Loans - Schedule of composition of loan portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 7,141,891	$ 6,871,122
Financing Receivable, Allowance for Credit Loss	(85,379)	(83,197)	$ (85,675)	$ (56,679)
Net loans	7,056,512	6,787,925
PPP loans receivable
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,206	74,420
Bank Overdrafts
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,489	1,127
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,794,054	1,801,792
Financing Receivable, Allowance for Credit Loss	(17,829)	(25,466)	(23,480)	(10,229)
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	208,982	214,561
Construction Real Estate Retail
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	116,433	107,225
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	550,183	533,802
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,075,446	1,033,658
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	167,151	165,605
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,091	5,642
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,904,981	1,689,679
Financing Receivable, Allowance for Credit Loss	(28,021)	(26,286)	(17,418)	(12,211)
Finance Leases Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	19,637	20,532
Financing Receivable, Allowance for Credit Loss	(161)	(238)	$ (518)	$ (115)
GFSC loans
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	274	1,793
Check Loans
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,150	2,093
consumer less GFSC and check loans
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,902,557	1,685,793
commercial financial agricultural less PPP and overdraft
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 1,295,238	$ 1,223,079