Renasant Corporation (Parent Company Only) Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 801,351	$ 575,992
Accrued interest receivable on bank balances	54,804	49,850
Other assets	304,484	298,385
Total assets	17,360,535	16,988,176	$ 16,810,311
Liabilities and shareholders’ equity
Other liabilities	249,390	224,829
Shareholders’ equity	2,297,383	2,136,016	$ 2,209,853	$ 2,132,733
Total liabilities and shareholders’ equity	17,360,535	16,988,176
Renasant Corporation
Assets
Cash and cash equivalents	169,597	167,727
Investments	0	0
Investment in bank subsidiary	2,541,195	2,391,721
Accrued interest receivable on bank balances	27	3
Other assets	37,268	28,468
Total assets	2,748,087	2,587,919
Liabilities and shareholders’ equity
Junior subordinated debentures	112,978	112,042
Subordinated notes	316,422	316,091
Other liabilities	21,304	23,770
Shareholders’ equity	2,297,383	2,136,016
Total liabilities and shareholders’ equity	2,748,087	2,587,919
Cash collateral	$ 1,987	$ 1,889