LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES Loans Past Due - Pre Adoption (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for loan losses
Total loans	$ 6,825,847	$ 8,081,519
Past Due 90 Days or Greater and Accruing	3,271	11,450
Commercial and industrial loans
Allowance for loan losses
Total loans	1,284,429	1,943,164
Past Due 90 Days or Greater and Accruing	89	541
Consumer loans | Home equity
Allowance for loan losses
Total loans	252,366	293,981
Past Due 90 Days or Greater and Accruing	257	243
30-59 Days Past Due
Allowance for loan losses
Total loans	35,352	8,561
30-59 Days Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans	2,700	3,016
30-59 Days Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	258	244
60-89 Days Past Due
Allowance for loan losses
Total loans	4,511	7,749
60-89 Days Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans	709	3,259
60-89 Days Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	108	284
90 Days or Greater Past Due
Allowance for loan losses
Total loans	38,597	76,398
90 Days or Greater Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans	6,836	12,982
90 Days or Greater Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	$ 2,158	$ 2,897