Business Segments (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

The following tables present certain information regarding our operations by reportable segment, including a reconciliation of segment results to reported consolidated results for the periods presented. Reconciling items between segment results and reported results include:

• Elimination of interest income and interest expense representing interest earned by IBERIABANK on interest-bearing checking accounts held by related companies, as well as the elimination of the related deposit balances at the IBERIABANK segment;

• Elimination of investment in subsidiary balances on certain operating segments included in total and average segment assets; and

• Elimination of intercompany due to and due from balances on certain operating segments that are included in total and average segment assets.

	Year Ended December 31, 2016
(Dollars in thousands)	IBERIABANK			IMC		LTC		Consolidated
Interest and dividend income	$	707,676		$	9,261	$	2	$	716,939
Interest expense	64,068			3,633		—		67,701
Net interest income	643,608			5,628		2		649,238
Provision for loan losses	44,336			88		—		44,424
Mortgage income	405			83,448		—		83,853
Title revenue	—			—		22,213		22,213
Other non-interest income	127,751			4		—		127,755
Allocated expenses	(13,972		)	10,686		3,286		—
Non-interest expense	484,099			65,133		17,433		566,665
Income before income tax expense	257,301			13,173		1,496		271,970
Income tax expense	79,565			5,023		605		85,193
Net income	$	177,736		$	8,150	$	891	$	186,777
Total loans and loans held for sale, net of unearned income	$	15,004,360		$	217,652	$	—	$	15,222,012
Total assets	21,319,267			315,057		24,866		21,659,190
Total deposits	17,402,742			5,541		—		17,408,283
Average assets	19,959,261			335,913		26,060		20,321,234

	Year Ended December 31, 2015
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest and dividend income	$	639,793		$	7,062		$	3		$	646,858
Interest expense	56,222			2,878			—			59,100
Net interest income	583,571			4,184			3			587,758
Provision for loan losses	30,908			—			—			30,908
Mortgage income	966			79,696			—			80,662
Title revenue	—			—			22,837			22,837
Other non-interest income	116,903			(2		)	(7		)	116,894
Allocated expenses	(16,253		)	12,036			4,217			—
Non-interest expense	495,158			57,784			17,363			570,305
Income before income tax expense	191,627			14,058			1,253			206,938
Income tax expense	58,006			5,581			507			64,094
Net income	$	133,621		$	8,477		$	746		$	142,844
Total loans and loans held for sale, net of unearned income	$	14,305,663		$	188,012		$	—		$	14,493,675
Total assets	19,220,085			256,888			27,095			19,504,068
Total deposits	16,173,831			4,917			—			16,178,748
Average assets	18,146,216			230,819			25,671			18,402,706

	Year Ended December 31, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest and dividend income	$	498,820		$	5,992		$	3		$	504,815
Interest expense	42,983			1,721			—			44,704
Net interest income	455,837			4,271			3			460,111
Provision for loan losses	18,966			94			—			19,060
Mortgage income	71			51,726			—			51,797
Title revenue	—			—			20,492			20,492
Other non-interest income	101,401			(61		)	(1		)	101,339
Allocated expenses	(11,602		)	8,203			3,399			—
Non-interest expense	412,165			44,761			16,688			473,614
Income before income tax expense	137,780			2,878			407			141,065
Income tax expense	34,352			1,148			183			35,683
Net income	$	103,428		$	1,730		$	224		$	105,382
Total loans and loans held for sale, net of unearned income	$	11,415,973		$	165,143		$	—		$	11,581,116
Total assets	15,537,731			194,156			26,017			15,757,904
Total deposits	12,515,329			5,196			—			12,520,525
Average assets	14,430,768			176,003			25,223			14,631,994