basis of Revolving Loans that Were Converted to Term Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	$ 21,851	$ 54,817
Commercial and Industrial
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	1,153	35,760
Home equity Line
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	3,656	13,569
Consumer
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	1,574	4,882
Residential Mortgage.
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	577	296
Commercial real estate
Credit quality
Total Revolving Loans Converted to Term Loans During the Period	$ 14,891	$ 310