10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

________________________________________________________________________________________________________

FORM 10-Q

________________________________________________________________________________________________________

ý Quarterly report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2012

OR

¨ Transition report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from  to

COMMISSION FILE NUMBER 001-34653

________________________________________________________________________________________________________

First Interstate BancSystem, Inc.

(Exact name of registrant as specified in its charter)

________________________________________________________________________________________________________

Montana	81-0331430
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
401 North 31st Street, Billings, MT	59116-0918
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 406/255-5390

______________________________________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files.)     Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	¨	Accelerated filer	ý
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  ¨ No  ý

Indicate the number of shares outstanding of each of the Registrant’s classes of common stock:

March 31, 2012 – Class A common stock	16,758,066
March 31, 2012 – Class B common stock	26,432,909

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES Quarterly Report on Form 10-Q Index
		Page
Part I.	Financial Information
Item 1.	Financial Statements (unaudited)
	Consolidated Balance Sheets March 31, 2012 and December 31, 2011	3
	Consolidated Statements of Income Three months ended March 31, 2012 and 2011	4
	Consolidated Statements of Comprehensive Income Three months ended March 31, 2012 and 2011	5
	Consolidated Statements of Changes in Stockholders’ Equity Three months ended March 31, 2012 and 2011	6
	Consolidated Statements of Cash Flows Three months ended March 31, 2012 and 2011	7
	Notes to Unaudited Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	44
Item 4.	Controls and Procedures	44
Part II.	Other Information
Item 1.	Legal Proceedings	44
Item 1A .	Risk Factors	44
Item  2.	Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.	Defaults Upon Senior Securities	45
Item 4.	Mine Safety Disclosures	45
Item 5.	Other Information	45
Item 6.	Exhibits	45
Signatures		47

2

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (In thousands, except share data) (Unaudited)
	March 31, 2012		December 31, 2011
Assets
Cash and due from banks	$	128,341	$	142,502
Federal funds sold	304		309
Interest bearing deposits in banks	494,279		329,636
Total cash and cash equivalents	622,924		472,447
Investment securities:
Available-for-sale	1,955,436		2,016,864
Held-to-maturity (estimated fair values of $166,932 and $161,877 at March 31, 2012 and December 31, 2011, respectively)	158,070		152,781
Total investment securities	2,113,506		2,169,645
Loans held for investment	4,099,936		4,133,028
Mortgage loans held for sale	58,680		53,521
Total loans	4,158,616		4,186,549
Less allowance for loan losses	115,902		112,581
Net loans	4,042,714		4,073,968
Premises and equipment, net of accumulated depreciation	185,230		184,771
Goodwill	183,673		183,673
Company-owned life insurance	75,342		74,880
Other real estate owned (“OREO”)	44,756		37,452
Accrued interest receivable	30,407		31,974
Mortgage servicing rights, net of accumulated amortization and impairment reserve	11,833		11,555
Deferred tax asset, net	9,571		9,628
Core deposit intangibles, net of accumulated amortization	7,002		7,357
Other assets	67,348		68,177
Total assets	$	7,394,306	$	7,325,527
Liabilities and Stockholders’ Equity
Deposits:
Non-interest bearing	$	1,284,823	$	1,271,709
Interest bearing	4,626,011		4,555,262
Total deposits	5,910,834		5,826,971
Securities sold under repurchase agreements	491,058		516,243
Accounts payable and accrued expenses	43,972		42,248
Accrued interest payable	8,255		8,123
Long-term debt	37,191		37,200
Other borrowed funds	6		7
Subordinated debentures held by subsidiary trusts	123,715		123,715
Total liabilities	6,615,031		6,554,507
Stockholders’ equity:
Nonvoting noncumulative preferred stock without par value; authorized 100,000 shares; issued and outstanding 5,000 shares as of March 31, 2012 and December 31, 2011	50,000		50,000
Common stock	268,411		266,842
Retained earnings	441,370		435,144
Accumulated other comprehensive income, net	19,494		19,034
Total stockholders’ equity	779,275		771,020
Total liabilities and stockholders’ equity	$	7,394,306	$	7,325,527

See accompanying notes to unaudited consolidated financial statements.

3

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME (In thousands, except per share data) (Unaudited)
	For the three months ended March 31,
	2012			2011
Interest income:
Interest and fees on loans	$	57,910		$	62,391
Interest and dividends on investment securities:
Taxable	9,705			9,911
Exempt from federal taxes	1,204			1,171
Interest on deposits in banks	237			367
Interest on federal funds sold	1			3
Total interest income	69,057			73,843
Interest expense:
Interest on deposits	6,262			9,871
Interest on securities sold under repurchase agreements	156			237
Interest on long-term debt	498			489
Interest on subordinated debentures held by subsidiary trusts	1,507			1,448
Total interest expense	8,423			12,045
Net interest income	60,634			61,798
Provision for loan losses	11,250			15,000
Net interest income after provision for loan losses	49,384			46,798
Non-interest income:
Other service charges, commissions and fees	8,424			7,380
Income from the origination and sale of loans	8,384			3,445
Service charges on deposit accounts	4,161			4,110
Wealth management revenues	3,283			3,295
Investment securities gains, net	31			2
Other income	2,099			1,927
Total non-interest income	26,382			20,159
Non-interest expense:
Salaries and wages	21,564			20,203
Employee benefits	8,966			7,499
Occupancy, net	3,988			4,215
Furniture and equipment	3,138			3,220
Outsourced technology services	2,266			2,241
FDIC insurance premiums	1,595			2,466
OREO expense, net of income	1,105			1,711
Mortgage servicing rights amortization	895			807
Mortgage servicing rights impairment recovery	(868		)	(347		)
Core deposit intangibles amortization	355			362
Other expenses	14,436			10,581
Total non-interest expense	57,440			52,958
Income before income tax expense	18,326			13,999
Income tax expense	6,112			4,493
Net income	12,214			9,506
Preferred stock dividends	853			844
Net income available to common shareholders	$	11,361		$	8,662
Basic earnings per common share	$	0.26		$	0.20
Diluted earnings per common share	$	0.26		$	0.20

See accompanying notes to unaudited consolidated financial statements.

4

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (In thousands) (Unaudited)
	For the three months ended March 31,
	2012			2011
Net income	$	12,214		$	9,506
Other comprehensive income, before tax:
Investment securities available-for sale:
Change in net unrealized gain during period	755			417
Reclassification adjustment for gains included in income	(31		)	(2		)
Defined benefit post-retirement benefits plans:
Change in net actuarial loss	33			35
Other comprehensive income, before tax	757			450
Deferred tax expense related to other comprehensive income	297			177
Other comprehensive income, net of tax	460			273
Comprehensive income, net of tax	$	12,674		$	9,779

See accompanying notes to unaudited consolidated financial statements.

5

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (In thousands, except share and per share data) (Unaudited)
	Preferred stock		Common stock			Retained earnings			Accumulated other comprehensive income		Total stockholders’ equity
Balance at December 31, 2011	$	50,000	$	266,842		$	435,144		$	19,034	$	771,020
Comprehensive income:
Net income	—		—			12,214			—		12,214
Other comprehensive income, net of tax	—		—			—			460		460
Common stock transactions:
17,904 common shares purchased and retired	—		(256		)	—			—		(256		)
2,358 common shares issued	—		—			—			—		—
122,912 non-vested common shares issued	—		—			—			—		—
1,556 non-vested common shares forfeited	—		—			—			—		—
100,991 stock options exercised, net of 37,397 shares tendered in payment of option price and income tax withholding amounts	—		1,068			—			—		1,068
Tax benefit of stock-based compensation	—		114			—			—		114
Stock-based compensation expense	—		643			—			—		643
Cash dividends declared:
Common ($0.12 per share)	—		—			(5,135		)	—		(5,135		)
Preferred (6.75% per share)	—		—			(853		)	—		(853		)
Balance at March 31, 2012	$	50,000	$	268,411		$	441,370		$	19,494	$	779,275
Balance at December 31, 2010	$	50,000	$	264,174		$	413,253		$	9,375	$	736,802
Comprehensive income:
Net income	—		—			9,506			—		9,506
Other comprehensive income, net of tax	—		—			—			273		273
Common stock transactions:
12,056 common shares purchased and retired	—		(164		)	—			—		(164		)
130,904 non-vested common shares issued	—		—			—			—		—
1,911 non-vested common shares forfeited	—		(7		)	—			—		(7		)
Non-vested liability awards vesting during period	—		195			—			—		195
43,622 stock options exercised, net of 104,050 shares tendered in payment of option price and income tax withholding amounts	—		37			—			—		37
Tax benefit of stock-based compensation	—		257			—			—		257
Stock-based compensation expense	—		440			—			—		440
Cash dividends declared:
Common ($0.1125 per share)	—		—			(4,798		)	—		(4,798		)
Preferred (6.75% per share)	—		—			(844		)	—		(844		)
Balance at March 31, 2011	$	50,000	$	264,932		$	417,117		$	9,648	$	741,697

See accompanying notes to unaudited consolidated financial statements.

6

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (In thousands) (Unaudited)
	For the three months ended March 31,
	2012			2011
Cash flows from operating activities:
Net income	$	12,214		$	9,506
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	11,250			15,000
Net loss on disposal of property and equipment	42			3
Depreciation and amortization	4,302			4,436
Net premium amortization on investment securities	2,678			2,598
Net gains on investment securities transactions	(31		)	(2		)
Net gains on sales of mortgage loans held for sale	(5,927		)	(2,260		)
Net loss (gain) on sale of OREO	74			(156		)
Write-down of OREO	578			1,552
Net reversal of impairment of mortgage servicing rights	(868		)	(347		)
Net gain on sale of mortgage servicing rights	(19		)	—
Deferred income tax benefit	(282		)	(859		)
Net increase in cash surrender value of company-owned life insurance policies	(462		)	(489		)
Stock-based compensation expense	643			411
Tax benefits from stock-based compensation expense	114			257
Excess tax benefits from stock-based compensation	(94		)	(192		)
Originations of mortgage loans held for sale, net of sales	(272		)	27,123
Changes in operating assets and liabilities:
Decrease in interest receivable	1,567			1,248
Decrease in other assets	907			7,828
Increase (decrease) in accrued interest payable	132			(1,016		)
Increase in accounts payable and accrued expenses	1,744			1,702
Net cash provided by operating activities	28,290			66,343
Cash flows from investing activities:
Purchases of investment securities:
Held-to-maturity	(7,592		)	(1,868		)
Available-for-sale	(222,413		)	(193,791		)
Proceeds from maturities and paydowns of investment securities:
Held-to-maturity	2,193			2,720
Available-for-sale	282,083			136,839
Proceeds from sales of mortgage servicing rights	907			—
Extensions of credit to customers, net of repayments	10,027			64,419
Recoveries of loans charged-off	1,158			1,305
Proceeds from sales of OREO	5,691			3,160
Capital expenditures, net of sales	(3,453		)	(1,639		)
Net cash provided by investing activities	$	68,601		$	11,145
Cash flows from financing activities:

7

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED) (In thousands) (Unaudited)
	For the three months ended March 31,
	2012			2011
Net increase in deposits	$	83,863		$	5,471
Net decrease in repurchase agreements	(25,185		)	(83,199		)
Net increase (decrease) in short-term borrowings	(1		)	531
Repayments of long-term debt	(9		)	(11		)
Proceeds from issuance of common stock	1,068			37
Excess tax benefits from stock-based compensation	94			192
Purchase and retirement of common stock	(256		)	(164		)
Dividends paid to common stockholders	(5,135		)	(4,798		)
Dividends paid to preferred stockholders	(853		)	(844		)
Net cash provided by (used in) financing activities	53,586			(82,785		)
Net increase (decrease) in cash and cash equivalents	150,477			(5,297		)
Cash and cash equivalents at beginning of period	472,447			685,618
Cash and cash equivalents at end of period	$	622,924		$	680,321
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes	$	100		$	—
Cash paid during the period for interest expense	$	8,291		$	13,061

See accompanying notes to unaudited consolidated financial statements.

8

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(1) Basis of Presentation

In the opinion of management, the accompanying unaudited consolidated financial statements of First Interstate BancSystem, Inc. and subsidiaries (the “Company”) contain all adjustments (all of which are of a normal recurring nature) necessary to present fairly the financial position of the Company at March 31, 2012 and December 31, 2011 and the results of operations and cash flows for each of the three month periods ended March 31, 2012 and 2011, in conformity with U.S. generally accepted accounting principles. The balance sheet information at December 31, 2011 is derived from audited consolidated financial statements. Certain reclassifications, none of which were material, have been made to conform prior year financial statements to the March 31, 2012 presentation. These reclassifications did not change previously reported net income or stockholders’ equity.

These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. Operating results for the three months ended March 31, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012.

(2) Investment Securities

The amortized cost and approximate fair values of investment securities are summarized as follows:

March 31, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale
Obligations of U.S. government agencies	$	1,085,140	$	3,993	$	(687	)	$	1,088,446
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	835,494		30,820		(34		)	866,280
Private mortgage-backed securities	704		11		(5		)	710
Total	$	1,921,338	$	34,824	$	(726	)	$	1,955,436

March 31, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Held-to Maturity
State, county and municipal securities	$	157,921	$	9,020	$	(158	)	$	166,783
Other securities	149		—		—			149
Total	$	158,070	$	9,020	$	(158	)	$	166,932

December 31, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale
Obligations of U.S. government agencies	$	1,134,427	$	4,353	$	(662	)	$	1,138,118
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	848,444		29,567		(14		)	877,997
Private mortgage-backed securities	758		7		(16		)	749
Total	$	1,983,629	$	33,927	$	(692	)	$	2,016,864

December 31, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Held-to Maturity
State, county and municipal securities	$	152,619	$	9,113	$	(17	)	$	161,715
Other securities	162		—		—			162
Total	$	152,781	$	9,113	$	(17	)	$	161,877

9

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

Gross gains of $31 and $2 were realized on the disposition of available-for-sale securities during the three months ended March 31, 2012 and 2011, respectively. No gross losses were realized on the disposition of available-for-sale investment securities during the three months ended March 31, 2012 or 2011.

The following table shows the gross unrealized losses and fair values of investment securities, aggregated by investment category, and the length of time individual investment securities have been in a continuous unrealized loss position, as of March 31, 2012 and December 31, 2011.

	Less than 12 Months					12 Months or More					Total
March 31, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Available-for-Sale
Obligations of U.S. government agencies	$	177,078	$	(687	)	$	—	$	—		$	177,078	$	(687	)
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	3,617		(34		)	—		—			3,617		(34		)
Private mortgage-backed securities	—		—			167		(5		)	167		(5		)
Total	$	180,695	$	(721	)	$	167	$	(5	)	$	180,862	$	(726	)

	Less than 12 Months					12 Months or More					Total
March 31, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Held-to-Maturity
State, county and municipal securities	$	5,501	$	(134	)	$	733	$	(24	)	$	6,234	$	(158	)

	Less than 12 Months					12 Months or More					Total
December 31, 2011	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Available-for-Sale
Obligations of U.S. government agencies	$	287,404	$	(662	)	$	—	$	—		$	287,404	$	(662	)
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	45,694		(14		)	—		—			45,694		(14		)
Private mortgage-backed securities	246		(10		)	177		(6		)	423		(16		)
Total	$	333,344	$	(686	)	$	177	$	(6	)	$	333,521	$	(692	)

	Less than 12 Months				12 Months or More					Total
December 31, 2011	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Held-to-Maturity
State, county and municipal securities	$	—	$	—	$	773	$	(17	)	$	773	$	(17	)

The investment portfolio is evaluated quarterly for other-than-temporary declines in the market value of each individual investment security. The Company had 27 and 24 individual investment securities that were in an unrealized loss position as of March 31, 2012 and December 31, 2011, respectively. Unrealized losses as of March 31, 2012 and December 31, 2011 related primarily to fluctuations in the current interest rates. The Company does not have the intent to sell any of the available-for-sale securities in the above table and it is more likely than not that the Company will not have to sell any such securities before a recovery in cost. No impairment losses were recorded during the three months ended March 31, 2012 or 2011.

10

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

Maturities of investment securities at March 31, 2012 are shown below. Maturities of mortgage-backed securities have been adjusted to reflect shorter maturities based upon estimated prepayments of principal. All other investment securities maturities are shown at contractual maturity dates.

	Available-for-Sale				Held-to-Maturity
March 31, 2012	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Within one year	$	385,624	$	395,736	$	7,023	$	6,799
After one year but within five years	1,312,315		1,328,373		22,288		23,096
After five years but within ten years	146,006		151,084		66,498		70,529
After ten years	77,393		80,243		62,112		66,359
Total	1,921,338		1,955,436		157,921		166,783
Investments with no stated maturity	—		—		149		149
Total	$	1,921,338	$	1,955,436	$	158,070	$	166,932

As of March 31, 2012, the Company had investment securities callable within one year with amortized costs and estimated fair values of $634,320 and $635,629, respectively, including callable structured notes with amortized costs and estimated fair values of $195,257 and $195,899, respectively. These investment securities are primarily classified as available-for-sale and included in the after one year but within five years category in the table above.

(3) Loans

The following table presents loans by class as of the dates indicated:

	March 31, 2012		December 31, 2011
Real estate loans:
Commercial	$	1,533,624	$	1,553,155
Construction:
Land acquisition & development	272,874		278,613
Residential	50,332		61,106
Commercial	65,196		61,054
Total construction loans	388,402		400,773
Residential	562,588		571,943
Agricultural	171,685		175,302
Total real estate loans	2,656,299		2,701,173
Consumer:
Indirect consumer	407,389		407,651
Other consumer	142,144		147,487
Credit card	56,540		60,933
Total consumer loans	606,073		616,071
Commercial	708,397		693,261
Agricultural	128,599		119,710
Other, including overdrafts	568		2,813
Loans held for investment	4,099,936		4,133,028
Mortgage loans held for sale	58,680		53,521
Total loans	$	4,158,616	$	4,186,549

11

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following tables present the contractual aging of the Company’s recorded investment in past due loans by class as of the period indicated:

							Total Loans
	30 - 59		60 - 89		> 90		30 or More
	Days		Days		Days		Days		Current		Non-accrual		Total
As of March 31, 2012	Past Due		Past Due		Past Due		Past Due		Loans		Loans		Loans
Real estate
Commercial	$	18,492	$	2,956	$	1,044	$	22,492	$	1,450,034	$	61,098	$	1,533,624
Construction:
Land acquisition & development	3,445		290		402		4,137		210,261		58,476		272,874
Residential	—		1,185		137		1,322		45,047		3,963		50,332
Commercial	1,556		150		—		1,706		41,198		22,292		65,196
Total construction loans	5,001		1,625		539		7,165		296,506		84,731		388,402
Residential	2,995		1,079		1,919		5,993		541,219		15,376		562,588
Agricultural	6,007		435		—		6,442		160,573		4,670		171,685
Total real estate loans	32,495		6,095		3,502		42,092		2,448,332		165,875		2,656,299
Consumer:
Indirect consumer	2,024		128		—		2,152		404,831		406		407,389
Other consumer	722		157		128		1,007		140,243		894		142,144
Credit card	507		194		660		1,361		55,154		25		56,540
Total consumer loans	3,253		479		788		4,520		600,228		1,325		606,073
Commercial	13,709		1,460		629		15,798		680,391		12,208		708,397
Agricultural	1,026		13		366		1,405		125,692		1,502		128,599
Other, including overdrafts	—		—		—		—		568		—		568
Loans held for investment	50,483		8,047		5,285		63,815		3,855,211		180,910		4,099,936
Mortgage loans originated for sale	—		—		—		—		58,680		—		58,680
Total loans	$	50,483	$	8,047	$	5,285	$	63,815	$	3,913,891	$	180,910	$	4,158,616

12

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

							Total Loans
	30 - 59		60 - 89		> 90		30 or More
	Days		Days		Days		Days		Current		Non-accrual		Total
As of December 31, 2011	Past Due		Past Due		Past Due		Past Due		Loans		Loans		Loans
Real estate
Commercial	$	22,124	$	7,871	$	630	$	30,625	$	1,455,139	$	67,391	$	1,553,155
Construction:
Land acquisition & development	5,251		2,448		867		8,566		208,134		61,913		278,613
Residential	415		—		—		415		56,219		4,472		61,106
Commercial	1,698		—		—		1,698		34,820		24,536		61,054
Total construction loans	7,364		2,448		867		10,679		299,173		90,921		400,773
Residential	4,669		973		1,798		7,440		546,278		18,225		571,943
Agricultural	4,103		1,831		—		5,934		166,119		3,249		175,302
Total real estate loans	38,260		13,123		3,295		54,678		2,466,709		179,786		2,701,173
Consumer:
Indirect consumer	3,078		370		45		3,493		403,695		463		407,651
Other consumer	1,479		436		60		1,975		144,625		887		147,487
Credit card	604		375		585		1,564		59,343		26		60,933
Total consumer loans	5,161		1,181		690		7,032		607,663		1,376		616,071
Commercial	13,721		3,464		405		17,590		657,609		18,062		693,261
Agricultural	476		215		110		801		118,150		759		119,710
Other, including overdrafts	—		2		—		2		2,811		—		2,813
Loans held for investment	57,618		17,985		4,500		80,103		3,852,942		199,983		4,133,028
Mortgage loans originated for sale	—		—		—		—		53,521		—		53,521
Total loans	$	57,618	$	17,985	$	4,500	$	80,103	$	3,906,463	$	199,983	$	4,186,549

If interest on non-accrual loans had been accrued, such income would have approximated $2,702 and $2,838 for the three months ended March 31, 2012 and 2011, respectively.

13

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The Company considers impaired loans to include all loans risk rated doubtful, loans placed on non-accrual status and loans renegotiated in troubled debt restructurings with the exception of consumer loans. The following tables present information on the Company’s recorded investment in impaired loans as of dates indicated:

	As of March 31, 2012
	Unpaid Total Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance
Real estate:
Commercial	$	99,746	$	64,702	$	23,742	$	88,444	$	7,083
Construction:
Land acquisition & development	72,504		23,982		36,379		60,361		12,632
Residential	5,212		2,203		1,760		3,963		276
Commercial	24,403		11,218		11,074		22,292		3,978
Total construction loans	102,119		37,403		49,213		86,616		16,886
Residential	17,272		8,318		7,627		15,945		2,451
Agricultural	7,526		7,028		—		7,028		—
Total real estate loans	226,663		117,451		80,582		198,033		26,420
Commercial	20,200		5,737		7,822		13,559		4,122
Agricultural	1,566		1,028		486		1,514		491
Total	$	248,429	$	124,216	$	88,890	$	213,106	$	31,033

	As of December 31, 2011
	Unpaid Total Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance
Real estate:
Commercial	$	97,745	$	62,769	$	23,218	$	85,987	$	6,741
Construction:
Land acquisition & development	73,258		22,300		39,131		61,431		12,084
Residential	13,721		10,427		2,044		12,471		312
Commercial	26,647		3,510		21,026		24,536		5,042
Total construction loans	113,626		36,237		62,201		98,438		17,438
Residential	18,305		2,678		15,626		18,304		3,844
Agricultural	8,018		7,470		—		7,470		—
Total real estate loans	237,694		109,154		101,045		210,199		28,023
Commercial	26,348		7,354		12,284		19,638		4,664
Agricultural	759		496		263		759		151
Total	$	264,801	$	117,004	$	113,592	$	230,596	$	32,838

14

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The following table presents the average recorded investment in and income recognized on impaired loans for the periods indicated:

	Three months ended March 31, 2012				Three months ended March 31, 2011
	Average				Average
	Recorded		Income		Recorded	Income
	Investment		Recognized		Investment	Recognized
Real estate:
Commercial	$	88,657	$	351	74,768	$	92
Construction:
Land acquisition & development	62,227		16		45,552	45
Residential	9,208		—		18,121	19
Commercial	24,265		—		19,321	—
Total construction loans	95,700		16		82,994	64
Residential	18,072		9		21,070	—
Agricultural	7,268		32		3,677	2
Total real estate loans	209,697		408		182,509	158
Commercial	17,885		22		34,397	42
Agricultural	1,234		4		920	—
Total	$	228,816	$	434	217,826	$	200

The amount of interest income recognized by the Company within the period that the loans were impaired was primarily related to loans modified in a troubled debt restructuring that remained on accrual status. Interest payments received on non-accrual impaired loans are applied to principle. Interest income is subsequently recognized only to the extent cash payments are received in excess of principle due. If interest on impaired loans had been accrued, interest income on impaired loans would have been approximately $2,683 and $2,810 for the three months ended March 31, 2012 and 2011, respectively.

Collateralized impaired loans are generally recorded at the fair value of the underlying collateral using discounted cash flows, independent appraisals and management estimates based upon current market conditions. For loans measured under the present value of cash flows method, the change in present value attributable to the passage of time, if applicable, is recognized in the provision for loan losses and thus no interest income is recognized.

Modifications of performing loans are made in the ordinary course of business and are completed on a case-by-case basis as negotiated with the borrower. Loan modifications typically include interest rate concessions, interest only periods of less than twelve months, short-term payment deferrals and extension of amortization periods to provide payment relief. A loan modification is considered a troubled debt restructuring if the borrower is experiencing financial difficulties and the Company, for economic or legal reasons, grants a concession to the borrower that it would not otherwise consider. Certain troubled debt restructurings are on non-accrual status at the time of restructuring and are typically returned to accrual status after considering the borrower's sustained repayment performance in accordance with the restructuring agreement for a period of at least six months and management is reasonably assured of future performance. If the troubled debt restructuring meets these performance criteria and the interest rate granted at the modification is equal to or greater than the rate that the Company was willing to accept at the time of the restructuring for a new loan with comparable risk, then the loan will return to performing status and the accrual of interest will resume.

15

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The Company had loans renegotiated in troubled debt restructurings of $88,949 as of March 31, 2012, of which $52,111 were included in non-accrual loans and $36,838 were on accrual status. The Company had loans renegotiated in troubled debt restructurings of $94,827 as of December 31, 2011, of which $57,451 were included in non-accrual loans and $37,376 were on accrual status.

The following table presents information on the Company's troubled debt restructurings that occurred during the three months ended March 31, 2012:

	Number of Notes	Type of Concession								Principle Balance at Restructure Date
		Interest only period		Extension of terms or maturity		Interest rate adjustment		Other (1)
Real estate:
Commercial	9	$	—	$	—	$	1,089	$	8,463	$	9,552
Construction:
Land acquisition & development	2	—		—		—		623		623
Commercial	1	—		—		—		3,155		3,155
Total construction loans	3	—		—		—		3,778		3,778
Residential	2	568		25		—		—		593
Total real estate loans	14	568		25		1,089		12,241		13,923
Commercial	5	13		98		—		80		191
Total	19	$	581	$	123	$	1,089	$	12,321	$	14,114

(1) Other includes concessions that reduce or defer payments for a specified period of time and/or extend amortization schedules.

For troubled debt restructurings that were on non-accrual status or otherwise deemed impaired before the modification, a specific reserve may already be recorded. In periods subsequent to modification, the Company continues to evaluate all troubled debt restructurings for possible impairment and recognizes impairment through the allowance. Additionally these loans continue to work their way through the credit cycle through charge-off, pay-off or foreclosure. Financial effects of modifications of troubled debt restructurings may include principle loan forgiveness or other charge-offs directly related to the restructuring. The Company had no charge-offs directly related to modifying troubled debt restructurings during the three months ended March 31, 2012.

The following table presents information on the Company's troubled debt restructurings during the previous 12 months for which there was a payment default during the three month period ended March 31, 2012. The Company considers a payment default to occur on troubled debt restructurings when the loan is 90 days or more past due or was placed on non-accrual status after the modification. Four of the five troubled debt restructurings with payment defaults in the following table are on non-accrual status.

	As of March 31, 2012
	Number of Notes	Balance
Real estate:
Land acquisition & development	1	505
Total construction loans	1	505
Agriculture	2	1,624
Total real estate loans	3	2,129
Agricultural	2	328
Total	5	$	2,457

At March 31, 2012, there were no material commitments to lend additional funds to borrowers whose existing loans have been renegotiated or are classified as non-accrual.

16

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

As part of the on-going and continuous monitoring of the credit quality of the Company’s loan portfolio, management tracks internally assigned risk classifications of loans. The Company adheres to a Uniform Classification System developed jointly by the various bank regulatory agencies to internally risk rate loans. The Uniform Classification System defines three broad categories of criticized assets, which the Company uses as credit quality indicators:

Other Assets Especially Mentioned — includes loans that exhibit weaknesses in financial condition, loan structure or documentation, which if not promptly corrected, may lead to the development of abnormal risk elements.

Substandard — includes loans that are inadequately protected by the current sound worth and paying capacity of the borrower. Although the primary source of repayment for a Substandard is not currently sufficient; collateral or other sources of repayment are sufficient to satisfy the debt. Continuance of a Substandard loan is not warranted unless positive steps are taken to improve the worthiness of the credit.

Doubtful — includes loans that exhibit pronounced weaknesses to a point where collection or liquidation in full, on the basis of currently existing facts, conditions and values, is highly questionable and improbable. Doubtful loans are required to be placed on non-accrual status and are assigned specific loss exposure.

The following tables present the Company’s recorded investment in criticized loans by class and credit quality indicator based on the most recent analysis performed as of the dates indicated:

	Other Assets Especially Mentioned		Substandard		Doubtful		Total Criticized Loans
As of March 31, 2012
Real estate:
Commercial	$	117,979	$	149,852	$	25,252	$	293,083
Construction:
Land acquisition & development	34,909		34,806		35,878		105,593
Residential	1,536		5,428		1,760		8,724
Commercial	55		11,061		11,234		22,350
Total construction loans	36,500		51,295		48,872		136,667
Residential	8,963		18,587		7,141		34,691
Agricultural	22,993		16,128		395		39,516
Total real estate loans	186,435		235,862		81,660		503,957
Consumer:
Indirect consumer	1,033		1,755		202		2,990
Other consumer	825		1,461		585		2,871
Credit card	—		558		2,757		3,315
Total consumer loans	1,858		3,774		3,544		9,176
Commercial	45,730		33,714		7,906		87,350
Agricultural	8,048		2,815		486		11,349
Total	$	242,071	$	276,165	$	93,596	$	611,832

17

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

	Other Assets Especially Mentioned		Substandard		Doubtful		Total Criticized Loans
As of December 31, 2011
Real estate:
Commercial	$	129,046	$	153,320	$	25,087	$	307,453
Construction:
Land acquisition & development	37,294		31,873		38,761		107,928
Residential	9,448		5,528		2,044		17,020
Commercial	—		2,620		21,916		24,536
Total construction loans	46,742		40,021		62,721		149,484
Residential	8,149		15,706		15,140		38,995
Agricultural	16,037		18,498		395		34,930
Total real estate loans	199,974		227,545		103,343		530,862
Consumer:
Indirect consumer	1,141		1,729		247		3,117
Other consumer	745		1,361		674		2,780
Credit card	—		486		2,789		3,275
Total consumer loans	1,886		3,576		3,710		9,172
Commercial	34,698		33,478		12,849		81,025
Agricultural	4,345		5,195		263		9,803
Total	$	240,903	$	269,794	$	120,165	$	630,862

The Company maintains a credit review function, which is independent of the credit approval process, to assess assigned internal risk classifications and monitor compliance with internal lending policies and procedures. Written action plans with firm target dates for resolution of identified problems are maintained and reviewed on a quarterly basis for all categories of criticized loans.

18

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(4) Allowance For Loan Losses

The following tables present a summary of changes in the allowance for loan losses by portfolio segment for the periods indicated.

Three months ended March 31, 2012	Real Estate			Consumer			Commercial			Agriculture			Other		Total
Allowance for loan losses:
Beginning balance	$	87,396		$	8,594		$	15,325		$	1,266		$	—	$	112,581
Provision charged to operating expense	6,382			(591		)	5,441			18			—		11,250
Less loans charged-off	(5,156		)	(1,312		)	(2,512		)	(107		)	—		(9,087		)
Add back recoveries of loans previously charged-off	506			521			126			5			—		1,158
Ending balance	$	89,128		$	7,212		$	18,380		$	1,182		$	—	$	115,902
Loan individually evaluated for impairment	$	26,673		$	—		$	4,126		$	491		$	—	$	31,290
Loans collectively evaluated for impairment	62,455			7,212			14,254			691			—		84,612
Ending balance	$	89,128		$	7,212		$	18,380		$	1,182		$	—	$	115,902
Total loans:
Individually evaluated for impairment	$	198,033		$	—		$	13,559		$	1,514		$	—	$	213,106
Collectively evaluated for impairment	2,516,946			606,073			694,838			127,085			568		3,945,510
Total loans	$	2,714,979		$	606,073		$	708,397		$	128,599		$	568	$	4,158,616

Three months ended March 31, 2011	Real Estate			Consumer			Commercial			Agriculture			Other		Total
Allowance for loan losses:
Beginning balance	$	84,181		$	9,332		$	25,354		$	1,613		$	—	$	120,480
Provision charged to operating expense	12,155			688			2,457			(300		)	—		15,000
Less loans charged-off	(4,231		)	(1,460		)	(6,642		)	(6		)	—		(12,339		)
Add back recoveries of loans previously charged-off	245			432			621			7			—		1,305
Ending balance	$	92,350		$	8,992		$	21,790		$	1,314		$	—	$	124,446
Loans individually evaluated for impairment	$	31,778		$	—		$	11,029		$	272		$	—	$	43,079
Loans collectively evaluated for impairment	60,571			8,992			10,739			1,043			22		81,367
Ending balance	$	92,349		$	8,992		$	21,768		$	1,315		$	22	$	124,446
Total loans:
Individually evaluated for impairment	$	194,709		$	—		$	27,160		$	1,072		$	—	$	222,941
Collectively evaluated for impairment	2,616,734			625,083			676,677			120,499			1,830		4,040,823
Total loans	$	2,811,443		$	625,083		$	703,837		$	121,571		$	1,830	$	4,263,764

19

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The Company performs a quarterly assessment of the adequacy of its allowance for loan losses in accordance with generally accepted accounting principles. The methodology used to assess the adequacy is consistently applied to the Company's loan portfolio and consists of three elements: (1) specific valuation allowances based on probable losses on impaired loans; (2) historical valuation allowances based on loan loss experience for similar loans with similar characteristics and trends; and (3) general valuation allowances determined based on changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends, general economic conditions and other qualitative risk factors both internal and external to the Company.

Specific allowances are established for loans where management has determined that probability of a loss exists by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies and any relevant qualitative or environmental factors impacting the loan. Historical valuation allowances are determined by applying percentage loss factors to the credit exposures from outstanding loans. For commercial, agricultural and real estate loans, loss factors are applied based on the internal risk classifications of these loans. For consumer loans, loss factors are applied on a portfolio basis. For commercial, agriculture and real estate loans, loss factor percentages are based on a migration analysis of our historical loss experience, designed to account for credit deterioration. For consumer loans, loss factor percentages are based on a one-year loss history. General valuation allowances are determined by evaluating, on a quarterly basis, changes in the nature and volume of the loan portfolio, overall portfolio quality, industry concentrations, current economic and regulatory factors and the estimated impact of current economic, environmental and regulatory conditions on historical loss rates.

(5) Common Stock

The Company had 16,758,066 and 16,443,429 shares of Class A common stock outstanding as of March 31, 2012 and December 31, 2011, respectively.

The Company had 26,432,909 and 26,540,745 shares of Class B common stock outstanding as of March 31, 2012 and December 31, 2011, respectively.

(6) Earnings per Common Share

Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period presented, excluding unvested restricted stock. Diluted earnings per share is calculated by dividing net income by the weighted average number of common shares determined for the basic earnings per share computation plus the dilutive effects of stock-based compensation using the treasury stock method.

The following table sets forth the computation of basic and diluted earnings per share for the three month periods ended March 31, 2012 and 2011.

Three months ended March 31,	2012		2011
Net income	$	12,214	$	9,506
Less preferred stock dividends	853		844
Net income available to common shareholders, basic and diluted	$	11,361	$	8,662
Weighted average common shares outstanding for basic earnings per share computation	42,873,769		42,689,390
Dilutive effects of stock-based compensation	108,774		170,591
Weighted average common shares outstanding for diluted earnings per common share computation	42,982,543		42,859,981
Basic earnings per common share	$	0.26	$	0.20
Diluted earnings per common share	$	0.26	$	0.20

20

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The Company had 2,657,668 and 2,265,709 stock options outstanding as of March 31, 2012 and 2011, respectively, that were not included in the computation of diluted earnings per common share because their effect would be anti-dilutive. The Company had 48,196 and 41,704 shares of unvested restricted stock as of March 31, 2012 and 2011, respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met.

(7) Regulatory Capital

The Company is subject to the regulatory capital requirements administered by federal banking regulators and the Federal Reserve. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios of total and tier 1 capital to risk-weighted assets, and of tier 1 capital to average assets, as defined in the regulations. As of March 31, 2012 and December 31, 2011, the Company exceeded all capital adequacy requirements to which it is subject.

Actual capital amounts and ratios and selected minimum regulatory thresholds for the Company and its bank subsidiary, First Interstate Bank (“FIB”), as of March 31, 2012 and December 31, 2011 are presented in the following table:

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
March 31, 2012
Total risk-based capital:
Consolidated	$	809,702	16.9	%	$	383,451	8.0	%	NA		NA
FIB	670,468		14.1		381,301		8.0		$	476,626	10.0	%
Tier 1 risk-based capital:
Consolidated	714,097		14.9		191,726		4.0		NA		NA
FIB	595,194		12.5		190,651		4.0		$	285,976	6.0
Leverage capital ratio:
Consolidated	714,097		10.0		285,341		4.0		NA		NA
FIB	595,194		8.4		284,374		4.0		$	355,467	5.0

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2011
Total risk-based capital:
Consolidated	$	800,354	16.5	%	$	387,082	8.0	%	NA		NA
FIB	663,860		13.8		384,987		8.0		$	481,234	10.0	%
Tier 1 risk-based capital:
Consolidated	704,229		14.6		193,541		4.0		NA		NA
FIB	588,059		12.2		192,494		4.0		$	288,740	6.0
Leverage capital ratio:
Consolidated	704,229		9.8		286,303		4.0		NA		NA
FIB	588,059		8.2		285,358		4.0		$	356,698	5.0

21

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(8) Commitments and Contingencies

In the normal course of business, the Company is involved in various claims and litigation. In the opinion of management, following consultation with legal counsel, the ultimate liability or disposition thereof is not expected to have a material adverse effect on the consolidated financial condition, results of operations or liquidity of the Company.

The Company had commitments under construction contracts of $3,254 as of March 31, 2012.

The Company had commitments to purchase available-for-sale U.S. government agency securities of $10,000 and held-to-maturity municipal investment securities of $2,020 as of March 31, 2012.

(9) Financial Instruments with Off-Balance Sheet Risk

The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the commitment contract. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. At March 31, 2012, commitments to extend credit to existing and new borrowers approximated $1,060,546, which includes $292,820 on unused credit card lines and $279,923 with commitment maturities beyond one year.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. At March 31, 2012, the Company had outstanding standby letters of credit of $66,522. The estimated fair value of the obligation undertaken by the Company in issuing the standby letters of credit is included in other liabilities in the Company’s consolidated balance sheet.

(10) Supplemental Disclosures to Consolidated Statement of Cash Flows

The Company transferred loans of $13,978 and $1,971 to OREO during the three months ended March 31, 2012 and 2011, respectively.

The Company transferred accrued liabilities of $195 to common stock in conjunction with the vesting of liability-classified non-vested stock awards during the three months ended March 31, 2011.

The Company transferred internally originated mortgage servicing rights of $1,040 and $553 from loans to mortgage servicing assets during the three months ended March 31, 2012 and 2011, respectively.

22

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(11) Other Comprehensive Income

The gross amounts of each component of other comprehensive income and the related tax effects are as follows:

	Before Tax Amount			Tax Expense (Benefit)			Net of Tax Amount
Three months ended March 31, 2012:
Investment securities available-for sale:
Change in net unrealized gain during period	$	755		$	296		$	459
Reclassification adjustment for net gains included in net income	(31		)	(12		)	(19		)
Defined benefits post-retirement benefit plan:
Change in net actuarial loss	33			13			20
Total other comprehensive income	$	757		$	297		$	460
Three months ended March 31, 2011:
Investment securities available-for sale:
Change in net unrealized gain during period	$	417		$	163		$	254
Reclassification adjustment for net gains included in net income	(2		)	—			(2		)
Defined benefits post-retirement benefit plan:
Change in net actuarial loss	35			14			21
Total other comprehensive income	$	450		$	177		$	273

The components of accumulated other comprehensive income, net of income taxes, are as follows:

	March 31, 2012			December 31, 2011
Net unrealized gain on investment securities available-for-sale	$	20,973		$	20,533
Net actuarial loss on defined benefit post-retirement benefit plans	(1,479		)	(1,499		)
Net accumulated other comprehensive income	$	19,494		$	19,034

23

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(12) Fair Value Measurements

Financial assets and financial liabilities measured at fair value on a recurring basis are as follows:

			Fair Value Measurements at Reporting Date Using
	Balance as of 3/31/2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	1,088,446	$	—	$	1,088,446	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	866,280		—		866,280		—
Private mortgage-backed securities	710		—		710		—
Mortgage servicing rights	13,625		—		13,625		—

			Fair Value Measurements at Reporting Date Using
	Balance as of 12/31/2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	1,138,118	$	—	$	1,138,118	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	877,997		—		877,997		—
Private mortgage-backed securities	749		—		749		—
Mortgage servicing rights	11,910		—		11,910		—
Derivative liability contract	383		—		—		383

The following table reconciles the beginning and ending balances of the derivative liability contract measured at fair value on a recurring basis using significant unobservable (Level 3) inputs during the three months ended March 31, 2012 and 2011:

For the Three Months Ended March 31,	2012			2011
Balance, beginning of period	$	383		$	86
Accruals during the period	—			—
Cash payments during the period	(383		)	—
Balance, end of period	$	—		$	86

There were no transfers between levels of the fair value hierarchy during the three months ended March 31, 2012 or 2011.

24

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

The methodologies used by the Company in determining the fair values of each class of financial instruments are based primarily on the use of independent, market-based data to reflect a value that would be reasonably expected in an orderly transaction between market participants at the measurement date. The Company obtains fair value measurements for investment securities from an independent pricing service and evaluates mortgage servicing rights for impairment using an independent valuation service. The vendors chosen by the Company are widely recognized vendors whose evaluations support the pricing functions of financial institutions, investment and mutual funds, and portfolio managers. The Company has documented and evaluated the pricing methodologies used by the vendors and maintains internal processes that regularly test valuations. These internal processes include obtaining and reviewing available reports on internal controls, evaluating the prices for reasonableness given market changes, obtaining and evaluating the inputs used in the model for a sample of securities, investigating anomalies and confirming determinations through discussions with the vendor. For investment securities, if needed, a broker may be utilized to determine the reported fair value. Further details on the methods used to estimate the fair value of each class of financial instruments above are discussed below:

Investment Securities Available-for-Sale. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the investment's terms and conditions, among other things.

Mortgage Servicing Rights. Mortgage servicing rights are initially recorded at fair value based on comparable market quotes and are amortized in proportion to and over the period of estimated net servicing income. Mortgage servicing rights are evaluated quarterly for impairment using an independent valuation service. The valuation service utilizes discounted cash flow modeling techniques, which consider observable data that includes market consensus prepayment speeds and the predominant risk characteristics of the underlying loans including loan type, note rate and loan term. Management believes the significant inputs utilized in the valuation model are observable in the market.

Derivative Liability Contract. In conjunction with the sale of all of its Class B shares of Visa, Inc. (“Visa”) common stock in 2009, the Company entered into a derivative liability contract with the purchaser whereby the Company will make or receive cash payments based on subsequent changes in the conversion rate of the Class B shares into Class A shares of Visa. The conversion rate is dependent upon the resolution of certain litigation involving Visa U.S.A. Inc. card association or its affiliates. The fair value of the derivative liability contract is estimated utilizing an internal valuation model with significant unobservable inputs including the Company's expectations regarding the ultimate resolution of the Visa litigation and loss severity in the event of unfavorable litigation outcomes. The probability of unfavorable litigation outcomes and the estimation of loss severity is determined through review of Visa's press releases and public filings made with the Securities and Exchange Commission and managements' estimation of the effect of changes in litigation status on the value of the derivative liability contract.

Additionally, from time to time, certain assets are measured at fair value on a non-recurring basis. Adjustments to fair value generally result from the application of lower-of-cost-or-market accounting or write-downs of individual assets due to impairment. The following table presents information about the Company’s assets and liabilities measured at fair value on a non-recurring basis.

25

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
As of March 31, 2012
Impaired loans	$	76,188	$	—	$	—	$	76,188
Other real estate owned	16,720		—		—		16,720
As of December 31, 2011
Impaired loans	$	100,035	$	—	$	—	$	100,035
Other real estate owned	17,000		—		—		17,000

Impaired Loans. Collateralized impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from collateral. The impaired loans are reported at fair value through specific valuation allowance allocations. In addition, when it is determined that the fair value of an impaired loan is less than the recorded investment in the loan, the carrying value of the loan is adjusted to fair value through a charge to the allowance for loan losses. Collateral values are estimated using independent appraisals and management estimates of current market conditions. As of March 31, 2012, certain impaired loans with a carrying value of $142,545 were reduced by specific valuation allowance allocations of $31,033 and partial loan charge-offs of $35,324 resulting in a reported fair value of $76,188. As of December 31, 2011, certain impaired loans with a carrying value of $167,078 were reduced by specific valuation allowance allocations of $32,838 and partial loan charge-offs of $34,205 resulting in a reported fair value of $100,035.

OREO.The fair values of OREO are estimated using independent appraisals and management estimates of current market conditions. Upon initial recognition, write-downs based on the foreclosed asset's fair value at foreclosure are reported through charges to the allowance for loan losses. Periodically, the fair value of foreclosed assets is remeasured with any subsequent write-downs charged to OREO expense in the period in which they are identified. Write-downs of $578 during the three months ended March 31, 2012 included adjustments of $511 directly related to receipt of updated appraisals and adjustments of $67 based on management estimates of the current fair value of properties. Write-downs of $1,552 during the three months ended March 31, 2011 included adjustments of $10 directly related to receipt of updated appraisals and adjustments of $1,542 based on management estimates of the current fair value of properties.

Long-lived Assets to be Disposed of by Sale. Long-lived assets to be disposed of by sale are carried at the lower of carrying value or fair value less estimated costs to sell. The fair values of long-lived assets to be disposed of by sale are based upon observable market data and management estimates of current market conditions. As of March 31, 2012 and December 31, 2011, the Company had a long-lived asset to be disposed of by sale of $1,513 that was carried at cost.

In addition, mortgage loans held for sale are required to be measured at the lower of cost or fair value. The fair value of mortgage loans held for sale is based upon binding contracts or quotes or bids from third party investors. As of March 31, 2012 and December 31, 2011, all mortgage loans held for sale were recorded at cost.

The Company is required to disclose the fair value of financial instruments for which it is practical to estimate fair value. The methodologies for estimating the fair value of financial instruments that are measured at fair value on a recurring or non-recurring basis are discussed above. The methodologies for estimating the fair value of other financial instruments are discussed below. For financial instruments bearing a variable interest rate where no credit risk exists, it is presumed that recorded book values are reasonable estimates of fair value.

Financial Assets. Carrying values of cash, cash equivalents and accrued interest receivable approximate fair values due to the liquid and/or short-term nature of these instruments. Fair values for investment securities held-to-maturity are obtained from an independent pricing service, which considers observable data that may include dealer quotes,

26

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the investment’s terms and conditions, among other things. Fair values of fixed rate loans and variable rate loans that reprice on an infrequent basis are estimated by discounting future cash flows using current interest rates at which similar loans with similar terms would be made to borrowers of similar credit quality. Carrying values of variable rate loans that reprice frequently, and with no change in credit risk, approximate the fair values of these instruments.

Financial Liabilities. The fair values of demand deposits, savings accounts, securities sold under repurchase agreements and accrued interest payable are the amount payable on demand at the reporting date. The fair values of fixed-maturity certificates of deposit are estimated using external market rates currently offered for deposits with similar remaining maturities. The carrying values of the interest bearing demand notes to the United States Treasury are deemed an approximation of fair values due to the frequent repayment and repricing at market rates. The fair value of the derivative contract was estimated by discounting cash flows using assumptions regarding the expected outcome of related litigation. The floating rate term notes, floating rate subordinated debentures, floating rate subordinated term loan and unsecured demand notes bear interest at floating market rates and, as such, carrying amounts are deemed to approximate fair values. The fair values of notes payable to the FHLB, fixed rate subordinated term debt, fixed rate subordinated debentures and capital lease obligation are estimated by discounting future cash flows using current rates for advances with similar characteristics.

Commitments to Extend Credit and Standby Letters of Credit. The fair value of commitments to extend credit and standby letters of credit, based on fees currently charged to enter into similar agreements, is not significant.

The estimated fair values of financial instruments that are reported at amortized cost in the Company's consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

	March 31, 2012				December 31, 2011
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial assets:
Level 2 inputs:
Cash and cash equivalents	$	622,924	$	622,924	$	472,447	$	472,447
Investment securities available-for-sale	1,955,436		1,955,436		2,016,864		2,016,864
Investment securities held-to-maturity	158,070		166,932		152,781		161,877
Accrued interest receivable	30,407		30,407		31,974		31,974
Mortgage servicing rights, net	11,833		13,625		11,555		11,910
Net loans	4,042,714		4,022,554		4,073,968		4,064,718
Total financial assets	$	6,821,384	$	6,811,878	$	6,759,589	$	6,759,790
Financial liabilities:
Level 2 inputs:
Total deposits, excluding time deposits	$	4,383,432	$	4,383,432	$	4,269,631	$	4,269,631
Time deposits	1,527,402		1,534,876		1,557,340		1,565,558
Securities sold under repurchase agreements	491,058		491,058		516,243		516,243
Other borrowed funds	6		6		7		7
Accrued interest payable	8,255		8,255		8,123		8,123
Long-term debt	37,191		34,562		37,200		34,341
Subordinated debentures held by subsidiary trusts	123,715		110,196		123,715		102,525
Level 3 inputs:
Derivative contract	—		—		383		383
Total financial liabilities	$	6,571,059	$	6,562,385	$	6,512,642	$	6,496,811

27

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

(13) Recent Authoritative Accounting Guidance

ASU No. 2011-03, "Transfers and Servicing (Topic 860) - Reconsideration of Effective Control for Repurchase Agreements." Accounting Standards Update (“ASU”) No. 2011-03 is intended to improve financial reporting for repurchase agreements and other agreements that both entitle and obligate a transferor to repurchase or redeem financial assets before their maturity. ASU No. 2011-03 removes from the assessment of effective control (1) the criterion requiring the transferor to have the ability to repurchase or redeem the financial assets on substantially the agreed terms, even in the event of default by the transferee, and (2) the collateral maintenance implementation guidance related to that criterion. The provisions of ASU No. 2011-03 became effective for the Company on January 1, 2012 and did not impact the Company's consolidated financial statements, results of operations or liquidity.

ASU No. 2011-04, "Fair Value Measurements (Topic 820) - Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRSs." ASU No. 2011-04 amends Topic 820, "Fair Value Measurements and disclosures," to converge the fair value measurements guidance in U.S. generally accepted accounting principles and International Financial Reporting Standards. ASU 2011-04 clarifies the application of existing fair value measurement requirements, changes certain principles in Topic 820 and requires additional fair value disclosures. ASU No. 2011-04 became effective for the Company on January 1, 2012 and did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-05, “Comprehensive Income (Topic 220) - Presentation of Comprehensive Income.” ASU 2011-05 amends Topic 220, “Comprehensive Income,” to require that all non-owner changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. Additionally, ASU 2011-05 requires entities to present, on the face of the financial statements, reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement or statements where the components of net income and the components of other comprehensive income are presented. The option to present components of other comprehensive income as part of the statement of changes in stockholders’ equity was eliminated. ASU 2011-05 became effective for the Company on January 1, 2012; however, certain provisions related to the presentation of reclassification adjustments have been deferred by ASU 2011-12 “Comprehensive Income (Topic 220) - Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05,” as further discussed below. Adoption of the provisions of ASU 2011-05 did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-08, “Intangibles - Goodwill and Other (Topic 350) - Testing Goodwill for Impairment.” ASU 2011-08 amends Topic 350, “Intangibles - Goodwill and Other,” to give entities the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. ASU 2011-08 is effective for annual and interim impairment tests beginning after December 15, 2011, and will not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-11, “Balance Sheet (Topic 210) - “Disclosures about Offsetting Assets and Liabilities.” ASU 2011-11 amends Topic 210, “Balance Sheet,” to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sale and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. ASU 2011-11 is effective for annual and interim periods beginning on January 1, 2013, and is not expected to have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

28

FIRST INTERSTATE BANCSYSTEM, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in thousands, except share and per share data)

ASU 2011-12 “Comprehensive Income (Topic 220) - Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05.” ASU 2011-12 defers changes in ASU No. 2011-05 that relate to the presentation of reclassification adjustments to allow the FASB time to redeliberate whether to require presentation of such adjustments on the face of the financial statements to show the effects of reclassifications out of accumulated other comprehensive income on the components of net income and other comprehensive income. ASU 2011-12 allows entities to continue to report reclassifications out of accumulated other comprehensive income consistent with the presentation requirements in effect before ASU No. 2011-05. ASU 2011-12 became effective for the Company on January 1, 2012 and did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

(14) Subsequent Events

Subsequent events have been evaluated for potential recognition and disclosure through the date financial statements were filed with the Securities and Exchange Commission. No events requiring disclosure were identified.

29

Item 2.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2011, including the audited financial statements contained therein, filed with the Securities and Exchange Commission, or SEC.

When we refer to “we,” “our,” and “us” in this report, we mean First Interstate BancSystem, Inc. and our consolidated subsidiaries, unless the context indicates that we refer only to the parent company, First Interstate BancSystem, Inc.

Cautionary Note Regarding Forward-Looking Statements and Factors that Could Affect Future Results

This report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended, and Rule 3b-6 promulgated thereunder, that involve inherent risks and uncertainties. Any statements about our plans, objectives, expectations, strategies, beliefs, or future performance or events constitute forward-looking statements. Such statements are identified as those that include words or phrases such as “believes,” “expects,” “anticipates,” “plans,” “trend,” “objective,” “continue” or similar expressions or future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” “may” or similar expressions. Forward-looking statements involve known and unknown risks, uncertainties, assumptions, estimates and other important factors that could cause actual results to differ materially from any results, performance or events expressed or implied by such forward-looking statements. The following factors, among others, may cause actual results to differ materially from current expectations in the forward-looking statements, including those set forth in this report: credit losses; concentrations of real estate loans; economic and market developments, including inflation; commercial loan risk; adequacy of the allowance for loan losses; impairment of goodwill; changes in interest rates; access to low-cost funding sources; increases in deposit insurance premiums; inability to grow business; adverse economic conditions affecting Montana, Wyoming and western South Dakota; governmental regulation and changes in regulatory, tax and accounting rules and interpretations; sweeping changes in regulation of financial institutions due to passage of the Dodd-Frank Act; changes in or noncompliance with governmental regulations; effects of recent legislative and regulatory efforts to stabilize financial markets; dependence on the Company's management team; ability to attract and retain qualified employees; failure of technology; reliance on external vendors; disruption of vital infrastructure and other business interruptions; illiquidity in the credit markets; inability to meet liquidity requirements; lack of acquisition candidates; failure to manage growth; competition; inability to manage risks in turbulent and dynamic market conditions; ineffective internal operational controls; environmental remediation and other costs; failure to effectively implement technology-driven products and services; litigation pertaining to fiduciary responsibilities; capital required to support the Company's bank subsidiary; soundness of other financial institutions; impact of Basel III capital standards and forthcoming new capital rules proposed for U.S. banks; inability of our bank subsidiary to pay dividends; change in dividend policy; lack of public market for our Class A common stock; volatility of Class A common stock; voting control of Class B stockholders; decline in market price of Class A common stock; dilution as a result of future equity issuances; uninsured nature of any investment in Class A common stock; anti-takeover provisions; controlled company status; subordination of common stock to Company debt; uncertainties associated with introducing new products or lines of business; and, downgrade of the U.S. credit rating.

A more detailed discussion of each of the foregoing risks is included in the Company's Annual Report on Form 10-K for the year ended December 31, 2011, filed February 28, 2012. These factors and the other risk factors described in the Company's periodic and current reports filed with the SEC from time to time, however, are not necessarily all of the important factors that could cause the Company's actual results, performance or achievements to differ materially from those expressed in or implied by any of the Company's forward-looking statements. Other unknown or unpredictable factors also could harm the Company's results. Investors and others are encouraged to read the more detailed discussion of the Company's risks contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements set forth above. Forward-looking statements speak only as of the date they are made and we do not undertake or assume any obligation to update publicly any of these statements to reflect actual results, new information or future events, changes in assumptions or changes in other factors affecting forward-looking statements, except to the extent required by applicable laws. If we update one or more forward-looking statements, no inference should be drawn that we will make additional updates with respect to those or other forward-looking statements.

30

Executive Overview

We are a financial and bank holding company headquartered in Billings, Montana. As of March 31, 2012, we had consolidated assets of $7,394 million, deposits of $5,911 million, loans of $4,159 million and total stockholders’ equity of $779 million. We currently operate 71 banking offices in 42 communities located in Montana, Wyoming and western South Dakota. Through the Bank, we deliver a comprehensive range of banking products and services to individuals, businesses, municipalities and other entities throughout our market areas. Our customers participate in a wide variety of industries, including energy, tourism, agriculture, healthcare, professional services, education, governmental services, construction, mining, retail and wholesale trade.

Our Business

Our principal business activity is lending to and accepting deposits from individuals, businesses, municipalities and other entities. We derive our income principally from interest charged on loans and, to a lesser extent, from interest and dividends earned on investments. We also derive income from non-interest sources such as fees received in connection with various lending and deposit services; trust, employee benefit, investment and insurance services; mortgage loan originations, sales and servicing; merchant and electronic banking services; and from time to time, gains on sales of assets. Our principal expenses include interest expense on deposits and borrowings, operating expenses, provisions for loan losses and income tax expense.

Our loan portfolio consists of a mix of real estate, consumer, commercial, agricultural and other loans, including fixed and variable rate loans. Our real estate loans comprise commercial real estate, construction (including residential, commercial and land development loans), residential, agricultural and other real estate loans. Fluctuations in the loan portfolio are directly related to the economies of the communities we serve. While each loan originated generally must meet minimum underwriting standards established in our credit policies, lending officers are granted discretion within pre-approved limits in approving and pricing loans to assure that the banking offices are responsive to competitive issues and community needs in each market area. We fund our loan portfolio primarily with the core deposits from our customers, generally without utilizing brokered deposits and with minimal reliance on wholesale funding sources.

Recent Trends and Developments

Asset Quality

Non-performing assets decreased to $268 million, or 6.36% of total loans and OREO as of March 31, 2012 from $279 million, or 6.60% of total loans and OREO as of December 31, 2011, primarily due to loan charge-offs. Loan charge-offs, net of recoveries, totaled $8 million during the first quarter of 2012, as compared to $11 million during first quarter 2011. Net charge-offs are expected to remain high in future quarters as problem loans continue to work through the credit cycle.

Provisions for loan losses decreased $3.8 million, or 25.0%, to $11.3 million for the three months ended March 31, 2012, as compared to $15.0 million for the same period in 2011. Approximately 47% of our first quarter 2012 provision was attributable to specific reserves, compared to 41% during first quarter 2011. Decreases in the provision for loan losses during first quarter 2012, as compared to the same period in 2011, are reflective of continued improvement and stabilization of credit quality as evidenced by declining levels of non-performing and criticized loans.

Net Interest Margin

Our net interest margin ratio, on a fully taxable-equivalent, or FTE, basis, remained stable at 3.72% for the three months ended March 31, 2012, as compared to 3.73% for the same period in 2011, but decreased 7 basis points from 3.79% during fourth quarter 2011. Decreases in our net FTE net interest margin ratio during first quarter 2012, as compared to fourth quarter 2011 and first quarter 2011, were attributable to lower outstanding loan balances and lower yields earned on our loan and investment portfolios. These decreases were partially offset by reductions in funding costs and a continued shift from higher costing savings and time deposits to lower-costing demand deposits. Absent meaningful loan growth, management expects further compression in the net FTE interest margin ratio in future quarters.

31

Primary Factors Used in Evaluating Our Business

As a banking institution, we manage and evaluate various aspects of both our financial condition and our results of operations. We monitor our financial condition and performance on a monthly basis, at our holding company, at the Bank and at each banking office. We evaluate the levels and trends of the line items included in our balance sheet and statements of income, as well as various financial ratios that are commonly used in our industry. We analyze these ratios and financial trends against both our own historical levels and the financial condition and performance of comparable banking institutions in our region and nationally.

Results of Operations

Principal factors used in managing and evaluating our results of operations include return on average assets, net interest income, non-interest income, non-interest expense and net income. Net interest income is affected by the level of interest rates, changes in interest rates and changes in the composition of interest earning assets and interest bearing liabilities. The most significant impact on our net interest income between periods is derived from the interaction of changes in the rates earned or paid on interest earning assets and interest bearing liabilities, which we refer to as interest rate spread. The volume of loans, investment securities and other interest earning assets, compared to the volume of interest bearing deposits and indebtedness, combined with the interest rate spread, produces changes in our net interest income between periods. Non-interest bearing sources of funds, such as demand deposits and stockholders’ equity, also support earning assets. The impact of free funding sources is captured in the net interest margin, which is calculated as net interest income divided by average earning assets. Given the interest free nature of free funding sources, the net interest margin is generally higher than the interest rate spread. We seek to increase our net interest income over time and evaluate our net interest income on factors that include the yields on our loans and other earning assets, the costs of our deposits and other funding sources, the levels of our net interest spread and net interest margin and the provisions for loan losses required to maintain our allowance for loan losses at an adequate level.

We seek to increase our non-interest income over time and we evaluate our non-interest income relative to the trends of the individual types of non-interest income in view of prevailing market conditions.

We seek to manage our non-interest expenses in consideration of the growth of our business and our community banking model that emphasizes customer service and responsiveness. We evaluate our non-interest expense on factors that include our non-interest expense relative to our average assets, our efficiency ratio and the trends of the individual categories of non-interest expense.

Finally, we seek to increase our net income and provide favorable shareholder returns over time, and we evaluate our net income relative to the performance of other banks and bank holding companies on factors that include return on average assets, return on average equity, and consistency and rates of growth in our earnings.

Financial Condition

Principal areas of focus in managing and evaluating our financial condition include liquidity, the diversification and quality of our loans, the adequacy of our allowance for loan losses, the diversification and terms of our deposits and other funding sources, the re-pricing characteristics and maturities of our assets and liabilities, including potential interest rate exposure and the adequacy of our capital levels. We seek to maintain sufficient levels of cash and investment securities to meet potential payment and funding obligations, and we evaluate our liquidity on factors that include the levels of cash and highly liquid assets relative to our liabilities, the quality and maturities of our investment securities, the ratio of loans to deposits and any reliance on brokered certificates of deposit or other wholesale funding sources.

We seek to maintain a diverse and high quality loan portfolio and evaluate our asset quality on factors that include the allocation of our loans among loan types, credit exposure to any single borrower or industry type, non-performing assets as a percentage of total loans and OREO, and loan charge-offs as a percentage of average loans. We seek to maintain our allowance for loan losses at a level adequate to absorb probable losses inherent in our loan portfolio at each balance sheet date, and we evaluate the level of our allowance for loan losses relative to our overall loan portfolio and the level of non-performing loans and potential charge-offs.

We seek to fund our assets primarily using core customer deposits spread among various deposit categories, and we evaluate our deposit and funding mix on factors that include the allocation of our deposits among deposit types, the level of our non-interest bearing deposits, the ratio of our core deposits (i.e. excluding time deposits above $100,000) to our total deposits and our reliance on brokered deposits or other wholesale funding sources, such as borrowings from other banks or agencies. We

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seek to manage the mix, maturities and re-pricing characteristics of our assets and liabilities to maintain relative stability of our net interest rate margin in a changing interest rate environment, and we evaluate our asset-liability management using complex models to evaluate the changes to our net interest income under different interest rate scenarios.

Finally, we seek to maintain adequate capital levels to absorb unforeseen operating losses and to help support the growth of our balance sheet. We evaluate our capital adequacy using the regulatory and financial capital ratios including leverage capital ratio, tier 1 risk-based capital ratio, total risk-based capital ratio, tangible common equity to tangible assets and tier 1 common capital to total risk-weighted assets.

Critical Accounting Estimates and Significant Accounting Policies

Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States and follow general practices within the industries in which we operate. Application of these principles requires management to make estimates, assumptions and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. The most significant accounting policies we follow are summarized in Notes 1 of the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2011.

Our critical accounting estimates are summarized below. Management considers an accounting estimate to be critical if: (1) the accounting estimate requires management to make particularly difficult, subjective and/or complex judgments about matters that are inherently uncertain and (2) changes in the estimate that are reasonably likely to occur from period to period, or the use of different estimates that management could have reasonably used in the current period, would have a material impact on our consolidated financial statements, results of operations or liquidity.

Allowance for Loan Losses

The provision for loan losses creates an allowance for loan losses known and inherent in the loan portfolio at each balance sheet date. The allowance for loan losses represents management’s estimate of probable credit losses inherent in the loan portfolio.

We perform a quarterly assessment of the risks inherent in our loan portfolio, as well as a detailed review of each significant loan with identified weaknesses. Based on this analysis, we record a provision for loan losses in order to maintain the allowance for loan losses at appropriate levels. In determining the allowance for loan losses, we estimate losses on specific loans, or groups of loans, where the probable loss can be identified and reasonably determined. Determining the amount of the allowance for loan losses is considered a critical accounting estimate because it requires significant judgment and the use of subjective measurements, including management’s assessment of the internal risk classifications of loans, historical loan loss rates, changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends and the impact of current local, regional and national economic factors on the quality of the loan portfolio. Changes in these estimates and assumptions are possible and may have a material impact on our allowance, and therefore our consolidated financial statements or results of operations. The allowance for loan losses is maintained at an amount we believe is sufficient to provide for estimated losses inherent in our loan portfolio at each balance sheet date, and fluctuations in the provision for loan losses result from management’s assessment of the adequacy of the allowance for loan losses. Management monitors qualitative and quantitative trends in the loan portfolio, including changes in the levels of past due, internally classified and non-performing loans. Note 1 of the Notes to Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2011 describes the methodology used to determine the allowance for loan losses. A discussion of the factors driving changes in the amount of the allowance for loan losses is included herein under the heading “Asset Quality."

Goodwill

The excess purchase price over the fair value of net assets from acquisitions, or goodwill, is evaluated for impairment at least annually and on an interim basis if an event or circumstance indicates that it is likely impairment has occurred. In testing for impairment, the fair value of net assets is estimated based on an analysis of our market value, discounted cash flows and peer values. Determining the fair value of goodwill is considered a critical accounting estimate because of its sensitivity to market-based economics. In addition, any allocation of the fair value of goodwill to assets and liabilities requires significant management judgment and the use of subjective measurements. Variability in market conditions and key assumptions or subjective measurements used to estimate and allocate fair value are reasonably possible and could have a material impact on our consolidated financial statements or results of operations. Note 1 of the Notes to the Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2011 describes our accounting policy with regard to goodwill.

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Our annual impairment test is performed each year as of July 1st. During the last half of 2011, there was a significant and prolonged decrease in the market value of bank stocks, including our common stock. As a result, we engaged a third party valuation consultant to assist us in determining the fair value of our goodwill as of December 31, 2011. Based on this valuation, we determined that the fair value of our net assets was greater than the Company's carrying value and no impairment existed. We will continue to monitor our performance and evaluate our goodwill for impairment annually or more frequently as needed.

Other Real Estate Owned

Real estate acquired in satisfaction of loans is initially carried at current fair value less estimated selling costs. Any excess of loan carrying value over the fair value of the real estate acquired is recorded as a charge to the allowance for loan losses. Subsequent declines in fair value less estimated selling costs are included in OREO expense. Subsequent increases in fair value less estimated selling costs are recorded as a reduction in OREO expense to the extent of recognized losses. Determining the fair value of OREO is considered a critical accounting estimate due to the assets’ sensitivity to changes in estimates and assumptions used. Changes in these estimates and assumptions are reasonably possible and may have a material impact on our consolidated financial statements, liquidity or results of operations. Note 1 of the Notes to the Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2011 describes our accounting policy with regard to OREO.

Results of Operations

The following discussion and analysis is intended to provide greater details of the results of our operations and financial condition.

Net Interest Income. Although our net FTE interest margin ratio remained stable at 3.72% during first quarter 2012, as compared to 3.73% during the same period in 2011, our net interest income on a fully taxable equivalent, or FTE, basis, decreased $1.1 million, or 1.8%, to $61.8 million, as compared to $62.9 million during the same period in 2011.  This decrease is primarily attributable to the decrease in average interest earning assets.  Average interest earning assets decreased $158 million, or 2.3%, to $6.7 billion during the three months ended March 31, 2012, as compared to $6.8 billion during the same period in 2011. 

Our net FTE interest income decreased $2.3 million, or 3.6%, to $61.8 million, as compared to $64.1 million during the fourth quarter of 2011 and our net FTE interest margin ratio decreased 7 basis point to 3.72%, as compared to 3.79% during the fourth quarter of 2011.  Weak loan demand and lower interest rates earned on loans and investment securities caused the yield on interest earning assets to decline at a faster pace than the cost of our interest bearing liabilities, resulting in compression in the net FTE interest margin ratio and lower net FTE interest income during the first quarter of 2012, as compared to the fourth quarter of 2011. 

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The following table presents, for the periods indicated, condensed average balance sheet information, together with interest income and yields earned on average interest earning assets and interest expense and rates paid on average interest bearing liabilities.

Average Balance Sheets, Yields and Rates
(Dollars in thousands)	Three Months Ended March 31,
	2012							2011
	Average Balance		Interest			Average Rate		Average Balance		Interest			Average Rate
Interest earning assets:
Loans (1) (2)	$	4,165,203	$	58,374		5.64	%	$	4,303,575	$	62,836		5.92	%
Investment securities (2)	2,143,438		11,604			2.18		1,948,422		11,758			2.45
Interest bearing deposits in banks	374,899		237			0.25		587,804		367			0.25
Federal funds sold	609		1			0.66		2,242		3			0.54
Total interest earnings assets	6,684,149		70,216			4.23		6,842,043		74,964			4.44
Non-earning assets	619,137							622,539
Total assets	$	7,303,286						$	7,464,582
Interest bearing liabilities:
Demand deposits	$	1,582,805	$	646		0.16	%	$	1,249,283	$	834		0.27	%
Savings deposits	1,449,239		1,015			0.28		1,744,747		2,000			0.46
Time deposits	1,540,789		4,601			1.20		1,874,515		7,037			1.52
Repurchase agreements	513,407		156			0.12		569,881		237			0.17
Other borrowed funds	35		—			—		5,695		—			—
Long-term debt	37,194		498			5.39		37,496		489			5.29
Subordinated debentures held by subsidiary trusts	123,715		1,507			4.90		123,715		1,448			4.75
Total interest bearing liabilities	5,247,184		8,423			0.65		5,605,332		12,045			0.87
Non-interest bearing deposits	1,232,874							1,070,744
Other non-interest bearing liabilities	50,071							51,013
Stockholders’ equity	773,157							737,493
Total liabilities and stockholders’ equity	$	7,303,286						$	7,464,582
Net FTE interest income			$	61,793						$	62,919
Less FTE adjustments (2)			(1,159		)					(1,121		)
Net interest income from consolidated statements of income			$	60,634						$	61,798
Interest rate spread						3.58	%						3.57	%
Net FTE interest margin (3)						3.72	%						3.73	%
Cost of funds, including non-interest bearing demand deposits (4)						0.52	%						0.73	%

(1) Average loan balances include non-accrual loans. Interest income on loans includes amortization of deferred loan fees net of deferred loan costs, which is not material.

(2) Interest income and average rates for tax exempt loans and securities are presented on a FTE basis.

(3) Net FTE interest margin during the period equals (i) the difference between annualized interest income on interest earning assets and the annualized interest expense on interest bearing liabilities, divided by (ii) average interest earning assets for the period.

(4) Calculated by dividing total annualized interest on interest bearing liabilities by the sum of total interest bearing liabilities plus non-interest bearing deposits.

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The table below sets forth, for the periods indicated, a summary of the changes in interest income and interest expense resulting from estimated changes in average asset and liability balances (volume) and estimated changes in average interest rates (rate). Changes which are not due solely to volume or rate have been allocated to these categories based on the respective percent changes in average volume and average rate as they compare to each other.

Analysis of Interest Changes Due to Volume and Rates
(Dollars in thousands)	Three Months Ended March 31, 2012 compared with Three Months Ended March 31, 2011
	Volume			Rate			Net
Interest earning assets:
Loans (1)	$	(2,020	)	$	(2,442	)	$	(4,462	)
Investment securities (1)	1,177			(1,331		)	(154		)
Interest bearing deposits in banks	(133		)	3			(130		)
Federal funds sold	(2		)	—			(2		)
Total change	(978		)	(3,770		)	(4,748		)
Interest bearing liabilities:
Demand deposits	223			(411		)	(188		)
Savings deposits	(339		)	(646		)	(985		)
Time deposits	(1,253		)	(1,183		)	(2,436		)
Repurchase agreements	(23		)	(58		)	(81		)
Long-term debt	(4		)	13			9
Subordinated debentures	—			59			59
Total change	(1,396		)	(2,226		)	(3,622		)
Increase in FTE net interest income	$	418		$	(1,544	)	$	(1,126	)

(1)Interest income for tax exempt loans and securities are presented on a FTE basis.

Provision for Loan Losses. The provision for loan losses decreased $3.8 million, or 25.0%, to $11.3 million for the three months ended March 31, 2012, compared to $15.0 million for the same period in 2011, and decreased $2.5 million, or 18.2%, from $13.8 million during fourth quarter 2011. Decreases in the provision for loan losses during first quarter 2012, as compared to the same period in 2011 and the fourth quarter of 2011, are reflective of improvement and stabilization of credit quality as evidenced by declining levels of non-performing and criticized loans. For information regarding our non-performing loans, see “Non-Performing Assets” included herein.

Non-interest Income. Our principal sources of non-interest income include other service charges, commissions and fees; income from the origination and sale of loans; service charges on deposit accounts; and, wealth management revenues. Non-interest income increased $6.2 million, or 30.9%, to $26.4 million for the three months ended March 31, 2012, as compared to $20.2 million for the same period in 2011. Non-interest income decreased $615 thousand or 2.3%, to $26.4 million for the three months ended March 31, 2012, as compared to $27.0 million for the three months ended December 31, 2011. Significant components of these changes are discussed below.

Other service charges, commissions and fees primarily include debit and credit card interchange income, mortgage servicing fees, insurance and other commissions and ATM service charge revenues. Other service charges, commissions and fees increased $1.0 million, or 14.1%, to $8.4 million during the three months ended March 31, 2012, as compared to $7.4 million during the same period in 2011, primarily due to increases in credit card interchange fee income resulting from higher transaction volumes and increases in ATM service charges due to implementation of new fee schedules during third quarter 2011.

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Fluctuations in market interest rates have a significant impact on the level of income generated from the origination and sale of loans. Income from the origination and sale of loans increased $4.9 million, or 143.4%, to $8.4 million for the three months ended March 31, 2012, as compared to $3.4 million for the same period in 2011, and increased $297 thousand, or 3.7%, as compared to $8.1 million during fourth quarter 2011. Low mortgage interest rates continued to spur refinancing activity in our market areas during the first quarter of 2012, resulting in higher income from the origination and sale of loans compared to the first and fourth quarters of 2011. Refinancing activity accounted for approximately 71% of our residential real estate loan originations during first quarter 2012, as compared to 68% during fourth quarter 2011 and 56% during first quarter 2011.

Other income increased $172 thousand, or 8.9%, to $2.1 million for the three months ended March 31, 2012, compared to $1.9 million for the same period in 2011, and $459 thousand, or 28.0%, to $2.1 million for the three months ended March 31, 2012, as compared to $1.6 million for the three months ended December 31, 2011, primarily due to fluctuations in earnings on securities held under deferred compensation plans.

Non-interest Expense. Non-interest expense increased $4.5 million, or 8.5%, to $57.4 million for the three months ended March 31, 2012, as compared to $53.0 million for the same period in 2011, and increased $1.2 million, or 2.2%, to $57.4 million for the three months ended March 31, 2012, as compared to $56.2 million for the three months ended December 31, 2011. Significant components of these increases are discussed below.

Salaries and wages increased $1.4 million, or 6.7%, to $21.6 million during the three months ended March 31, 2012, as compared to $20.2 million during the same period in the prior year, primarily due to higher incentive bonus accruals, inflationary wage increases and one extra accrual day. These increases were partially offset by slight reductions in the number of full-time equivalent employees.

Salaries and wages decreased $438 thousand, or 2.0%, to $21.6 million during the three months ended March 31, 2012, as compared to $22.0 million during the three months ended December 31, 2011. This decrease was primarily due to lower incentive bonus accruals during first quarter 2012.

Employee benefits expense increased $1.5 million, or 19.6%, to $9.0 million during the three months ended March 31, 2012, as compared to $7.5 million for the same period in 2011, primarily due to increases in group health insurance costs, higher stock-based compensation expense and increases in the market value of securities held under deferred compensation plans.

Employee benefits expense increased $2.1 million, or 30.5%, to $9.0 million during the three months ended March 31, 2012, as compared to $6.9 million during the thee months ended December 31, 2011, primarily due to higher payroll tax expense and increases in the market value of securities held under deferred compensation plans.

FDIC insurance premiums decreased $871 thousand, or 35.3%, to $1.6 million during the three months ended March 31, 2012, as compared to $2.5 million for the same period in 2011. In February 2011, the FDIC issued a final rule that, among other things, modified the definition of an institution's deposit insurance assessment base and revised assessment rate schedules. These changes, which became effective April 1, 2011, resulted in a reduction in the Company's FDIC insurance premiums.

OREO expense, net of income, decreased $606 thousand, or 35.4%, to $1.1 million for the three months ended March 31, 2012, compared to $1.7 million for the same period in 2011, and decreased $916 thousand, or 45.3%, as compared to $2.0 million during the three months ended December 31, 2011. Variations in net OREO expense between periods were primarily due to fluctuations in write-downs of the estimated fair value of OREO properties. During the three months ended March 31, 2012, we wrote down the value of OREO properties by $578 thousand, as compared to write-downs of $1.6 million during first quarter 2011 and $1.5 million during fourth quarter 2011.

Mortgage servicing rights are evaluated quarterly for impairment. Fluctuations in the fair value of mortgage servicing rights are primarily due to changes in assumptions regarding prepayments of the underlying mortgage loans, which typically correspond with changes in market interest rates. During first quarter 2012, we reversed previously recorded impairment of $868 thousand, as compared to a reversal of previously recorded impairment of $347 thousand during first quarter 2011 and additional impairment of $427 thousand recorded during fourth quarter 2011.

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Other expenses primarily include professional fees; advertising and public relations costs; office supply, postage, freight and telephone expenses; travel expense; donations expense; debit and credit card expenses; board of director fees; and other losses. Other expenses increased $3.9 million, or 36.4%, to $14.4 million for the three months ended March 31, 2012, as compared to $10.6 million for the three months ended March 31, 2011, and increased $1.7 million, or 13.3%, as compared to $12.7 million during the three months ended December 31, 2011. These increases were primarily due to estimated collection and settlement costs of $3.0 million related to one borrower that were recorded as other expense during the three months ended March 31, 2012.

Income Tax Expense. Our effective federal income tax rate was 28.7% for the three months ended March 31, 2012 and 27.5% for the three months ended March 31, 2011. State income tax applies primarily to pretax earnings generated within Montana and South Dakota. Our effective state tax rate was 4.6% for the three months ended March 31, 2012 and March 31, 2011. Changes in effective federal and state income tax rates are primarily fluctuations in tax exempt interest income as a percentage of total income.

Financial Condition

Total assets increased $68 million, or less than 1.0%, to $7,394 million as of March 31, 2012, from $7,326 million as of December 31, 2011.

Loans. Total loans decreased $28 million, or less than 1.0%, to $4,159 million as of March 31, 2012 from $4,187 million as of December 31, 2011, with all major categories of loans showing decreases except commercial and agricultural loans. Decreases in total loans as of March 31, 2012, as compared to December 31, 2011, were primarily due to weak loan demand combined with movement of lower quality loans out of the loan portfolio through charge-off or foreclosure.

Non-performing Assets. Non-performing assets include non-accrual loans, loans contractually past due 90 days or more and still accruing interest, loans renegotiated in troubled debt restructurings and OREO. The following table sets forth information regarding non-performing assets as of the dates indicated:

Nonperforming Assets
(Dollars in thousands)	March 31, 2012			December 31, 2011		September 30, 2011		June 30, 2011		March 31, 2011
Non-performing loans:
Non-accrual loans	$	180,910		199,983		223,961		229,662		212,394
Accruing loans past due 90 days or more	5,017			4,111		3,001		2,194		4,140
Troubled debt restructurings	36,838			37,376		35,616		31,611		33,344
Total non-performing loans	222,765			241,470		262,578		263,467		249,878
OREO	44,756			37,452		25,080		28,323		31,995
Total non-performing assets	$	267,521		278,922		287,658		291,790		281,873
Non-performing loans to total loans	5.36		%	5.77	%	6.14	%	6.15	%	5.86	%
Non-performing assets to total loans and OREO	6.36		%	6.60	%	6.69	%	6.77	%	6.56	%
Non-performing assets to total assets	3.60		%	3.81	%	3.94	%	4.05	%	3.79	%

Non-performing loans. Non-performing loans include non-accrual loans, loans contractually past due 90 days or more and still accruing interest and loans renegotiated in troubled debt restructurings. Impaired loans are a subset of non-performing loans and include all loans risk rated doubtful, loans placed on non-accrual status and loans renegotiated in troubled debt restructurings with the exception of consumer loans. We monitor and evaluate collateral values on impaired loans quarterly. Appraisals are required on all impaired loans every 18-24 months, or sooner as conditions necessitate. We monitor real estate values by market for our larger market areas. Based on trends in real estate values, adjustments may be made to the appraised value based on time elapsed between the appraisal date and the impairment analysis or a new appraisal may be ordered. Appraised values in our smaller market areas may be adjusted based on trends identified through discussions with local realtors and appraisers. Appraisals are also adjusted for selling costs. The adjusted appraised value is then compared to the loan balance and any resulting shortfall is recorded in the allowance for loan losses as a specific valuation allowance. Overall increases in specific valuation allowances will result in higher provisions for loan losses. Provisions for loan losses are also impacted by changes in the historical or general valuation elements of the allowance for loan losses as well.

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The following table sets forth the allocation of our non-performing loans among our various loan categories as of the dates indicated:

Non-Performing Loans by Loan Type
(Dollars in thousands)	March 31, 2012		Percent of Total		December 31, 2011		Percent of Total
Real estate:
Commercial	$	90,293	40.5	%	$	86,990	36.0	%
Construction:
Land acquisition and development	60,911		27.4	%	63,195		26.2	%
Commercial	4,100		1.8	%	14,023		5.8	%
Residential	22,292		10.0	%	24,536		10.2	%
Total construction	87,303		39.2	%	101,754		42.2	%
Residential	17,939		8.1	%	20,075		8.3	%
Agricultural	7,028		3.2	%	7,470		3.1	%
Total real estate	202,563		91.0	%	216,289		89.6	%
Consumer	3,399		1.5	%	3,455		1.4	%
Commercial	14,936		6.7	%	20,857		8.6	%
Agricultural	1,867		0.8	%	869		0.4	%
Total non-performing loans	$	222,765	100.0	%	$	241,470	100.0	%

Non-accrual loans. We generally place loans on non-accrual when they become 90 days past due, unless they are well secured and in the process of collection. When a loan is placed on non-accrual status, any interest previously accrued but not collected is reversed from income. Approximately $2.7 million and $2.8 million of gross interest income would have been accrued if all loans on non-accrual had been current in accordance with their original terms for the three months ended March 31, 2012 and 2011, respectively.

Non-accrual loans, the largest component of non-performing loans, decreased $19 million, or 9.5%, to $181 million at March 31, 2012, from $200 million at December 31, 2011, primarily due to movement of non-accrual loans out of the loan portfolio due to charge-off or foreclosure. As of March 31, 2012, approximately 34% of our non-accrual loans were commercial real estate loans and approximately 32% were land acquisition and development loans.

Troubled Debt Restructuring. Modifications of performing loans are made on a case-by-case basis as negotiated with the borrower. Loan modifications typically include interest rate concessions, interest-only periods, short-term payment deferrals and extension of amortization periods to provide payment relief. A loan modification is considered a troubled debt restructuring if the borrower is experiencing financial difficulties and we, for economic or legal reasons, grant a concession to the borrower that we would not otherwise consider. Those modifications deemed to be troubled debt restructurings are monitored centrally to ensure proper classification as a troubled debt restructuring and if or when the loan may be placed on accrual status or removed from impaired loan status.

We had loans renegotiated in troubled debt restructurings of $89 million as of March 31, 2012, of which $52 million were included in non-accrual loans in the non-performing assets table above and $37 million were on accrual status and reported as troubled debt restructurings in the non-performing assets table above. As of March 31, 2012, approximately 74% of our loans restructured in troubled debt restucturings were performing in accordance with their modified terms.

OREO. OREO consists of real property acquired through foreclosure on the collateral underlying defaulted loans. We initially record OREO at fair value less estimated costs to sell by a charge against the allowance for loan losses. Estimated losses that result from the ongoing periodic valuation of these properties are charged to earnings in the period in which they are identified. The fair values of OREO properties are estimated using appraisals and management estimates of current market conditions. OREO properties are appraised every 18-24 months unless deterioration in local market conditions indicates the need to obtain new appraisals sooner. OREO properties are evaluated by management quarterly to determine if additional write-downs are appropriate or necessary based on current market conditions. Quarterly evaluations include a review of the

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most recent appraisal of the property and reviews of recent appraisals and comparable sales data for similar properties in the same or adjacent market areas. Commercial and agricultural OREO properties are listed with unrelated third party professional real estate agents or brokers local to the areas where the marketed properties are located. Residential properties are typically listed with local realtors, after any redemption period has expired. We rely on these local real estate agents and/or brokers to list the properties on the local multiple listing system, to provide marketing materials and advertisements for the properties and to conduct open houses.

OREO increased $7 million, or19.5%, to $45 million as of March 31, 2012 from $37 million as of December 31, 2011. During first quarter 2012, we recorded additions to OREO of $14 million, wrote down the fair value of OREO properties by $578 thousand and sold OREO with a book value of $6 million at a loss of $74 thousand. As of March 31, 2012, approximately 42% of our OREO was comprised of land and land development properties.

Allowance for Loan Losses

The Company performs a quarterly assessment of the adequacy of its allowance for loan losses in accordance with generally accepted accounting principles. The methodology used to assess the adequacy is consistently applied to the Company's loan portfolio. The allowance for loan losses is established through a provision for loan losses based on our evaluation of known and inherent risk in our loan portfolio at each balance sheet date. In determining the allowance for loan losses, we estimate losses on specific loans, or groups of loans, where the probable loss can be identified and reasonably determined. The balance of the allowance for loan losses is based on internally assigned risk classifications of loans, historical loan loss rates, changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends, current economic factors and the estimated impact of current economic conditions on certain historical loan loss rates. See the discussion under “Critical Accounting Estimates and Significant Accounting Policies — Allowance for Loan Losses” above.

The allowance for loan losses is increased by provisions charged against earnings and reduced by net loan charge-offs. Loans, or portions thereof, are charged-off when management believes that the collectibility of the principal is unlikely or, with respect to consumer installment and credit card loans, according to established delinquency schedules.

The allowance for loan losses consists of three elements:

(1) Specific valuation allowances associated with impaired loans. Specific valuation allowances are determined based on assessment of the fair value of the collateral underlying the loans as determined through independent appraisals, the present value of future cash flows, observable market prices and any relevant qualitative or environmental factors impacting the loan. No specific valuation allowances are recorded for impaired loans that are adequately secured.

(2) Historical valuation allowances based on loan loss experience for similar loans with similar characteristics and trends. Historical valuation allowances are determined by applying percentage loss factors to the credit exposures from outstanding loans. For commercial, agricultural and real estate loans, loss factors are applied based on the internal risk classifications of these loans. For consumer loans, loss factors are applied on a portfolio basis. For commercial, agriculture and real estate loans, loss factor percentages are based on a migration analysis of our historical loss experience, designed to account for credit deterioration. For consumer loans, loss factor percentages are based on a one-year loss history.

(3) General valuation allowances determined based on changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends, general economic conditions and other qualitative risk factors both internal and external to us.

Based on the assessment of the adequacy of the allowance for loan losses, management records provisions for loan losses to maintain the allowance for loan losses at appropriate levels.

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Loans, or portions thereof, are charged-off against the allowance for loan losses when management believes that the collectability of the principal is unlikely, or, with respect to consumer installment loans, according to an established delinquency schedule. Generally, loans are charged-off when (1) there has been no material principal reduction within the previous 90 days and there is no pending sale of collateral or other assets, (2) there is no significant or pending event which will result in principal reduction within the upcoming 90 days, (3) it is clear that we will not be able to collect all or a portion of the loan, (4) payments on the loan are sporadic, will result in an excessive amortization or are not consistent with the collateral held and (5) foreclosure or repossession actions are pending. Loan charge-offs do not directly correspond with the receipt of independent appraisals or the use of observable market data if the collateral value is determined to be sufficient to repay the principal balance of the loan.

If the impaired loan is adequately collateralized, a specific valuation allowance is not recorded. As such, significant changes in impaired and non-performing loans do not necessarily correspond proportionally with changes in the specific valuation component of the allowance for loan losses. Additionally, management expects the timing of charge-offs will vary between quarters and will not necessarily correspond proportionally to changes in the allowance for loan losses or changes in non-performing or impaired loans due to timing differences among the initial identification of an impaired loan, recording of a specific valuation allowance for the impaired loan and any resulting charge-off of uncollectible principal.

The following table sets forth information regarding our allowance for loan losses as of and for the periods indicated.

Allowance for Loan Losses
(Dollars in thousands)	Three Months Ended
	March 31,			December 31,		September 30,		June 30,		March 31,
	2012			2011		2011		2011		2011
Balance at beginning of period	$	112,581		120,303		124,579		124,446		120,480
Provision charged to operating expense	11,250			13,751		14,000		15,400		15,000
Charge offs:
Real estate
Commercial	681			2,972		4,064		5,005		1,186
Construction	2,571			9,178		7,997		7,404		1,546
Residential	1,825			3,803		149		748		1,499
Agricultural	79			213		—		—		—
Consumer	1,312			1,402		1,682		1,499		1,460
Commercial	2,512			4,785		6,498		1,407		6,642
Agricultural	107			82		15		39		6
Total charge-offs	9,087			22,435		20,405		16,102		12,339
Recoveries:
Real estate
Commercial	213			116		41		11		125
Construction	173			227		1,272		50		92
Residential	120			52		73		48		28
Agricultural	—			—		—		—		—
Consumer	521			384		453		470		432
Commercial	126			183		287		253		621
Agricultural	5			—		3		3		7
Total recoveries	1,158			962		2,129		835		1,305
Net charge-offs	7,929			21,473		18,276		15,267		11,034
Balance at end of period	$	115,902		112,581		120,303		124,579		124,446
Period end loans	$	4,158,616		4,186,549		4,275,717		4,281,260		4,263,764
Average loans	4,165,203			4,236,228		4,291,632		4,269,637		4,303,575
Annualized net loans charged off to average loans	0.76		%	2.01	%	1.69	%	1.43	%	1.04	%
Allowance to period end loans	2.79		%	2.69	%	2.81	%	2.91	%	2.92	%

41

Although we believe that we have established our allowance for loan losses in accordance with accounting principles generally accepted in the United States and that the allowance for loan losses was adequate to provide for known and inherent losses in the portfolio at all times, future provisions will be subject to on-going evaluations of the risks in the loan portfolio. If the economy declines or asset quality deteriorates, material additional provisions could be required.

Investment Securities. We manage our investment portfolio to obtain the highest yield possible, while meeting our risk tolerance and liquidity guidelines and satisfying the pledging requirements for deposits of state and political subdivisions and securities sold under repurchase agreements. Investment securities decreased $56 million, or 2.6%, to $2,114 million, or 28.6% of total assets, as of March 31, 2012, from $2,170 million, or 29.6% of total assets, as of December 31, 2011.

We evaluate our investment portfolio quarterly for other-than-temporary declines in the market value of individual investment securities. This evaluation includes monitoring credit ratings; market, industry and corporate news; volatility in market prices; and, determining whether the market value of a security has been below its cost for an extended period of time. As of March 31, 2012, we had investment securities with fair values of $900 thousand that had been in a continuous loss position more than twelve months. Gross unrealized losses on these securities totaled $29 thousand as of March 31, 2012, and were attributable to changes in interest rates. No impairment losses were recorded during the three months ended March 31, 2012 or 2011.

Deposits. Our deposits consist of non-interest bearing and interest bearing demand, savings, individual retirement and time deposit accounts. Total deposits increased $84 million, or 1.4%, to $5,911 million as of March 31, 2012, from $5,827 million as of December 31, 2011, with a shift in the mix of deposits away from higher-costing time deposits to lower-costing savings, interest bearing demand and non-interest bearing demand deposits.

The following table summarizes our deposits as of the dates indicated:

Deposits
(Dollars in thousands)	March 31, 2012		Percent of Total		December 31, 2011		Percent of Total
Non-interest bearing demand	$	1,284,823	21.7	%	$	1,271,709	21.8	%
Interest bearing:
Demand	1,618,174		27.4		1,306,509		22.4
Savings	1,480,435		25.0		1,691,413		29.0
Time, $100 and over	671,014		11.4		681,047		11.7
Time, other (1)	856,388		14.5		876,293		15.1
Total interest bearing	4,626,011		78.3		4,555,262		78.2
Total deposits	$	5,910,834	100.0	%	$	5,826,971	100.0	%

(1) Included in Time, other are Certificate of Deposit Account Registry Service, or CDAR, deposits of $87 million as of March 31, 2012 and $98 million as of December 31, 2011.

Interest bearing demand deposits increased $312 million, or 23.9%, to $1,618 million as of March 31, 2012 from $1,307 million as of December 31, 2011. Savings deposits decreased $211 million, or 12.5%, to $1,480 million as of March 31, 2012 from $1,691 million as of December 31, 2012. As a result of a regulatory change allowing businesses to receive interest on checking accounts, the Company discontinued its savings sweep product resulting in a shift of approximately $300 million from savings deposits into demand deposits during first quarter 2012.

Capital Resources and Liquidity Management

Stockholders’ equity is influenced primarily by earnings, dividends, changes in the unrealized holding gains or losses, net of taxes, on available-for-sale investment securities and sales and redemptions of common stock. Stockholders’ equity increased $8 million, or 1.1% to $779 million as of March 31, 2012, from $771 million as of December 31, 2011, primarily due to the retention of earnings.

42

On March 23, 2012, we declared a quarterly dividend to common stockholders of $0.12 per share paid on April 18, 2012 to shareholders of record as of April 4, 2012. During first quarter 2012, we paid aggregate cash dividends of $5.1 million, or $0.12 per share, to common stockholders, as compared to aggregate cash dividends of $4.8 million, or $0.1125 per share, to common shareholders during the same period in 2011. In addition, we paid dividends of $853 thousand to preferred stockholders during the first quarter of 2012, as compared to $844 thousand during the first quarter of 2011.

Pursuant to the Federal Deposit Insurance Corporation Improvement Act, the Federal Reserve and FDIC have adopted regulations setting forth a five-tier system for measuring the capital adequacy of the financial institutions they supervise. As of March 31, 2012 and December 31, 2011, the Bank had capital levels that, in all cases, exceeded the well-capitalized guidelines. As of March 31, 2012, we had consolidated leverage, tier 1 and total risk-based capital ratios of 10.01%, 14.90% and 16.89%, respectively, as compared to 9.84%, 14.55% and 16.54%, respectively, as of December 31, 2011.

On April 23, 2012, we announced our intention to redeem $41 million of junior subordinated deferrable interest debentures, or subordinated debentures, maturing March 26, 2033 and bearing a cumulative floating interest rate equal to LIBOR plus 3.15% per annum. Redemption of the subordinated debentures will cause a mandatory redemption of 40,000 floating rate mandatorily redeemable capital trust preferred securities and all common securities issued by First Interstate Statutory Trust I, a wholly-owned unconsolidated business trust sponsored by us. The redemption is expected to occur on June 26, 2012.

Liquidity. Liquidity measures our ability to meet current and future cash flow needs on a timely basis and at a reasonable cost. We manage our liquidity position to meet the daily cash flow needs of customers, while maintaining an appropriate balance between assets and liabilities to meet the return on investment objectives of our shareholders. Our liquidity position is supported by management of liquid assets and liabilities and access to alternative sources of funds. Liquid assets include cash, interest bearing deposits in banks, federal funds sold, available-for-sale investment securities and maturing or prepaying balances in our held-to-maturity investment and loan portfolios. Liquid liabilities include core deposits, federal funds purchased, securities sold under repurchase agreements and borrowings. Other sources of liquidity include the sale of loans, the ability to acquire additional national market, non-core deposits, the issuance of additional collateralized borrowings such as FHLB advances, the issuance of debt securities, additional borrowings through the Federal Reserve’s discount window and the issuance of preferred or common securities.

Our short-term and long-term liquidity requirements are primarily to fund on-going operations, including payment of interest on deposits and debt, extensions of credit to borrowers, capital expenditures and shareholder dividends. These liquidity requirements are met primarily through cash flow from operations, redeployment of prepaying and maturing balances in our loan and investment portfolios, debt financing and increases in customer deposits. For additional information regarding our operating, investing and financing cash flows, see the unaudited “Consolidated Statements of Cash Flows,” included in Part I, Item 1.

As a holding company, we are a corporation separate and apart from the Bank and, therefore, we provide for our own liquidity. Our main sources of funding include management fees and dividends declared and paid by the Bank and access to capital markets. There are statutory, regulatory and debt covenant limitations that affect the ability of our subsidiary bank to pay dividends to us. Management believes that such limitations will not impact our ability to meet our ongoing short-term cash obligations.

Management continuously monitors our liquidity position and adjustments are made to the balance between sources and uses of funds as deemed appropriate. Our management is not aware of any events that are reasonably likely to have a material adverse effect on our liquidity, capital resources or operations. In addition, our management is not aware of any regulatory recommendations regarding liquidity, which if implemented, would have a material adverse effect on us.

Recent Accounting Pronouncements

See “Note 13 – Authoritative Accounting Guidance” in the accompanying “Notes to Unaudited Consolidated Financial Statements” included in this report for details of recently issued accounting pronouncements and their expected impact on our financial statements.

43

Item 3.

QUANTITATIVE AND QUALITATIVE DISCLOSURES

ABOUT MARKET RISK

As of March 31, 2012, there have been no material changes in the quantitative and qualitative information about market risk provided pursuant to Item 305 of Regulation S-K as presented in our Annual Report on Form 10-K for the year ended December 31, 2011.

Item 4.

CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

Our management is responsible for establishing and maintaining effective disclosure controls and procedures, as defined under Rules 13a-15(e) and 15d-15(e) of the Exchange Act. As of March 31, 2012, an evaluation was performed, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of March 31, 2012, were effective in ensuring that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized, and reported within the time periods required by the SEC’s rules and forms, and is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting for the quarter ended March 31, 2012, that have materially affected, or are reasonably likely to materially affect, such control.

Limitations on Controls and Procedures

The effectiveness of our disclosure controls and procedures and our internal control over financial reporting is subject to various inherent limitations, including cost limitations, judgments used in decision making, assumptions about the likelihood of future events, the soundness of our systems, the possibility of human error, and the risk of fraud. Moreover, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions and the risk that the degree of compliance with policies or procedures may deteriorate over time. Because of these limitations, any system of disclosure controls and procedures or internal control over financial reporting may not be successful in preventing all errors or fraud or in making all material information known in a timely manner to the appropriate levels of management.

PART II.

OTHER INFORMATION

Item 1. Legal Proceedings

There have been no material changes in legal proceedings as described in our Annual Report on Form 10-K for the year ended December 31, 2011.

Item 1A. Risk Factors

There have been no material changes in risk factors described in our Annual Report on Form 10-K for the year ended December 31, 2011.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) There were no unregistered sales of equity securities during the three months ended March 31, 2012.

(b) Not applicable.

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(c) The following table provides information with respect to purchases made by or on behalf of us or any “affiliated purchasers” (as defined in Rule 10b-18(a)(3) under the Exchange Act), of our common stock during the three months ended March 31, 2012.

Period	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
January 2012	—	$	—	—	Not Applicable
February 2012	16,894	14.33		—	Not Applicable
March 2012	1,010	13.74		—	Not Applicable
Total	17,904	$	14.30	—	Not Applicable

 (1) Represents shares purchased by the Company in satisfaction of minimum required income tax withholding requirements pursuant to the vesting of restricted stock.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Not applicable or required.

Item 6. Exhibits

2.1	Stock Purchase Agreement dated as of September 18, 2007, by and between First Interstate BancSystem, Inc. and First Western Bancorp, Inc. (incorporated herein by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed on September 19, 2007)
2.2	First Amendment to Stock Purchase Agreement dated as of January 10, 2008, between First Interstate BancSystem, Inc. and Christen Group, Inc. formerly known as First Western Bancorp, Inc. (incorporated herein by reference to Exhibit 10.20 of the Company’s Current Report on Form 8-K filed on January 16, 2008)
3.1	Amended and Restated Articles of Incorporation dated March 5, 2010 (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K/A filed on March 10, 2010)
3.2	Second Amended and Restated Bylaws dated January 27, 2011 (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K/A filed on February 3, 2011)
4.1	Specimen of Series A preferred stock certificate of First Interstate BancSystem, Inc. (incorporated herein by reference to Exhibit 4.2 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007)
10.1	Credit Agreement Re: Subordinated Term Note dated as of January 10, 2008, between First Interstate BancSystem, Inc. and First Midwest Bank (incorporated herein by reference to Exhibit 10.24 of the Company’s Current Report on Form 8-K filed on January 16, 2008)
10.2	Lease Agreement between Billings 401 Joint Venture and First Interstate Bank Montana dated September 20, 1985 and addendum thereto (incorporated herein by reference to Exhibit 10.4 of the Company’s Post-Effective Amendment No. 3 to Registration Statement on Form S-1, No. 033-84540, filed on September 29, 1994)
10.3†	First Interstate BancSystem’s Deferred Compensation Plan dated December 1, 2006 (incorporated herein by reference to Exhibit 10.9 of the Company’s Pre-Effective Amendment No. 3 to Registration Statement on Form S-1, No. 333-164380, filed on March 23, 2010)
10.4†	First Amendment to the First Interstate BancSystem’s Deferred Compensation Plan dated October 24, 2008 (incorporated herein by reference to Exhibit 10.10 of the Company’s Pre-Effective Amendment No. 3 to Registration Statement on Form S-1, No. 333-164380, filed on March 23, 2010)

45

10.5†	2001 Stock Option Plan (incorporated herein by reference to Exhibit 4.12 of the Company’s Registration Statement on Form S-8, No. 333-106495, filed on June 25, 2003)
10.6†	Second Amendment to 2001 Stock Option Plan (incorporated herein by reference to Exhibit 10.6 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010)
10.7†	First Interstate BancSystem, Inc. 2006 Equity Compensation Plan (incorporated herein by reference to Appendix A of the Company’s 2006 Definitive Proxy Statement of Schedule 14A)
10.8†	Amendment to First Interstate BancSystem, Inc. 2006 Equity Compensation Plan (incorporated herein by reference to Exhibit 10.1 of the Company’s Current Report on Form 8-K filed on March 22, 2010)
10.9†	Second Amendment to First Interstate BancSystem, Inc. 2006 Equity Compensation Plan (incorporated herein by reference to Exhibit 10.9 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010)
10.10	Trademark License Agreements between Wells Fargo & Company and First Interstate BancSystem, Inc. (incorporated herein by reference to Exhibit 10.11 of the Company’s Registration Statement on Form S-1, No. 333-25633 filed on April 22, 1997)
31.1*	Certification of Quarterly Report on Form 10-Q pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by Chief Executive Officer
31.2*	Certification of Quarterly Report on Form 10-Q pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by Chief Financial Officer
32*	Certification of Quarterly Report on Form 10-Q pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101**	Interactive data file

 ________________________

† Management contract or compensatory arrangement.

* Filed herewith.

** As provided in Rule 406T of Regulation S-T, this information is furnished and not filed for purposes of Sections 11 and 12 of the Securities Act of 1933 and Section 18 of the Securities Exchange Act of 1934.

46

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	FIRST INTERSTATE BANCSYSTEM, INC.
Date May 9, 2012	/S/    EDWARD GARDING
	Edward Garding
	President and Chief Executive Officer
Date May 9, 2012	/S/    TERRILL R. MOORE
	Terrill R. Moore
	Executive Vice President and Chief Financial Officer

47

EX-31.1

Exhibit 31.1

CERTIFICATION OF QUARTERLY REPORT ON FORM 10-Q

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Edward Garding, certify that :

1. I have reviewed this quarterly report on Form 10-Q of First Interstate BancSystem, Inc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes, as of the end of the period covered by this report based on such evaluation; and

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions);

a. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

DATE: May 9, 2012

/s/ EDWARD GARDING

Edward Garding

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF QUARTERLY REPORT ON FORM 10-Q

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Terrill R. Moore, certify that :

1. I have reviewed this quarterly report on Form 10-Q of First Interstate BancSystem, Inc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes, as of the end of the period covered by this report based on such evaluation; and

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions);

a. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

DATE: May 9, 2012

/s/ TERRILL R. MOORE

Terrill R. Moore

Executive Vice President and Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned are the Chief Executive Officer and the Chief Financial Officer of First Interstate BancSystem, Inc. (the “Registrant”). This Certification is made pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. This Certification accompanies the Quarterly Report on Form 10-Q of the Registrant for the quarter ended March 31, 2012.

We certify that such Quarterly Report on Form 10-Q fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

This Certification is executed as of May 9, 2012.

/s/ EDWARD GARDING

Edward Garding

President and Chief Executive Officer

/s/ TERRILL R. MOORE

Terrill R. Moore

Executive Vice President and Chief Financial Officer

Chief Financial Officer

XML

Basis of Presentation

3 Months Ended

Mar. 31, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

In the opinion of management, the accompanying unaudited consolidated financial statements of First Interstate BancSystem, Inc. and subsidiaries (the “Company”) contain all adjustments (all of which are of a normal recurring nature) necessary to present fairly the financial position of the Company at March 31, 2012 and December 31, 2011 and the results of operations and cash flows for each of the three month periods ended March 31, 2012 and 2011, in conformity with U.S. generally accepted accounting principles. The balance sheet information at December 31, 2011 is derived from audited consolidated financial statements. Certain reclassifications, none of which were material, have been made to conform prior year financial statements to the March 31, 2012 presentation. These reclassifications did not change previously reported net income or stockholders’ equity.

These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. Operating results for the three months ended March 31, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012.

XML

Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 12,214	$ 9,506
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	11,250	15,000
Net loss on disposal of property and equipment	42	3
Depreciation and amortization	4,302	4,436
Net premium amortization on investment securities	2,678	2,598
Net gains on investment securities transactions	(31)	(2)
Net gains on sales of mortgage loans held for sale	(5,927)	(2,260)
Net loss (gain) on sale of OREO	74	(156)
Write-down of OREO	578	1,552
Net reversal of impairment of mortgage servicing rights	(868)	(347)
Net gain on sale of mortgage servicing rights	(19)	0
Deferred income tax benefit	(282)	(859)
Net increase in cash surrender value of company-owned life insurance policies	(462)	(489)
Stock-based compensation expense	643	411
Tax benefits from stock-based compensation expense	114	257
Excess tax benefits from stock-based compensation	(94)	(192)
Originations of mortgage loans held for sale, net of sales	(272)	27,123
Changes in operating assets and liabilities:
Increase in interest receivable	1,567	1,248
Decrease in other assets	907	7,828
Increase (decrease) in accrued interest payable	132	(1,016)
Increase in accounts payable and accrued expenses	1,744	1,702
Net cash provided by operating activities	28,290	66,343
Cash flows from investing activities:
Purchases of held-to-maturity investment securities	(7,592)	(1,868)
Purchases of available-for-sale investment securities	(222,413)	(193,791)
Proceeds from maturities and paydowns of held-to-maturity investment securities	2,193	2,720
Proceeds from maturities and paydowns of available-for-sale investment securities	282,083	136,839
Proceeds from sales of mortgage servicing rights	907	0
Extensions of credit to customers, net of repayments	10,027	64,419
Recoveries of loans charged-off	1,158	1,305
Proceeds from sales of OREO	5,691	3,160
Capital expenditures, net of sales	(3,453)	(1,639)
Net cash provided by investing activities	68,601	11,145
Cash flows from financing activities:
Net increase in deposits	83,863	5,471
Net decrease in repurchase agreements	(25,185)	(83,199)
Net increase (decrease) in short-term borrowings	(1)	531
Repayments of long-term debt	(9)	(11)
Proceeds from issuance of common stock	1,068	37
Excess tax benefits from stock-based compensation	94	192
Purchase and retirement of common stock	(256)	(164)
Dividends paid to common stockholders	(5,135)	(4,798)
Dividends paid to preferred stockholders	(853)	(844)
Net cash (used in) provided by financing activities	53,586	(82,785)
Net increase (decrease) in cash and cash equivalents	150,477	(5,297)
Cash and cash equivalents at beginning of period	472,447	685,618
Cash and cash equivalents at end of period	622,924	680,321
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes	100	0
Cash paid during the period for interest expense	$ 8,291	$ 13,061

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Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 128,341	$ 142,502
Federal funds sold	304	309
Interest bearing deposits in banks	494,279	329,636
Total cash and cash equivalents	622,924	472,447
Investment securities:
Available-for-sale	1,955,436	2,016,864
Held-to-maturity (estimated fair values of $166,932 and $161,877 at March 31, 2012 and December 31, 2011, respectively)	158,070	152,781
Total investment securities	2,113,506	2,169,645
Loans held for investment	4,099,936	4,133,028
Mortgage loans held for sale	58,680	53,521
Total loans	4,158,616	4,186,549
Less allowance for loan losses	115,902	112,581
Net loans	4,042,714	4,073,968
Premises and equipment, net of accumulated depreciation	185,230	184,771
Goodwill	183,673	183,673
Company-owned life insurance	75,342	74,880
Other real estate owned (OREO)	44,756	37,452
Accrued interest receivable	30,407	31,974
Mortgage servicing rights, net of accumulated amortization and impairment reserve	11,833	11,555
Deferred tax asset, net	9,571	9,628
Core deposit intangibles, net of accumulated amortization	7,002	7,357
Other assets	67,348	68,177
Total assets	7,394,306	7,325,527
Deposits:
Non-interest bearing	1,284,823	1,271,709
Interest bearing	4,626,011	4,555,262
Total deposits	5,910,834	5,826,971
Securities sold under repurchase agreements	491,058	516,243
Accounts payable and accrued expenses	43,972	42,248
Accrued interest payable	8,255	8,123
Long-term debt	37,191	37,200
Other borrowed funds	6	7
Subordinated debentures held by subsidiary trusts	123,715	123,715
Total liabilities	6,615,031	6,554,507
Stockholders' equity:
Nonvoting noncumulative preferred stock without par value; authorized 100,000 shares; issued and outstanding 5,000 shares as of March 31, 2012 and December 31, 2011	50,000	50,000
Common stock	268,411	266,842
Retained earnings	441,370	435,144
Accumulated other comprehensive income, net	19,494	19,034
Total stockholders' equity	779,275	771,020
Total liabilities and stockholders' equity	$ 7,394,306	$ 7,325,527

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Consolidated Statements of Changes in Stockholders Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Preferred stock	Common stock	Retained earnings	Accumulated other comprehensive income
Beginning Balance at Dec. 31, 2010	$ 736,802	$ 50,000	$ 264,174	$ 413,253	$ 9,375
Comprehensive income:
Net income	9,506	0	0	9,506	0
Other comprehensive income, net of tax	273	0	0	0	273
Common stock transactions:
Common shares purchased and retired 17,904 and 12,056 in 2012 and 2011 respectively	(164)	0	(164)	0	0
Non-vested common shares issued 122,912 and 130,904 in 2012 and 2011 respectively	0	0	0	0	0
1,556 and 1,911 non-vested common shares forfeited in 2012 and 2011 respectively	(7)	0	(7)	0	0
Non-vested liability awards vesting during period	195	0	195	0	0
100,991 and 43,622 stock options exercised, net of 37,397 and 104,050 shares tendered in payment of option price and income tax withholding amounts in 2012 and 2011 respectively	37	0	37	0	0
Tax benefit of stock-based compensation	257	0	257	0	0
Stock-based compensation expense	440	0	440	0	0
Cash dividends declared:
Common ($0.12 and $0.1125 per share in 2012 and 2011 respectively)	(4,798)	0	0	(4,798)	0
Preferred (6.75% per share in 2012 and 2011)	(844)	0	0	(844)	0
Ending Balance at Mar. 31, 2011	741,697	50,000	264,932	417,117	9,648
Beginning Balance at Dec. 31, 2011	771,020	50,000	266,842	435,144	19,034
Comprehensive income:
Net income	12,214	0	0	12,214	0
Other comprehensive income, net of tax	460	0	0	0	460
Common stock transactions:
Common shares purchased and retired 17,904 and 12,056 in 2012 and 2011 respectively	(256)	0	(256)	0	0
Common shares issued 2,358 and 0 in 2012 and 2011 respectively	0	0	0	0	0
Non-vested common shares issued 122,912 and 130,904 in 2012 and 2011 respectively	0	0	0	0	0
1,556 and 1,911 non-vested common shares forfeited in 2012 and 2011 respectively	0	0	0	0	0
100,991 and 43,622 stock options exercised, net of 37,397 and 104,050 shares tendered in payment of option price and income tax withholding amounts in 2012 and 2011 respectively	1,068	0	1,068	0	0
Tax benefit of stock-based compensation	114	0	114	0	0
Stock-based compensation expense	643	0	643	0	0
Cash dividends declared:
Common ($0.12 and $0.1125 per share in 2012 and 2011 respectively)	(5,135)	0	0	(5,135)	0
Preferred (6.75% per share in 2012 and 2011)	(853)	0	0	(853)	0
Ending Balance at Mar. 31, 2012	$ 779,275	$ 50,000	$ 268,411	$ 441,370	$ 19,494

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Subsequent Events

3 Months Ended

Mar. 31, 2012

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Subsequent events have been evaluated for potential recognition and disclosure through the date financial statements were filed with the Securities and Exchange Commission. No events requiring disclosure were identified.

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Consolidated Statements of Changes in Stockholders Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Common stock transactions:
Common shares purchased and retired	17,904	12,056
Common shares issued	2,358	0
Non-vested common shares issued	122,912	130,904
Non-vested common shares forfeited	1,556	1,911
Stock options exercised	100,991	43,622
Shares tendered in payment of option price and income tax withholding amounts	37,397	104,050
Cash dividends declared:
Common	$ 0.12	$ 0.1125
Preferred	6.75%	6.75%

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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Investment securities:
Held-to-maturity, fair values	$ 166,932	$ 161,877
Stockholders' equity:
Nonvoting noncumulative preferred stock, par value
Nonvoting noncumulative preferred stock, authorized shares	100,000	100,000
Nonvoting noncumulative preferred stock, issued shares	5,000	5,000
Nonvoting noncumulative preferred stock, outstanding shares	5,000	5,000

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Financial Instruments with Off-Balance Sheet Risk

3 Months Ended

Mar. 31, 2012

Financial Instruments with Off-Balance Sheet Risk [Abstract]

Financial Instruments with Off-Balance Sheet Risk

Financial Instruments with Off-Balance Sheet Risk

The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the commitment contract. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. At March 31, 2012, commitments to extend credit to existing and new borrowers approximated $1,060,546, which includes $292,820 on unused credit card lines and $279,923 with commitment maturities beyond one year.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. At March 31, 2012, the Company had outstanding standby letters of credit of $66,522. The estimated fair value of the obligation undertaken by the Company in issuing the standby letters of credit is included in other liabilities in the Company’s consolidated balance sheet.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2012
Entity Registrant Name	FIRST INTERSTATE BANCSYSTEM INC
Entity Central Index Key	0000860413
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Entity Common Stock, Shares Outstanding	16,758,066
Class B Common Stock
Entity Common Stock, Shares Outstanding	26,432,909

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Supplemental Disclosures to Consolidated Statement of Cash Flows

3 Months Ended

Mar. 31, 2012

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosures to Consolidated Statement of Cash Flows

Supplemental Disclosures to Consolidated Statement of Cash Flows

The Company transferred loans of $13,978 and $1,971 to OREO during the three months ended March 31, 2012 and 2011, respectively.

The Company transferred accrued liabilities of $195 to common stock in conjunction with the vesting of liability-classified non-vested stock awards during the three months ended March 31, 2011.

The Company transferred internally originated mortgage servicing rights of $1,040 and $553 from loans to mortgage servicing assets during the three months ended March 31, 2012 and 2011, respectively.

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Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Interest income:
Interest and fees on loans	$ 57,910	$ 62,391
Interest and dividends on investment securities:
Taxable	9,705	9,911
Exempt from federal taxes	1,204	1,171
Interest on deposits in banks	237	367
Interest on federal funds sold	1	3
Total interest income	69,057	73,843
Interest expense:
Interest on deposits	6,262	9,871
Interest on securities sold under repurchase agreements	156	237
Interest on long-term debt	498	489
Interest on subordinated debentures held by subsidiary trusts	1,507	1,448
Total interest expense	8,423	12,045
Net interest income	60,634	61,798
Provision for loan losses	11,250	15,000
Net interest income after provision for loan losses	49,384	46,798
Non-interest income:
Other service charges, commissions and fees	8,424	7,380
Income from the origination and sale of loans	8,384	3,445
Service charges on deposit accounts	4,161	4,110
Wealth management revenues	3,283	3,295
Investment securities gains, net	31	2
Other income	2,099	1,927
Total non-interest income	26,382	20,159
Non-interest expense:
Salaries and wages	21,564	20,203
Employee benefits	8,966	7,499
Occupancy, net	3,988	4,215
Furniture and equipment	3,138	3,220
Outsourced technology services	2,266	2,241
FDIC insurance premiums	1,595	2,466
OREO expense, net of income	1,105	1,711
Mortgage servicing rights amortization	895	807
Mortgage servicing rights impairment recovery	(868)	(347)
Core deposit intangibles amortization	355	362
Other expenses	14,436	10,581
Total non-interest expense	57,440	52,958
Income before income tax expense	18,326	13,999
Income tax expense	6,112	4,493
Net income	12,214	9,506
Preferred stock dividends	853	844
Net income available to common stockholders	$ 11,361	$ 8,662
Basic earnings per common share	$ 0.26	$ 0.20
Diluted earnings per common share	$ 0.26	$ 0.20

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Allowance For Loan Losses

3 Months Ended

Mar. 31, 2012

Receivables [Abstract]

Allowance For Loan Losses

Allowance For Loan Losses

The following tables present a summary of changes in the allowance for loan losses by portfolio segment for the periods indicated.

Three months ended March 31, 2012	Real Estate			Consumer			Commercial			Agriculture			Other		Total
Allowance for loan losses:
Beginning balance	$	87,396		$	8,594		$	15,325		$	1,266		$	—	$	112,581
Provision charged to operating expense	6,382			(591		)	5,441			18			—		11,250
Less loans charged-off	(5,156		)	(1,312		)	(2,512		)	(107		)	—		(9,087		)
Add back recoveries of loans previously charged-off	506			521			126			5			—		1,158
Ending balance	$	89,128		$	7,212		$	18,380		$	1,182		$	—	$	115,902
Loan individually evaluated for impairment	$	26,673		$	—		$	4,126		$	491		$	—	$	31,290
Loans collectively evaluated for impairment	62,455			7,212			14,254			691			—		84,612
Ending balance	$	89,128		$	7,212		$	18,380		$	1,182		$	—	$	115,902
Total loans:
Individually evaluated for impairment	$	198,033		$	—		$	13,559		$	1,514		$	—	$	213,106
Collectively evaluated for impairment	2,516,946			606,073			694,838			127,085			568		3,945,510
Total loans	$	2,714,979		$	606,073		$	708,397		$	128,599		$	568	$	4,158,616

Three months ended March 31, 2011	Real Estate			Consumer			Commercial			Agriculture			Other		Total
Allowance for loan losses:
Beginning balance	$	84,181		$	9,332		$	25,354		$	1,613		$	—	$	120,480
Provision charged to operating expense	12,155			688			2,457			(300		)	—		15,000
Less loans charged-off	(4,231		)	(1,460		)	(6,642		)	(6		)	—		(12,339		)
Add back recoveries of loans previously charged-off	245			432			621			7			—		1,305
Ending balance	$	92,350		$	8,992		$	21,790		$	1,314		$	—	$	124,446
Loans individually evaluated for impairment	$	31,778		$	—		$	11,029		$	272		$	—	$	43,079
Loans collectively evaluated for impairment	60,571			8,992			10,739			1,043			22		81,367
Ending balance	$	92,349		$	8,992		$	21,768		$	1,315		$	22	$	124,446
Total loans:
Individually evaluated for impairment	$	194,709		$	—		$	27,160		$	1,072		$	—	$	222,941
Collectively evaluated for impairment	2,616,734			625,083			676,677			120,499			1,830		4,040,823
Total loans	$	2,811,443		$	625,083		$	703,837		$	121,571		$	1,830	$	4,263,764

The Company performs a quarterly assessment of the adequacy of its allowance for loan losses in accordance with generally accepted accounting principles. The methodology used to assess the adequacy is consistently applied to the Company's loan portfolio and consists of three elements: (1) specific valuation allowances based on probable losses on impaired loans; (2) historical valuation allowances based on loan loss experience for similar loans with similar characteristics and trends; and (3) general valuation allowances determined based on changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends, general economic conditions and other qualitative risk factors both internal and external to the Company.

Specific allowances are established for loans where management has determined that probability of a loss exists by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies and any relevant qualitative or environmental factors impacting the loan. Historical valuation allowances are determined by applying percentage loss factors to the credit exposures from outstanding loans. For commercial, agricultural and real estate loans, loss factors are applied based on the internal risk classifications of these loans. For consumer loans, loss factors are applied on a portfolio basis. For commercial, agriculture and real estate loans, loss factor percentages are based on a migration analysis of our historical loss experience, designed to account for credit deterioration. For consumer loans, loss factor percentages are based on a one-year loss history. General valuation allowances are determined by evaluating, on a quarterly basis, changes in the nature and volume of the loan portfolio, overall portfolio quality, industry concentrations, current economic and regulatory factors and the estimated impact of current economic, environmental and regulatory conditions on historical loss rates.

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Loans

3 Months Ended

Mar. 31, 2012

Receivables [Abstract]

Loans

Loans

The following table presents loans by class as of the dates indicated:

	March 31, 2012		December 31, 2011
Real estate loans:
Commercial	$	1,533,624	$	1,553,155
Construction:
Land acquisition & development	272,874		278,613
Residential	50,332		61,106
Commercial	65,196		61,054
Total construction loans	388,402		400,773
Residential	562,588		571,943
Agricultural	171,685		175,302
Total real estate loans	2,656,299		2,701,173
Consumer:
Indirect consumer	407,389		407,651
Other consumer	142,144		147,487
Credit card	56,540		60,933
Total consumer loans	606,073		616,071
Commercial	708,397		693,261
Agricultural	128,599		119,710
Other, including overdrafts	568		2,813
Loans held for investment	4,099,936		4,133,028
Mortgage loans held for sale	58,680		53,521
Total loans	$	4,158,616	$	4,186,549

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following tables present the contractual aging of the Company’s recorded investment in past due loans by class as of the period indicated:

							Total Loans
	30 - 59		60 - 89		> 90		30 or More
	Days		Days		Days		Days		Current		Non-accrual		Total
As of March 31, 2012	Past Due		Past Due		Past Due		Past Due		Loans		Loans		Loans
Real estate
Commercial	$	18,492	$	2,956	$	1,044	$	22,492	$	1,450,034	$	61,098	$	1,533,624
Construction:
Land acquisition & development	3,445		290		402		4,137		210,261		58,476		272,874
Residential	—		1,185		137		1,322		45,047		3,963		50,332
Commercial	1,556		150		—		1,706		41,198		22,292		65,196
Total construction loans	5,001		1,625		539		7,165		296,506		84,731		388,402
Residential	2,995		1,079		1,919		5,993		541,219		15,376		562,588
Agricultural	6,007		435		—		6,442		160,573		4,670		171,685
Total real estate loans	32,495		6,095		3,502		42,092		2,448,332		165,875		2,656,299
Consumer:
Indirect consumer	2,024		128		—		2,152		404,831		406		407,389
Other consumer	722		157		128		1,007		140,243		894		142,144
Credit card	507		194		660		1,361		55,154		25		56,540
Total consumer loans	3,253		479		788		4,520		600,228		1,325		606,073
Commercial	13,709		1,460		629		15,798		680,391		12,208		708,397
Agricultural	1,026		13		366		1,405		125,692		1,502		128,599
Other, including overdrafts	—		—		—		—		568		—		568
Loans held for investment	50,483		8,047		5,285		63,815		3,855,211		180,910		4,099,936
Mortgage loans originated for sale	—		—		—		—		58,680		—		58,680
Total loans	$	50,483	$	8,047	$	5,285	$	63,815	$	3,913,891	$	180,910	$	4,158,616

							Total Loans
	30 - 59		60 - 89		> 90		30 or More
	Days		Days		Days		Days		Current		Non-accrual		Total
As of December 31, 2011	Past Due		Past Due		Past Due		Past Due		Loans		Loans		Loans
Real estate
Commercial	$	22,124	$	7,871	$	630	$	30,625	$	1,455,139	$	67,391	$	1,553,155
Construction:
Land acquisition & development	5,251		2,448		867		8,566		208,134		61,913		278,613
Residential	415		—		—		415		56,219		4,472		61,106
Commercial	1,698		—		—		1,698		34,820		24,536		61,054
Total construction loans	7,364		2,448		867		10,679		299,173		90,921		400,773
Residential	4,669		973		1,798		7,440		546,278		18,225		571,943
Agricultural	4,103		1,831		—		5,934		166,119		3,249		175,302
Total real estate loans	38,260		13,123		3,295		54,678		2,466,709		179,786		2,701,173
Consumer:
Indirect consumer	3,078		370		45		3,493		403,695		463		407,651
Other consumer	1,479		436		60		1,975		144,625		887		147,487
Credit card	604		375		585		1,564		59,343		26		60,933
Total consumer loans	5,161		1,181		690		7,032		607,663		1,376		616,071
Commercial	13,721		3,464		405		17,590		657,609		18,062		693,261
Agricultural	476		215		110		801		118,150		759		119,710
Other, including overdrafts	—		2		—		2		2,811		—		2,813
Loans held for investment	57,618		17,985		4,500		80,103		3,852,942		199,983		4,133,028
Mortgage loans originated for sale	—		—		—		—		53,521		—		53,521
Total loans	$	57,618	$	17,985	$	4,500	$	80,103	$	3,906,463	$	199,983	$	4,186,549

If interest on non-accrual loans had been accrued, such income would have approximated $2,702 and $2,838 for the three months ended March 31, 2012 and 2011, respectively.

The Company considers impaired loans to include all loans risk rated doubtful, loans placed on non-accrual status and loans renegotiated in troubled debt restructurings with the exception of consumer loans. The following tables present information on the Company’s recorded investment in impaired loans as of dates indicated:

	As of March 31, 2012
	Unpaid Total Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance
Real estate:
Commercial	$	99,746	$	64,702	$	23,742	$	88,444	$	7,083
Construction:
Land acquisition & development	72,504		23,982		36,379		60,361		12,632
Residential	5,212		2,203		1,760		3,963		276
Commercial	24,403		11,218		11,074		22,292		3,978
Total construction loans	102,119		37,403		49,213		86,616		16,886
Residential	17,272		8,318		7,627		15,945		2,451
Agricultural	7,526		7,028		—		7,028		—
Total real estate loans	226,663		117,451		80,582		198,033		26,420
Commercial	20,200		5,737		7,822		13,559		4,122
Agricultural	1,566		1,028		486		1,514		491
Total	$	248,429	$	124,216	$	88,890	$	213,106	$	31,033

	As of December 31, 2011
	Unpaid Total Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance
Real estate:
Commercial	$	97,745	$	62,769	$	23,218	$	85,987	$	6,741
Construction:
Land acquisition & development	73,258		22,300		39,131		61,431		12,084
Residential	13,721		10,427		2,044		12,471		312
Commercial	26,647		3,510		21,026		24,536		5,042
Total construction loans	113,626		36,237		62,201		98,438		17,438
Residential	18,305		2,678		15,626		18,304		3,844
Agricultural	8,018		7,470		—		7,470		—
Total real estate loans	237,694		109,154		101,045		210,199		28,023
Commercial	26,348		7,354		12,284		19,638		4,664
Agricultural	759		496		263		759		151
Total	$	264,801	$	117,004	$	113,592	$	230,596	$	32,838

The following table presents the average recorded investment in and income recognized on impaired loans for the periods indicated:

	Three months ended March 31, 2012				Three months ended March 31, 2011
	Average				Average
	Recorded		Income		Recorded	Income
	Investment		Recognized		Investment	Recognized
Real estate:
Commercial	$	88,657	$	351	74,768	$	92
Construction:
Land acquisition & development	62,227		16		45,552	45
Residential	9,208		—		18,121	19
Commercial	24,265		—		19,321	—
Total construction loans	95,700		16		82,994	64
Residential	18,072		9		21,070	—
Agricultural	7,268		32		3,677	2
Total real estate loans	209,697		408		182,509	158
Commercial	17,885		22		34,397	42
Agricultural	1,234		4		920	—
Total	$	228,816	$	434	217,826	$	200

The amount of interest income recognized by the Company within the period that the loans were impaired was primarily related to loans modified in a troubled debt restructuring that remained on accrual status. Interest payments received on non-accrual impaired loans are applied to principle. Interest income is subsequently recognized only to the extent cash payments are received in excess of principle due. If interest on impaired loans had been accrued, interest income on impaired loans would have been approximately $2,683 and $2,810 for the three months ended March 31, 2012 and 2011, respectively.

Collateralized impaired loans are generally recorded at the fair value of the underlying collateral using discounted cash flows, independent appraisals and management estimates based upon current market conditions. For loans measured under the present value of cash flows method, the change in present value attributable to the passage of time, if applicable, is recognized in the provision for loan losses and thus no interest income is recognized.

Modifications of performing loans are made in the ordinary course of business and are completed on a case-by-case basis as negotiated with the borrower. Loan modifications typically include interest rate concessions, interest only periods of less than twelve months, short-term payment deferrals and extension of amortization periods to provide payment relief. A loan modification is considered a troubled debt restructuring if the borrower is experiencing financial difficulties and the Company, for economic or legal reasons, grants a concession to the borrower that it would not otherwise consider. Certain troubled debt restructurings are on non-accrual status at the time of restructuring and are typically returned to accrual status after considering the borrower's sustained repayment performance in accordance with the restructuring agreement for a period of at least six months and management is reasonably assured of future performance. If the troubled debt restructuring meets these performance criteria and the interest rate granted at the modification is equal to or greater than the rate that the Company was willing to accept at the time of the restructuring for a new loan with comparable risk, then the loan will return to performing status and the accrual of interest will resume.

The Company had loans renegotiated in troubled debt restructurings of $88,949 as of March 31, 2012, of which $52,111 were included in non-accrual loans and $36,838 were on accrual status. The Company had loans renegotiated in troubled debt restructurings of $94,827 as of December 31, 2011, of which $57,451 were included in non-accrual loans and $37,376 were on accrual status.

The following table presents information on the Company's troubled debt restructurings that occurred during the three months ended March 31, 2012:

	Number of Notes	Type of Concession								Principle Balance at Restructure Date
		Interest only period		Extension of terms or maturity		Interest rate adjustment		Other (1)
Real estate:
Commercial	9	$	—	$	—	$	1,089	$	8,463	$	9,552
Construction:
Land acquisition & development	2	—		—		—		623		623
Commercial	1	—		—		—		3,155		3,155
Total construction loans	3	—		—		—		3,778		3,778
Residential	2	568		25		—		—		593
Total real estate loans	14	568		25		1,089		12,241		13,923
Commercial	5	13		98		—		80		191
Total	19	$	581	$	123	$	1,089	$	12,321	$	14,114

(1) Other includes concessions that reduce or defer payments for a specified period of time and/or extend amortization schedules.

For troubled debt restructurings that were on non-accrual status or otherwise deemed impaired before the modification, a specific reserve may already be recorded. In periods subsequent to modification, the Company continues to evaluate all troubled debt restructurings for possible impairment and recognizes impairment through the allowance. Additionally these loans continue to work their way through the credit cycle through charge-off, pay-off or foreclosure. Financial effects of modifications of troubled debt restructurings may include principle loan forgiveness or other charge-offs directly related to the restructuring. The Company had no charge-offs directly related to modifying troubled debt restructurings during the three months ended March 31, 2012.

The following table presents information on the Company's troubled debt restructurings during the previous 12 months for which there was a payment default during the three month period ended March 31, 2012. The Company considers a payment default to occur on troubled debt restructurings when the loan is 90 days or more past due or was placed on non-accrual status after the modification. Four of the five troubled debt restructurings with payment defaults in the following table are on non-accrual status.

	As of March 31, 2012
	Number of Notes	Balance
Real estate:
Land acquisition & development	1	505
Total construction loans	1	505
Agriculture	2	1,624
Total real estate loans	3	2,129
Agricultural	2	328
Total	5	$	2,457

At March 31, 2012, there were no material commitments to lend additional funds to borrowers whose existing loans have been renegotiated or are classified as non-accrual.

As part of the on-going and continuous monitoring of the credit quality of the Company’s loan portfolio, management tracks internally assigned risk classifications of loans. The Company adheres to a Uniform Classification System developed jointly by the various bank regulatory agencies to internally risk rate loans. The Uniform Classification System defines three broad categories of criticized assets, which the Company uses as credit quality indicators:

Other Assets Especially Mentioned — includes loans that exhibit weaknesses in financial condition, loan structure or documentation, which if not promptly corrected, may lead to the development of abnormal risk elements.

Substandard — includes loans that are inadequately protected by the current sound worth and paying capacity of the borrower. Although the primary source of repayment for a Substandard is not currently sufficient; collateral or other sources of repayment are sufficient to satisfy the debt. Continuance of a Substandard loan is not warranted unless positive steps are taken to improve the worthiness of the credit.

Doubtful — includes loans that exhibit pronounced weaknesses to a point where collection or liquidation in full, on the basis of currently existing facts, conditions and values, is highly questionable and improbable. Doubtful loans are required to be placed on non-accrual status and are assigned specific loss exposure.

The following tables present the Company’s recorded investment in criticized loans by class and credit quality indicator based on the most recent analysis performed as of the dates indicated:

	Other Assets Especially Mentioned		Substandard		Doubtful		Total Criticized Loans
As of March 31, 2012
Real estate:
Commercial	$	117,979	$	149,852	$	25,252	$	293,083
Construction:
Land acquisition & development	34,909		34,806		35,878		105,593
Residential	1,536		5,428		1,760		8,724
Commercial	55		11,061		11,234		22,350
Total construction loans	36,500		51,295		48,872		136,667
Residential	8,963		18,587		7,141		34,691
Agricultural	22,993		16,128		395		39,516
Total real estate loans	186,435		235,862		81,660		503,957
Consumer:
Indirect consumer	1,033		1,755		202		2,990
Other consumer	825		1,461		585		2,871
Credit card	—		558		2,757		3,315
Total consumer loans	1,858		3,774		3,544		9,176
Commercial	45,730		33,714		7,906		87,350
Agricultural	8,048		2,815		486		11,349
Total	$	242,071	$	276,165	$	93,596	$	611,832

	Other Assets Especially Mentioned		Substandard		Doubtful		Total Criticized Loans
As of December 31, 2011
Real estate:
Commercial	$	129,046	$	153,320	$	25,087	$	307,453
Construction:
Land acquisition & development	37,294		31,873		38,761		107,928
Residential	9,448		5,528		2,044		17,020
Commercial	—		2,620		21,916		24,536
Total construction loans	46,742		40,021		62,721		149,484
Residential	8,149		15,706		15,140		38,995
Agricultural	16,037		18,498		395		34,930
Total real estate loans	199,974		227,545		103,343		530,862
Consumer:
Indirect consumer	1,141		1,729		247		3,117
Other consumer	745		1,361		674		2,780
Credit card	—		486		2,789		3,275
Total consumer loans	1,886		3,576		3,710		9,172
Commercial	34,698		33,478		12,849		81,025
Agricultural	4,345		5,195		263		9,803
Total	$	240,903	$	269,794	$	120,165	$	630,862

The Company maintains a credit review function, which is independent of the credit approval process, to assess assigned internal risk classifications and monitor compliance with internal lending policies and procedures. Written action plans with firm target dates for resolution of identified problems are maintained and reviewed on a quarterly basis for all categories of criticized loans.

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Other Comprehensive Income

3 Months Ended

Mar. 31, 2012

Equity [Abstract]

Other Comprehensive Income

Other Comprehensive Income

The gross amounts of each component of other comprehensive income and the related tax effects are as follows:

	Before Tax Amount			Tax Expense (Benefit)			Net of Tax Amount
Three months ended March 31, 2012:
Investment securities available-for sale:
Change in net unrealized gain during period	$	755		$	296		$	459
Reclassification adjustment for net gains included in net income	(31		)	(12		)	(19		)
Defined benefits post-retirement benefit plan:
Change in net actuarial loss	33			13			20
Total other comprehensive income	$	757		$	297		$	460
Three months ended March 31, 2011:
Investment securities available-for sale:
Change in net unrealized gain during period	$	417		$	163		$	254
Reclassification adjustment for net gains included in net income	(2		)	—			(2		)
Defined benefits post-retirement benefit plan:
Change in net actuarial loss	35			14			21
Total other comprehensive income	$	450		$	177		$	273

The components of accumulated other comprehensive income, net of income taxes, are as follows:

	March 31, 2012			December 31, 2011
Net unrealized gain on investment securities available-for-sale	$	20,973		$	20,533
Net actuarial loss on defined benefit post-retirement benefit plans	(1,479		)	(1,499		)
Net accumulated other comprehensive income	$	19,494		$	19,034

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Regulatory Capital

3 Months Ended

Mar. 31, 2012

Banking and Thrift [Abstract]

Regulatory Capital

Regulatory Capital

The Company is subject to the regulatory capital requirements administered by federal banking regulators and the Federal Reserve. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios of total and tier 1 capital to risk-weighted assets, and of tier 1 capital to average assets, as defined in the regulations. As of March 31, 2012 and December 31, 2011, the Company exceeded all capital adequacy requirements to which it is subject.

Actual capital amounts and ratios and selected minimum regulatory thresholds for the Company and its bank subsidiary, First Interstate Bank (“FIB”), as of March 31, 2012 and December 31, 2011 are presented in the following table:

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
March 31, 2012
Total risk-based capital:
Consolidated	$	809,702	16.9	%	$	383,451	8.0	%	NA		NA
FIB	670,468		14.1		381,301		8.0		$	476,626	10.0	%
Tier 1 risk-based capital:
Consolidated	714,097		14.9		191,726		4.0		NA		NA
FIB	595,194		12.5		190,651		4.0		$	285,976	6.0
Leverage capital ratio:
Consolidated	714,097		10.0		285,341		4.0		NA		NA
FIB	595,194		8.4		284,374		4.0		$	355,467	5.0

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2011
Total risk-based capital:
Consolidated	$	800,354	16.5	%	$	387,082	8.0	%	NA		NA
FIB	663,860		13.8		384,987		8.0		$	481,234	10.0	%
Tier 1 risk-based capital:
Consolidated	704,229		14.6		193,541		4.0		NA		NA
FIB	588,059		12.2		192,494		4.0		$	288,740	6.0
Leverage capital ratio:
Consolidated	704,229		9.8		286,303		4.0		NA		NA
FIB	588,059		8.2		285,358		4.0		$	356,698	5.0

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Common Stock

3 Months Ended

Mar. 31, 2012

Equity [Abstract]

Common Stock

Common Stock

The Company had 16,758,066 and 16,443,429 shares of Class A common stock outstanding as of March 31, 2012 and December 31, 2011, respectively.

The Company had 26,432,909 and 26,540,745 shares of Class B common stock outstanding as of March 31, 2012 and December 31, 2011, respectively.

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Earnings per Common Share

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings per Common Share

Earnings per Common Share

Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period presented, excluding unvested restricted stock. Diluted earnings per share is calculated by dividing net income by the weighted average number of common shares determined for the basic earnings per share computation plus the dilutive effects of stock-based compensation using the treasury stock method.

The following table sets forth the computation of basic and diluted earnings per share for the three month periods ended March 31, 2012 and 2011.

Three months ended March 31,	2012		2011
Net income	$	12,214	$	9,506
Less preferred stock dividends	853		844
Net income available to common shareholders, basic and diluted	$	11,361	$	8,662
Weighted average common shares outstanding for basic earnings per share computation	42,873,769		42,689,390
Dilutive effects of stock-based compensation	108,774		170,591
Weighted average common shares outstanding for diluted earnings per common share computation	42,982,543		42,859,981
Basic earnings per common share	$	0.26	$	0.20
Diluted earnings per common share	$	0.26	$	0.20

The Company had 2,657,668 and 2,265,709 stock options outstanding as of March 31, 2012 and 2011, respectively, that were not included in the computation of diluted earnings per common share because their effect would be anti-dilutive. The Company had 48,196 and 41,704 shares of unvested restricted stock as of March 31, 2012 and 2011, respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

(8) Commitments and Contingencies

In the normal course of business, the Company is involved in various claims and litigation. In the opinion of management, following consultation with legal counsel, the ultimate liability or disposition thereof is not expected to have a material adverse effect on the consolidated financial condition, results of operations or liquidity of the Company.

The Company had commitments under construction contracts of $3,254 as of March 31, 2012.

The Company had commitments to purchase available-for-sale U.S. government agency securities of $10,000 and held-to-maturity municipal investment securities of $2,020 as of March 31, 2012.

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Recent Authoritative Accounting Guidance

3 Months Ended

Mar. 31, 2012

Accounting Changes and Error Corrections [Abstract]

Recent Authoritative Accounting Guidance

Recent Authoritative Accounting Guidance

ASU No. 2011-03, "Transfers and Servicing (Topic 860) - Reconsideration of Effective Control for Repurchase Agreements." Accounting Standards Update (“ASU”) No. 2011-03 is intended to improve financial reporting for repurchase agreements and other agreements that both entitle and obligate a transferor to repurchase or redeem financial assets before their maturity. ASU No. 2011-03 removes from the assessment of effective control (1) the criterion requiring the transferor to have the ability to repurchase or redeem the financial assets on substantially the agreed terms, even in the event of default by the transferee, and (2) the collateral maintenance implementation guidance related to that criterion. The provisions of ASU No. 2011-03 became effective for the Company on January 1, 2012 and did not impact the Company's consolidated financial statements, results of operations or liquidity.

ASU No. 2011-04, "Fair Value Measurements (Topic 820) - Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRSs." ASU No. 2011-04 amends Topic 820, "Fair Value Measurements and disclosures," to converge the fair value measurements guidance in U.S. generally accepted accounting principles and International Financial Reporting Standards. ASU 2011-04 clarifies the application of existing fair value measurement requirements, changes certain principles in Topic 820 and requires additional fair value disclosures. ASU No. 2011-04 became effective for the Company on January 1, 2012 and did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-05, “Comprehensive Income (Topic 220) - Presentation of Comprehensive Income.” ASU 2011-05 amends Topic 220, “Comprehensive Income,” to require that all non-owner changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. Additionally, ASU 2011-05 requires entities to present, on the face of the financial statements, reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement or statements where the components of net income and the components of other comprehensive income are presented. The option to present components of other comprehensive income as part of the statement of changes in stockholders’ equity was eliminated. ASU 2011-05 became effective for the Company on January 1, 2012; however, certain provisions related to the presentation of reclassification adjustments have been deferred by ASU 2011-12 “Comprehensive Income (Topic 220) - Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05,” as further discussed below. Adoption of the provisions of ASU 2011-05 did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-08, “Intangibles - Goodwill and Other (Topic 350) - Testing Goodwill for Impairment.” ASU 2011-08 amends Topic 350, “Intangibles - Goodwill and Other,” to give entities the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. ASU 2011-08 is effective for annual and interim impairment tests beginning after December 15, 2011, and will not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-11, “Balance Sheet (Topic 210) - “Disclosures about Offsetting Assets and Liabilities.” ASU 2011-11 amends Topic 210, “Balance Sheet,” to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sale and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. ASU 2011-11 is effective for annual and interim periods beginning on January 1, 2013, and is not expected to have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

ASU 2011-12 “Comprehensive Income (Topic 220) - Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05.” ASU 2011-12 defers changes in ASU No. 2011-05 that relate to the presentation of reclassification adjustments to allow the FASB time to redeliberate whether to require presentation of such adjustments on the face of the financial statements to show the effects of reclassifications out of accumulated other comprehensive income on the components of net income and other comprehensive income. ASU 2011-12 allows entities to continue to report reclassifications out of accumulated other comprehensive income consistent with the presentation requirements in effect before ASU No. 2011-05. ASU 2011-12 became effective for the Company on January 1, 2012 and did not have a significant impact on the Company's consolidated financial statements, results of operations or liquidity.

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 12,214	$ 9,506
Other comprehensive income, before tax:
Change in net unrealized gain during period	755	417
Reclassification adjustment for gains included in income	(31)	(2)
Defined benefit post-retirement benefits plans:
Change in net actuarial loss	33	35
Other comprehensive income, before tax	757	450
Deferred tax expense related to other comprehensive income	297	177
Other comprehensive income, net of tax	460	273
Comprehensive income, net of tax	$ 12,674	$ 9,779

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Investment Securities

3 Months Ended

Mar. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

The amortized cost and approximate fair values of investment securities are summarized as follows:

March 31, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale
Obligations of U.S. government agencies	$	1,085,140	$	3,993	$	(687	)	$	1,088,446
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	835,494		30,820		(34		)	866,280
Private mortgage-backed securities	704		11		(5		)	710
Total	$	1,921,338	$	34,824	$	(726	)	$	1,955,436

March 31, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Held-to Maturity
State, county and municipal securities	$	157,921	$	9,020	$	(158	)	$	166,783
Other securities	149		—		—			149
Total	$	158,070	$	9,020	$	(158	)	$	166,932

December 31, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale
Obligations of U.S. government agencies	$	1,134,427	$	4,353	$	(662	)	$	1,138,118
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	848,444		29,567		(14		)	877,997
Private mortgage-backed securities	758		7		(16		)	749
Total	$	1,983,629	$	33,927	$	(692	)	$	2,016,864

December 31, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Held-to Maturity
State, county and municipal securities	$	152,619	$	9,113	$	(17	)	$	161,715
Other securities	162		—		—			162
Total	$	152,781	$	9,113	$	(17	)	$	161,877

Gross gains of $31 and $2 were realized on the disposition of available-for-sale securities during the three months ended March 31, 2012 and 2011, respectively. No gross losses were realized on the disposition of available-for-sale investment securities during the three months ended March 31, 2012 or 2011.

The following table shows the gross unrealized losses and fair values of investment securities, aggregated by investment category, and the length of time individual investment securities have been in a continuous unrealized loss position, as of March 31, 2012 and December 31, 2011.

	Less than 12 Months					12 Months or More					Total
March 31, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Available-for-Sale
Obligations of U.S. government agencies	$	177,078	$	(687	)	$	—	$	—		$	177,078	$	(687	)
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	3,617		(34		)	—		—			3,617		(34		)
Private mortgage-backed securities	—		—			167		(5		)	167		(5		)
Total	$	180,695	$	(721	)	$	167	$	(5	)	$	180,862	$	(726	)

	Less than 12 Months					12 Months or More					Total
March 31, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Held-to-Maturity
State, county and municipal securities	$	5,501	$	(134	)	$	733	$	(24	)	$	6,234	$	(158	)

	Less than 12 Months					12 Months or More					Total
December 31, 2011	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Available-for-Sale
Obligations of U.S. government agencies	$	287,404	$	(662	)	$	—	$	—		$	287,404	$	(662	)
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations	45,694		(14		)	—		—			45,694		(14		)
Private mortgage-backed securities	246		(10		)	177		(6		)	423		(16		)
Total	$	333,344	$	(686	)	$	177	$	(6	)	$	333,521	$	(692	)

	Less than 12 Months				12 Months or More					Total
December 31, 2011	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Held-to-Maturity
State, county and municipal securities	$	—	$	—	$	773	$	(17	)	$	773	$	(17	)

The investment portfolio is evaluated quarterly for other-than-temporary declines in the market value of each individual investment security. The Company had 27 and 24 individual investment securities that were in an unrealized loss position as of March 31, 2012 and December 31, 2011, respectively. Unrealized losses as of March 31, 2012 and December 31, 2011 related primarily to fluctuations in the current interest rates. The Company does not have the intent to sell any of the available-for-sale securities in the above table and it is more likely than not that the Company will not have to sell any such securities before a recovery in cost. No impairment losses were recorded during the three months ended March 31, 2012 or 2011.

Maturities of investment securities at March 31, 2012 are shown below. Maturities of mortgage-backed securities have been adjusted to reflect shorter maturities based upon estimated prepayments of principal. All other investment securities maturities are shown at contractual maturity dates.

	Available-for-Sale				Held-to-Maturity
March 31, 2012	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Within one year	$	385,624	$	395,736	$	7,023	$	6,799
After one year but within five years	1,312,315		1,328,373		22,288		23,096
After five years but within ten years	146,006		151,084		66,498		70,529
After ten years	77,393		80,243		62,112		66,359
Total	1,921,338		1,955,436		157,921		166,783
Investments with no stated maturity	—		—		149		149
Total	$	1,921,338	$	1,955,436	$	158,070	$	166,932

As of March 31, 2012, the Company had investment securities callable within one year with amortized costs and estimated fair values of $634,320 and $635,629, respectively, including callable structured notes with amortized costs and estimated fair values of $195,257 and $195,899, respectively. These investment securities are primarily classified as available-for-sale and included in the after one year but within five years category in the table above.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Financial assets and financial liabilities measured at fair value on a recurring basis are as follows:

			Fair Value Measurements at Reporting Date Using
	Balance as of 3/31/2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	1,088,446	$	—	$	1,088,446	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	866,280		—		866,280		—
Private mortgage-backed securities	710		—		710		—
Mortgage servicing rights	13,625		—		13,625		—

			Fair Value Measurements at Reporting Date Using
	Balance as of 12/31/2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	1,138,118	$	—	$	1,138,118	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	877,997		—		877,997		—
Private mortgage-backed securities	749		—		749		—
Mortgage servicing rights	11,910		—		11,910		—
Derivative liability contract	383		—		—		383

The following table reconciles the beginning and ending balances of the derivative liability contract measured at fair value on a recurring basis using significant unobservable (Level 3) inputs during the three months ended March 31, 2012 and 2011:

For the Three Months Ended March 31,	2012			2011
Balance, beginning of period	$	383		$	86
Accruals during the period	—			—
Cash payments during the period	(383		)	—
Balance, end of period	$	—		$	86

There were no transfers between levels of the fair value hierarchy during the three months ended March 31, 2012 or 2011.

The methodologies used by the Company in determining the fair values of each class of financial instruments are based primarily on the use of independent, market-based data to reflect a value that would be reasonably expected in an orderly transaction between market participants at the measurement date. The Company obtains fair value measurements for investment securities from an independent pricing service and evaluates mortgage servicing rights for impairment using an independent valuation service. The vendors chosen by the Company are widely recognized vendors whose evaluations support the pricing functions of financial institutions, investment and mutual funds, and portfolio managers. The Company has documented and evaluated the pricing methodologies used by the vendors and maintains internal processes that regularly test valuations. These internal processes include obtaining and reviewing available reports on internal controls, evaluating the prices for reasonableness given market changes, obtaining and evaluating the inputs used in the model for a sample of securities, investigating anomalies and confirming determinations through discussions with the vendor. For investment securities, if needed, a broker may be utilized to determine the reported fair value. Further details on the methods used to estimate the fair value of each class of financial instruments above are discussed below:

Investment Securities Available-for-Sale. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the investment's terms and conditions, among other things.

Mortgage Servicing Rights. Mortgage servicing rights are initially recorded at fair value based on comparable market quotes and are amortized in proportion to and over the period of estimated net servicing income. Mortgage servicing rights are evaluated quarterly for impairment using an independent valuation service. The valuation service utilizes discounted cash flow modeling techniques, which consider observable data that includes market consensus prepayment speeds and the predominant risk characteristics of the underlying loans including loan type, note rate and loan term. Management believes the significant inputs utilized in the valuation model are observable in the market.

Derivative Liability Contract. In conjunction with the sale of all of its Class B shares of Visa, Inc. (“Visa”) common stock in 2009, the Company entered into a derivative liability contract with the purchaser whereby the Company will make or receive cash payments based on subsequent changes in the conversion rate of the Class B shares into Class A shares of Visa. The conversion rate is dependent upon the resolution of certain litigation involving Visa U.S.A. Inc. card association or its affiliates. The fair value of the derivative liability contract is estimated utilizing an internal valuation model with significant unobservable inputs including the Company's expectations regarding the ultimate resolution of the Visa litigation and loss severity in the event of unfavorable litigation outcomes. The probability of unfavorable litigation outcomes and the estimation of loss severity is determined through review of Visa's press releases and public filings made with the Securities and Exchange Commission and managements' estimation of the effect of changes in litigation status on the value of the derivative liability contract.

Additionally, from time to time, certain assets are measured at fair value on a non-recurring basis. Adjustments to fair value generally result from the application of lower-of-cost-or-market accounting or write-downs of individual assets due to impairment. The following table presents information about the Company’s assets and liabilities measured at fair value on a non-recurring basis.

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
As of March 31, 2012
Impaired loans	$	76,188	$	—	$	—	$	76,188
Other real estate owned	16,720		—		—		16,720
As of December 31, 2011
Impaired loans	$	100,035	$	—	$	—	$	100,035
Other real estate owned	17,000		—		—		17,000

Impaired Loans. Collateralized impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from collateral. The impaired loans are reported at fair value through specific valuation allowance allocations. In addition, when it is determined that the fair value of an impaired loan is less than the recorded investment in the loan, the carrying value of the loan is adjusted to fair value through a charge to the allowance for loan losses. Collateral values are estimated using independent appraisals and management estimates of current market conditions. As of March 31, 2012, certain impaired loans with a carrying value of $142,545 were reduced by specific valuation allowance allocations of $31,033 and partial loan charge-offs of $35,324 resulting in a reported fair value of $76,188. As of December 31, 2011, certain impaired loans with a carrying value of $167,078 were reduced by specific valuation allowance allocations of $32,838 and partial loan charge-offs of $34,205 resulting in a reported fair value of $100,035.

OREO.The fair values of OREO are estimated using independent appraisals and management estimates of current market conditions. Upon initial recognition, write-downs based on the foreclosed asset's fair value at foreclosure are reported through charges to the allowance for loan losses. Periodically, the fair value of foreclosed assets is remeasured with any subsequent write-downs charged to OREO expense in the period in which they are identified. Write-downs of $578 during the three months ended March 31, 2012 included adjustments of $511 directly related to receipt of updated appraisals and adjustments of $67 based on management estimates of the current fair value of properties. Write-downs of $1,552 during the three months ended March 31, 2011 included adjustments of $10 directly related to receipt of updated appraisals and adjustments of $1,542 based on management estimates of the current fair value of properties.

Long-lived Assets to be Disposed of by Sale. Long-lived assets to be disposed of by sale are carried at the lower of carrying value or fair value less estimated costs to sell. The fair values of long-lived assets to be disposed of by sale are based upon observable market data and management estimates of current market conditions. As of March 31, 2012 and December 31, 2011, the Company had a long-lived asset to be disposed of by sale of $1,513 that was carried at cost.

In addition, mortgage loans held for sale are required to be measured at the lower of cost or fair value. The fair value of mortgage loans held for sale is based upon binding contracts or quotes or bids from third party investors. As of March 31, 2012 and December 31, 2011, all mortgage loans held for sale were recorded at cost.

The Company is required to disclose the fair value of financial instruments for which it is practical to estimate fair value. The methodologies for estimating the fair value of financial instruments that are measured at fair value on a recurring or non-recurring basis are discussed above. The methodologies for estimating the fair value of other financial instruments are discussed below. For financial instruments bearing a variable interest rate where no credit risk exists, it is presumed that recorded book values are reasonable estimates of fair value.

Financial Assets. Carrying values of cash, cash equivalents and accrued interest receivable approximate fair values due to the liquid and/or short-term nature of these instruments. Fair values for investment securities held-to-maturity are obtained from an independent pricing service, which considers observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the investment’s terms and conditions, among other things. Fair values of fixed rate loans and variable rate loans that reprice on an infrequent basis are estimated by discounting future cash flows using current interest rates at which similar loans with similar terms would be made to borrowers of similar credit quality. Carrying values of variable rate loans that reprice frequently, and with no change in credit risk, approximate the fair values of these instruments.

Financial Liabilities. The fair values of demand deposits, savings accounts, securities sold under repurchase agreements and accrued interest payable are the amount payable on demand at the reporting date. The fair values of fixed-maturity certificates of deposit are estimated using external market rates currently offered for deposits with similar remaining maturities. The carrying values of the interest bearing demand notes to the United States Treasury are deemed an approximation of fair values due to the frequent repayment and repricing at market rates. The fair value of the derivative contract was estimated by discounting cash flows using assumptions regarding the expected outcome of related litigation. The floating rate term notes, floating rate subordinated debentures, floating rate subordinated term loan and unsecured demand notes bear interest at floating market rates and, as such, carrying amounts are deemed to approximate fair values. The fair values of notes payable to the FHLB, fixed rate subordinated term debt, fixed rate subordinated debentures and capital lease obligation are estimated by discounting future cash flows using current rates for advances with similar characteristics.

Commitments to Extend Credit and Standby Letters of Credit. The fair value of commitments to extend credit and standby letters of credit, based on fees currently charged to enter into similar agreements, is not significant.

The estimated fair values of financial instruments that are reported at amortized cost in the Company's consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

	March 31, 2012				December 31, 2011
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial assets:
Level 2 inputs:
Cash and cash equivalents	$	622,924	$	622,924	$	472,447	$	472,447
Investment securities available-for-sale	1,955,436		1,955,436		2,016,864		2,016,864
Investment securities held-to-maturity	158,070		166,932		152,781		161,877
Accrued interest receivable	30,407		30,407		31,974		31,974
Mortgage servicing rights, net	11,833		13,625		11,555		11,910
Net loans	4,042,714		4,022,554		4,073,968		4,064,718
Total financial assets	$	6,821,384	$	6,811,878	$	6,759,589	$	6,759,790
Financial liabilities:
Level 2 inputs:
Total deposits, excluding time deposits	$	4,383,432	$	4,383,432	$	4,269,631	$	4,269,631
Time deposits	1,527,402		1,534,876		1,557,340		1,565,558
Securities sold under repurchase agreements	491,058		491,058		516,243		516,243
Other borrowed funds	6		6		7		7
Accrued interest payable	8,255		8,255		8,123		8,123
Long-term debt	37,191		34,562		37,200		34,341
Subordinated debentures held by subsidiary trusts	123,715		110,196		123,715		102,525
Level 3 inputs:
Derivative contract	—		—		383		383
Total financial liabilities	$	6,571,059	$	6,562,385	$	6,512,642	$	6,496,811