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Loans - Summary of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Summary of Loans
Total loans	$ 23,928,166	$ 24,664,134
Less allowance for credit losses	(301,807)	(457,309)
Loans, net	23,626,359	24,206,825
Deferred fees costs	15,900	35,600
Unamortized Discounts	68,000	97,700
Accrued interest receivable (AIR)	70,600	93,900
Acquired credit impaired loans
Summary of Loans
Total loans		361,846
Construction and land development | Acquired credit impaired loans
Summary of Loans
Total loans		25,032
Commercial and industrial | Acquired credit impaired loans
Summary of Loans
Total loans		7,029
Consumer loans | Acquired credit impaired loans
Summary of Loans
Total loans		35,488
Commercial loans | Construction and land development
Summary of Loans
Total loans	2,029,216	1,890,846
Commercial loans | Commercial non-owner occupied
Summary of Loans
Total loans	6,735,699	6,152,246
Commercial loans | Commercial non-owner occupied real estate
Summary of Loans
Total loans	4,970,116	4,832,697
Commercial loans | Real estate | Acquired credit impaired loans
Summary of Loans
Total loans		130,938
Commercial loans | Commercial and industrial
Summary of Loans
Total loans	3,761,133	5,046,310
Commercial loans | Other income producing property
Summary of Loans
Total loans	696,804	854,900
Consumer portfolio loans | Consumer Owner Occupied Loans
Summary of Loans
Total loans	3,638,364	3,682,667
Consumer portfolio loans | Home equity loans
Summary of Loans
Total loans	1,168,594	1,292,141
Consumer portfolio loans | Real estate | Acquired credit impaired loans
Summary of Loans
Total loans		163,359
Consumer portfolio loans | Consumer loans
Summary of Loans
Total loans	904,657	894,334
Consumer portfolio loans | Other loans
Summary of Loans
Total loans	$ 23,583	$ 17,993

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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