Basis of Presentation - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) method channel branch	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 15, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of full-service branches | branch	82
Provision for credit losses on available-for-sale securities	$ 0	$ 0
Transfer from loans held for sale to loan portfolio	24,479,000	86,315,000	$ 55,766,000
Transfer of from loan portfolio to held for sale	$ 46,364,000	10,408,000	11,483,000
Percent of remaining principal allowed to buy back under GNMA optional repurchase programs	10000.00%
Repurchase of loans held for investment	$ 20,593,000	40,417,000	10,586,000
Goodwill impairment	0	0
Amounts related to uncertain tax positions	0	0	0
Impairment of long-lived assets	$ 0	0
Number of methods to deliver mortgage loans | method	2
Deposits with Federal Home Loan Banks	$ 19,737,000	17,130,000
FHLB lender risk account guaranty	$ 9,558,000	8,372,000
Lender risk account, contribution percentage	1
Lender risk account, period to release portion of funds not used to cover losses	30 years
Lender risk account, initial fill-up period	5 years
Number of distinct delivery channels | channel	2
Mortgage
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre tax restructuring charges	$ 12,458,000
FHLB Cincinnati
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deposits with Federal Home Loan Banks	$ 19,737,000
Premises
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	40 years
Furniture, fixtures and equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	3 years
Furniture, fixtures and equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	10 years
Leasehold improvements
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	10 years
Franklin Financial Network, Inc.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Non-strategic loans assumed in acquisition	$ 30,490,000	79,299,000		$ 326,206,000
Assets held-for-sale, gain (loss) from change in fair value	(5,133,000)	11,172,000	3,228,000
Residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Transfer of from loan portfolio to held for sale	0	1,188,000	2,116,000
Residential Mortgage Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Transfer from loans held for sale to loan portfolio	24,479,000	86,315,000	55,766,000
GNMA
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Transfer of from loan portfolio to held for sale	46,364,000	9,220,000	$ 9,367,000
Delinquent GNMA loans that had been previously sold	$ 26,211,000	$ 91,924,000