Business Segments (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

	Three Months Ended March 31, 2016
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest and dividend income	$	175,324		$	1,611		$	1		$	176,936
Interest expense	14,654			879			—			15,533
Net interest income	160,670			732			1			161,403
Provision for loan losses	14,905			—			—			14,905
Mortgage income	406			19,941			—			20,347
Service charges on deposit accounts	10,951			—			—			10,951
Title revenue	—			—			4,745			4,745
Other non-interest income	19,803			(1		)	—			19,802
Allocated expenses	(2,669		)	2,050			619			—
Non-interest expense	120,027			13,198			4,227			137,452
Income before income tax expense	59,567			5,424			(100		)	64,891
Income tax expense	20,001			2,153			(32		)	22,122
Net income	$	39,566		$	3,271		$	(68	)	$	42,769
Total loans and loans held for sale, net of unearned income	$	14,428,613		$	215,176		$	—		$	14,643,789
Total assets	19,774,092			291,893			26,578			20,092,563
Total deposits	16,256,147			4,419			—			16,260,566
Average assets	19,381,718			252,281			27,312			19,661,311

	Three Months Ended March 31, 2015
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest and dividend income	$	136,830		$	1,754		$	1		$	138,585
Interest expense	12,290			491			—			12,781
Net interest income	124,540			1,263			1			125,804
Provision for loan losses	5,345			—			—			5,345
Mortgage income	(1		)	18,024			—			18,023
Service charges on deposit accounts	9,262			—			—			9,262
Title revenue	—			—			4,629			4,629
Other non-interest income	16,989			(2		)	(2		)	16,985
Allocated expenses	(4,847		)	3,528			1,319			—
Non-interest expense	116,005			12,916			4,232			133,153
Income before income tax expense	34,287			2,841			(923		)	36,205
Income tax expense	10,313			1,122			(356		)	11,079
Net income	$	23,974		$	1,719		$	(567	)	$	25,126
Total loans and loans held for sale, net of unearned income	$	12,869,096		$	219,409		$	—		$	13,088,505
Total assets	17,772,632			254,401			24,729			18,051,762
Total deposits	14,660,135			4,889			—			14,665,024
Average assets	15,750,918			181,942			24,753			15,957,613