Employee Benefit and Deferred Compensation Plans - (Details) - Pension Benefits - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Change in benefit obligation
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	304	$ 275	912	$ 820
HeritageBank
Change in benefit obligation
Benefit obligation at beginning of year			12,913
Service cost			0
Interest cost			172
Actuarial loss (gain)			(481)
Annuity benefits paid			(22)
Settlements (lump sum benefits paid)			(11,510)
Transfer to legacy Renasant defined benefit pension plan			(1,072)
Benefit obligation after final distribution	0		0
Change in plan assets
Fair value of plan assets at beginning of year			12,458
Actual return on plan assets			29
Employer contribution			142
Expenses paid from plan trust			(25)
Annuity benefits paid			(22)
Settlements (lump sum benefits paid)			(11,510)
Transfer to legacy Renasant defined benefit pension plan			(1,072)
Fair value of plan assets after final distribution	$ 0		$ 12,458