Shareholders' Equity, Capital Ratios and Other Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule of Preferred Stock

The following table presents a summary of the Company's non-cumulative perpetual preferred stock at December 31:

							2017		2016
	Issuance Date	Earliest Redemption Date	Annual Dividend Rate		Liquidation Amount		Carrying Amount		Carrying Amount
(Dollars in thousands)
Series B Preferred Stock	8/5/2015	8/1/2025	6.625	%	$	80,000	$	76,812	$	76,812
Series C Preferred Stock	5/9/2016	5/1/2026	6.600	%	57,500		55,285		55,285
					$	137,500	$	132,097	$	132,097

Actual Capital Amounts and Ratios

The Company’s and IBERIABANK’s actual capital amounts and ratios as of December 31 are presented in the following table.

(Dollars in thousands)	2017
	Minimum				Well-Capitalized			Actual
	Amount		Ratio		Amount		Ratio	Amount		Ratio
Tier 1 Leverage
Consolidated	$	1,073,381	4.00	%	N/A		N/A	$	2,509,496	9.35	%
IBERIABANK	1,070,789		4.00		$	1,338,487	5.00	2,437,275		9.10
Common Equity Tier 1 (CET1) (1)
Consolidated	$	1,011,732	4.50	%	N/A		N/A	$	2,377,398	10.57	%
IBERIABANK	1,009,553		4.50		$	1,458,243	6.50	2,437,275		10.86
Tier 1 Risk-Based Capital (1)
Consolidated	$	1,348,977	6.00	%	N/A		N/A	$	2,509,496	11.16	%
IBERIABANK	1,346,070		6.00		$	1,794,760	8.00	2,437,275		10.86
Total Risk-Based Capital (1)
Consolidated	$	1,798,635	8.00	%	N/A		N/A	$	2,780,095	12.37	%
IBERIABANK	1,794,760		8.00		$	2,243,450	10.00	2,591,374		11.55

	2016
	Minimum				Well-Capitalized			Actual
	Amount		Ratio		Amount		Ratio	Amount		Ratio
Tier 1 Leverage
Consolidated	$	818,440	4.00	%	N/A		N/A	$	2,221,528	10.86	%
IBERIABANK	816,152		4.00		$	1,020,190	5.00	1,878,703		9.21
Common Equity Tier 1 (CET1) (1)
Consolidated	$	794,334	4.50	%	N/A		N/A	$	2,089,431	11.84	%
IBERIABANK	792,111		4.50		$	1,144,160	6.50	1,878,703		10.67
Tier 1 Risk-Based Capital (1)
Consolidated	$	1,059,112	6.00	%	N/A		N/A	$	2,221,528	12.59	%
IBERIABANK	1,056,147		6.00		$	1,408,197	8.00	1,878,703		10.67
Total Risk-Based Capital (1)
Consolidated	$	1,412,149	8.00	%	N/A		N/A	$	2,493,988	14.13	%
IBERIABANK	1,408,197		8.00		$	1,760,246	10.00	2,034,663		11.56