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Acquisition and Divestiture Activity (Details) $ / shares in Units, $ in Thousands	Apr. 01, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business Acquisition [Line Items]
Assets		$ 49,534,918	$ 49,089,836
Total loans		33,623,319	32,991,927
Deposits		$ 37,699,418	$ 37,235,180
CapStar Financial Holdings, Inc. | Subsequent Event
Business Acquisition [Line Items]
Shares exchange ratio	1.155
Value of issuance common stock shares	$ 418,000
Share price (in dollars per share) | $ / shares	$ 17.41
CapStar Financial Holdings, Inc. | CapStar Financial Holdings, Inc. | Subsequent Event
Business Acquisition [Line Items]
Assets	$ 3,000,000
Total loans	2,300,000
Deposits	$ 2,600,000

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