Renasant Corporation (Parent Company Only) Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 1,092,032	$ 801,351
Accrued interest receivable on bank balances	54,395	54,804
Other assets	300,003	304,484
Total assets	18,034,868	17,360,535	$ 16,988,176
Liabilities and shareholders’ equity
Other liabilities	245,306	249,390
Shareholders’ equity	2,678,318	2,297,383	$ 2,136,016	$ 2,209,853
Total liabilities and shareholders’ equity	18,034,868	17,360,535
Renasant Corporation
Assets
Cash and cash equivalents	405,782	169,597
Investment in bank subsidiary	2,694,503	2,541,195
Accrued interest receivable on bank balances	27	27
Other assets	30,726	37,268
Total assets	3,131,038	2,748,087
Liabilities and shareholders’ equity
Junior subordinated debentures	113,916	112,978
Subordinated notes	316,698	316,422
Other liabilities	22,106	21,304
Shareholders’ equity	2,678,318	2,297,383
Total liabilities and shareholders’ equity	3,131,038	2,748,087
Cash collateral	$ 2,092	$ 1,987