Summary of Significant Accounting Policies (Detail) $ in Thousands	Mar. 31, 2017 USD ($) State	Dec. 31, 2016 USD ($)
Schedule Of Significant Accounting Policies
Maximum loss exposure related to unconsolidated VIE's | $	$ 92,000	$ 91,000
Other assets | $	$ 656,911	$ 651,229
IBERIABANK Corporation
Schedule Of Significant Accounting Policies
Number of operating states | State	8
IMC
Schedule Of Significant Accounting Policies
Number of operating states | State	10