Renasant Corporation (Parent Company Only) Condensed Financial Information (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income
Other dividends									$ 459	$ 215	$ 396
Total income	$ 30,071	$ 38,272	$ 35,586	$ 33,302	$ 31,442	$ 32,079	$ 22,879	$ 21,870	137,415	108,270	80,509
Expenses	7,791	7,301	6,851	6,205	5,437	5,688	5,155	5,385	28,147	21,665	23,927
Income before income tax benefit and equity in undistributed net income of bank subsidiary	35,096	34,885	34,054	31,742	31,309	23,962	22,236	22,257	135,777	99,764	85,887
Income tax benefit	11,461	11,706	11,154	10,526	10,149	7,742	6,842	7,017	44,847	31,750	26,305
Net income	$ 23,635	$ 23,179	$ 22,900	$ 21,216	$ 21,160	$ 16,220	$ 15,394	$ 15,240	90,930	68,014	59,582
Renasant Corporation
Income
Dividends from bank subsidiary									29,733	24,557	21,518
Interest income from bank subsidiary									8	7	8
Other dividends									469	266	749
Other income									1,275	58	71
Total income									31,485	24,888	22,346
Expenses									9,036	6,823	5,513
Income before income tax benefit and equity in undistributed net income of bank subsidiary									22,449	18,065	16,833
Income tax benefit									(2,890)	(2,521)	(1,846)
Equity in undistributed net income of bank subsidiary									65,591	47,428	40,903
Net income									$ 90,930	$ 68,014	$ 59,582