Acquisition Activity (Tables)

12 Months Ended

Dec. 31, 2011

Business Acquisition [Line Items]

Supplemental Pro Forma Information

(dollars in thousands, except per share data)	2011		2010
Interest and noninterest income	$	586,128	$	618,286
Net income		56,051		59,739
Earnings per share – basic		1.89		2.07
Earnings per share – diluted		1.89		2.06

Omni Bancshares, Inc. [Member]

Business Acquisition [Line Items]

Schedule Of Acquisition Consideration

(dollars in thousands)
	Number of Shares		Amount
Equity Consideration
Common Stock issued		698,768	$	41,053
Options issued		41,979		513
Total Equity Consideration			$	41,566
Non-Equity Consideration
Change in Control Payments			$	4,832
Cash				9
Total Non-Equity Consideration			$	4,841
Total Consideration Paid			$	46,407
Fair Value of Net Liabilities Assumed including Identifiable Intangible Assets				(17,567	)
Goodwill			$	63,974

Schedule Of Business Acquisitions

(dollars in thousands)	As Acquired		Fair Value Adjustments			As recorded by IBERIABANK
Assets
Cash and cash equivalents	$	54,683	$	—		$	54,683
Investment securities		91,808		(789	) (1)		91,019
Loans		503,695		(62,248	) (2)		441,447
Other real estate owned		24,759		(8,506	) (3)		16,253
Core deposit intangible		—		829	(4)		829
Deferred tax asset		1,398		32,009	(5)		33,407
Other assets		56,294		(12,653	) (6)		43,641
Total Assets	$	732,637	$	(51,358	)	$	681,279
Liabilities
Interest-bearing deposits		504,615		1,812	(7)		506,427
Noninterest-bearing deposits		129,181		—			129,181
Borrowings		58,168		196	(8)		58,364
Other liabilities		3,971		903	(9)		4,874
Total Liabilities	$	695,935	$	2,911		$	698,846

Explanation of Certain Fair Value Adjustments

(1) The adjustment represents the write down of the book value of OMNI's investments to their estimated fair value based on fair values on the date of acquisition.

(2) The adjustment represents the write down of the book value of OMNI's loans to their estimated fair value based on current interest rates and expected cash flows which includes an estimate of expected loan losses inherent in the portfolio.

(3) The adjustment represents the write down of the book value of OMNI's OREO properties to their estimated fair value at the acquisition date based on their appraised value, as adjusted for costs to sell.

(4) The adjustment represents the value of the core deposit base assumed in the acquisition. The core deposit asset was recorded as an identifiable intangible asset and will be amortized on an accelerated basis over the average life of the deposit base, estimated to be 10 years.

(5) The adjustment represents the value of the deferred tax asset recognized on the fair value adjustments of OMNI's acquired assets and assumed liabilities.

(6) The adjustment represents the write down of the book value of OMNI's property, equipment, and other assets to their estimated fair value at the acquisition date based on their appraised value.

(7) The adjustment is necessary because the weighted average interest rate of OMNI's CD's exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce interest expense over the life of the portfolio, which is estimated at 60 months.

(8) The adjustment is necessary because the interest rate of OMNI's fixed rate borrowings exceeded current interest rates on similar borrowings.

(9) The adjustment is necessary because the fair value of the Company's liability under assumed lease agreements from OMNI is lower than the total cash payments remaining under the existing leases.

Schedule Of Adjustments Had On The Goodwill Recorded On The Acquisition

(dollars in thousands)	Amount
Goodwill, as originally reported	$	63,518
Adjustments:
Valuation – loans acquired from OMNI		25,749
Valuation – OREO acquired from OMNI		5,663
Valuation – deferred tax asset		(32,009	)
Other asset valuations		1,053
Total adjustments to goodwill		456
Goodwill, as adjusted	$	63,974

Cameron Bancshares, Inc. [Member]

Business Acquisition [Line Items]

Schedule Of Acquisition Consideration

(dollars in thousands)	Number of Shares		Amount
Equity Consideration
Common Stock issued		2,384,461	$	140,087
Options issued		—		—
Total Equity Consideration			$	140,087
Non-Equity Consideration
Change in Control Payments			$	3,144
Cash				10
Total Non-Equity Consideration			$	3,154
Total Consideration Paid			$	143,241
Fair Value of Net Assets Acquired including Identifiable Intangible Assets				71,684
Goodwill			$	71,557

Schedule Of Business Acquisitions

(dollars in thousands)	As Acquired		Fair Value Adjustments			As recorded by IBERIABANK
Assets
Cash and cash equivalents	$	29,191	$	—		$	29,191
Investment securities		223,720		(35	) (1)		223,685
Loans		404,633		(22,559	) (2)		382,074
Other real estate owned		710		(315	) (3)		395
Core deposit intangible		—		5,178	(4)		5,178
Deferred tax asset		2,778		9,208	(5)		11,986
Other assets		41,747		(4,175	) (6)		37,572
Total Assets	$	702,779	$	(12,698	)	$	690,081
Liabilities
Interest-bearing deposits		402,090		818	(7)		402,908
Noninterest-bearing deposits		164,363		—			164,363
Borrowings		46,804		2,198	(8)		49,002
Other liabilities		2,124		—			2,124
Total Liabilities	$	615,381	$	3,016		$	618,397

Explanation of Certain Fair Value Adjustments

(1) The adjustment represents the write down of the book value of Cameron's investments to their estimated fair value based on fair values on the date of acquisition.

(2) The adjustment represents the write up of the book value of Cameron's loans to their estimated fair value based on current interest rates and expected cash flows, which includes an estimate of expected loan losses inherent in the portfolio.

(3) The adjustment represents the write down of the book value of Cameron's OREO properties to their estimated fair value at the acquisition date based on their appraised value, as adjusted for costs to sell.

(4) The adjustment represents the value of the core deposit base assumed in the acquisition. The core deposit asset was recorded as an identifiable intangible asset and will be amortized on an accelerated basis over the average life of the deposit base, estimated to be 10 years.

(5) The adjustment represents the value of the deferred tax asset recognized on the fair value adjustments of Cameron's acquired assets and assumed liabilities.

(6) The adjustment represents the write down of the book value of Cameron's property, equipment, and other assets to their estimated fair value at the acquisition date based on their appraised value.

(7) The adjustment is necessary because the weighted average interest rate of Cameron's CD's exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce interest expense on a declining basis over the life of the portfolio, which is estimated at 69 months.

(8) The adjustment is necessary because the interest rate of Cameron's fixed rate borrowings exceeded current interest rates on similar borrowings.

Schedule Of Adjustments Had On The Goodwill Recorded On The Acquisition

(dollars in thousands)	Amount
Goodwill, as originally reported	$	51,315
Adjustments:
Valuation – loans acquired from Cameron		29,144
Valuation – OREO acquired from Cameron		315
Valuation – deferred tax asset		(9,208	)
Other asset valuations		(9	)
Total adjustments to goodwill		20,242
Goodwill, as adjusted	$	71,557