Renasant Corporation (Parent Company Only) Condensed Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income	$ 15,597	$ 15,535	$ 14,853	$ 13,597	$ 11,260	$ 6,637	$ 8,019	$ 7,571	$ 59,582	$ 33,487	$ 26,637
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of securities									(375)	(54)	(1,894)
Decrease (increase) in other assets									21,303	73,733	84,344
Increase (decrease) in other liabilities									(5,437)	3,137	4,273
Net cash provided by operating activities									124,683	153,286	177,710
Investing activities
Net cash received in acquisition									0	170,005	0
Other investing activities									(64)	0	0
Net cash used in investing activities									(202,802)	(57,150)	(196,824)
Financing activities
Cash paid for dividends									(21,518)	(19,303)	(17,117)
Excess tax (expense) benefits from exercise of stock options									1,102	290	(56)
Net cash (used in) provided by financing activities									(6,946)	18,092	(57,483)
Net (decrease) increase in cash and cash equivalents									(85,065)	114,228	(76,597)
Cash and cash equivalents at beginning of year				246,648				132,420	246,648	132,420	209,017
Cash and cash equivalents at end of year	161,583				246,648				161,583	246,648	132,420
Renasant Corporation
Operating activities
Net income									59,582	33,487	26,637
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of securities									(375)	0	0
Equity in undistributed net income of bank subsidiary									(40,903)	(16,183)	(10,398)
Amortization/depreciation/accretion									385	21	(161)
Decrease (increase) in other assets									1,345	1,969	(418)
Increase (decrease) in other liabilities									2,591	(122)	2,139
Net cash provided by operating activities									22,625	19,172	17,799
Investing activities
Purchases of securities held to maturity and available for sale									(1,781)	(1,420)	(3,515)
Sales and maturities of securities held to maturity and available for sale									1,142	3,000	0
Net cash received in acquisition									0	3,917	0
Net cash used in investing activities									(703)	5,497	(3,515)
Financing activities
Cash paid for dividends									(21,518)	(19,303)	(17,117)
Cash received on exercise of stock-based compensation									401	276	548
Excess tax (expense) benefits from exercise of stock options									940	198	(56)
(Repayments of) proceeds from advances from bank subsidiary									(1,500)	0	1,500
Net cash (used in) provided by financing activities									(21,677)	(18,829)	(15,125)
Net (decrease) increase in cash and cash equivalents									245	5,840	(841)
Cash and cash equivalents at beginning of year				9,723				3,883	9,723	3,883	4,724
Cash and cash equivalents at end of year	$ 9,968				$ 9,723				$ 9,968	$ 9,723	$ 3,883