Heartland Financial USA (HTLF) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 05, 2013
Document Information [Line Items]	'	'
Entity Registrant Name	'HEARTLAND FINANCIAL USA INC	'
Entity Central Index Key	'0000920112	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	18,359,484

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$160,225	$160,223
Federal funds sold and other short-term investments	4,783	7,831
Cash and cash equivalents	165,008	168,054
Time deposits in other financial institutions	3,605	0
Securities:	'	'
Trading, at fair value	1,219	380
Available for sale, at fair value (cost of $1,409,106 at September 30, 2013, and $1,472,565 at December 31, 2012)	1,391,610	1,506,075
Held to maturity, at cost (fair value of $53,893 at September 30, 2013, and $55,982 at December 31, 2012)	53,841	55,502
Loans held for sale	61,326	96,165
Loans and leases receivable:	'	'
Held to maturity	2,901,706	2,821,549
Loans covered by loss share agreements	5,876	7,253
Allowance for loan and lease losses	-41,311	-38,715
Loans and leases receivable, net	2,866,271	2,790,087
Premises, furniture and equipment, net	129,029	128,294
Other real estate, net	33,018	35,822
Goodwill	30,627	30,627
Other intangible assets, net	23,435	18,486
Cash surrender value on life insurance	79,238	75,480
FDIC indemnification asset	795	749
Other assets	73,708	84,832
TOTAL ASSETS	4,912,730	4,990,553
Deposits:	'	'
Demand	1,073,688	974,232
Savings	2,043,397	2,004,438
Time	807,913	866,990
Total deposits	3,924,998	3,845,660
Short-term borrowings	224,048	224,626
Other borrowings	322,538	389,025
Accrued expenses and other liabilities	44,543	126,703
TOTAL LIABILITIES	4,516,127	4,586,014
STOCKHOLDERS' EQUITY:	'	'
Common stock (par value $1 per share; authorized 25,000,000 shares; issued 16,952,561 shares at September 30, 2013 and 16,827,835 shares at December 31, 2012)	16,953	16,828
Capital surplus	52,641	50,359
Retained earnings	259,172	236,279
Accumulated other comprehensive income (loss)	-13,819	16,641
Treasury stock at cost (1,508 shares at September 30, 2013, and 0 shares at December 31, 2012)	-42	0
TOTAL STOCKHOLDERS' EQUITY	396,603	401,805
Noncontrolling interest	0	2,734
TOTAL EQUITY	396,603	404,539
TOTAL LIABILITIES AND EQUITY	4,912,730	4,990,553
Preferred Stock [Member]	'	'
STOCKHOLDERS' EQUITY:	'	'
Preferred stock	0	0
Series A Preferred Stock [Member]	'	'
STOCKHOLDERS' EQUITY:	'	'
Preferred stock	0	0
Series C Preferred Stock [Member]	'	'
STOCKHOLDERS' EQUITY:	'	'
Preferred stock	$81,698	$81,698

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Cost of available for sale securities	$1,409,106,000	$1,472,565,000
Fair value of held to maturity securities	53,893,000	55,982,000
Common stock, par value (in dollars per share)	$1	$1
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	16,952,561	16,827,835
Treasury stock shares	1,508	0
Preferred Stock [Member]	'	'
Preferred stock, par value (in dollars per share)	$1	$1
Preferred stock, shares authorized	20,604	20,604
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series A Preferred Stock [Member]	'	'
Preferred stock, par value (in dollars per share)	$1	$1
Preferred stock, shares authorized	16,000	16,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series C Preferred Stock [Member]	'	'
Preferred stock, par value (in dollars per share)	$1	$1
Preferred stock, shares authorized	81,698	81,698
Preferred stock, shares issued	81,698	81,698
Preferred stock, shares outstanding	81,698	81,698
Preferred stock, liquidation value	$81,700,000	$81,700,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
INTEREST INCOME:	'	'	'	'
Interest and fees on loans and leases	$40,154	$39,208	$119,707	$116,989
Interest on securities:	'	'	'	'
Taxable	4,803	4,452	14,174	17,050
Nontaxable	3,443	2,896	10,001	7,786
Interest on federal funds sold	0	0	0	1
Interest on interest bearing deposits in other financial institutions	3	3	9	5
TOTAL INTEREST INCOME	48,403	46,559	143,891	141,831
INTEREST EXPENSE:	'	'	'	'
Interest on deposits	4,769	5,504	14,911	16,883
Interest on short-term borrowings	131	215	387	652
Interest on other borrowings (includes $523 and $1,552 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2013, respectively)	3,623	4,028	11,122	12,114
TOTAL INTEREST EXPENSE	8,523	9,747	26,420	29,649
NET INTEREST INCOME	39,880	36,812	117,471	112,182
Provision for loan and lease losses	5,149	-502	7,648	4,852
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	34,731	37,314	109,823	107,330
NONINTEREST INCOME:	'	'	'	'
Service charges and fees	4,487	3,944	12,775	11,240
Loan servicing income	3,984	3,016	11,461	7,832
Trust fees	2,918	2,667	8,764	7,940
Brokerage and insurance commissions	1,277	908	3,315	2,757
Securities gains, net (includes $1,118 and $6,612 of net security gains reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2013, respectively)	1,118	5,212	6,612	14,106
Gain (loss) on trading account securities	263	-163	839	-117
Impairment loss on securities	0	0	0	-981
Gains on sale of loans held for sale	5,251	13,750	24,246	34,941
Valuation adjustment on mortgage servicing rights	0	-493	496	-674
Income on bank owned life insurance	409	382	1,129	1,131
Other noninterest income	1,011	543	2,407	3,257
TOTAL NONINTEREST INCOME	20,718	29,766	72,044	81,432
NONINTEREST EXPENSES:	'	'	'	'
Salaries and employee benefits	28,847	27,064	88,103	76,444
Occupancy	3,387	2,596	9,796	7,612
Furniture and equipment	1,917	1,541	6,033	4,504
Professional fees	4,486	4,217	12,262	10,938
FDIC insurance assessments	745	811	2,508	2,482
Advertising	1,360	1,183	3,836	3,558
Intangible assets amortization	196	146	594	399
Net loss on repossessed assets	1,069	3,775	4,886	7,986
Other noninterest expenses	5,140	5,826	14,642	14,835
TOTAL NONINTEREST EXPENSES	47,147	47,159	142,660	128,758
INCOME BEFORE INCOME TAXES	8,302	19,921	39,207	60,004
Income taxes (includes $222 and $1,887 of income tax expense reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2013, respectively)	1,492	6,338	10,289	19,642
NET INCOME	6,810	13,583	28,918	40,362
Net (income) loss available to noncontrolling interest, net of tax	0	4	-64	23
NET INCOME ATTRIBUTABLE TO HEARTLAND	6,810	13,587	28,854	40,385
Preferred dividends and discount	-276	-949	-889	-2,991
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$6,534	$12,638	$27,965	$37,394
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$0.39	$0.77	$1.65	$2.27
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	$0.38	$0.75	$1.63	$2.24
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$0.10	$0.10	$0.30	$0.30

Consolidated_Statements_of_Inc1

Consolidated Statements of Income (Unaudited) (Parenthetical) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Interest on other borrowings	$3,623	$11,122
Securities gains, net	1,118	6,612
Income taxes	1,492	10,289
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Derivatives [Member]	'	'
Interest on other borrowings	523	1,552
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'
Securities gains, net	1,118	6,612
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other Comprehensive Income (Loss) [Member]	'	'
Income taxes	$222	$1,887

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
NET INCOME	$6,810	$13,583	$28,918	$40,362
Securities:	'	'	'	'
Net change in unrealized gain (loss) on securities available for sale	-4,857	17,908	-44,394	26,873
Reclassification adjustment for net gain realized in net income	-1,118	-5,212	-6,612	-13,125
Net change in non-credit related other than temporary impairment	24	24	72	-636
Income taxes	2,229	-4,788	19,036	-4,949
Other comprehensive income (loss) on securities available for sale	-3,722	7,932	-31,898	8,163
Derivatives used in cash flow hedging relationships:	'	'	'	'
Unrealized gain (loss) on derivatives	-366	-770	733	-2,223
Reclassification adjustment for net loss on derivatives realized in net income	523	501	1,552	1,486
Income taxes	-54	103	-847	275
Other comprehensive income (loss) on cash flow hedges	103	-166	1,438	-462
Other comprehensive income (loss)	-3,619	7,766	-30,460	7,701
Comprehensive income (loss)	3,191	21,349	-1,542	48,063
Less: comprehensive (income) loss attributable to noncontrolling interest	0	4	-64	23
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO HEARTLAND	$3,191	$21,353	($1,606)	$48,086

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income	$28,918	$40,362
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	12,599	10,128
Provision for loan and lease losses	7,648	4,852
Net amortization of premium on securities	22,417	16,348
Securities gains, net	-6,612	-14,106
(Increase) decrease in trading account securities	-839	117
Impairment loss on securities	0	981
Stock based compensation	1,538	1,611
Loss on sale of OREO and other repossessed property	2,440	5,862
Loans originated for sale	-1,203,402	-1,103,278
Proceeds on sales of loans held for sale	1,262,487	1,092,318
Net gains on sales of loans held for sale	-24,246	-34,941
(Increase) decrease in accrued interest receivable	94	-2,298
Decrease in prepaid expenses	8,645	3,037
Decrease in accrued interest payable	-843	-626
Capitalization of mortgage servicing rights	-10,595	-7,916
Valuation adjustment on mortgage servicing rights	-496	674
Other, net	-3,825	3,311
NET CASH PROVIDED BY OPERATING ACTIVITIES	95,928	16,436
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchase of time deposits in other financial institutions	-3,605	0
Proceeds from the sale of securities available for sale	347,170	488,350
Proceeds from the maturity of and principal paydowns on securities available for sale	191,683	230,868
Proceeds from the maturity of and principal paydowns on securities held to maturity	1,982	1,414
Purchase of securities available for sale	-545,831	-760,281
Net increase in loans and leases	-97,741	-173,818
Purchase of bank owned life insurance policies	-2,835	-4,571
Capital expenditures	-8,442	-13,817
Net cash and cash equivalents received in acquisition	0	41,939
Proceeds on sale of OREO and other repossessed assets	14,304	23,143
NET CASH USED BY INVESTING ACTIVITIES	-103,315	-166,773
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Net increase in demand deposits and savings accounts	138,415	250,433
Net decrease in time deposit accounts	-59,077	-10,903
Net decrease in short-term borrowings	-578	-24,773
Proceeds from other borrowings	160	11,103
Repayments of other borrowings	-66,647	-6,387
Purchase of noncontrolling interest	-2,798	0
Purchase of treasury stock	-1,601	-2,485
Proceeds from issuance of common stock	2,360	2,401
Excess tax benefits on exercised stock options	68	174
Dividends paid	-5,961	-7,934
NET CASH PROVIDED BY FINANCING ACTIVITIES	4,341	211,629
Net increase (decrease) in cash and cash equivalents	-3,046	61,292
Cash and cash equivalents at beginning of year	168,054	129,834
CASH AND CASH EQUIVALENTS AT END OF PERIOD	165,008	191,126
Supplemental disclosures:	'	'
Cash paid for income/franchise taxes	4,819	8,136
Cash paid for interest	27,263	30,275
Loans transferred to OREO	13,318	20,192
Purchases of securities available for sale, accrued, not paid	$7,540	$11,435

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Unaudited) (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
In Thousands, unless otherwise specified
Balance at beginning of period at Dec. 31, 2011	$352,893	$81,698	$16,612	$43,333	$198,182	$12,147	($1,754)	$2,675
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Comprehensive income	48,086	'	'	'	40,385	7,724	'	-23
Comprehensive income	48,063	'	'	'	'	'	'	'
Cash dividends declared:	'	'	'	'	'	'	'	'
Preferred	-2,989	'	'	'	-2,989	'	'	'
Common	-4,945	'	'	'	-4,945	'	'	'
Purchase of shares of common stock	-2,485	'	'	'	'	'	-2,485	'
Issuance of shares of common stock	2,575	'	'	686	'	'	1,889	'
Commitments to issue common stock	1,611	'	'	1,611	'	'	'	'
Balance at end of period at Sep. 30, 2012	394,746	81,698	16,612	45,630	230,633	19,871	-2,350	2,652
Balance at beginning of period at Dec. 31, 2012	404,539	81,698	16,828	50,359	236,279	16,641	0	2,734
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Comprehensive income	-1,606	'	'	'	'	'	'	'
Comprehensive income	-1,542	'	'	'	28,854	-30,460	'	64
Cash dividends declared:	'	'	'	'	'	'	'	'
Preferred	-889	'	'	'	-889	'	'	'
Common	-5,072	'	'	'	-5,072	'	'	'
Purchase of noncontrolling interest	-2,798	'	'	'	'	'	'	-2,798
Purchase of shares of common stock	-1,601	'	'	'	'	'	-1,601	'
Issuance of shares of common stock	2,428	'	125	744	'	'	1,559	'
Commitments to issue common stock	1,538	'	'	1,538	'	'	'	'
Balance at end of period at Sep. 30, 2013	$396,603	$81,698	$16,953	$52,641	$259,172	($13,819)	($42)	$0

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash dividends per share preferred stock (in dollars per share)	$10.89	$36.60
Cash dividends per share common stock (in dollars per share)	$0.30	$0.30
Shares of common stock purchased	59,174	113,438
Shares of common stock issued	182,392	133,889

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	BASIS OF PRESENTATION
	The interim unaudited consolidated financial statements contained herein should be read in conjunction with the audited consolidated financial statements and accompanying notes to the consolidated financial statements for the fiscal year ended December 31, 2012, included in the Form 10-K of Heartland Financial USA, Inc. ("Heartland") filed with the Securities and Exchange Commission on March 15, 2013. Accordingly, footnote disclosures which would substantially duplicate the disclosure contained in the audited consolidated financial statements have been omitted.
	The financial information of Heartland included herein has been prepared in accordance with U.S. generally accepted accounting principles for interim financial reporting and has been prepared pursuant to the rules and regulations for reporting on Form 10-Q and Rule 10-01 of Regulation S-X. Such information reflects all adjustments (consisting of normal recurring adjustments), that are, in the opinion of management, necessary for a fair presentation of the financial position and results of operations for the periods presented. The results of the interim period ended September 30, 2013, are not necessarily indicative of the results expected for the year ending December 31, 2013.
	Earnings Per Share
	Basic earnings per share is determined using net income available to common stockholders and weighted average common shares outstanding. Diluted earnings per share is computed by dividing net income available to common stockholders by the weighted average common shares and assumed incremental common shares issued. Amounts used in the determination of basic and diluted earnings per share for the three month and nine month periods ended September 30, 2013 and 2012, are shown in the tables below:
		Three Months Ended
		September 30,
	(Dollars and number of shares in thousands, except per share data)	2013				2012
	Net income attributable to Heartland	$	6,810			$	13,587
	Preferred dividends and discount	(276		)		(949		)
	Net income available to common stockholders	$	6,534			$	12,638
	Weighted average common shares outstanding for basic earnings per share	16,936				16,474
	Assumed incremental common shares issued for common stock equivalents	285				272
	Weighted average common shares for diluted earnings per share	17,221				16,746
	Earnings per common share — basic	$	0.39			$	0.77
	Earnings per common share — diluted	$	0.38			$	0.75
	Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	105				446
		Nine Months Ended
		September 30,
	(Dollars and number of shares in thousands, except per share data)	2013				2012
	Net income attributable to Heartland	$	28,854			$	40,385
	Preferred dividends and discount	(889		)		(2,991		)
	Net income available to common stockholders	$	27,965			$	37,394
	Weighted average common shares outstanding for basic earnings per share	16,904				16,484
	Assumed incremental common shares issued for common stock equivalents	279				246
	Weighted average common shares for diluted earnings per share	17,183				16,730
	Earnings per common share — basic	$	1.65			$	2.27
	Earnings per common share — diluted	$	1.63			$	2.24
	Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	105				446
	Stock-Based Compensation
	Heartland may grant, through its Nominating and Compensation Committee (the "Compensation Committee"), non-qualified and incentive stock options, stock appreciation rights, stock awards, restricted stock, restricted stock units and cash incentive awards, under its 2012 Long-Term Incentive Plan (the "Plan"). The Plan, which was approved by stockholders in May 2012 and replaced Heartland's 2005 Long-Term Incentive Plan with respect to grants after such approval, reserved 450,796 shares of common stock at September 30, 2013, for issuance under future awards that may be granted under the Plan to employees and directors of, and service providers to, Heartland or its subsidiaries.
	Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 718, "Compensation-Stock Compensation" requires the measurement of the cost of employee services received in exchange for an award of equity instruments based upon the fair value of the award on the grant date. The cost of the award is based upon its fair value estimated on the date of grant and recognized in the consolidated statements of income over the vesting period of the award. The fair market value of restricted stock and restricted stock units is based on the fair value of the underlying shares of common stock on the date of grant. The fair value of stock options is estimated on the date of grant using the Black-Scholes model.
	Restricted Stock Units
	The Plan permits the Compensation Committee to grant restricted stock units ("RSUs"). On January 22, 2013, the Compensation Committee granted time-based RSUs with respect to 72,595 shares of common stock and on January 17, 2012, granted time-based RSUs with respect to 94,001 shares of common stock, to selected officers. The time-based RSUs, which represent the right, without payment, to receive shares of Heartland common stock at a specified date in the future based on specific vesting conditions, vest over five years in three equal installments on the third, fourth and fifth anniversaries of the grant date, will be settled in common stock upon vesting, and will not be entitled to dividends until vested. The time-based RSUs terminate upon termination of employment, except that the 2012 RSUs continue to vest after retirement if retirement occurs after the employee has attained age 62 and has provided at least five years of service to Heartland. Although the 2013 time-based RSUs do not vest at retirement, the Compensation Committee may exercise its discretion to provide for vesting upon retirement if the participant signs a non-solicitation and non-compete agreement.
	In addition to the time-based RSUs referenced in the preceding paragraph, the Compensation Committee granted performance-based RSUs with respect to 40,990 shares of common stock on January 22, 2013, and performance-based RSUs with respect to 49,801 shares of common stock on January 17, 2012, to Heartland executives and subsidiary presidents. These performance-based RSUs vest based first on performance measures tied to Heartland's earnings and assets on December 31 of the grant year, and then on time-based vesting conditions. For the grants awarded in 2013, the portion of the RSUs earned based on performance vest on December 31, 2015, if the executive remains employed on that date, and for the grants awarded in 2012, the portion of the RSUs earned based on performance vest on December 31, 2014, subject to employment on that date.
	Options
	Although the Plan provides authority to the Compensation Committee to grant stock options, no options were granted during the first nine months of 2013 and 2012. Prior to 2009, options were typically granted annually with an expiration date ten years after the date of grant. Vesting was generally over a five-year service period with portions of a grant becoming exercisable at three years, four years, and five years after the date of grant. A summary of the status of the stock options as of September 30, 2013 and 2012, and changes during the nine months ended September 30, 2013 and 2012, follows:
		2013							2012
		Shares			Weighted-Average Exercise Price				Shares		Weighted-Average Exercise Price
	Outstanding at January 1	377,907			$	22.62			570,762		$	21.06
	Granted	—			—				—		—
	Exercised	(68,586	)		19.54				(112,699	)	17.07
	Forfeited	(1,800	)		26.68				(12,334	)	23.68
	Outstanding at September 30	307,521			$	23.28			445,729		$	22
	Options exercisable at September 30	307,521			$	23.28			399,846		$	22.39
	At September 30, 2013, the vested options totaled 307,521 shares with a weighted average exercise price of $23.28 per share and a weighted average remaining contractual life of 2.99 years. The intrinsic value (the difference between the market price and the aggregate exercise price) for the vested options as of September 30, 2013, was $1.6 million. The intrinsic value for the total of all options exercised during the nine months ended September 30, 2013, was $571,000.
	The exercise price of stock options granted is established by the Compensation Committee, but the exercise price for the stock options may not be less than the fair market value of the shares on the date that the option is granted or, if greater, the par value of a share of stock. Each option granted is exercisable in full at any time or from time to time, subject to vesting provisions, as determined by the Compensation Committee and as provided in the option agreement, but such time may not exceed ten years from the grant date. Cash received from options exercised for the nine months ended September 30, 2013, was $1.3 million, with a related tax benefit of $68,000. Cash received from options exercised for the nine months ended September 30, 2012, was $1.9 million, with a related tax benefit of $174,000.
	Total compensation costs recorded for stock options and RSUs were $1.5 million and $1.6 million for the nine months ended September 30, 2013, and 2012, respectively. As of September 30, 2013, there were $3.3 million of total unrecognized compensation costs related to the 2005 and 2012 Long-Term Incentive Plans for stock options and RSUs which are expected to be recognized through 2016.
	Subsequent Events
	On October 18, 2013, Heartland acquired Morrill Bancshares, Inc. See Note 2, “Acquisitions,” for additional information regarding the acquisition.
	Heartland had no other subsequent events through the filing date of this quarterly report on Form 10-Q with the SEC.
	Effect of New Financial Accounting Standards
	In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment," which permits an entity to make a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset, other than goodwill, is impaired. Prior to this ASU, entities were required to quantitatively test indefinite-lived intangible assets for impairment at least annually and more frequently if indicators of impairment exist. Under the new standard, if an entity concludes, based on an evaluation of all relevant qualitative factors, that it is not more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount, it is not required to perform the quantitative impairment test for that asset. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.
	In September 2012, the FASB issued ASU No. 2012-06, "Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution," to address diversity in practice about how to subsequently measure an indemnification asset for a government-assisted acquisition that includes a loss-sharing agreement. This guidance requires a reporting entity to account for a change in the subsequent measurement of the indemnification asset on the same basis as the changes in the asset subject to indemnification. Heartland adopted this standard on January 1, 2013, and the adoption did not have a material impact on the accounting for its loss share receivable from the FDIC under its various loss share agreements.
	In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to address further disclosure of reclassification amounts out of other comprehensive income. The guidance requires that a reporting entity present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and income statement line items affected by the reclassification. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.
	In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," to eliminate the diversity in practice and to increase the comparability of financial statements among companies. The guidance requires that a reporting entity generally must show an unrecognized tax benefit, or a portion of an unrecognized tax benefit, for a net operating loss, or NOL, carryforward, similar tax loss or tax credit carryforward as a reduction of a deferred tax asset. However, the entity should present the unrecognized tax benefit as a liability and not as a reduction of a deferred tax asset if the carryforward or tax loss is not available on the financial statement date to settle any additional income tax liability that would result from the disallowance of the tax position under the applicable tax law, or the applicable tax law does not require the company to use, and the company does not intend to use, the carryforward or tax loss to settle additional income taxes resulting from the disallowance of the tax position. The guidance does not require any new recurring disclosures because it does not affect the recognition or measurement of uncertain tax positions. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Early adoption and retrospective application are both permitted. Heartland does not expect the adoption of this standard to have a material impact on the results of operations, financial position, and liquidity.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Acquisitions	'
	ACQUISITIONS
	On June 12, 2013, Heartland entered into a merger agreement with Morrill Bancshares, Inc., the holding company for The Morrill & Janes Bank and Trust Co. ("Bank"), based in Merriam, Kansas. As of September 30, 2013, the Bank had total assets of approximately $790 million, including $385 million of loans. The transaction closed on October 18, 2013. After the merger, The Morrill & Janes Bank and Trust Co. became Heartland's tenth independent, state-chartered, bank subsidiary and continues to operate under its current name and management team. The aggregate purchase price, which was based on the tangible book value of Morrill Bancshares, Inc., was approximately $55.4 million, $16.6 million or 30% of which was paid in cash, and $38.8 million or 70% of which was paid by delivery of 1,402,431 shares of Heartland common stock.

Securities

Securities	9 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
Securities	'
	SECURITIES
	The amortized cost, gross unrealized gains and losses, and estimated fair values of securities available for sale as of September 30, 2013, and December 31, 2012, are summarized in the table below, in thousands:
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair
					Gains			Losses				Value
	September 30, 2013
	U.S. government corporations and agencies	$	7,836		$	192		$	—			$	8,028
	Mortgage-backed securities	942,819			9,778			(19,450		)		933,147
	Obligations of states and political subdivisions	436,914			8,583			(16,662		)		428,835
	Total debt securities	1,387,569			18,553			(36,112		)		1,370,010
	Equity securities	21,537			63			—				21,600
	Total	$	1,409,106		$	18,616		$	(36,112	)		$	1,391,610
	December 31, 2012
	U.S. government corporations and agencies	$	21,002		$	443		$	(1	)		$	21,444
	Mortgage-backed securities	1,027,234			19,002			(10,035		)		1,036,201
	Obligations of states and political subdivisions	403,077			23,560			(192		)		426,445
	Total debt securities	1,451,313			43,005			(10,228		)		1,484,090
	Equity securities	21,252			733			—				21,985
	Total	$	1,472,565		$	43,738		$	(10,228	)		$	1,506,075
	At both September 30, 2013, and December 31, 2012, the amortized cost of the available for sale securities is net of $184,000 of credit related other-than-temporary impairment ("OTTI").
	The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of September 30, 2013, and December 31, 2012, are summarized in the table below, in thousands:
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair
					Gains			Losses				Value
	September 30, 2013
	Mortgage-backed securities	$	6,045		$	290		$	(238	)		$	6,097
	Obligations of states and political subdivisions	47,796			—			—				47,796
	Total	$	53,841		$	290		$	(238	)		$	53,893
	December 31, 2012
	Mortgage-backed securities	$	7,040		$	492		$	(12	)		$	7,520
	Obligations of states and political subdivisions	48,462			—			—				48,462
	Total	$	55,502		$	492		$	(12	)		$	55,982
	At September 30, 2013, the amortized cost of the held to maturity securities is net of $797,000 of credit related OTTI and $540,000 of non-credit related OTTI. At December 31, 2012, $797,000 of credit related OTTI and $612,000 of non-credit related OTTI was recorded.
	Approximately 84% of Heartland's mortgage-backed securities are issuances of government-sponsored enterprises.
	The amortized cost and estimated fair value of debt securities available for sale at September 30, 2013, by contractual maturity are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties.
		Amortized Cost			Estimated Fair Value
	Due in 1 year or less	$	7,737		$	7,808
	Due in 1 to 5 years	38,189			39,952
	Due in 5 to 10 years	47,239			48,207
	Due after 10 years	351,585			340,896
	Total debt securities	444,750			436,863
	Mortgage-backed securities	942,819			933,147
	Equity securities	21,537			21,600
	Total investment securities	$	1,409,106		$	1,391,610
	The amortized cost and estimated fair value of debt securities held to maturity at September 30, 2013, by contractual maturity are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties.
		Amortized Cost			Estimated Fair Value
	Due in 1 year or less	$	—		$	—
	Due in 1 to 5 years	1,281			1,281
	Due in 5 to 10 years	10,200			10,200
	Due after 10 years	36,315			36,315
	Total debt securities	47,796			47,796
	Mortgage-backed securities	6,045			6,097
	Total investment securities	$	53,841		$	53,893
	Gross gains and losses realized related to the sales of securities for the three and nine month periods ended September 30, are summarized as follows, in thousands:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Proceeds from sales	$	130,031		$	147,199		347,170			$	488,350
	Gross security gains	1,420			5,212			7,703			14,592
	Gross security losses	302			—			1,091			486
	The following tables summarize, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in Heartland's securities portfolio as of September 30, 2013, and December 31, 2012. The investments were segregated into two categories: those that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months. The reference point for determining how long an investment was in an unrealized loss position was September 30, 2012, and December 31, 2011, respectively. Securities for which Heartland has taken credit-related OTTI write-downs are categorized as being "less than 12 months" or "12 months or longer" in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down.
	Securities available for sale	Less than 12 months						12 months or longer							Total
		Fair Value			Unrealized			Fair Value				Unrealized			Fair Value		Unrealized
Losses					Losses							Losses
September 30, 2013
U.S. government corporations and agencies	$	—		$	—		$	—			$	—		$	—	$	—
Mortgage-backed securities	679,247			(18,529		)	30,886				(921		)	710,133		(19,450		)
Obligations of states and political subdivisions	255,451			(16,662		)	—				—			255,451		(16,662		)
Total temporarily impaired securities	$	934,698		$	(35,191	)	$	30,886			$	(921	)	$	965,584	$	(36,112	)
December 31, 2012
U.S. government corporations and agencies	$	1,517		$	(1	)	$	—			$	—		$	1,517	$	(1	)
Mortgage-backed securities	332,842			(9,121		)	24,489				(914		)	357,331		(10,035		)
Obligations of states and political subdivisions	22,503			(192		)	—				—			22,503		(192		)
Total temporarily impaired securities	$	356,862		$	(9,314	)	$	24,489			$	(914	)	$	381,351	$	(10,228	)
Securities held to maturity	Less than 12 months						12 months or longer							Total
	Fair Value			Unrealized			Fair Value				Unrealized			Fair Value		Unrealized
				Losses							Losses					Losses
September 30, 2013
Mortgage-backed securities	$	—		$	—		$	3,082			$	(238	)	$	3,082	$	(238	)
Obligations of states and political subdivisions	—			—			—				—			—		—
Total temporarily impaired securities	$	—		$	—		$	3,082			$	(238	)	$	3,082	$	(238	)
December 31, 2012
Mortgage-backed securities	$	—		$	—		$	3,296			$	(12	)	$	3,296	$	(12	)
Obligations of states and political subdivisions	—			—			—				—			—		—
Total temporarily impaired securities	$	—		$	—		$	3,296			$	(12	)	$	3,296	$	(12	)
Heartland reviews the investment securities portfolio on a quarterly basis to monitor its exposure to OTTI. A determination as to whether a security's decline in fair value is other-than-temporary takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors Heartland may consider in the OTTI analysis include the length of time the security has been in an unrealized loss position, changes in security ratings, financial condition of the issuer, as well as security and industry specific economic conditions. In addition, with regard to debt securities, Heartland may also evaluate payment structure, whether there are defaulted payments or expected defaults, prepayment speeds, and the value of any underlying collateral. For certain debt securities in unrealized loss positions, Heartland prepares cash flow analyses to compare the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. During the first quarter of 2012, Heartland experienced deterioration in the credit support on three private label mortgage-backed securities which resulted in a credit-related OTTI loss. The underlying collateral on these securities experienced an increased level of defaults and a slowing of voluntary prepayments causing the present value of the forward expected cash flows, using prepayment and default vectors, to be below the amortized cost basis of the securities. Based on Heartland's evaluation, a $981,000 OTTI on three private label mortgage-backed securities attributable to credit-related losses was recorded in March 2012. The other-than-temporary credit-related losses were $797,000 in the held to maturity category and $184,000 in the available for sale category.
The remaining unrealized losses on Heartland's mortgage-backed securities are the result of changes in market interest rates or widening of market spreads subsequent to the initial purchase of the securities and not related to concerns regarding the underlying credit of the issuers or the underlying collateral. It is expected that the securities will not be settled at a price less than the amortized cost of the investment. Because the decline in fair value is attributable to changes in interest rates or widening market spreads and not credit quality, and because Heartland has the intent and ability to hold these investments until a market price recovery or to maturity and does not believe it will be required to sell the securities before maturity, these investments are not considered other-than-temporarily impaired.
Unrealized losses on Heartland's obligations of states and political subdivisions are the result of changes in market interest rates or widening of market spreads subsequent to the initial purchase of the securities. Management monitors the credit quality and financial stability of the underlying municipalities. Because the decline in fair value is attributable to changes in interest rates or what management believes to be temporary market conditions and not underlying credit quality, and because Heartland has the intent and ability to hold these investments until a market price recovery or to maturity and does not believe it will be required to sell the securities before maturity, these investments are not considered other-than-temporarily impaired.
There were no gross realized gains or losses on the sale of available for sale securities with OTTI write-downs for the periods ended September 30, 2013, or December 31, 2012.
The following table shows the detail of total OTTI write-downs included in earnings, in thousands:
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013				2012
Available for sale debt securities:
Mortgage backed securities	$	—		$	—		$	—			$	184
Held to maturity debt securities:
Mortgage backed securities	—			—			—				797
Total debt security OTTI write-downs included in earnings	$	—		$	—		$	—			$	981
The following table shows the detail of OTTI write-downs on debt securities included in earnings and the related changes in other accumulated comprehensive income ("AOCI") for the same securities, in thousands:
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013				2012
Recorded as part of gross realized losses:
Credit related OTTI	$	—		$	—		$	—			$	981
Intent to sell OTTI	—			—			—				—
Total recorded as part of gross realized losses	—			—			—				981
Recorded directly to AOCI for non-credit related impairment:
Residential mortgage backed securities	—			—			—				683
Accretion of non-credit related impairment	(24		)	(24		)	(72		)		(47		)
Total changes to AOCI for non-credit related impairment	(24		)	(24		)	(72		)		636
Total OTTI losses (accretion) recorded on debt securities, net	$	(24	)	$	(24	)	$	(72	)		$	1,617
Heartland has not experienced any OTTI writedowns since the initial impairment charge in the first quarter of 2012.

Loans_and_Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans and Leases	'
	LOANS AND LEASES
	Loans and leases as of September 30, 2013, and December 31, 2012, were as follows, in thousands:
		September 30, 2013				December 31, 2012
	Loans and leases receivable held to maturity:
	Commercial	$	755,658			$	712,308
	Commercial real estate	1,287,337				1,289,184
	Agricultural and agricultural real estate	324,339				328,311
	Residential real estate	269,501				249,689
	Consumer	268,112				245,678
	Gross loans and leases receivable held to maturity	2,904,947				2,825,170
	Unearned discount	(232		)		(676		)
	Deferred loan fees	(3,009		)		(2,945		)
	Total net loans and leases receivable held to maturity	2,901,706				2,821,549
	Loans covered under loss share agreements:
	Commercial and commercial real estate	2,402				3,074
	Agricultural and agricultural real estate	446				748
	Residential real estate	2,433				2,645
	Consumer	595				786
	Total loans covered under loss share agreements	5,876				7,253
	Allowance for loan and lease losses	(41,311		)		(38,715		)
	Loans and leases receivable, net	$	2,866,271			$	2,790,087
	Heartland has certain lending policies and procedures in place that are designed to provide for an acceptable level of credit risk. The board of directors reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management and the board with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming loans and potential problem loans. Diversification in the loan portfolio is also a means of managing risk associated with fluctuations in economic conditions.
	The commercial and commercial real estate loan portfolio includes a wide range of business loans, including lines of credit for working capital and operational purposes and term loans for the acquisition of equipment and real estate. Although most loans are made on a secured basis, loans may be made on an unsecured basis where warranted by the overall financial condition of the borrower. Terms of commercial business loans generally range from one to five years. Commercial loans and leases are primarily made based on the identified cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. The collateral that Heartland requires for most of these loans and leases is based upon a discount from the market value of the collateral. The primary repayment risks of commercial loans and leases are that the cash flow of the borrowers may be unpredictable, and the collateral securing these loans may fluctuate in value. Heartland seeks to minimize these risks in a variety of ways. The underwriting analysis includes credit verification, analysis of global cash flows, appraisals and a review of the financial condition of the borrower. Personal guarantees are frequently required as a tertiary form of repayment. In addition, when underwriting loans for commercial real estate, careful consideration is given to the property's operating history, future operating projections, current and projected occupancy, location and physical condition. Heartland also utilizes government guaranteed lending through the U.S. Small Business Administration and the USDA Rural Development Business and Industry Program to assist customers with longer-term funding and to reduce risk.
	Agricultural loans, many of which are secured by crops, machinery and real estate, are provided to finance capital improvements and farm operations as well as acquisitions of livestock and machinery. Agricultural loans present unique credit risks relating to adverse weather conditions, loss of livestock due to disease or other factors, declines in market prices for agricultural products and the impact of government regulations. The ultimate repayment of agricultural loans is dependent upon the profitable operation or management of the agricultural entity. In underwriting agricultural loans, lending personnel work closely with their customers to review budgets and cash flow projections for the ensuing crop year. These budgets and cash flow projections are monitored closely during the year and reviewed with the customers at least annually. Lending personnel also work closely with governmental agencies, including the Farm Service Agency, to help agricultural customers obtain credit enhancement products such as loan guarantees or interest assistance.
	Heartland originates first-lien, adjustable-rate and fixed-rate, one-to-four-family residential real estate loans for the construction, purchase or refinancing of a single family residential property. These loans are principally collateralized by owner-occupied properties and are amortized over 10 to 30 years. Heartland typically sells longer-term, low-rate, residential mortgage loans in the secondary market with servicing rights retained. This practice allows Heartland to better manage interest rate risk and liquidity risk. The Heartland bank subsidiaries participate in lending programs sponsored by U.S. government agencies such as Veterans Administration and Federal Home Administration when justified by market conditions.
	Consumer lending includes motor vehicle, home improvement, home equity and small personal credit lines. Consumer loans typically have shorter terms, lower balances, higher yields and higher risks of default than one-to-four-family residential mortgage loans. Consumer loan collections are dependent on the borrower's continuing financial stability, and are therefore more likely to be affected by adverse personal circumstances. Risk is reduced through underwriting criteria, which include credit verification, appraisals, a review of the borrower's financial condition, and personal cash flows. A security interest, with title insurance when necessary, is taken in the underlying real estate. Heartland's consumer finance subsidiary, Citizens Finance Co., typically lends to borrowers with past credit problems or limited credit histories, which comprise approximately 25% of Heartland's total consumer loan portfolio.
	Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Heartland’s policy is to discontinue the accrual of interest income on any loan or lease when, in the opinion of management, there is a reasonable doubt as to the timely collection of the interest and principal, normally when a loan or lease is 90 days past due. When interest accruals are deemed uncollectible, interest credited to income in the current year is reversed and interest accrued in prior years is charged to the allowance for loan and lease losses. Nonaccrual loans and leases are returned to an accrual status when, in the opinion of management, the financial position of the borrower indicates that there is no longer any reasonable doubt as to the timely payment of interest and principal.
	Under Heartland’s credit practices, a loan is impaired when, based on current information and events, it is probable that Heartland will be unable to collect all amounts due according to the contractual terms of the loan agreement. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except where more practical, at the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent.
	The following table shows the balance in the allowance for loan and lease losses at September 30, 2013, and December 31, 2012, and the related loan balances, disaggregated on the basis of impairment methodology, in thousands. Loans evaluated under ASC 310-10-35 include loans on nonaccrual status and troubled debt restructurings, which are individually evaluated for impairment, and other impaired loans deemed to have similar risk characteristics. All other loans are collectively evaluated for impairment under ASC 450-20. Heartland has made no significant changes to the accounting for the allowance for loan and lease losses policy during 2013.
		Allowance For Loan and Lease Losses												Gross Loans and Leases Receivable Held to Maturity
		Ending Balance				Ending Balance Under ASC				Total				Ending Balance Evaluated for Impairment Under ASC				Ending Balance Evaluated for Impairment Under ASC				Total
		Under ASC				450-20								310-10-35				450-20
		310-10-35
	September 30, 2013
	Commercial	$	3,178			$	9,918			$	13,096			$	21,696			$	733,962			$	755,658
	Commercial real estate	838				13,205				14,043				28,018				1,259,319				1,287,337
	Agricultural and agricultural real estate	619				2,197				2,816				19,249				305,090				324,339
	Residential real estate	678				2,859				3,537				6,986				262,515				269,501
	Consumer	1,828				5,991				7,819				5,185				262,927				268,112
	Total	$	7,141			$	34,170			$	41,311			$	81,134			$	2,823,813			$	2,904,947
	December 31, 2012
	Commercial	$	1,350			$	10,038			$	11,388			$	9,031			$	703,277			$	712,308
	Commercial real estate	1,112				13,361				14,473				45,583				1,243,601				1,289,184
	Agricultural and agricultural real estate	109				2,029				2,138				16,128				312,183				328,311
	Residential real estate	783				2,760				3,543				7,443				242,246				249,689
	Consumer	1,270				5,903				7,173				5,391				240,287				245,678
	Total	$	4,624			$	34,091			$	38,715			$	83,576			$	2,741,594			$	2,825,170
	The following table presents nonaccrual loans, accruing loans past due 90 days or more and troubled debt restructured loans not covered under loss share agreements at September 30, 2013, and December 31, 2012, in thousands. There were no nonaccrual leases, accruing leases past due 90 days or more or restructured leases at September 30, 2013, and December 31, 2012.
		September 30, 2013				31-Dec-12
	Nonaccrual loans	$	28,339			$	38,675
	Nonaccrual troubled debt restructured loans	18,749				4,481
	Total nonaccrual loans	$	47,088			$	43,156
	Accruing loans past due 90 days or more	—				—
	Performing troubled debt restructured loans	$	19,371			$	21,121
	The following tables provide information on troubled debt restructured loans that were modified during the three months and nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Three Months Ended
		September 30,
		2013											2012
		Number			Pre-				Post-				Number			Pre-				Post-
		of Loans			Modification				Modification				of Loans			Modification				Modification
					Recorded				Recorded							Recorded				Recorded
					Investment				Investment							Investment				Investment
	Commercial	—			$	—			$	—			—			$	—			$	—
Commercial real estate	—			—				—				—			—				—
Total commercial and commercial real estate	—			—				—				—			—				—
Agricultural and agricultural real estate	—			—				—				—			—				—
Residential real estate	1			65				65				1			87				87
Consumer	—			—				—				—			—				—
Total	1			$	65			$	65			1			$	87			$	87
	Nine Months Ended
	September 30,
	2013											2012
	Number			Pre-				Post-				Number			Pre-				Post-
	of Loans			Modification				Modification				of Loans			Modification				Modification
				Recorded				Recorded							Recorded				Recorded
				Investment				Investment							Investment				Investment
Commercial	3			$	17,873			$	17,873			—			$	—			$	—
Commercial real estate	—			—				—				2			1,396				1,396
Total commercial and commercial real estate	3			17,873				17,873				2			1,396				1,396
Agricultural and agricultural real estate	3			2,576				2,576				2			276				276
Residential real estate	4			762				762				1			87				87
Consumer	1			166				166				1			1,152				1,152
Total	11			$	21,377			$	21,377			6			$	2,911			$	2,911
The pre-modification and post-modification recorded investment represents amounts as of the date of loan modification. Since the modifications on these loans have been only interest rate concessions and term extensions, not principal reductions, the pre-modification and post-modification recorded investment amounts are the same.
The following tables provide information on troubled debt restructured loans for which there was a payment default during the three months and nine months ended September 30, 2013, and September 30, 2012, in thousands, that had been modified during the twelve-month period prior to the default:
	With Payment Defaults During the Following Periods
	Three Months Ended
	September 30,
	2013							2012
	Number of			Recorded				Number of			Recorded
	Loans			Investment				Loans			Investment
Commercial	1			$	13,000			—			$	—
Commercial real estate	—			—				1			1,380
Total commercial and commercial real estate	1			13,000				1			1,380
Agricultural and agricultural real estate	—			—				—			—
Residential real estate	—			—				2			59
Consumer	—			—				—			—
Total	1			$	13,000			3			$	1,439
	With Payment Defaults During the Following Periods
	Nine Months Ended
	September 30,
	2013							2012
	Number of			Recorded				Number of			Recorded
	Loans			Investment				Loans			Investment
Commercial	2			$	17,670			—			$	—
Commercial real estate	—			—				1			1,380
Total commercial and commercial real estate	2			17,670				1			1,380
Agricultural and agricultural real estate	—			—				—			—
Residential real estate	2			167				2			59
Consumer	—			—				—			—
Total	4			$	17,837			3			$	1,439
Heartland's internal rating system is a series of grades reflecting management's risk assessment, based on its analysis of the borrower's financial condition. The "pass" category consists of all loans that are not in the "nonpass" category, categorized into a range of loan grades that reflect increasing, though still acceptable, risk. Movement of risk through the various grade levels in the pass category is monitored for early identification of credit deterioration. The "nonpass" category consists of special mention, substandard, doubtful and loss loans. The "special mention" rating is attached to loans where the borrower exhibits negative financial trends due to borrower specific or systemic conditions that, if left uncorrected, threaten its capacity to meet its debt obligations. The borrower is believed to have sufficient financial flexibility to react to and resolve its negative financial situation. These credits are closely monitored for improvement or deterioration. The "substandard" rating is assigned to loans that are inadequately protected by the current sound net worth and paying capacity of the borrower and may be further at risk due to deterioration in the value of collateral pledged. Well-defined weaknesses jeopardize liquidation of the debt. These loans are still considered collectible, however, a distinct possibility exists that Heartland will sustain some loss if deficiencies are not corrected. Substandard loans may exhibit some or all of the following weaknesses: deteriorating trends, lack of earnings, inadequate debt service capacity, excessive debt and/or lack of liquidity. The "doubtful" rating is assigned to loans where identified weaknesses make collection or liquidation in full, on the basis of existing facts, conditions and values, highly questionable and improbable. These borrowers are usually in default, lack liquidity and capital, as well as, resources necessary to remain an operating entity. Specific pending events, such as capital injections, liquidations or perfection of liens on additional collateral, may strengthen the credit, thus deferring classification of the loan as loss until exact status can be determined. The "loss" rating is assigned to loans considered uncollectible. As of September 30, 2013, Heartland had one loan classified as doubtful and no loans classified as loss. Loans are placed on "nonaccrual" when management does not expect to collect payments of principal and interest in full or when principal or interest has been in default for a period of 90 days or more, unless the loan is both well secured and in the process of collection.
The following table presents loans and leases not covered by loss share agreements by credit quality indicator at September 30, 2013, and December 31, 2012, in thousands:
	Pass				Nonpass				Total
September 30, 2013
Commercial	$	695,073			$	60,585			$	755,658
Commercial real estate	1,159,006				128,331				1,287,337
Total commercial and commercial real estate	1,854,079				188,916				2,042,995
Agricultural and agricultural real estate	280,501				43,838				324,339
Residential real estate	253,502				15,999				269,501
Consumer	257,682				10,430				268,112
Total gross loans and leases receivable held to maturity	$	2,645,764			$	259,183			$	2,904,947
December 31, 2012
Commercial	$	661,118			$	51,190			$	712,308
Commercial real estate	1,134,784				154,400				1,289,184
Total commercial and commercial real estate	1,795,902				205,590				2,001,492
Agricultural and agricultural real estate	286,264				42,047				328,311
Residential real estate	227,925				21,764				249,689
Consumer	235,232				10,446				245,678
Total gross loans and leases receivable held to maturity	$	2,545,323			$	279,847			$	2,825,170
The nonpass category in the table above is comprised of approximately 50% special mention, 45% substandard, and 5% doubtful as of September 30, 2013. The percent of nonpass loans on nonaccrual status as of September 30, 2013 was 18%. As of December 31, 2012, the nonpass category in the table above was comprised of approximately 50% special mention and 50% substandard. The percent of nonpass loans on nonaccrual status as of December 31, 2012, was 15%. The doubtful loan at September 30, 2013, is a $13.0 million secured loan to a bank holding company that was placed on nonaccrual at September 30, 2013, and has a specific reserve of $2.2 million. Loans delinquent 30 to 89 days as a percent of total loans were 0.69% at September 30, 2013. Changes in credit risk are monitored on a continuous basis and changes in risk ratings are made when identified. All impaired loans are reviewed at least annually.
The following table sets forth information regarding Heartland's accruing and nonaccrual loans and leases not covered by loss share agreements at September 30, 2013, and December 31, 2012, in thousands:
	Accruing Loans and Leases
	30-59 Days				60-89 Days				90 Days				Total				Current				Nonaccrual		Total Loans and Leases
	Past Due				Past Due				or More				Past Due
									Past Due
September 30, 2013
Commercial	$	3,537			$	76			$	—			$	3,613			$	733,222			$	18,823	$	755,658
Commercial real estate	2,611				495				—				3,106				1,270,831				13,400		1,287,337
Total commercial and commercial real estate	6,148				571				—				6,719				2,004,053				32,223		2,042,995
Agricultural and agricultural real estate	9,021				132				—				9,153				309,128				6,058		324,339
Residential real estate	236				—				—				236				263,620				5,645		269,501
Consumer	3,282				797				—				4,079				260,871				3,162		268,112
Total gross loans and leases receivable held to maturity	$	18,687			$	1,500			$	—			$	20,187			$	2,837,672			$	47,088	$	2,904,947
December 31, 2012
Commercial	$	1,143			$	525			$	—			$	1,668			$	708,459			$	2,181	$	712,308
Commercial real estate	1,631				494				—				2,125				1,259,112				27,947		1,289,184
Total commercial and commercial real estate	2,774				1,019				—				3,793				1,967,571				30,128		2,001,492
Agricultural and agricultural real estate	687				—				—				687				324,545				3,079		328,311
Residential real estate	1,278				234				—				1,512				241,860				6,317		249,689
Consumer	2,434				803				—				3,237				238,809				3,632		245,678
Total gross loans and leases receivable held to maturity	$	7,173			$	2,056			$	—			$	9,229			$	2,772,785			$	43,156	$	2,825,170
The majority of Heartland's impaired loans are those that are nonaccrual, are past due 90 days or more and still accruing or have had their terms restructured in a troubled debt restructuring. The following tables present, for impaired loans not covered by loss share agreements and by category of loan, the unpaid contractual balance at September 30, 2013, and December 31, 2012; the outstanding loan balance recorded on the consolidated balance sheets at September 30, 2013, and December 31, 2012; any related allowance recorded for those loans as of September 30, 2013, and December 31, 2012; the average outstanding loan balance recorded on the consolidated balance sheets during the three months and nine months ended September 30, 2013, and year ended December 31, 2012; and the interest income recognized on the impaired loans during the three months and nine months ended September 30, 2013, and year ended December 31, 2012, in thousands:
	Unpaid				Loan				Related				Quarter-to-				Quarter-to-				Year-to-		Year-to-
	Contractual				Balance				Allowance				Date				Date				Date		Date
	Balance								Recorded				Avg. Loan				Interest				Avg.		Interest
													Balance				Income				Loan		Income
																	Recognized				Balance		Recognized
September 30, 2013
Impaired loans with a related allowance:
Commercial	$	15,026			$	15,026			$	3,178			$	5,892			$	21			$	3,560	$	51
Commercial real estate	7,223				7,027				838				8,494				81				7,625		250
Total commercial and commercial real estate	22,249				22,053				4,016				14,386				102				11,185		301
Agricultural and agricultural real estate	7,363				7,363				619				12,965				22				6,885		65
Residential real estate	2,746				2,736				678				3,187				3				3,330		13
Consumer	3,706				3,706				1,828				3,591				32				3,483		82
Total loans held to maturity	$	36,064			$	35,858			$	7,141			$	34,129			$	159			$	24,883	$	461
Impaired loans without a related allowance:
Commercial	$	7,512			$	6,670			$	—			$	14,980			$	44			$	10,242	$	56
Commercial real estate	26,390				20,991				—				19,507				171				26,630		284
Total commercial and commercial real estate	33,902				27,661				—				34,487				215				36,872		340
Agricultural and agricultural real estate	11,886				11,886				—				6,691				125				10,828		370
Residential real estate	4,782				4,250				—				4,463				23				4,102		62
Consumer	1,494				1,479				—				1,501				9				1,505		24
Total loans held to maturity	$	52,064			$	45,276			$	—			$	47,142			$	372			$	53,307	$	796
Total impaired loans held to maturity:
Commercial	$	22,538			$	21,696			$	3,178			$	20,872			$	65			$	13,802	$	107
Commercial real estate	33,613				28,018				838				28,001				252				34,255		534
Total commercial and commercial real estate	56,151				49,714				4,016				48,873				317				48,057		641
Agricultural and agricultural real estate	19,249				19,249				619				19,656				147				17,713		435
Residential real estate	7,528				6,986				678				7,650				26				7,432		75
Consumer	5,200				5,185				1,828				5,092				41				4,988		106
Total impaired loans held to maturity	$	88,128			$	81,134			$	7,141			$	81,271			$	531			$	78,190	$	1,257
	Unpaid				Loan				Related				Year-to-				Year-to-
	Contractual				Balance				Allowance				Date				Date
	Balance								Recorded				Avg.				Interest
													Loan				Income
													Balance				Recognized
December 31, 2012
Impaired loans with a related allowance:
Commercial	$	2,904			$	2,904			$	1,350			$	5,082			$	88
Commercial real estate	6,403				6,384				1,112				12,671				813
Total commercial and commercial real estate	9,307				9,288				2,462				17,753				901
Agricultural and agricultural real estate	1,493				1,493				109				379				83
Residential real estate	3,197				3,170				783				2,737				89
Consumer	3,876				3,836				1,270				3,781				204
Total loans held to maturity	$	17,873			$	17,787			$	4,624			$	24,650			$	1,277
Impaired loans without a related allowance:
Commercial	$	6,596			$	6,127			$	—			$	3,813			$	186
Commercial real estate	48,967				39,199				—				41,814				689
Total commercial and commercial real estate	55,563				45,326				—				45,627				875
Agricultural and agricultural real estate	14,654				14,635				—				13,728				539
Residential real estate	4,741				4,273				—				3,861				65
Consumer	1,708				1,555				—				1,630				18
Total loans held to maturity	$	76,666			$	65,789			$	—			$	64,846			$	1,497
Total impaired loans held to maturity:
Commercial	$	9,500			$	9,031			$	1,350			$	8,895			$	274
Commercial real estate	55,370				45,583				1,112				54,485				1,502
Total commercial and commercial real estate	64,870				54,614				2,462				63,380				1,776
Agricultural and agricultural real estate	16,147				16,128				109				14,107				622
Residential real estate	7,938				7,443				783				6,598				154
Consumer	5,584				5,391				1,270				5,411				222
Total impaired loans held to maturity	$	94,539			$	83,576			$	4,624			$	89,496			$	2,774
On July 2, 2009, Heartland acquired all deposits of The Elizabeth State Bank in Elizabeth, Illinois through its subsidiary Galena State Bank & Trust Co. based in Galena, Illinois, in a whole bank loss sharing transaction facilitated by the FDIC. As of July 2, 2009, The Elizabeth State Bank had loans of $42.7 million. The estimated fair value of the loans acquired was $37.8 million.
The acquired loans and other real estate owned are covered by two loss share agreements between the FDIC and Galena State Bank & Trust Co., which affords Galena State Bank & Trust Co. significant loss protection. Under the loss share agreements, the FDIC covers 80% of the covered loan and other real estate owned losses (referred to as covered assets) up to $10 million and 95% of losses in excess of that amount. The term for loss sharing on non-residential real estate losses is five years with respect to losses and eight years with respect to recoveries, while the term for loss sharing on residential real estate loans is ten years with respect to losses and recoveries. The reimbursable losses from the FDIC are based on the book value of the relevant loan as determined by the FDIC at the date of the transaction. New loans made after the acquisition are not covered by the loss share agreements.
The Elizabeth State Bank acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Purchased loans acquired in a business combination, which include loans purchased in The Elizabeth State Bank acquisition, are recorded at estimated fair value on their purchase date, but the purchaser cannot carry over the related allowance for loan and lease losses. Purchased loans are accounted for under ASC 310-30, “Loans and Debt Securities with Deteriorated Credit Quality,” when the loans have evidence of credit deterioration since origination and it is probable at the date of the acquisition that Heartland will not collect all contractually required principal and interest payments. Evidence of credit quality deterioration at the purchase date included statistics such as past due and nonaccrual status. Generally, acquired loans that meet Heartland’s definition for nonaccrual status fall within the scope of ASC 310-30. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable difference which is included in the carrying value of the loans. Subsequent decreases to the expected cash flows will generally result in a provision for loan and lease losses. Subsequent increases in cash flows result in a reversal of the provision for loan and lease losses to the extent of prior charges, or a reclassification of the difference from nonaccretable to accretable with a positive impact on future interest income. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of such cash flows.
The carrying amount of the loans covered by these loss share agreements at September 30, 2013, and December 31, 2012, consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands:
	September 30, 2013												December 31, 2012
	Impaired				Non				Total				Impaired				Non				Total
	Purchased				Impaired				Covered				Purchased				Impaired				Covered
	Loans				Purchased				Loans				Loans				Purchased				Loans
					Loans												Loans
Commercial and commercial real estate	$	530			$	1,872			$	2,402			$	598			$	2,476			$	3,074
Agricultural and agricultural real estate	—				446				446				—				748				748
Residential real estate	—				2,433				2,433				—				2,645				2,645
Consumer loans	500				95				595				89				697				786
Total Covered Loans	$	1,030			$	4,846			$	5,876			$	687			$	6,566			$	7,253
On the acquisition date, the preliminary estimate of the contractually required payments receivable for all loans with evidence of credit deterioration since origination acquired in the acquisition was $13.8 million and the estimated fair value of the loans was $9.0 million. At September 30, 2013, and December 31, 2012, a majority of these loans were valued based upon the liquidation value of the underlying collateral, because the expected cash flows are primarily based on the liquidation of underlying collateral and the timing and amount of the cash flows could not be reasonably estimated. There was no allowance for loan and lease losses related to these ASC 310-30 loans at September 30, 2013, and December 31, 2012.
On the acquisition date, the preliminary estimate of the contractually required payments receivable for all nonimpaired loans acquired in the acquisition was $28.9 million and the estimated fair value of the loans was $28.7 million.

Allowance_for_Loan_and_Lease_L

Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2013
Allowance for Loan and Lease Losses [Abstract]	'
Allowance for Loan and Lease Losses	'
	ALLOWANCE FOR LOAN AND LEASE LOSSES
	Changes in the allowance for loan and lease losses for the three months and nine months ended September 30, 2013, and September 30, 2012, were as follows, in thousands:
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	9,436		$	13,671		$	3,055		$	3,580		$	7,881		$	—		$	—	$	37,623
	30-Jun-13
	Charge-offs	(163		)	(630		)	—			(450		)	(1,270		)	—			—		(2,513		)
	Recoveries	78			514			1			76			383			—			—		1,052
	Provision	3,745			488			(240		)	331			825			—			—		5,149
	Balance at	$	13,096		$	14,043		$	2,816		$	3,537		$	7,819		$	—		$	—	$	41,311
	30-Sep-13
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	11,388		$	14,473		$	2,138		$	3,543		$	7,173		$	—		$	—	$	38,715
	31-Dec-12
	Charge-offs	(1,422		)	(2,561		)	(23		)	(856		)	(3,488		)	—			—		(8,350		)
	Recoveries	983			1,279			100			102			834			—			—		3,298
	Provision	2,147			852			601			748			3,300			—			—		7,648
	Balance at	$	13,096		$	14,043		$	2,816		$	3,537		$	7,819		$	—		$	—	$	41,311
	30-Sep-13
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	10,287		$	17,057		$	2,002		$	3,899		$	8,193		$	1		$	—	$	41,439
	30-Jun-12
	Charge-offs	(107		)	(1,668		)	(1		)	(100		)	(1,174		)	—			—		(3,050		)
	Recoveries	1,550			717			1			95			151			—			—		2,514
	Provision	(462		)	(806		)	55			(26		)	738			(1		)	—		(502		)
	Balance at	$	11,268		$	15,300		$	2,057		$	3,868		$	7,908		$	—		$	—	$	40,401
	30-Sep-12
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	10,547		$	14,621		$	1,763		$	3,001		$	6,874		$	2		$	—	$	36,808
	31-Dec-11
	Charge-offs	(814		)	(2,762		)	(1		)	(376		)	(2,959		)	—			—		(6,912		)
	Recoveries	1,799			2,996			82			161			615			—			—		5,653
	Provision	(264		)	445			213			1,082			3,378			(2		)	—		4,852
	Balance at	$	11,268		$	15,300		$	2,057		$	3,868		$	7,908		$	—		$	—	$	40,401
	30-Sep-12

Goodwill_Core_Deposit_Premium_

Goodwill, Core Deposit Premium and Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill, Core Deposit Premium and Other Intangible Assets	'
	GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS
	Heartland had goodwill of $30.6 million at both September 30, 2013, and December 31, 2012.
	Other intangible assets consist of core deposit intangibles, mortgage servicing rights and customer relationship intangible. The gross carrying amount of other intangible assets and the associated accumulated amortization at September 30, 2013, and December 31, 2012, are presented in the table below, in thousands:
		September 30, 2013								December 31, 2012
		Gross			Accumulated			Net		Gross		Accumulated		Net
		Carrying			Amortization			Carrying		Carrying		Amortization		Carrying
		Amount						Amount		Amount				Amount
	Amortizing intangible assets:
	Core deposit intangibles	$	11,668		$	9,887		$	1,781	$	11,668	$	9,327	$	2,341
	Mortgage servicing rights	31,095			9,899			21,196		22,892		7,239		15,653
	Customer relationship intangible	1,177			719			458		1,177		685		492
	Total	$	43,940		$	20,505		$	23,435	$	35,737	$	17,251	$	18,486
	The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands:
		Core			Mortgage			Customer
		Deposit			Servicing			Relationship
		Intangibles			Rights			Intangible		Total
	Three months ending December 31, 2013	$	181		$	1,575		$	11	$	1,767
	Year ending December 31,
	2014	468			6,540			43		7,051
	2015	267			5,232			42		5,541
	2016	238			3,924			41		4,203
	2017	212			2,616			40		2,868
	2018	187			1,309			39		1,535
	Thereafter	228			—			242		470
	Projections of amortization expense for mortgage servicing rights are based on existing asset balances and the existing interest rate environment as of September 30, 2013. Heartland's actual experience may be significantly different depending upon changes in mortgage interest rates and market conditions. Mortgage loans serviced for others were $2.89 billion and $2.20 billion as of September 30, 2013, and December 31, 2012, respectively. The fair value of Heartland's mortgage servicing rights was estimated at $31.2 million and $16.0 million at September 30, 2013, and December 31, 2012, respectively. Valuation allowances of $0 and $496,000 were required as of September 30, 2013, and December 31, 2012, respectively.
	The majority of Heartland's mortgage servicing rights portfolio is comprised of loans serviced for the Federal National Mortgage Association ("FNMA") and the Federal Home Loan Mortgage Corporation ("FHLMC"), which are separated into 15- and 30-year tranches. At September 30, 2013, the 30-year tranche had a fair value of $23.6 million in comparison with the book value of $16.2 million. At December 31, 2012, the 30-year tranche had a fair value of $12.6 million in comparison with the book value of $12.6 million, which was net of the related valuation allowance of $496,000. At September 30, 2013, the 15-year tranche had a fair value of $4.8 million in comparison with the book value of $3.2 million. At December 31, 2012, the 15-year tranche had a fair value of $3.3 million in comparison with the book value of $3.0 million.
	In addition to servicing FNMA and FHLMC loans, Heartland became an authorized servicer of Government National Mortgage Association ("GNMA") mortgages in late 2012. At September 30, 2013, the GNMA tranche had a fair value of $2.8 million and a book value of $1.8 million.
	The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights:
		2013			2012
	Balance at January 1	$	15,653		$	11,276
	Originations	10,595			7,916
	Amortization	(5,548		)	(4,727		)
	Valuation adjustment	496			(674		)
	Balance at September 30	$	21,196		$	13,791

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Borrowings	'
	BORROWINGS
	On June 14, 2013, Heartland replaced one of its $5.0 million unsecured revolving lines of credit at an unaffiliated bank with a $20.0 million unsecured revolving line of credit at the same unaffiliated bank, resulting in a total borrowing capacity of up to $25.0 million at any one time. The new agreement matures on June 14, 2014. Heartland had no outstanding balance on its two lines of credit as of September 30, 2013.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	DERIVATIVE FINANCIAL INSTRUMENTS
	Heartland uses derivative financial instruments as part of its interest rate risk management strategy. As part of the strategy, Heartland considers the use of interest rate swaps, caps, floors and collars and certain interest rate lock commitments and forward sales of securities related to mortgage banking activities. Heartland's current strategy includes the use of interest rate swaps, interest rate lock commitments, and forward sales of mortgage securities. Heartland's objectives are to add stability to its net interest margin and to manage its exposure to movements in interest rates. The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. Heartland is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. Heartland minimizes this risk by entering into derivative contracts with large, stable financial institutions. Heartland has not experienced any losses from nonperformance by these counterparties. Heartland monitors counterparty risk in accordance with the provisions of ASC 815. In addition, interest rate-related derivative instruments generally contain language outlining collateral pledging requirements for each counterparty. Collateral must be posted when the market value exceeds certain threshold limits which are determined by credit ratings of each counterparty. Heartland was required to pledge $6.2 million and $6.7 million of cash as collateral at September 30, 2013, and December 31, 2012, respectively. Heartland's counterparties were required to pledge $15,000 and $0 at September 30, 2013, and December 31, 2012, respectively.
	Heartland's derivative and hedging instruments are recorded at fair value on the consolidated balance sheets. See Note 9, “Fair Value,” for additional fair value information and disclosures.
	Cash Flow Hedges
	Heartland has variable rate funding which creates exposure to variability in interest payments due to changes in interest rates. To manage the interest rate risk related to the variability of interest payments, Heartland has entered into various interest rate swap agreements. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are received or made on Heartland's variable-rate liabilities. For the nine months ended September 30, 2013, the change in net unrealized losses on cash flow hedges reflects changes in the fair value of the swaps and reclassification from accumulated other comprehensive income to interest expense totaling $1.6 million. For the next twelve months, Heartland estimates that cash payments and reclassification from accumulated other comprehensive income to interest expense will total $2.1 million.
	Heartland executed an interest rate swap transaction on April 5, 2011, with an effective date of April 20, 2011, and an expiration date of April 20, 2016, to effectively convert $15.0 million of its newly issued variable rate amortizing debt to fixed rate debt. For accounting purposes, this swap transaction is designated as a cash flow hedge of the changes in cash flows attributable to changes in one-month LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on an amount of Heartland's debt principal equal to the then-outstanding swap notional amount. At inception, Heartland asserted that the underlying principal balance would remain outstanding throughout the hedge transaction making it probable that sufficient LIBOR-based interest payments would exist through the maturity date of the swap.
	During the first quarter of 2009, Heartland entered into three forward-starting interest rate swap transactions to effectively convert $65.0 million of its variable interest rate subordinated debentures (issued in connection with the trust preferred securities of Heartland Financial Statutory Trust IV, V and VII) to fixed interest rate debt. For accounting purposes, these three swap transactions are designated as cash flow hedges of the changes in cash flows attributable to changes in LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on $65.0 million of Heartland's subordinated debentures (issued in connection with the trust preferred securities of Heartland Financial Statutory Trust IV, V and VII) that reset quarterly on a specified reset date. At inception, Heartland asserted that the underlying principal balance would remain outstanding throughout the hedge transaction making it probable that sufficient LIBOR-based interest payments would exist through the maturity date of the swaps.
	The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at September 30, 2013, and December 31, 2012, in thousands:
		Notional				Fair				Balance	Receive			Weighted		Maturity
		Amount				Value				Sheet	Rate			Average
										Category				Pay Rate
	September 30, 2013
	Interest rate swap	$	12,046			$	(509	)		Other Liabilities	2.93	%		5.14	%	4/20/16
	Interest rate swap	25,000				(289		)		Other Liabilities	0.254	%		2.58	%	3/17/14
	Interest rate swap	20,000				(1,637		)		Other Liabilities	0.26	%		3.22	%	3/1/17
	Interest rate swap	20,000				(1,905		)		Other Liabilities	0.271	%		3.355	%	1/7/20
	December 31, 2012
	Interest rate swap	$	13,002			$	(711	)		Other Liabilities	2.961	%		5.14	%	4/20/16
	Interest rate swap	25,000				(708		)		Other Liabilities	0.308	%		2.58	%	3/17/14
	Interest rate swap	20,000				(2,186		)		Other Liabilities	0.311	%		3.22	%	3/1/17
	Interest rate swap	20,000				(3,020		)		Other Liabilities	0.351	%		3.355	%	1/7/20
	The table below identifies the gains and losses recognized on Heartland's derivative instruments designated as cash flow hedges for the nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Effective Portion									Ineffective Portion
		Recognized in OCI				Reclassified from AOCI into Income					Recognized in Income on Derivatives
		Amount of Gain (Loss)				Category		Amount of Gain (Loss)			Category		Amount of Gain (Loss)
	September 30, 2013
	Interest rate swap	$	203			Interest Expense		$	(210	)	Other Income		$	—
	Interest rate swap	419				Interest Expense		(436		)	Other Income		—
	Interest rate swap	548				Interest Expense		(446		)	Other Income		—
	Interest rate swap	1,115				Interest Expense		(460		)	Other Income		—
	September 30, 2012
	Interest rate swap	$	(58	)		Interest Expense		$	(226	)	Other Income		$	—
	Interest rate swap	189				Interest Expense		(397		)	Other Income		—
	Interest rate swap	(262		)		Interest Expense		(421		)	Other Income		—
	Interest rate swap	(606		)		Interest Expense		(442		)	Other Income		—
	Mortgage Derivatives
	Heartland also has entered into interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans and mortgage backed securities that are considered derivative instruments. The fair value of these commitments is recorded on the consolidated balance sheets with the changes in fair value recorded in the consolidated statements of income as a component of gains on sale of loans held for sale. These derivative contracts are designated as free standing derivative contracts and are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and therefore do not qualify for hedge accounting treatment.
	The table below identifies the balance sheet category and fair values of Heartland's derivative instruments not designated as hedging instruments at September 30, 2013, and December 31, 2012, in thousands:
		Balance Sheet Category		Notional				Fair
				Amount				Value
	September 30, 2013
	Interest rate lock commitments (mortgage)	Other Assets		$	104,098			$	4,601
	Forward commitments	Other Assets		69,100				1,271
	Forward commitments	Other Liabilities		185,942				(3,320		)
	December 31, 2012
	Interest rate lock commitments (mortgage)	Other Assets		$	267,397			$	9,353
	Forward commitments	Other Assets		168,910				462
	Forward commitments	Other Liabilities		351,996				(1,221		)
	The table below identifies the income statement category of the gains and losses recognized in income on Heartland's derivative instruments not designated as hedging instruments for the nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Income Statement Category		Year-to-Date
				Gain (Loss) Recognized
	September 30, 2013
	Interest rate lock commitments (mortgage)	Gains on sale of loans held for sale		$	(6,047	)
	Forward commitments	Gains on sale of loans held for sale		(1,289		)
	September 30, 2012
	Interest rate lock commitments (mortgage)	Gains on sale of loans held for sale		$	12,759
	Forward commitments	Gains on sale of loans held for sale		(3,870		)

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	FAIR VALUE
	Heartland utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Securities available for sale, trading securities and derivatives are recorded in the consolidated balance sheets at fair value on a recurring basis. Additionally, from time to time, Heartland may be required to record at fair value other assets on a nonrecurring basis such as loans held for sale, loans held to maturity and certain other assets including, but not limited to, mortgage servicing rights and other real estate owned. These nonrecurring fair value adjustments typically involve application of lower of cost or fair value accounting or write-downs of individual assets.
	Fair Value Hierarchy
	Under ASC 820, assets and liabilities are grouped at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:
	Level 1 — Valuation is based upon quoted prices for identical instruments in active markets.
	Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, or similar instruments in markets that are not active, and model-based valuation techniques for all significant assumptions are observable in the market.
	Level 3 — Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.
	The following is a description of valuation methodologies used for assets and liabilities recorded at fair value on a recurring or non-recurring basis.
	Assets
	Securities Available for Sale and Held to Maturity
	Securities available for sale are recorded at fair value on a recurring basis. Securities held to maturity are generally recorded at cost and are recorded at fair value only to the extent a decline in fair value is determined to be other-than-temporary. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security's credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, as well as U.S. Treasury securities. Level 2 securities include U.S. government and agency securities, mortgage-backed securities and private collateralized mortgage obligations, municipal bonds and corporate debt securities. Level 3 securities consist primarily of z-TRANCHE mortgage-backed securities. On a quarterly basis, a secondary independent pricing service is used for a sample of securities to validate the pricing from Heartland's primary pricing service.
	Trading Assets
	Trading assets are recorded at fair value and consist of securities held for trading purposes. The valuation method for trading securities is the same as the methodology used for securities classified as available for sale.
	Loans Held for Sale
	Loans held for sale are carried at the lower of cost or fair value on an aggregate basis. The fair value of loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, Heartland classifies loans held for sale subjected to nonrecurring fair value adjustments as Level 2.
	Loans Held to Maturity
	Heartland does not record loans held to maturity at fair value on a recurring basis. However, from time to time, a loan is considered impaired and an allowance for loan losses is established. Loans for which it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement are considered impaired. Once a loan is identified as individually impaired, management measures impairment in accordance with ASC 310. The fair value of impaired loans is measured using one of the following impairment methods: 1) the present value of expected future cash flows discounted at the loan's effective interest rate or 2) the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent. In accordance with ASC 820, impaired loans measured at fair value are classified as nonrecurring Level 3 in the fair value hierarchy.
	Mortgage Servicing Rights
	Mortgage servicing rights assets represent the value associated with servicing residential real estate loans that have been sold to outside investors with servicing retained. Heartland uses the amortization method (i.e., the lower of amortized cost or estimated fair value measured on a nonrecurring basis), not fair value measurement accounting, to determine the carrying value of its mortgage servicing rights. The fair value for servicing assets is determined through discounted cash flow analysis and utilizes discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of these assumptions require a significant degree of management estimation and judgment. Mortgage servicing rights are subject to impairment testing. The carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value as performed by an outside third party. For purposes of measuring impairment, the rights are stratified into certain risk characteristics including note type and note term. If the valuation model reflects a value less than the carrying value, mortgage servicing rights are adjusted to fair value through a valuation allowance. Heartland classifies mortgage servicing rights as nonrecurring with Level 3 measurement inputs.
	Derivative Financial Instruments
	Heartland's current interest rate risk strategy includes interest rate swaps, interest rate lock commitments, and forward sales of securities. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. To comply with the provisions of ASC 820, Heartland incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, Heartland has considered the impact of netting any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.
	Although Heartland has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of September 30, 2013, and December 31, 2012, Heartland has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, Heartland has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.
	Mortgage Derivatives
	Mortgage derivatives include interest rate lock commitments to originate held for sale residential mortgage loans for individual customers and forward commitments to sell residential mortgage loans and mortgage backed securities to various investors. The fair value of these derivative instruments is primarily based on quoted prices for similar assets in active markets that Heartland has the ability to access and are classified in Level 2 of the fair value hierarchy.
	Other Real Estate Owned
	Other real estate owned ("OREO") represents property acquired through foreclosures and settlements of loans. Property acquired is carried at the fair value of the property at the time of acquisition (representing the property's cost basis), plus any acquisition costs, or the estimated fair value of the property, less disposal costs. Heartland considers third party appraisals, as well as independent fair value assessments from realtors or persons involved in selling OREO, in determining the fair value of particular properties. Accordingly, the valuation of OREO is subject to significant external and internal judgment. Heartland periodically reviews OREO to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. OREO is classified as nonrecurring Level 3.
	The table below presents Heartland's assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2013, and December 31, 2012, in thousands, aggregated by the level in the fair value hierarchy within which those measurements fall:
		Total Fair Value			Level 1			Level 2		Level 3
	September 30, 2013
	Trading securities	$	1,219		$	1,219		$	—	$	—
	Securities available for sale	1,391,610			8,028			1,378,625		4,957
	Derivative assets	5,872			—			5,872		—
	Total assets at fair value	$	1,398,701		$	9,247		$	1,384,497	$	4,957
	Derivative liabilities	$	7,660		$	—		$	7,660	$	—
	Total liabilities at fair value	$	7,660		$	—		$	7,660	$	—
	December 31, 2012
	Trading securities	$	380		$	380		$	—	$	—
	Securities available for sale	1,506,075			12,811			1,488,924		4,340
	Derivative assets	9,815			—			9,815		—
	Total assets at fair value	$	1,516,270		$	13,191		$	1,498,739	$	4,340
	Derivative liabilities	$	7,846		$	—		$	7,846	$	—
	Total liabilities at fair value	$	7,846		$	—		$	7,846	$	—
	There were no transfers between Levels 1, 2, or 3 during the three month and nine month periods ended September 30, 2013.
	As of December 31, 2012, Heartland revised the classification of government sponsored agency securities from previous filings. In previous filings, government sponsored agency securities were classified as Level 1 under ASC 820. Heartland revised the classifications to Level 2 as of December 31, 2012, as the determination of fair value requires model based pricing or pricing based on similar securities. The resulting change in presentation does not have a material impact on the financial statements and did not affect the method by which Heartland estimates fair value, nor the resulting fair values.
	The tables below present Heartland's assets that are measured at fair value on a nonrecurring basis, in thousands:
		Fair Value Measurements at September 30, 2013
		Total			Quoted Prices in			Significant Other		Significant		Losses
					Active Markets for			Observable		Unobservable
					Identical Assets			Inputs		Inputs
					(Level 1)			(Level 2)		(Level 3)
	Collateral dependent impaired loans:
	Commercial	$	12,455		$	—		$	—	$	12,455	$	472
	Commercial real estate	8,004			—			—		8,004		1,374
	Agricultural and agricultural real estate	6,749			—			—		6,749		—
	Residential real estate	3,284			—			—		3,284		—
	Consumer	1,936			—			—		1,936		14
	Total collateral dependent impaired loans	$	32,428		$	—		$	—	$	32,428	$	1,860
	Other real estate owned	$	33,018		$	—		$	—	$	33,018	$	2,440
		Fair Value Measurements at December 31, 2012
		Total			Quoted Prices in			Significant Other		Significant		Losses
					Active Markets for			Observable		Unobservable
					Identical Assets			Inputs		Inputs
					(Level 1)			(Level 2)		(Level 3)
Collateral dependent impaired loans
Commercial	$	7,681		$	—		$	—	$	7,681	$	1,799
Commercial real estate	44,471			—			—		44,471		6,898
Agricultural and agricultural real estate	16,019			—			—		16,019		1
Residential real estate	6,660			—			—		6,660		988
Consumer	4,121			—			—		4,121		4,818
Total collateral dependent impaired loans	$	78,952		$	—		$	—	$	78,952	$	14,504
Other real estate owned	$	35,822		$	—		$	—	$	35,822	$	6,953
Mortgage servicing rights	$	15,956		$	—		$	—	$	15,956	$	477
The following tables present additional quantitative information about assets measured at fair value and for which Heartland has utilized Level 3 inputs to determine fair value, in thousands:
	Quantitative Information About Level 3 Fair Value Measurements
	Fair Value			Valuation		Unobservable	Range
	at 9/30/13			Technique		Input	(Weighted Average)
z-TRANCHE Securities	$	4,957		Discounted cash flows		Pretax discount rate	7.00 - 9.00%
						Actual defaults	12.71-20.14% (15.52%)
						Actual deferrals	6.25-22.35% (11.32%)
Collateral dependent impaired loans:
Commercial	12,455			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Commercial real estate	8,004			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Agricultural and agricultural real estate	6,749			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Residential real estate	3,284			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Consumer	1,936			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Other real estate owned	33,018			Modified appraised value		Third party appraisal	NM*
						Appraisal discount
* Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.
	Quantitative Information About Level 3 Fair Value Measurements
	Fair Value			Valuation		Unobservable	Range
	at 12/31/12			Technique		Input	(Weighted Average)
z-TRANCHE Securities	$	4,340		Discounted cash flows		Pretax discount rate	8.00 - 10.00%
						Actual defaults	13.94-20.94% (15.52%)
						Actual deferrals	6.30-23.71% (11.32%)
Collateral dependent impaired loans:
Commercial	7,681			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Commercial real estate	44,471			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Agricultural and agricultural real estate	16,019			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Residential real estate	6,660			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Consumer	4,121			Modified appraised value		Third party appraisal	NM*
						Appraisal discount	NM*
Other real estate owned	35,822			Modified appraised value		Third party appraisal	NM*
						Appraisal discount
Mortgage servicing rights	15,956			Discounted cash flows		Prepayment speeds, servicing costs and escrow analysis	Average CPR Life
							12.99 - 18.71%
							-18.05%
* Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.
The changes in fair value of Level 3 assets that are measured on a recurring basis are summarized in the following table, in thousands:
	For the Nine Months Ended			For the Year Ended
	September 30, 2013			December 31, 2012
Balance at January 1,	$	4,340		$	3,243
Total gains (losses):
Included in earnings	642			—
Included in other comprehensive income	794			938
Purchases, issuances, sales and settlements:
Purchases	—			195
Sales	(651		)	—
Settlements	(168		)	(36		)
Balance at period end	$	4,957		$	4,340
The tables below summarize the estimated fair value of Heartland's financial instruments as defined by ASC 825 as of September 30, 2013, and December 31, 2012, in thousands. The carrying amounts in the following tables are recorded in the consolidated balance sheets under the indicated captions. In accordance with ASC 825, the assets and liabilities that are not financial instruments are not included in the disclosure, such as the value of the mortgage servicing rights, premises, furniture and equipment, goodwill and other intangibles and other liabilities.
Heartland does not believe that the estimated information presented herein is representative of the earnings power or value of Heartland. The following analysis, which is inherently limited in depicting fair value, also does not consider any value associated with either existing customer relationships or the ability of Heartland to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.
							Fair Value Measurements at
							30-Sep-13
	Carrying			Estimated			Quoted Prices in		Significant Other		Significant
	Amount			Fair			Active Markets for		Observable		Unobservable
				Value			Identical Assets		Inputs		Inputs
							(Level 1)		(Level 2)		(Level 3)
Financial assets:
Cash and cash equivalents	$	165,008		$	165,008		$	165,008	$	—	$	—
Time deposits in other financial institutions	3,605			3,605			3,605		—		—
Securities:
Trading	1,219			1,219			1,219		—		—
Available for sale	1,391,610			1,391,610			8,028		1,378,625		4,957
Held to maturity	53,841			53,893			—		53,893		—
Total securities	1,446,670			1,446,722			9,247		1,432,518		4,957
Loans held for sale	61,326			61,640			—		61,640		—
Loans, net:
Commercial	741,728			735,522			—		723,067		12,455
Commercial real estate	1,274,043			1,276,194			—		1,268,190		8,004
Agricultural and agricultural real estate	322,502			323,236			—		316,487		6,749
Residential real estate	267,341			259,334			—		256,050		3,284
Consumer	260,657			263,888			—		261,952		1,936
Total Loans, net	2,866,271			2,858,174			—		2,825,746		32,428
Derivatives	5,872			5,872			—		5,872		—
Financial liabilities:
Deposits
Demand deposits	1,073,688			1,073,688			—		1,073,688		—
Savings deposits	2,043,397			2,043,397			—		2,043,397		—
Time deposits	807,913			807,913			—		807,913		—
Short term borrowings	224,048			224,048			—		224,048		—
Other borrowings	322,538			321,074			—		321,074		—
Derivatives	7,660			7,660			—		7,660		—
							Fair Value Measurements at
							31-Dec-12
	Carrying			Estimated			Quoted Prices in		Significant Other		Significant
	Amount			Fair			Active Markets for		Observable		Unobservable
				Value			Identical Assets		Inputs		Inputs
							(Level 1)		(Level 2)		(Level 3)
Financial assets:
Cash and cash equivalents	$	168,054		$	168,054		$	168,054	$	—	$	—
Securities:
Trading	380			380			380		—		—
Available for sale	1,506,075			1,506,075			12,811		1,488,924		4,340
Held to maturity	55,502			55,982			—		55,982		—
Total securities	1,561,957			1,562,437			13,191		1,544,906		4,340
Loans held for sale	96,165			96,165			—		96,165		—
Loans, net:
Commercial	700,225			691,605			—		683,924		7,681
Commercial real estate	1,275,770			1,281,031			—		1,236,560		44,471
Agricultural and agricultural real estate	326,867			329,443			—		313,424		16,019
Residential real estate	248,608			237,050			—		230,390		6,660
Consumer	238,617			241,978			—		237,857		4,121
Total Loans, net	2,790,087			2,781,107			—		2,702,155		78,952
Mortgage derivatives	9,815			9,815			—		9,815		—
Financial liabilities:
Deposits
Demand deposits	974,232			974,232			—		974,232		—
Savings deposits	2,004,438			2,004,438			—		2,004,438		—
Time deposits	866,990			866,990			—		866,990		—
Short term borrowings	224,626			224,626			—		224,626		—
Other borrowings	389,025			376,422			—		376,422		—
Derivatives	7,846			7,846			—		7,846		—
Cash and Cash Equivalents — The carrying amount is a reasonable estimate of fair value due to the short-term nature of these instruments.
Time Deposits in Other Financial Institutions — The carrying amount is a reasonable estimate of fair value due to the short-term nature of these instruments.
Securities — For securities either held to maturity, available for sale or trading, fair value equals quoted market price if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities. For Level 3 securities, Heartland utilizes independent pricing provided by third party vendors or brokers.
Loans and Leases — The fair value of loans is estimated using an entrance price concept by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The fair value of impaired loans is measured using the present value of expected future cash flows discounted at the loan's effective interest rate or the fair value of the underlying collateral. The fair value of loans held for sale is estimated using quoted market prices.
Mortgage Derivatives — The fair value of these instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis of the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities.
Derivatives — The fair value of all derivatives is estimated based on the amount that Heartland would pay or would be paid to terminate the contract or agreement, using current rates and, when appropriate, the current creditworthiness of the counter-party.
Deposits — The fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for deposits of similar remaining maturities. If the fair value of the fixed maturity certificates of deposit is calculated at less than the carrying amount, the carrying value of these deposits is reported as the fair value.
Short-term and Other Borrowings — Rates currently available to Heartland for debt with similar terms and remaining maturities are used to estimate fair value of existing debt.
Commitments to Extend Credit, Unused Lines of Credit and Standby Letters of Credit — Based upon management's analysis of the off balance sheet financial instruments, there are no significant unrealized gains or losses associated with these financial instruments based upon review of the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties.

Segment_Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2013
Mortgage Banking [Abstract]	'
Segment Reporting	'
	SEGMENT REPORTING
	Heartland has identified two operating segments for purposes of financial reporting: community and other banking and retail mortgage banking. These segments were determined based on the products and services provided or the type of customers served and is consistent with the information used by Heartland's key decision makers to make operating decisions and to assess Heartland's performance. The following tables present financial information from Heartland's operating segments for the three-month and nine-month periods ended September 30, 2013, and 2012, in thousands.
		Three Months Ended
		September 30,
		2013							2012
		Community		Retail			Total		Community			Retail		Total
		and Other		Mortgage					and Other			Mortgage
		Banking		Banking					Banking			Banking
	Net interest income	$	39,291	$	589		$	39,880	$	36,412		$	400	$	36,812
	Provision for loan losses	5,149		—			5,149		(502		)	—		(502		)
	Total noninterest income	12,309		8,409			20,718		13,988			15,778		29,766
	Total noninterest expense	36,813		10,334			47,147		35,597			11,562		47,159
	Income (loss) before taxes	$	9,638	$	(1,336	)	$	8,302	$	15,305		$	4,616	$	19,921
	Segment Assets	$	4,825,781	$	86,949		$	4,912,730	$	4,467,574		$	125,623	$	4,593,197
	Average Loans	$	2,867,933	$	69,575		$	2,937,508	$	2,628,811		$	98,995	$	2,727,806
		Nine Months Ended
		September 30,
		2013							2012
		Community		Retail			Total		Community			Retail		Total
		and Other		Mortgage					and Other			Mortgage
		Banking		Banking					Banking			Banking
	Net interest income	$	115,968	$	1,503		$	117,471	$	110,332		$	1,850	$	112,182
	Provision for loan losses	7,648		—			7,648		4,852			—		4,852
	Total noninterest income	37,630		34,414			72,044		40,902			40,530		81,432
	Total noninterest expense	108,877		33,783			142,660		99,902			28,856		128,758
	Income (loss) before taxes	$	37,073	$	2,134		$	39,207	$	46,480		$	13,524	$	60,004
	Segment Assets	$	4,825,781	$	86,949		$	4,912,730	$	4,467,574		$	125,623	$	4,593,197
	Average Loans	$	2,820,418	$	86,552		$	2,906,970	$	2,570,493		$	90,063	$	2,660,556

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Effect of New Financial Accounting Standards	'
	Effect of New Financial Accounting Standards
	In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment," which permits an entity to make a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset, other than goodwill, is impaired. Prior to this ASU, entities were required to quantitatively test indefinite-lived intangible assets for impairment at least annually and more frequently if indicators of impairment exist. Under the new standard, if an entity concludes, based on an evaluation of all relevant qualitative factors, that it is not more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount, it is not required to perform the quantitative impairment test for that asset. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.
	In September 2012, the FASB issued ASU No. 2012-06, "Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution," to address diversity in practice about how to subsequently measure an indemnification asset for a government-assisted acquisition that includes a loss-sharing agreement. This guidance requires a reporting entity to account for a change in the subsequent measurement of the indemnification asset on the same basis as the changes in the asset subject to indemnification. Heartland adopted this standard on January 1, 2013, and the adoption did not have a material impact on the accounting for its loss share receivable from the FDIC under its various loss share agreements.
	In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to address further disclosure of reclassification amounts out of other comprehensive income. The guidance requires that a reporting entity present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and income statement line items affected by the reclassification. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.
	In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," to eliminate the diversity in practice and to increase the comparability of financial statements among companies. The guidance requires that a reporting entity generally must show an unrecognized tax benefit, or a portion of an unrecognized tax benefit, for a net operating loss, or NOL, carryforward, similar tax loss or tax credit carryforward as a reduction of a deferred tax asset. However, the entity should present the unrecognized tax benefit as a liability and not as a reduction of a deferred tax asset if the carryforward or tax loss is not available on the financial statement date to settle any additional income tax liability that would result from the disallowance of the tax position under the applicable tax law, or the applicable tax law does not require the company to use, and the company does not intend to use, the carryforward or tax loss to settle additional income taxes resulting from the disallowance of the tax position. The guidance does not require any new recurring disclosures because it does not affect the recognition or measurement of uncertain tax positions. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Early adoption and retrospective application are both permitted. Heartland does not expect the adoption of this standard to have a material impact on the results of operations, financial position, and liquidity.

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	Amounts used in the determination of basic and diluted earnings per share for the three month and nine month periods ended September 30, 2013 and 2012, are shown in the tables below:
		Three Months Ended
		September 30,
	(Dollars and number of shares in thousands, except per share data)	2013				2012
	Net income attributable to Heartland	$	6,810			$	13,587
	Preferred dividends and discount	(276		)		(949		)
	Net income available to common stockholders	$	6,534			$	12,638
	Weighted average common shares outstanding for basic earnings per share	16,936				16,474
	Assumed incremental common shares issued for common stock equivalents	285				272
	Weighted average common shares for diluted earnings per share	17,221				16,746
	Earnings per common share — basic	$	0.39			$	0.77
	Earnings per common share — diluted	$	0.38			$	0.75
	Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	105				446
		Nine Months Ended
		September 30,
	(Dollars and number of shares in thousands, except per share data)	2013				2012
	Net income attributable to Heartland	$	28,854			$	40,385
	Preferred dividends and discount	(889		)		(2,991		)
	Net income available to common stockholders	$	27,965			$	37,394
	Weighted average common shares outstanding for basic earnings per share	16,904				16,484
	Assumed incremental common shares issued for common stock equivalents	279				246
	Weighted average common shares for diluted earnings per share	17,183				16,730
	Earnings per common share — basic	$	1.65			$	2.27
	Earnings per common share — diluted	$	1.63			$	2.24
	Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	105				446
Schedule of Status of Stock Options	'
	A summary of the status of the stock options as of September 30, 2013 and 2012, and changes during the nine months ended September 30, 2013 and 2012, follows:
		2013							2012
		Shares			Weighted-Average Exercise Price				Shares		Weighted-Average Exercise Price
	Outstanding at January 1	377,907			$	22.62			570,762		$	21.06
	Granted	—			—				—		—
	Exercised	(68,586	)		19.54				(112,699	)	17.07
	Forfeited	(1,800	)		26.68				(12,334	)	23.68
	Outstanding at September 30	307,521			$	23.28			445,729		$	22
	Options exercisable at September 30	307,521			$	23.28			399,846		$	22.39

Securities_Tables

Securities (Tables)	9 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
Available-for-sale Securities	'
	The amortized cost, gross unrealized gains and losses, and estimated fair values of securities available for sale as of September 30, 2013, and December 31, 2012, are summarized in the table below, in thousands:
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair
					Gains			Losses				Value
	September 30, 2013
	U.S. government corporations and agencies	$	7,836		$	192		$	—			$	8,028
	Mortgage-backed securities	942,819			9,778			(19,450		)		933,147
	Obligations of states and political subdivisions	436,914			8,583			(16,662		)		428,835
	Total debt securities	1,387,569			18,553			(36,112		)		1,370,010
	Equity securities	21,537			63			—				21,600
	Total	$	1,409,106		$	18,616		$	(36,112	)		$	1,391,610
	December 31, 2012
	U.S. government corporations and agencies	$	21,002		$	443		$	(1	)		$	21,444
	Mortgage-backed securities	1,027,234			19,002			(10,035		)		1,036,201
	Obligations of states and political subdivisions	403,077			23,560			(192		)		426,445
	Total debt securities	1,451,313			43,005			(10,228		)		1,484,090
	Equity securities	21,252			733			—				21,985
	Total	$	1,472,565		$	43,738		$	(10,228	)		$	1,506,075
Held-to-maturity Securities	'
	The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of September 30, 2013, and December 31, 2012, are summarized in the table below, in thousands:
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair
					Gains			Losses				Value
	September 30, 2013
	Mortgage-backed securities	$	6,045		$	290		$	(238	)		$	6,097
	Obligations of states and political subdivisions	47,796			—			—				47,796
	Total	$	53,841		$	290		$	(238	)		$	53,893
	December 31, 2012
	Mortgage-backed securities	$	7,040		$	492		$	(12	)		$	7,520
	Obligations of states and political subdivisions	48,462			—			—				48,462
	Total	$	55,502		$	492		$	(12	)		$	55,982
Investments Classified by Contractual Maturity Date	'
	The amortized cost and estimated fair value of debt securities available for sale at September 30, 2013, by contractual maturity are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties.
		Amortized Cost			Estimated Fair Value
	Due in 1 year or less	$	7,737		$	7,808
	Due in 1 to 5 years	38,189			39,952
	Due in 5 to 10 years	47,239			48,207
	Due after 10 years	351,585			340,896
	Total debt securities	444,750			436,863
	Mortgage-backed securities	942,819			933,147
	Equity securities	21,537			21,600
	Total investment securities	$	1,409,106		$	1,391,610
	The amortized cost and estimated fair value of debt securities held to maturity at September 30, 2013, by contractual maturity are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties.
		Amortized Cost			Estimated Fair Value
	Due in 1 year or less	$	—		$	—
	Due in 1 to 5 years	1,281			1,281
	Due in 5 to 10 years	10,200			10,200
	Due after 10 years	36,315			36,315
	Total debt securities	47,796			47,796
	Mortgage-backed securities	6,045			6,097
	Total investment securities	$	53,841		$	53,893
Schedule of Realized Gain (Loss)	'
	Gross gains and losses realized related to the sales of securities for the three and nine month periods ended September 30, are summarized as follows, in thousands:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Proceeds from sales	$	130,031		$	147,199		347,170			$	488,350
	Gross security gains	1,420			5,212			7,703			14,592
	Gross security losses	302			—			1,091			486
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	'
	The following tables summarize, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in Heartland's securities portfolio as of September 30, 2013, and December 31, 2012. The investments were segregated into two categories: those that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months. The reference point for determining how long an investment was in an unrealized loss position was September 30, 2012, and December 31, 2011, respectively. Securities for which Heartland has taken credit-related OTTI write-downs are categorized as being "less than 12 months" or "12 months or longer" in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down.
	Securities available for sale	Less than 12 months						12 months or longer							Total
		Fair Value			Unrealized			Fair Value				Unrealized			Fair Value		Unrealized
					Losses							Losses					Losses
	September 30, 2013
	U.S. government corporations and agencies	$	—		$	—		$	—			$	—		$	—	$	—
	Mortgage-backed securities	679,247			(18,529		)	30,886				(921		)	710,133		(19,450		)
	Obligations of states and political subdivisions	255,451			(16,662		)	—				—			255,451		(16,662		)
	Total temporarily impaired securities	$	934,698		$	(35,191	)	$	30,886			$	(921	)	$	965,584	$	(36,112	)
	December 31, 2012
	U.S. government corporations and agencies	$	1,517		$	(1	)	$	—			$	—		$	1,517	$	(1	)
	Mortgage-backed securities	332,842			(9,121		)	24,489				(914		)	357,331		(10,035		)
	Obligations of states and political subdivisions	22,503			(192		)	—				—			22,503		(192		)
	Total temporarily impaired securities	$	356,862		$	(9,314	)	$	24,489			$	(914	)	$	381,351	$	(10,228	)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	'
	Securities held to maturity	Less than 12 months						12 months or longer							Total
		Fair Value			Unrealized			Fair Value				Unrealized			Fair Value		Unrealized
					Losses							Losses					Losses
	September 30, 2013
	Mortgage-backed securities	$	—		$	—		$	3,082			$	(238	)	$	3,082	$	(238	)
	Obligations of states and political subdivisions	—			—			—				—			—		—
	Total temporarily impaired securities	$	—		$	—		$	3,082			$	(238	)	$	3,082	$	(238	)
	December 31, 2012
	Mortgage-backed securities	$	—		$	—		$	3,296			$	(12	)	$	3,296	$	(12	)
	Obligations of states and political subdivisions	—			—			—				—			—		—
	Total temporarily impaired securities	$	—		$	—		$	3,296			$	(12	)	$	3,296	$	(12	)
Other than Temporary Impairment, Credit Losses Recognized in Earnings	'
	The following table shows the detail of total OTTI write-downs included in earnings, in thousands:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013				2012
	Available for sale debt securities:
	Mortgage backed securities	$	—		$	—		$	—			$	184
	Held to maturity debt securities:
	Mortgage backed securities	—			—			—				797
	Total debt security OTTI write-downs included in earnings	$	—		$	—		$	—			$	981
	The following table shows the detail of OTTI write-downs on debt securities included in earnings and the related changes in other accumulated comprehensive income ("AOCI") for the same securities, in thousands:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013				2012
	Recorded as part of gross realized losses:
	Credit related OTTI	$	—		$	—		$	—			$	981
	Intent to sell OTTI	—			—			—				—
	Total recorded as part of gross realized losses	—			—			—				981
	Recorded directly to AOCI for non-credit related impairment:
	Residential mortgage backed securities	—			—			—				683
	Accretion of non-credit related impairment	(24		)	(24		)	(72		)		(47		)
	Total changes to AOCI for non-credit related impairment	(24		)	(24		)	(72		)		636
	Total OTTI losses (accretion) recorded on debt securities, net	$	(24	)	$	(24	)	$	(72	)		$	1,617

Loans_and_Leases_Tables

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans and Leases	'
	Loans and leases as of September 30, 2013, and December 31, 2012, were as follows, in thousands:
		September 30, 2013				December 31, 2012
	Loans and leases receivable held to maturity:
	Commercial	$	755,658			$	712,308
	Commercial real estate	1,287,337				1,289,184
	Agricultural and agricultural real estate	324,339				328,311
	Residential real estate	269,501				249,689
	Consumer	268,112				245,678
	Gross loans and leases receivable held to maturity	2,904,947				2,825,170
	Unearned discount	(232		)		(676		)
	Deferred loan fees	(3,009		)		(2,945		)
	Total net loans and leases receivable held to maturity	2,901,706				2,821,549
	Loans covered under loss share agreements:
	Commercial and commercial real estate	2,402				3,074
	Agricultural and agricultural real estate	446				748
	Residential real estate	2,433				2,645
	Consumer	595				786
	Total loans covered under loss share agreements	5,876				7,253
	Allowance for loan and lease losses	(41,311		)		(38,715		)
	Loans and leases receivable, net	$	2,866,271			$	2,790,087
Allowance for Loan and Lease Losses, Based on Impairment Methodology	'
	All other loans are collectively evaluated for impairment under ASC 450-20. Heartland has made no significant changes to the accounting for the allowance for loan and lease losses policy during 2013.
		Allowance For Loan and Lease Losses												Gross Loans and Leases Receivable Held to Maturity
		Ending Balance				Ending Balance Under ASC				Total				Ending Balance Evaluated for Impairment Under ASC				Ending Balance Evaluated for Impairment Under ASC				Total
		Under ASC				450-20								310-10-35				450-20
		310-10-35
	September 30, 2013
	Commercial	$	3,178			$	9,918			$	13,096			$	21,696			$	733,962			$	755,658
	Commercial real estate	838				13,205				14,043				28,018				1,259,319				1,287,337
	Agricultural and agricultural real estate	619				2,197				2,816				19,249				305,090				324,339
	Residential real estate	678				2,859				3,537				6,986				262,515				269,501
	Consumer	1,828				5,991				7,819				5,185				262,927				268,112
	Total	$	7,141			$	34,170			$	41,311			$	81,134			$	2,823,813			$	2,904,947
	December 31, 2012
	Commercial	$	1,350			$	10,038			$	11,388			$	9,031			$	703,277			$	712,308
	Commercial real estate	1,112				13,361				14,473				45,583				1,243,601				1,289,184
	Agricultural and agricultural real estate	109				2,029				2,138				16,128				312,183				328,311
	Residential real estate	783				2,760				3,543				7,443				242,246				249,689
	Consumer	1,270				5,903				7,173				5,391				240,287				245,678
	Total	$	4,624			$	34,091			$	38,715			$	83,576			$	2,741,594			$	2,825,170
Schedule of Financing Receivables, Non Accrual Status	'
	The following table presents nonaccrual loans, accruing loans past due 90 days or more and troubled debt restructured loans not covered under loss share agreements at September 30, 2013, and December 31, 2012, in thousands. There were no nonaccrual leases, accruing leases past due 90 days or more or restructured leases at September 30, 2013, and December 31, 2012.
		September 30, 2013				31-Dec-12
	Nonaccrual loans	$	28,339			$	38,675
	Nonaccrual troubled debt restructured loans	18,749				4,481
	Total nonaccrual loans	$	47,088			$	43,156
	Accruing loans past due 90 days or more	—				—
	Performing troubled debt restructured loans	$	19,371			$	21,121
Troubled Debt Restructurings on Financing Receivables	'
	The following tables provide information on troubled debt restructured loans that were modified during the three months and nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Three Months Ended
		September 30,
		2013											2012
		Number			Pre-				Post-				Number			Pre-				Post-
		of Loans			Modification				Modification				of Loans			Modification				Modification
					Recorded				Recorded							Recorded				Recorded
					Investment				Investment							Investment				Investment
	Commercial	—			$	—			$	—			—			$	—			$	—
	Commercial real estate	—			—				—				—			—				—
	Total commercial and commercial real estate	—			—				—				—			—				—
	Agricultural and agricultural real estate	—			—				—				—			—				—
	Residential real estate	1			65				65				1			87				87
	Consumer	—			—				—				—			—				—
	Total	1			$	65			$	65			1			$	87			$	87
		Nine Months Ended
		September 30,
		2013											2012
		Number			Pre-				Post-				Number			Pre-				Post-
		of Loans			Modification				Modification				of Loans			Modification				Modification
					Recorded				Recorded							Recorded				Recorded
					Investment				Investment							Investment				Investment
	Commercial	3			$	17,873			$	17,873			—			$	—			$	—
	Commercial real estate	—			—				—				2			1,396				1,396
	Total commercial and commercial real estate	3			17,873				17,873				2			1,396				1,396
	Agricultural and agricultural real estate	3			2,576				2,576				2			276				276
	Residential real estate	4			762				762				1			87				87
	Consumer	1			166				166				1			1,152				1,152
	Total	11			$	21,377			$	21,377			6			$	2,911			$	2,911
Troubled Debt Restructed Loans with Payment Default	'
	The following tables provide information on troubled debt restructured loans for which there was a payment default during the three months and nine months ended September 30, 2013, and September 30, 2012, in thousands, that had been modified during the twelve-month period prior to the default:
		With Payment Defaults During the Following Periods
		Three Months Ended
		September 30,
		2013							2012
		Number of			Recorded				Number of			Recorded
		Loans			Investment				Loans			Investment
	Commercial	1			$	13,000			—			$	—
	Commercial real estate	—			—				1			1,380
	Total commercial and commercial real estate	1			13,000				1			1,380
	Agricultural and agricultural real estate	—			—				—			—
	Residential real estate	—			—				2			59
	Consumer	—			—				—			—
	Total	1			$	13,000			3			$	1,439
		With Payment Defaults During the Following Periods
		Nine Months Ended
		September 30,
		2013							2012
		Number of			Recorded				Number of			Recorded
		Loans			Investment				Loans			Investment
	Commercial	2			$	17,670			—			$	—
	Commercial real estate	—			—				1			1,380
	Total commercial and commercial real estate	2			17,670				1			1,380
	Agricultural and agricultural real estate	—			—				—			—
	Residential real estate	2			167				2			59
	Consumer	—			—				—			—
	Total	4			$	17,837			3			$	1,439
Financing Receivable Credit Quality Indicators	'
	The following table presents loans and leases not covered by loss share agreements by credit quality indicator at September 30, 2013, and December 31, 2012, in thousands:
		Pass				Nonpass				Total
	September 30, 2013
	Commercial	$	695,073			$	60,585			$	755,658
	Commercial real estate	1,159,006				128,331				1,287,337
	Total commercial and commercial real estate	1,854,079				188,916				2,042,995
	Agricultural and agricultural real estate	280,501				43,838				324,339
	Residential real estate	253,502				15,999				269,501
	Consumer	257,682				10,430				268,112
	Total gross loans and leases receivable held to maturity	$	2,645,764			$	259,183			$	2,904,947
	December 31, 2012
	Commercial	$	661,118			$	51,190			$	712,308
	Commercial real estate	1,134,784				154,400				1,289,184
	Total commercial and commercial real estate	1,795,902				205,590				2,001,492
	Agricultural and agricultural real estate	286,264				42,047				328,311
	Residential real estate	227,925				21,764				249,689
	Consumer	235,232				10,446				245,678
	Total gross loans and leases receivable held to maturity	$	2,545,323			$	279,847			$	2,825,170
Past Due Financing Receivables	'
	The following table sets forth information regarding Heartland's accruing and nonaccrual loans and leases not covered by loss share agreements at September 30, 2013, and December 31, 2012, in thousands:
		Accruing Loans and Leases
		30-59 Days				60-89 Days				90 Days				Total				Current				Nonaccrual		Total Loans and Leases
		Past Due				Past Due				or More				Past Due
										Past Due
	September 30, 2013
	Commercial	$	3,537			$	76			$	—			$	3,613			$	733,222			$	18,823	$	755,658
	Commercial real estate	2,611				495				—				3,106				1,270,831				13,400		1,287,337
	Total commercial and commercial real estate	6,148				571				—				6,719				2,004,053				32,223		2,042,995
	Agricultural and agricultural real estate	9,021				132				—				9,153				309,128				6,058		324,339
	Residential real estate	236				—				—				236				263,620				5,645		269,501
	Consumer	3,282				797				—				4,079				260,871				3,162		268,112
	Total gross loans and leases receivable held to maturity	$	18,687			$	1,500			$	—			$	20,187			$	2,837,672			$	47,088	$	2,904,947
	December 31, 2012
	Commercial	$	1,143			$	525			$	—			$	1,668			$	708,459			$	2,181	$	712,308
	Commercial real estate	1,631				494				—				2,125				1,259,112				27,947		1,289,184
	Total commercial and commercial real estate	2,774				1,019				—				3,793				1,967,571				30,128		2,001,492
	Agricultural and agricultural real estate	687				—				—				687				324,545				3,079		328,311
	Residential real estate	1,278				234				—				1,512				241,860				6,317		249,689
	Consumer	2,434				803				—				3,237				238,809				3,632		245,678
	Total gross loans and leases receivable held to maturity	$	7,173			$	2,056			$	—			$	9,229			$	2,772,785			$	43,156	$	2,825,170
Allowance for Credit Losses on Financing Receivables	'
	The following tables present, for impaired loans not covered by loss share agreements and by category of loan, the unpaid contractual balance at September 30, 2013, and December 31, 2012; the outstanding loan balance recorded on the consolidated balance sheets at September 30, 2013, and December 31, 2012; any related allowance recorded for those loans as of September 30, 2013, and December 31, 2012; the average outstanding loan balance recorded on the consolidated balance sheets during the three months and nine months ended September 30, 2013, and year ended December 31, 2012; and the interest income recognized on the impaired loans during the three months and nine months ended September 30, 2013, and year ended December 31, 2012, in thousands:
		Unpaid				Loan				Related				Quarter-to-				Quarter-to-				Year-to-		Year-to-
		Contractual				Balance				Allowance				Date				Date				Date		Date
		Balance								Recorded				Avg. Loan				Interest				Avg.		Interest
														Balance				Income				Loan		Income
																		Recognized				Balance		Recognized
	September 30, 2013
	Impaired loans with a related allowance:
	Commercial	$	15,026			$	15,026			$	3,178			$	5,892			$	21			$	3,560	$	51
	Commercial real estate	7,223				7,027				838				8,494				81				7,625		250
	Total commercial and commercial real estate	22,249				22,053				4,016				14,386				102				11,185		301
	Agricultural and agricultural real estate	7,363				7,363				619				12,965				22				6,885		65
	Residential real estate	2,746				2,736				678				3,187				3				3,330		13
	Consumer	3,706				3,706				1,828				3,591				32				3,483		82
	Total loans held to maturity	$	36,064			$	35,858			$	7,141			$	34,129			$	159			$	24,883	$	461
	Impaired loans without a related allowance:
	Commercial	$	7,512			$	6,670			$	—			$	14,980			$	44			$	10,242	$	56
	Commercial real estate	26,390				20,991				—				19,507				171				26,630		284
	Total commercial and commercial real estate	33,902				27,661				—				34,487				215				36,872		340
	Agricultural and agricultural real estate	11,886				11,886				—				6,691				125				10,828		370
	Residential real estate	4,782				4,250				—				4,463				23				4,102		62
	Consumer	1,494				1,479				—				1,501				9				1,505		24
	Total loans held to maturity	$	52,064			$	45,276			$	—			$	47,142			$	372			$	53,307	$	796
	Total impaired loans held to maturity:
	Commercial	$	22,538			$	21,696			$	3,178			$	20,872			$	65			$	13,802	$	107
	Commercial real estate	33,613				28,018				838				28,001				252				34,255		534
	Total commercial and commercial real estate	56,151				49,714				4,016				48,873				317				48,057		641
	Agricultural and agricultural real estate	19,249				19,249				619				19,656				147				17,713		435
	Residential real estate	7,528				6,986				678				7,650				26				7,432		75
	Consumer	5,200				5,185				1,828				5,092				41				4,988		106
	Total impaired loans held to maturity	$	88,128			$	81,134			$	7,141			$	81,271			$	531			$	78,190	$	1,257
		Unpaid				Loan				Related				Year-to-				Year-to-
		Contractual				Balance				Allowance				Date				Date
		Balance								Recorded				Avg.				Interest
														Loan				Income
														Balance				Recognized
	December 31, 2012
	Impaired loans with a related allowance:
	Commercial	$	2,904			$	2,904			$	1,350			$	5,082			$	88
	Commercial real estate	6,403				6,384				1,112				12,671				813
	Total commercial and commercial real estate	9,307				9,288				2,462				17,753				901
	Agricultural and agricultural real estate	1,493				1,493				109				379				83
	Residential real estate	3,197				3,170				783				2,737				89
	Consumer	3,876				3,836				1,270				3,781				204
	Total loans held to maturity	$	17,873			$	17,787			$	4,624			$	24,650			$	1,277
	Impaired loans without a related allowance:
	Commercial	$	6,596			$	6,127			$	—			$	3,813			$	186
	Commercial real estate	48,967				39,199				—				41,814				689
	Total commercial and commercial real estate	55,563				45,326				—				45,627				875
	Agricultural and agricultural real estate	14,654				14,635				—				13,728				539
	Residential real estate	4,741				4,273				—				3,861				65
	Consumer	1,708				1,555				—				1,630				18
	Total loans held to maturity	$	76,666			$	65,789			$	—			$	64,846			$	1,497
	Total impaired loans held to maturity:
	Commercial	$	9,500			$	9,031			$	1,350			$	8,895			$	274
	Commercial real estate	55,370				45,583				1,112				54,485				1,502
	Total commercial and commercial real estate	64,870				54,614				2,462				63,380				1,776
	Agricultural and agricultural real estate	16,147				16,128				109				14,107				622
	Residential real estate	7,938				7,443				783				6,598				154
	Consumer	5,584				5,391				1,270				5,411				222
	Total impaired loans held to maturity	$	94,539			$	83,576			$	4,624			$	89,496			$	2,774
Impaired Financing Receivables	'
	The carrying amount of the loans covered by these loss share agreements at September 30, 2013, and December 31, 2012, consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands:
		September 30, 2013												December 31, 2012
		Impaired				Non				Total				Impaired				Non				Total
		Purchased				Impaired				Covered				Purchased				Impaired				Covered
		Loans				Purchased				Loans				Loans				Purchased				Loans
						Loans												Loans
	Commercial and commercial real estate	$	530			$	1,872			$	2,402			$	598			$	2,476			$	3,074
	Agricultural and agricultural real estate	—				446				446				—				748				748
	Residential real estate	—				2,433				2,433				—				2,645				2,645
	Consumer loans	500				95				595				89				697				786
	Total Covered Loans	$	1,030			$	4,846			$	5,876			$	687			$	6,566			$	7,253

Allowance_for_Loan_and_Lease_L1

Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2013
Allowance for Loan and Lease Losses [Abstract]	'
Allowance for Credit Losses on Financing Receivables	'
	Changes in the allowance for loan and lease losses for the three months and nine months ended September 30, 2013, and September 30, 2012, were as follows, in thousands:
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	9,436		$	13,671		$	3,055		$	3,580		$	7,881		$	—		$	—	$	37,623
	30-Jun-13
	Charge-offs	(163		)	(630		)	—			(450		)	(1,270		)	—			—		(2,513		)
	Recoveries	78			514			1			76			383			—			—		1,052
	Provision	3,745			488			(240		)	331			825			—			—		5,149
	Balance at	$	13,096		$	14,043		$	2,816		$	3,537		$	7,819		$	—		$	—	$	41,311
	30-Sep-13
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	11,388		$	14,473		$	2,138		$	3,543		$	7,173		$	—		$	—	$	38,715
	31-Dec-12
	Charge-offs	(1,422		)	(2,561		)	(23		)	(856		)	(3,488		)	—			—		(8,350		)
	Recoveries	983			1,279			100			102			834			—			—		3,298
	Provision	2,147			852			601			748			3,300			—			—		7,648
	Balance at	$	13,096		$	14,043		$	2,816		$	3,537		$	7,819		$	—		$	—	$	41,311
	30-Sep-13
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	10,287		$	17,057		$	2,002		$	3,899		$	8,193		$	1		$	—	$	41,439
	30-Jun-12
	Charge-offs	(107		)	(1,668		)	(1		)	(100		)	(1,174		)	—			—		(3,050		)
	Recoveries	1,550			717			1			95			151			—			—		2,514
	Provision	(462		)	(806		)	55			(26		)	738			(1		)	—		(502		)
	Balance at	$	11,268		$	15,300		$	2,057		$	3,868		$	7,908		$	—		$	—	$	40,401
	30-Sep-12
		Commercial			Commercial			Agricultural			Residential			Consumer			Leases			Unallocated		Total
					Real Estate						Real Estate
	Balance at	$	10,547		$	14,621		$	1,763		$	3,001		$	6,874		$	2		$	—	$	36,808
	31-Dec-11
	Charge-offs	(814		)	(2,762		)	(1		)	(376		)	(2,959		)	—			—		(6,912		)
	Recoveries	1,799			2,996			82			161			615			—			—		5,653
	Provision	(264		)	445			213			1,082			3,378			(2		)	—		4,852
	Balance at	$	11,268		$	15,300		$	2,057		$	3,868		$	7,908		$	—		$	—	$	40,401
	30-Sep-12

Goodwill_Core_Deposit_Premium_1

Goodwill, Core Deposit Premium and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	'
	The gross carrying amount of other intangible assets and the associated accumulated amortization at September 30, 2013, and December 31, 2012, are presented in the table below, in thousands:
		September 30, 2013								December 31, 2012
		Gross			Accumulated			Net		Gross		Accumulated		Net
		Carrying			Amortization			Carrying		Carrying		Amortization		Carrying
		Amount						Amount		Amount				Amount
	Amortizing intangible assets:
	Core deposit intangibles	$	11,668		$	9,887		$	1,781	$	11,668	$	9,327	$	2,341
	Mortgage servicing rights	31,095			9,899			21,196		22,892		7,239		15,653
	Customer relationship intangible	1,177			719			458		1,177		685		492
	Total	$	43,940		$	20,505		$	23,435	$	35,737	$	17,251	$	18,486
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	'
	The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands:
		Core			Mortgage			Customer
		Deposit			Servicing			Relationship
		Intangibles			Rights			Intangible		Total
	Three months ending December 31, 2013	$	181		$	1,575		$	11	$	1,767
	Year ending December 31,
	2014	468			6,540			43		7,051
	2015	267			5,232			42		5,541
	2016	238			3,924			41		4,203
	2017	212			2,616			40		2,868
	2018	187			1,309			39		1,535
	Thereafter	228			—			242		470
Schedule of Servicing Assets at Fair Value	'
	The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights:
		2013			2012
	Balance at January 1	$	15,653		$	11,276
	Originations	10,595			7,916
	Amortization	(5,548		)	(4,727		)
	Valuation adjustment	496			(674		)
	Balance at September 30	$	21,196		$	13,791

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	'
	The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at September 30, 2013, and December 31, 2012, in thousands:
		Notional				Fair				Balance	Receive			Weighted		Maturity
		Amount				Value				Sheet	Rate			Average
										Category				Pay Rate
	September 30, 2013
	Interest rate swap	$	12,046			$	(509	)		Other Liabilities	2.93	%		5.14	%	4/20/16
	Interest rate swap	25,000				(289		)		Other Liabilities	0.254	%		2.58	%	3/17/14
	Interest rate swap	20,000				(1,637		)		Other Liabilities	0.26	%		3.22	%	3/1/17
	Interest rate swap	20,000				(1,905		)		Other Liabilities	0.271	%		3.355	%	1/7/20
	December 31, 2012
	Interest rate swap	$	13,002			$	(711	)		Other Liabilities	2.961	%		5.14	%	4/20/16
	Interest rate swap	25,000				(708		)		Other Liabilities	0.308	%		2.58	%	3/17/14
	Interest rate swap	20,000				(2,186		)		Other Liabilities	0.311	%		3.22	%	3/1/17
	Interest rate swap	20,000				(3,020		)		Other Liabilities	0.351	%		3.355	%	1/7/20
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	'
	The table below identifies the gains and losses recognized on Heartland's derivative instruments designated as cash flow hedges for the nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Effective Portion									Ineffective Portion
		Recognized in OCI				Reclassified from AOCI into Income					Recognized in Income on Derivatives
		Amount of Gain (Loss)				Category		Amount of Gain (Loss)			Category		Amount of Gain (Loss)
	September 30, 2013
	Interest rate swap	$	203			Interest Expense		$	(210	)	Other Income		$	—
	Interest rate swap	419				Interest Expense		(436		)	Other Income		—
	Interest rate swap	548				Interest Expense		(446		)	Other Income		—
	Interest rate swap	1,115				Interest Expense		(460		)	Other Income		—
	September 30, 2012
	Interest rate swap	$	(58	)		Interest Expense		$	(226	)	Other Income		$	—
	Interest rate swap	189				Interest Expense		(397		)	Other Income		—
	Interest rate swap	(262		)		Interest Expense		(421		)	Other Income		—
	Interest rate swap	(606		)		Interest Expense		(442		)	Other Income		—
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location	'
	The table below identifies the balance sheet category and fair values of Heartland's derivative instruments not designated as hedging instruments at September 30, 2013, and December 31, 2012, in thousands:
		Balance Sheet Category		Notional				Fair
				Amount				Value
	September 30, 2013
	Interest rate lock commitments (mortgage)	Other Assets		$	104,098			$	4,601
	Forward commitments	Other Assets		69,100				1,271
	Forward commitments	Other Liabilities		185,942				(3,320		)
	December 31, 2012
	Interest rate lock commitments (mortgage)	Other Assets		$	267,397			$	9,353
	Forward commitments	Other Assets		168,910				462
	Forward commitments	Other Liabilities		351,996				(1,221		)
	The table below identifies the income statement category of the gains and losses recognized in income on Heartland's derivative instruments not designated as hedging instruments for the nine months ended September 30, 2013, and September 30, 2012, in thousands:
		Income Statement Category		Year-to-Date
				Gain (Loss) Recognized
	September 30, 2013
	Interest rate lock commitments (mortgage)	Gains on sale of loans held for sale		$	(6,047	)
	Forward commitments	Gains on sale of loans held for sale		(1,289		)
	September 30, 2012
	Interest rate lock commitments (mortgage)	Gains on sale of loans held for sale		$	12,759
	Forward commitments	Gains on sale of loans held for sale		(3,870		)

Fair_Value_Assets_and_liabilit

Fair Value (Assets and liabilities, fair value, recurring basis) (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	The table below presents Heartland's assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2013, and December 31, 2012, in thousands, aggregated by the level in the fair value hierarchy within which those measurements fall:
		Total Fair Value			Level 1			Level 2		Level 3
	September 30, 2013
	Trading securities	$	1,219		$	1,219		$	—	$	—
	Securities available for sale	1,391,610			8,028			1,378,625		4,957
	Derivative assets	5,872			—			5,872		—
	Total assets at fair value	$	1,398,701		$	9,247		$	1,384,497	$	4,957
	Derivative liabilities	$	7,660		$	—		$	7,660	$	—
	Total liabilities at fair value	$	7,660		$	—		$	7,660	$	—
	December 31, 2012
	Trading securities	$	380		$	380		$	—	$	—
	Securities available for sale	1,506,075			12,811			1,488,924		4,340
	Derivative assets	9,815			—			9,815		—
	Total assets at fair value	$	1,516,270		$	13,191		$	1,498,739	$	4,340
	Derivative liabilities	$	7,846		$	—		$	7,846	$	—
	Total liabilities at fair value	$	7,846		$	—		$	7,846	$	—
Fair Value Measurements, Nonrecurring	'
	The tables below present Heartland's assets that are measured at fair value on a nonrecurring basis, in thousands:
		Fair Value Measurements at September 30, 2013
		Total			Quoted Prices in			Significant Other		Significant		Losses
					Active Markets for			Observable		Unobservable
					Identical Assets			Inputs		Inputs
					(Level 1)			(Level 2)		(Level 3)
	Collateral dependent impaired loans:
	Commercial	$	12,455		$	—		$	—	$	12,455	$	472
	Commercial real estate	8,004			—			—		8,004		1,374
	Agricultural and agricultural real estate	6,749			—			—		6,749		—
	Residential real estate	3,284			—			—		3,284		—
	Consumer	1,936			—			—		1,936		14
	Total collateral dependent impaired loans	$	32,428		$	—		$	—	$	32,428	$	1,860
	Other real estate owned	$	33,018		$	—		$	—	$	33,018	$	2,440
		Fair Value Measurements at December 31, 2012
		Total			Quoted Prices in			Significant Other		Significant		Losses
					Active Markets for			Observable		Unobservable
					Identical Assets			Inputs		Inputs
					(Level 1)			(Level 2)		(Level 3)
	Collateral dependent impaired loans
	Commercial	$	7,681		$	—		$	—	$	7,681	$	1,799
	Commercial real estate	44,471			—			—		44,471		6,898
	Agricultural and agricultural real estate	16,019			—			—		16,019		1
	Residential real estate	6,660			—			—		6,660		988
	Consumer	4,121			—			—		4,121		4,818
	Total collateral dependent impaired loans	$	78,952		$	—		$	—	$	78,952	$	14,504
	Other real estate owned	$	35,822		$	—		$	—	$	35,822	$	6,953
	Mortgage servicing rights	$	15,956		$	—		$	—	$	15,956	$	477
Fair Value Inputs, Liabilities, Quantitative Information	'
	The following tables present additional quantitative information about assets measured at fair value and for which Heartland has utilized Level 3 inputs to determine fair value, in thousands:
		Quantitative Information About Level 3 Fair Value Measurements
		Fair Value			Valuation		Unobservable	Range
		at 9/30/13			Technique		Input	(Weighted Average)
	z-TRANCHE Securities	$	4,957		Discounted cash flows		Pretax discount rate	7.00 - 9.00%
							Actual defaults	12.71-20.14% (15.52%)
							Actual deferrals	6.25-22.35% (11.32%)
	Collateral dependent impaired loans:
	Commercial	12,455			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Commercial real estate	8,004			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Agricultural and agricultural real estate	6,749			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Residential real estate	3,284			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Consumer	1,936			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Other real estate owned	33,018			Modified appraised value		Third party appraisal	NM*
							Appraisal discount
	* Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.
		Quantitative Information About Level 3 Fair Value Measurements
		Fair Value			Valuation		Unobservable	Range
		at 12/31/12			Technique		Input	(Weighted Average)
	z-TRANCHE Securities	$	4,340		Discounted cash flows		Pretax discount rate	8.00 - 10.00%
							Actual defaults	13.94-20.94% (15.52%)
							Actual deferrals	6.30-23.71% (11.32%)
	Collateral dependent impaired loans:
	Commercial	7,681			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Commercial real estate	44,471			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Agricultural and agricultural real estate	16,019			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Residential real estate	6,660			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Consumer	4,121			Modified appraised value		Third party appraisal	NM*
							Appraisal discount	NM*
	Other real estate owned	35,822			Modified appraised value		Third party appraisal	NM*
							Appraisal discount
	Mortgage servicing rights	15,956			Discounted cash flows		Prepayment speeds, servicing costs and escrow analysis	Average CPR Life
								12.99 - 18.71%
								-18.05%
	* Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	'
	The changes in fair value of Level 3 assets that are measured on a recurring basis are summarized in the following table, in thousands:
		For the Nine Months Ended			For the Year Ended
		September 30, 2013			December 31, 2012
	Balance at January 1,	$	4,340		$	3,243
	Total gains (losses):
	Included in earnings	642			—
	Included in other comprehensive income	794			938
	Purchases, issuances, sales and settlements:
	Purchases	—			195
	Sales	(651		)	—
	Settlements	(168		)	(36		)
	Balance at period end	$	4,957		$	4,340
Fair Value, by Balance Sheet Grouping	'
	The following analysis, which is inherently limited in depicting fair value, also does not consider any value associated with either existing customer relationships or the ability of Heartland to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.
								Fair Value Measurements at
								30-Sep-13
		Carrying			Estimated			Quoted Prices in		Significant Other		Significant
		Amount			Fair			Active Markets for		Observable		Unobservable
					Value			Identical Assets		Inputs		Inputs
								(Level 1)		(Level 2)		(Level 3)
	Financial assets:
	Cash and cash equivalents	$	165,008		$	165,008		$	165,008	$	—	$	—
	Time deposits in other financial institutions	3,605			3,605			3,605		—		—
	Securities:
	Trading	1,219			1,219			1,219		—		—
	Available for sale	1,391,610			1,391,610			8,028		1,378,625		4,957
	Held to maturity	53,841			53,893			—		53,893		—
	Total securities	1,446,670			1,446,722			9,247		1,432,518		4,957
	Loans held for sale	61,326			61,640			—		61,640		—
	Loans, net:
	Commercial	741,728			735,522			—		723,067		12,455
	Commercial real estate	1,274,043			1,276,194			—		1,268,190		8,004
	Agricultural and agricultural real estate	322,502			323,236			—		316,487		6,749
	Residential real estate	267,341			259,334			—		256,050		3,284
	Consumer	260,657			263,888			—		261,952		1,936
	Total Loans, net	2,866,271			2,858,174			—		2,825,746		32,428
	Derivatives	5,872			5,872			—		5,872		—
	Financial liabilities:
	Deposits
	Demand deposits	1,073,688			1,073,688			—		1,073,688		—
	Savings deposits	2,043,397			2,043,397			—		2,043,397		—
	Time deposits	807,913			807,913			—		807,913		—
	Short term borrowings	224,048			224,048			—		224,048		—
	Other borrowings	322,538			321,074			—		321,074		—
	Derivatives	7,660			7,660			—		7,660		—
								Fair Value Measurements at
								31-Dec-12
		Carrying			Estimated			Quoted Prices in		Significant Other		Significant
		Amount			Fair			Active Markets for		Observable		Unobservable
					Value			Identical Assets		Inputs		Inputs
								(Level 1)		(Level 2)		(Level 3)
	Financial assets:
	Cash and cash equivalents	$	168,054		$	168,054		$	168,054	$	—	$	—
	Securities:
	Trading	380			380			380		—		—
	Available for sale	1,506,075			1,506,075			12,811		1,488,924		4,340
	Held to maturity	55,502			55,982			—		55,982		—
	Total securities	1,561,957			1,562,437			13,191		1,544,906		4,340
	Loans held for sale	96,165			96,165			—		96,165		—
	Loans, net:
	Commercial	700,225			691,605			—		683,924		7,681
	Commercial real estate	1,275,770			1,281,031			—		1,236,560		44,471
	Agricultural and agricultural real estate	326,867			329,443			—		313,424		16,019
	Residential real estate	248,608			237,050			—		230,390		6,660
	Consumer	238,617			241,978			—		237,857		4,121
	Total Loans, net	2,790,087			2,781,107			—		2,702,155		78,952
	Mortgage derivatives	9,815			9,815			—		9,815		—
	Financial liabilities:
	Deposits
	Demand deposits	974,232			974,232			—		974,232		—
	Savings deposits	2,004,438			2,004,438			—		2,004,438		—
	Time deposits	866,990			866,990			—		866,990		—
	Short term borrowings	224,626			224,626			—		224,626		—
	Other borrowings	389,025			376,422			—		376,422		—
	Derivatives	7,846			7,846			—		7,846		—

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Mortgage Banking [Abstract]	'
Schedule of Segment Reporting	'
	The following tables present financial information from Heartland's operating segments for the three-month and nine-month periods ended September 30, 2013, and 2012, in thousands.
		Three Months Ended
		September 30,
		2013							2012
		Community		Retail			Total		Community			Retail		Total
		and Other		Mortgage					and Other			Mortgage
		Banking		Banking					Banking			Banking
	Net interest income	$	39,291	$	589		$	39,880	$	36,412		$	400	$	36,812
	Provision for loan losses	5,149		—			5,149		(502		)	—		(502		)
	Total noninterest income	12,309		8,409			20,718		13,988			15,778		29,766
	Total noninterest expense	36,813		10,334			47,147		35,597			11,562		47,159
	Income (loss) before taxes	$	9,638	$	(1,336	)	$	8,302	$	15,305		$	4,616	$	19,921
	Segment Assets	$	4,825,781	$	86,949		$	4,912,730	$	4,467,574		$	125,623	$	4,593,197
	Average Loans	$	2,867,933	$	69,575		$	2,937,508	$	2,628,811		$	98,995	$	2,727,806
		Nine Months Ended
		September 30,
		2013							2012
		Community		Retail			Total		Community			Retail		Total
		and Other		Mortgage					and Other			Mortgage
		Banking		Banking					Banking			Banking
	Net interest income	$	115,968	$	1,503		$	117,471	$	110,332		$	1,850	$	112,182
	Provision for loan losses	7,648		—			7,648		4,852			—		4,852
	Total noninterest income	37,630		34,414			72,044		40,902			40,530		81,432
	Total noninterest expense	108,877		33,783			142,660		99,902			28,856		128,758
	Income (loss) before taxes	$	37,073	$	2,134		$	39,207	$	46,480		$	13,524	$	60,004
	Segment Assets	$	4,825,781	$	86,949		$	4,912,730	$	4,467,574		$	125,623	$	4,593,197
	Average Loans	$	2,820,418	$	86,552		$	2,906,970	$	2,570,493		$	90,063	$	2,660,556

Basis_of_Presentation_Earnings

Basis of Presentation (Earnings per Share) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share	'	'	'	'
Net income attributable to Heartland	$6,810	$13,587	$28,854	$40,385
Preferred dividends and discount	-276	-949	-889	-2,991
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$6,534	$12,638	$27,965	$37,394
Weighted average common shares outstanding for basic earnings per share	16,936	16,474	16,904	16,484
Assumed incremental common shares issued for common stock equivalents	285	272	279	246
Weighted average common shares for diluted earnings per share	17,221	16,746	17,183	16,730
Earnings per common share b basic (in dollars per share)	$0.39	$0.77	$1.65	$2.27
Earnings per common share b diluted (in dollars per share)	$0.38	$0.75	$1.63	$2.24
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	105	446	105	446

Basis_of_Presentation_StockBas

Basis of Presentation (Stock-Based Compensation) (Details) (USD $)

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

12 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Jan. 22, 2013

Jan. 17, 2012

Sep. 30, 2013

Sep. 30, 2013

Jan. 22, 2013

Jan. 17, 2012

Dec. 31, 2008

Dec. 31, 2008

Dec. 31, 2008

Dec. 31, 2008

Long-Term Incentive Plan 2012

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Performance-Based Restricted Stock Units

Performance-Based Restricted Stock Units

Stock Option

Period One

Period Two

Period Three

Long-Term Incentive Plan 2005

Long-Term Incentive Plan 2005

Long-Term Incentive Plan 2005

Long-Term Incentive Plan 2005

Long-Term Incentive Plan 2005

Long-Term Incentive Plan 2005

Stock Option

Stock Option

Stock Option

equal_installments

Grants Made in 2012

Stock-Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares for issuance under future awards

'

'

450,796

'

'

'

'

'

'

'

'

'

'

Equity instruments other than options, granted (in shares)

'

'

'

72,595

94,001

'

'

40,990

49,801

'

'

'

'

Share-based compensation, award vesting periods

'

'

'

'

'

'5 years

'

'

'

'

'3 years

'4 years

'5 years

Award vesting, number of equal installments

'

'

'

'

'

3

'

'

'

'

'

'

'

Award, employee age threshold

'

'

'

'

'

'62 years

'

'

'

'

'

'

'

Years of service required to vest after retirement

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

Typical options expiration period after date of grant

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

Share-based compensation, award service periods

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at January 1 (in shares)

377,907

570,762

'

'

'

'

'

'

'

'

'

'

'

Shares Granted (in shares)

0

0

'

'

'

'

'

'

'

'

'

'

'

Shares Exercised (in shares)

-68,586

-112,699

'

'

'

'

'

'

'

'

'

'

'

Shares Forfeited (in shares)

-1,800

-12,334

'

'

'

'

'

'

'

'

'

'

'

Outstanding at September 30 (in shares)

307,521

445,729

'

'

'

'

'

'

'

'

'

'

'

Options exercisable at September 30 (in shares)

307,521

399,846

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Outstanding at January 1 (in dollars per share)

$22.62

$21.06

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Granted (in dollars per share)

$0

$0

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Exercised (in dollars per share)

$19.54

$17.07

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Forfeited (in dollars per share)

$26.68

$23.68

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Outstanding at September 30 (in dollars per share)

$23.28

$22

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price, Options exercisable at September 30 (in dollars per share)

$23.28

$22.39

'

'

'

'

'

'

'

'

'

'

'

Vested options, weighted average remaining contractual life

'2 years 11 months 26 days

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value for vested options

$1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value for the total of all options exercised

571,000

'

'

'

'

'

'

'

'

'

'

'

'

Maximum exercise period

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

Cash received from options exercised

1,300,000

1,900,000

'

'

'

'

'

'

'

'

'

'

'

Tax benefit from options exercised

68,000

174,000

'

'

'

'

'

'

'

'

'

'

'

Share-based compensation costs

1,500,000

1,600,000

'

'

'

'

'

'

'

'

'

'

'

Share-based unrecognized compensation costs

$3,300,000

'

'

'

'

'

'

'

'

'

'

'

'

Acquisitions_Details

Acquisitions (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Oct. 18, 2013
				Morrill & Janes Bank and Trust Company	Subsequent Event [Member]
					Morrill & Janes Bank and Trust Company
Business Acquisition [Line Items]	'	'	'	'	'
Assets	$4,912,730,000	$4,990,553,000	$4,593,197,000	$790,000,000	'
Loans and leases receivable, net	2,866,271,000	2,790,087,000	'	385,000,000	'
Consideration transferred	'	'	'	'	55,400,000
Purchase price paid in cash	'	'	'	'	16,600,000
Purchase price paid in cash, percentage	'	'	'	'	30.00%
Purchase price paid by delivery of shares of common stock	'	'	'	'	$38,800,000
Purchase price paid by delivery of shares of common stock, percentage	'	'	'	'	70.00%
Business acquisition, number of shares issued	'	'	'	'	1,402,431

Securities_Securities_availabl

Securities (Securities available for sale) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$1,409,106	$1,472,565
Gross Unrealized Gains	18,616	43,738
Gross Unrealized Losses	-36,112	-10,228
Estimated Fair Value	1,391,610	1,506,075
Debt Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	1,387,569	1,451,313
Gross Unrealized Gains	18,553	43,005
Gross Unrealized Losses	-36,112	-10,228
Estimated Fair Value	1,370,010	1,484,090
U.S. Government Corporations and Agencies	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	7,836	21,002
Gross Unrealized Gains	192	443
Gross Unrealized Losses	0	-1
Estimated Fair Value	8,028	21,444
Mortgage-Backed Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	942,819	1,027,234
Gross Unrealized Gains	9,778	19,002
Gross Unrealized Losses	-19,450	-10,035
Estimated Fair Value	933,147	1,036,201
Obligations of States and Political Subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	436,914	403,077
Gross Unrealized Gains	8,583	23,560
Gross Unrealized Losses	-16,662	-192
Estimated Fair Value	428,835	426,445
Equity Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	21,537	21,252
Gross Unrealized Gains	63	733
Gross Unrealized Losses	0	0
Estimated Fair Value	$21,600	$21,985

Securities_Held_to_maturity_se

Securities (Held to maturity securities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	$53,841	$55,502
Gross Unrealized Gains	290	492
Gross Unrealized Losses	-238	-12
Estimated Fair Value	53,893	55,982
Mortgage-Backed Securities	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	6,045	7,040
Gross Unrealized Gains	290	492
Gross Unrealized Losses	-238	-12
Estimated Fair Value	6,097	7,520
Obligations of States and Political Subdivisions	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	47,796	48,462
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$47,796	$48,462

Securities_Securities_availabl1

Securities (Securities available for sale (debt maturities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortized Cost	'	'
Due in 1 year or less	$7,737	'
Due in 1 to 5 years	38,189	'
Due in 5 to 10 years	47,239	'
Due after 10 years	351,585	'
Total debt securities	444,750	'
Mortgage-backed securities	942,819	'
Equity securities	21,537	'
Total investment securities	1,409,106	1,472,565
Estimated Fair Value	'	'
Due in 1 year or less	7,808	'
Due in 1 to 5 years	39,952	'
Due in 5 to 10 years	48,207	'
Due after 10 years	340,896	'
Total debt securities	436,863	'
Mortgage-backed securities	933,147	'
Equity securities	21,600	'
Estimated Fair Value	$1,391,610	$1,506,075

Securities_Securities_held_to_

Securities (Securities held to maturity (debt maturities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortized Cost	'	'
Due in 1 year or less	$0	'
Due in 1 to 5 years	1,281	'
Due in 5 to 10 years	10,200	'
Due after 10 years	36,315	'
Total debt securities	47,796	'
Mortgage-backed securities	6,045	'
Total investment securities	53,841	55,502
Estimated Fair Value	'	'
Due in 1 year or less	0	'
Due in 1 to 5 years	1,281	'
Due in 5 to 10 years	10,200	'
Due after 10 years	36,315	'
Total debt securities	47,796	'
Mortgage-backed securities	6,097	'
Estimated Fair Value	$53,893	$55,982

Securities_Realized_gain_loss_

Securities (Realized gain (loss)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]	'	'	'	'
Proceeds from sales	$130,031	$147,199	$347,170	$488,350
Gross security gains	1,420	5,212	7,703	14,592
Gross security losses	$302	$0	$1,091	$486

Securities_Available_for_sale_

Securities (Available for sale securities losses) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 months, Fair Value	$934,698	$356,862
Less than 12 months, Unrealized Losses	-35,191	-9,314
12 months or longer, Fair Value	30,886	24,489
12 months or longer, Unrealized Losses	-921	-914
Total, Fair Value	965,584	381,351
Total, Unrealized Losses	-36,112	-10,228
U.S. Government Corporations and Agencies	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 months, Fair Value	0	1,517
Less than 12 months, Unrealized Losses	0	-1
12 months or longer, Fair Value	0	0
12 months or longer, Unrealized Losses	0	0
Total, Fair Value	0	1,517
Total, Unrealized Losses	0	-1
Mortgage-Backed Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 months, Fair Value	679,247	332,842
Less than 12 months, Unrealized Losses	-18,529	-9,121
12 months or longer, Fair Value	30,886	24,489
12 months or longer, Unrealized Losses	-921	-914
Total, Fair Value	710,133	357,331
Total, Unrealized Losses	-19,450	-10,035
Obligations of States and Political Subdivisions	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 months, Fair Value	255,451	22,503
Less than 12 months, Unrealized Losses	-16,662	-192
12 months or longer, Fair Value	0	0
12 months or longer, Unrealized Losses	0	0
Total, Fair Value	255,451	22,503
Total, Unrealized Losses	($16,662)	($192)

Securities_Held_to_maturity_se1

Securities (Held to maturity securities losses) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Less than 12 months, Fair Value	$0	$0
Less than 12 months, Unrealized Losses	0	0
12 months or longer, Fair Value	3,082	3,296
12 months or longer, Unrealized Losses	-238	-12
Total, Fair Value	3,082	3,296
Total, Unrealized Losses	-238	-12
Mortgage-Backed Securities	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Less than 12 months, Fair Value	0	0
Less than 12 months, Unrealized Losses	0	0
12 months or longer, Fair Value	3,082	3,296
12 months or longer, Unrealized Losses	-238	-12
Total, Fair Value	3,082	3,296
Total, Unrealized Losses	-238	-12
Obligations of States and Political Subdivisions	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Less than 12 months, Fair Value	0	0
Less than 12 months, Unrealized Losses	0	0
12 months or longer, Fair Value	0	0
12 months or longer, Unrealized Losses	0	0
Total, Fair Value	0	0
Total, Unrealized Losses	$0	$0

Securities_Otherthantemporary_

Securities (Other-than-temporary impairments) (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
	securities					Available-for-sale Securities	Available-for-sale Securities	Held-to-maturity Securities	Held-to-maturity Securities	Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'	'	'	'	'	'	'
Non-credit related OTTI	'	'	'	'	'	'	'	$540	$612	'
OTTI write-downs included in earnings, available for sale debt securities	184	0	0	0	184	'	'	'	'	'
OTTI write-downs included in earnings, held to maturity debt securities	797	0	0	0	797	'	'	'	'	'
Credit related OTTI	'	0	0	0	981	'	'	'	'	'
Intent to sell OTTI	'	0	0	0	0	'	'	'	'	'
Total debt security OTTI write-downs included in earnings	981	0	0	0	981	'	'	'	'	'
Non-credit related impairment recorded directly to AOCI	'	0	0	0	683	'	'	'	'	'
Accretion of non-credit related impairment	'	-24	-24	-72	-47	'	'	'	'	'
Total recorded directly to AOCI for increase in non-credit related impairment	'	-24	-24	-72	636	'	'	'	'	'
Total OTTI losses recorded on debt securities	'	-24	-24	-72	1,617	'	'	'	'	'
Credit losses related OTTI	'	'	'	'	'	$184	$184	$797	$797	'
Percentage of Heartland's mortgage-backed securities	'	'	'	'	'	'	'	'	'	84.00%
Number of mortgage-backed securities with recorded OTTI	3	'	'	'	'	'	'	'	'	'

Loans_and_Leases_Loans_and_lea

Loans and Leases (Loans and leases receivable) (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

In Thousands, unless otherwise specified

Commercial

Commercial

Commercial Real Estate

Commercial Real Estate

Agricultural and Agricultural Real Estate

Agricultural and Agricultural Real Estate

Commercial and Commercial Real Estate

Commercial and Commercial Real Estate

Residential Real Estate

Residential Real Estate

Consumer

Consumer

Gross Loans and Leases Receivable Held to Maturity

Gross Loans and Leases Receivable Held to Maturity

Citizens Finance Co

Minimum

Minimum

Maximum

Maximum

Loans and Finance Receivables

Commercial and Commercial Real Estate

Residential Real Estate

Commercial and Commercial Real Estate

Residential Real Estate

Consumer

Loans and Leases [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans and leases receivable held to maturity

$2,904,947

$2,825,170

$755,658

$712,308

$1,287,337

$1,289,184

$324,339

$328,311

$2,042,995

$2,001,492

$269,501

$249,689

$268,112

$245,678

$2,904,947

$2,825,170

'

'

'

'

'

Unearned discount

-232

-676

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred loan fees

-3,009

-2,945

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total net loans and leases receivable held to maturity

2,901,706

2,821,549

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans covered under loss share agreements

5,876

7,253

'

'

'

'

446

748

2,402

3,074

2,433

2,645

595

786

'

'

'

'

'

'

'

Allowance for loan and lease losses

-41,311

-38,715

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans and leases receivable, net

$2,866,271

$2,790,087

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of loan agreements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'10 years

'5 years

'30 years

Concentration risk, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

Loans_and_Leases_Allowance_for

Loans and Leases (Allowance for credit losses on financing receivables) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	$7,141	'	$4,624	'	'	'
Ending Balance Under ASC 450-20	34,170	'	34,091	'	'	'
Total	41,311	37,623	38,715	40,401	41,439	36,808
Ending Balance Evaluated for Impairment Under ASC 310-10-35	81,134	'	83,576	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	2,823,813	'	2,741,594	'	'	'
Total	2,904,947	'	2,825,170	'	'	'
Commercial	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	3,178	'	1,350	'	'	'
Ending Balance Under ASC 450-20	9,918	'	10,038	'	'	'
Total	13,096	9,436	11,388	11,268	10,287	10,547
Ending Balance Evaluated for Impairment Under ASC 310-10-35	21,696	'	9,031	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	733,962	'	703,277	'	'	'
Total	755,658	'	712,308	'	'	'
Commercial Real Estate	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	838	'	1,112	'	'	'
Ending Balance Under ASC 450-20	13,205	'	13,361	'	'	'
Total	14,043	13,671	14,473	15,300	17,057	14,621
Ending Balance Evaluated for Impairment Under ASC 310-10-35	28,018	'	45,583	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	1,259,319	'	1,243,601	'	'	'
Total	1,287,337	'	1,289,184	'	'	'
Agricultural and Agricultural Real Estate	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	619	'	109	'	'	'
Ending Balance Under ASC 450-20	2,197	'	2,029	'	'	'
Total	2,816	3,055	2,138	2,057	2,002	1,763
Ending Balance Evaluated for Impairment Under ASC 310-10-35	19,249	'	16,128	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	305,090	'	312,183	'	'	'
Total	324,339	'	328,311	'	'	'
Residential Real Estate	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	678	'	783	'	'	'
Ending Balance Under ASC 450-20	2,859	'	2,760	'	'	'
Total	3,537	3,580	3,543	3,868	3,899	3,001
Ending Balance Evaluated for Impairment Under ASC 310-10-35	6,986	'	7,443	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	262,515	'	242,246	'	'	'
Total	269,501	'	249,689	'	'	'
Consumer	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Ending Balance Under ASC 310-10-35	1,828	'	1,270	'	'	'
Ending Balance Under ASC 450-20	5,991	'	5,903	'	'	'
Total	7,819	7,881	7,173	7,908	8,193	6,874
Ending Balance Evaluated for Impairment Under ASC 310-10-35	5,185	'	5,391	'	'	'
Ending Balance Evaluated for Impairment Under ASC 450-20	262,927	'	240,287	'	'	'
Total	$268,112	'	$245,678	'	'	'

Loans_and_Leases_Financing_rec

Loans and Leases (Financing receivables, non accrual status) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Receivables [Abstract]	'	'
Nonaccrual loans	$28,339	$38,675
Nonaccrual troubled debt restructured loans	18,749	4,481
Total nonaccrual loans	47,088	43,156
Accruing loans past due 90 days or more	0	0
Performing troubled debt restructured loans	$19,371	$21,121

Loans_and_Leases_Troubled_debt

Loans and Leases (Troubled debt restructurings on financing receivables) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	loans	loans	loans	loans
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	1	1	11	6
Pre-modification recorded investment	$65	$87	$21,377	$2,911
Post-modification recorded investment	65	87	21,377	2,911
Commercial	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	0	0	3	0
Pre-modification recorded investment	0	0	17,873	0
Post-modification recorded investment	0	0	17,873	0
Commercial Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	0	0	0	2
Pre-modification recorded investment	0	0	0	1,396
Post-modification recorded investment	0	0	0	1,396
Commercial and Commercial Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	0	0	3	2
Pre-modification recorded investment	0	0	17,873	1,396
Post-modification recorded investment	0	0	17,873	1,396
Agricultural and Agricultural Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	0	0	3	2
Pre-modification recorded investment	0	0	2,576	276
Post-modification recorded investment	0	0	2,576	276
Residential Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	1	1	4	1
Pre-modification recorded investment	65	87	762	87
Post-modification recorded investment	65	87	762	87
Consumer	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans	0	0	1	1
Pre-modification recorded investment	0	0	166	1,152
Post-modification recorded investment	$0	$0	$166	$1,152

Loans_and_Leases_Troubled_debt1

Loans and Leases (Troubled debt restructured loans with payment default) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	loans	loans	loans	loans
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	1	3	4	3
Recorded investment for loans with payment defaults	$13,000	$1,439	$17,837	$1,439
Commercial	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	1	0	2	0
Recorded investment for loans with payment defaults	13,000	0	17,670	0
Commercial Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	0	1	0	1
Recorded investment for loans with payment defaults	0	1,380	0	1,380
Commercial and Commercial Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	1	1	2	1
Recorded investment for loans with payment defaults	13,000	1,380	17,670	1,380
Agricultural and Agricultural Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	0	0	0	0
Recorded investment for loans with payment defaults	0	0	0	0
Residential Real Estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	0	2	2	2
Recorded investment for loans with payment defaults	0	59	167	59
Consumer	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of loans with payment defaults	0	0	0	0
Recorded investment for loans with payment defaults	$0	$0	$0	$0

Loans_and_Leases_Loans_and_lea1

Loans and Leases (Loans and leases not covered by share agreements (credit quality indicator)) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	loans
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	$2,904,947	$2,825,170
Number of loans classified as doubtful	1	'
Number of loans classified as loss	0	'
Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	755,658	712,308
Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	1,287,337	1,289,184
Commercial and Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	2,042,995	2,001,492
Agricultural and Agricultural Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	324,339	328,311
Residential Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	269,501	249,689
Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	268,112	245,678
Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	2,645,764	2,545,323
Pass | Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	695,073	661,118
Pass | Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	1,159,006	1,134,784
Pass | Commercial and Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	1,854,079	1,795,902
Pass | Agricultural and Agricultural Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	280,501	286,264
Pass | Residential Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	253,502	227,925
Pass | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	257,682	235,232
Nonpass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	259,183	279,847
Nonpass | Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	60,585	51,190
Nonpass | Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	128,331	154,400
Nonpass | Commercial and Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	188,916	205,590
Nonpass | Agricultural and Agricultural Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	43,838	42,047
Nonpass | Residential Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	15,999	21,764
Nonpass | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	$10,430	$10,446

Loans_and_Leases_Loans_and_lea2

Loans and Leases (Loans and leases not covered by share agreements (in text)) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	$2,904,947	$2,825,170
Impaired loans, related allowance	7,141	4,624
Loans delinquent 30 to 89 days, percentage	0.69%	'
Nonpass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Percent of nonaccrual loans	18.00%	15.00%
Loans and leases receivable	259,183	279,847
Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Percent of loans	50.00%	50.00%
Substandard	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Percent of loans	45.00%	50.00%
Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Percent of loans	5.00%	'
Performing Troubled Debt Restructured Loan	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans and leases receivable	13,000	'
Impaired loans, related allowance	$2,200	'

Loans_and_Leases_Loans_and_lea3

Loans and Leases (Loans and leases not covered by share agreements (past due financing receivables)) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	$18,687	$7,173
60-89 Days Past Due	1,500	2,056
90 Days or More Past Due	0	0
Total Past Due	20,187	9,229
Current	2,837,672	2,772,785
Nonaccrual	47,088	43,156
Total	2,904,947	2,825,170
Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	3,537	1,143
60-89 Days Past Due	76	525
90 Days or More Past Due	0	0
Total Past Due	3,613	1,668
Current	733,222	708,459
Nonaccrual	18,823	2,181
Total	755,658	712,308
Commercial Real Estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	2,611	1,631
60-89 Days Past Due	495	494
90 Days or More Past Due	0	0
Total Past Due	3,106	2,125
Current	1,270,831	1,259,112
Nonaccrual	13,400	27,947
Total	1,287,337	1,289,184
Commercial and Commercial Real Estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	6,148	2,774
60-89 Days Past Due	571	1,019
90 Days or More Past Due	0	0
Total Past Due	6,719	3,793
Current	2,004,053	1,967,571
Nonaccrual	32,223	30,128
Total	2,042,995	2,001,492
Agricultural and Agricultural Real Estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	9,021	687
60-89 Days Past Due	132	0
90 Days or More Past Due	0	0
Total Past Due	9,153	687
Current	309,128	324,545
Nonaccrual	6,058	3,079
Total	324,339	328,311
Residential Real Estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	236	1,278
60-89 Days Past Due	0	234
90 Days or More Past Due	0	0
Total Past Due	236	1,512
Current	263,620	241,860
Nonaccrual	5,645	6,317
Total	269,501	249,689
Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	3,282	2,434
60-89 Days Past Due	797	803
90 Days or More Past Due	0	0
Total Past Due	4,079	3,237
Current	260,871	238,809
Nonaccrual	3,162	3,632
Total	$268,112	$245,678

Loans_and_Leases_Impaired_loan

Loans and Leases (Impaired loans not covered by loss share agreements) (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	$36,064	$36,064	$17,873
Impaired loans without a related allowance, Unpaid Contractual Balance	52,064	52,064	76,666
Total impaired loans held to maturity, Unpaid Contractual Balance	88,128	88,128	94,539
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	35,858	35,858	17,787
Impaired loans without a related allowance, Loan Balance	45,276	45,276	65,789
Total impaired loans held to maturity, Loan Balance	81,134	81,134	83,576
Impaired loans, Related Allowance Recorded	7,141	7,141	4,624
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	34,129	24,883	24,650
Impaired loans without a related allowance, Avg. Loan Balance	47,142	53,307	64,846
Total impaired loans held to maturity, Avg. Loan Balance	81,271	78,190	89,496
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	159	461	1,277
Impaired loans without a related allowance, Interest Income Recognized	372	796	1,497
Total impaired loans held to maturity, Interest Income Recognized	531	1,257	2,774
Commercial	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	15,026	15,026	2,904
Impaired loans without a related allowance, Unpaid Contractual Balance	7,512	7,512	6,596
Total impaired loans held to maturity, Unpaid Contractual Balance	22,538	22,538	9,500
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	15,026	15,026	2,904
Impaired loans without a related allowance, Loan Balance	6,670	6,670	6,127
Total impaired loans held to maturity, Loan Balance	21,696	21,696	9,031
Impaired loans, Related Allowance Recorded	3,178	3,178	1,350
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	5,892	3,560	5,082
Impaired loans without a related allowance, Avg. Loan Balance	14,980	10,242	3,813
Total impaired loans held to maturity, Avg. Loan Balance	20,872	13,802	8,895
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	21	51	88
Impaired loans without a related allowance, Interest Income Recognized	44	56	186
Total impaired loans held to maturity, Interest Income Recognized	65	107	274
Commercial Real Estate	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	7,223	7,223	6,403
Impaired loans without a related allowance, Unpaid Contractual Balance	26,390	26,390	48,967
Total impaired loans held to maturity, Unpaid Contractual Balance	33,613	33,613	55,370
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	7,027	7,027	6,384
Impaired loans without a related allowance, Loan Balance	20,991	20,991	39,199
Total impaired loans held to maturity, Loan Balance	28,018	28,018	45,583
Impaired loans, Related Allowance Recorded	838	838	1,112
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	8,494	7,625	12,671
Impaired loans without a related allowance, Avg. Loan Balance	19,507	26,630	41,814
Total impaired loans held to maturity, Avg. Loan Balance	28,001	34,255	54,485
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	81	250	813
Impaired loans without a related allowance, Interest Income Recognized	171	284	689
Total impaired loans held to maturity, Interest Income Recognized	252	534	1,502
Commercial and Commercial Real Estate	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	22,249	22,249	9,307
Impaired loans without a related allowance, Unpaid Contractual Balance	33,902	33,902	55,563
Total impaired loans held to maturity, Unpaid Contractual Balance	56,151	56,151	64,870
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	22,053	22,053	9,288
Impaired loans without a related allowance, Loan Balance	27,661	27,661	45,326
Total impaired loans held to maturity, Loan Balance	49,714	49,714	54,614
Impaired loans, Related Allowance Recorded	4,016	4,016	2,462
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	14,386	11,185	17,753
Impaired loans without a related allowance, Avg. Loan Balance	34,487	36,872	45,627
Total impaired loans held to maturity, Avg. Loan Balance	48,873	48,057	63,380
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	102	301	901
Impaired loans without a related allowance, Interest Income Recognized	215	340	875
Total impaired loans held to maturity, Interest Income Recognized	317	641	1,776
Agricultural and Agricultural Real Estate	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	7,363	7,363	1,493
Impaired loans without a related allowance, Unpaid Contractual Balance	11,886	11,886	14,654
Total impaired loans held to maturity, Unpaid Contractual Balance	19,249	19,249	16,147
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	7,363	7,363	1,493
Impaired loans without a related allowance, Loan Balance	11,886	11,886	14,635
Total impaired loans held to maturity, Loan Balance	19,249	19,249	16,128
Impaired loans, Related Allowance Recorded	619	619	109
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	12,965	6,885	379
Impaired loans without a related allowance, Avg. Loan Balance	6,691	10,828	13,728
Total impaired loans held to maturity, Avg. Loan Balance	19,656	17,713	14,107
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	22	65	83
Impaired loans without a related allowance, Interest Income Recognized	125	370	539
Total impaired loans held to maturity, Interest Income Recognized	147	435	622
Residential Real Estate	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	2,746	2,746	3,197
Impaired loans without a related allowance, Unpaid Contractual Balance	4,782	4,782	4,741
Total impaired loans held to maturity, Unpaid Contractual Balance	7,528	7,528	7,938
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	2,736	2,736	3,170
Impaired loans without a related allowance, Loan Balance	4,250	4,250	4,273
Total impaired loans held to maturity, Loan Balance	6,986	6,986	7,443
Impaired loans, Related Allowance Recorded	678	678	783
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	3,187	3,330	2,737
Impaired loans without a related allowance, Avg. Loan Balance	4,463	4,102	3,861
Total impaired loans held to maturity, Avg. Loan Balance	7,650	7,432	6,598
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	3	13	89
Impaired loans without a related allowance, Interest Income Recognized	23	62	65
Total impaired loans held to maturity, Interest Income Recognized	26	75	154
Consumer	'	'	'
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]	'	'	'
Impaired loans with a related allowance, Unpaid Contractual Balance	3,706	3,706	3,876
Impaired loans without a related allowance, Unpaid Contractual Balance	1,494	1,494	1,708
Total impaired loans held to maturity, Unpaid Contractual Balance	5,200	5,200	5,584
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Loan Balance	3,706	3,706	3,836
Impaired loans without a related allowance, Loan Balance	1,479	1,479	1,555
Total impaired loans held to maturity, Loan Balance	5,185	5,185	5,391
Impaired loans, Related Allowance Recorded	1,828	1,828	1,270
Impaired Financing Receivable, Average Recorded Investment [Abstract]	'	'	'
Impaired loans with a related allowance, Avg. Loan Balance	3,591	3,483	3,781
Impaired loans without a related allowance, Avg. Loan Balance	1,501	1,505	1,630
Total impaired loans held to maturity, Avg. Loan Balance	5,092	4,988	5,411
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]	'	'	'
Impaired loans with a related allowance, Interest Income Recognized	32	82	204
Impaired loans without a related allowance, Interest Income Recognized	9	24	18
Total impaired loans held to maturity, Interest Income Recognized	$41	$106	$222

Loans_and_Leases_Carrying_amou

Loans and Leases (Carrying amount loans covered by loss share agreements) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans covered by loss share agreement (carrying amount) [Line Items]	'	'
Impaired purchased loans	$1,030	$687
Non impaired purchased loans	4,846	6,566
Total covered loans	5,876	7,253
Commercial and Commercial Real Estate	'	'
Loans covered by loss share agreement (carrying amount) [Line Items]	'	'
Impaired purchased loans	530	598
Non impaired purchased loans	1,872	2,476
Total covered loans	2,402	3,074
Agricultural and Agricultural Real Estate	'	'
Loans covered by loss share agreement (carrying amount) [Line Items]	'	'
Impaired purchased loans	0	0
Non impaired purchased loans	446	748
Total covered loans	446	748
Residential Real Estate	'	'
Loans covered by loss share agreement (carrying amount) [Line Items]	'	'
Impaired purchased loans	0	0
Non impaired purchased loans	2,433	2,645
Total covered loans	2,433	2,645
Consumer	'	'
Loans covered by loss share agreement (carrying amount) [Line Items]	'	'
Impaired purchased loans	500	89
Non impaired purchased loans	95	697
Total covered loans	$595	$786

Loans_and_Leases_Troubled_debt2

Loans and Leases (Troubled debt in text) (Details) (USD $)	Jul. 02, 2009	Jul. 02, 2009	Jul. 02, 2009	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified	Elizabeth State Bank	Impaired Purchased Loans	Nonimpaired Purchased Loans	Galena State Bank & Trust Co.	Non-residential Real Estate	Non-residential Real Estate	Residential Real Estate
		Elizabeth State Bank	Elizabeth State Bank	agreements	Losses	Recoveries	Galena State Bank & Trust Co.
					Galena State Bank & Trust Co.	Galena State Bank & Trust Co.
Financing Receivable, Modifications [Line Items]	'	'	'	'	'	'	'
Contractually required payments of loans acquired	$42.70	$13.80	$28.90	'	'	'	'
Estimated fair value of loans acquired	37.8	9	28.7	'	'	'	'
Number of loss share agreements	'	'	'	2	'	'	'
Shared loss arrangement, maximum covered assets	'	'	'	$10	'	'	'
Loss sharing agreement, term	'	'	'	'	'5 years	'8 years	'10 years

Allowance_for_Loan_and_Lease_L2

Allowance for Loan and Lease Losses (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	$37,623	$41,439	$38,715	$36,808
Charge-offs	-2,513	-3,050	-8,350	-6,912
Recoveries	1,052	2,514	3,298	5,653
Provision	5,149	-502	7,648	4,852
Ending Balance	41,311	40,401	41,311	40,401
Commercial	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	9,436	10,287	11,388	10,547
Charge-offs	-163	-107	-1,422	-814
Recoveries	78	1,550	983	1,799
Provision	3,745	-462	2,147	-264
Ending Balance	13,096	11,268	13,096	11,268
Commercial Real Estate	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	13,671	17,057	14,473	14,621
Charge-offs	-630	-1,668	-2,561	-2,762
Recoveries	514	717	1,279	2,996
Provision	488	-806	852	445
Ending Balance	14,043	15,300	14,043	15,300
Agricultural	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	3,055	2,002	2,138	1,763
Charge-offs	0	-1	-23	-1
Recoveries	1	1	100	82
Provision	-240	55	601	213
Ending Balance	2,816	2,057	2,816	2,057
Residential Real Estate	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	3,580	3,899	3,543	3,001
Charge-offs	-450	-100	-856	-376
Recoveries	76	95	102	161
Provision	331	-26	748	1,082
Ending Balance	3,537	3,868	3,537	3,868
Consumer	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	7,881	8,193	7,173	6,874
Charge-offs	-1,270	-1,174	-3,488	-2,959
Recoveries	383	151	834	615
Provision	825	738	3,300	3,378
Ending Balance	7,819	7,908	7,819	7,908
Leases	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	0	1	0	2
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	-1	0	-2
Ending Balance	0	0	0	0
Unallocated	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Beginning Balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	0	0	0
Ending Balance	$0	$0	$0	$0

Goodwill_Core_Deposit_Premium_2

Goodwill, Core Deposit Premium and Other Intangible Assets (Goodwill) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Goodwill	$30,627	$30,627

Goodwill_Core_Deposit_Premium_3

Goodwill, Core Deposit Premium and Other Intangible Assets (Carrying amount of intangible assets (incl accumulated amortization) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$43,940	$35,737
Accumulated Amortization	20,505	17,251
Net Carrying Amount	23,435	18,486
Core Deposits [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	11,668	11,668
Accumulated Amortization	9,887	9,327
Net Carrying Amount	1,781	2,341
Mortgage Servicing Rights [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	31,095	22,892
Accumulated Amortization	9,899	7,239
Net Carrying Amount	21,196	15,653
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	1,177	1,177
Accumulated Amortization	719	685
Net Carrying Amount	$458	$492

Goodwill_Core_Deposit_Premium_4

Goodwill, Core Deposit Premium and Other Intangible Assets (Estimated future amortization expense for amortizable intangible assets) (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Future amortization expense for amortizable intangible assets [Line Items]	'
Three months ending December 31, 2013	$1,767
Year ending December 31, 2014	7,051
Year ending December 31, 2015	5,541
Year ending December 31, 2016	4,203
Year ending December 31, 2017	2,868
Year ending December 31, 2018	1,535
Thereafter	470
Core Deposits [Member]	'
Future amortization expense for amortizable intangible assets [Line Items]	'
Three months ending December 31, 2013	181
Year ending December 31, 2014	468
Year ending December 31, 2015	267
Year ending December 31, 2016	238
Year ending December 31, 2017	212
Year ending December 31, 2018	187
Thereafter	228
Mortgage Servicing Rights [Member]	'
Future amortization expense for amortizable intangible assets [Line Items]	'
Three months ending December 31, 2013	1,575
Year ending December 31, 2014	6,540
Year ending December 31, 2015	5,232
Year ending December 31, 2016	3,924
Year ending December 31, 2017	2,616
Year ending December 31, 2018	1,309
Thereafter	0
Customer Relationships [Member]	'
Future amortization expense for amortizable intangible assets [Line Items]	'
Three months ending December 31, 2013	11
Year ending December 31, 2014	43
Year ending December 31, 2015	42
Year ending December 31, 2016	41
Year ending December 31, 2017	40
Year ending December 31, 2018	39
Thereafter	$242

Goodwill_Core_Deposit_Premium_5

Goodwill, Core Deposit Premium and Other Intangible Assets (Mortgage loans servicing) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
					Mortgage Servicing Rights 15-year Tranche [Member]	Mortgage Servicing Rights 15-year Tranche [Member]	Mortgage Servicing Rights 30-year Tranche [Member]	Mortgage Servicing Rights 30-year Tranche [Member]	GNMA [Member]
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'	'	'	'	'	'
Mortgage loans serviced for others	$2,890,000,000	$2,200,000,000	'	'	'	'	'	'	'
Valuation allowance	0	496,000	'	'	'	'	'	'	'
Valuation servicing rights in tranches [Line Items]	'	'	'	'	'	'	'	'	'
Servicing asset at amortized value	31,200,000	16,000,000	'	'	4,800,000	3,300,000	23,600,000	12,600,000	2,800,000
Servicing asset, agreement term	'	'	'	'	'15 years	'15 years	'30 years	'	'
Servicing asset at amortized cost	$21,196,000	$15,653,000	$13,791,000	$11,276,000	$3,200,000	$3,000,000	$16,200,000	$12,600,000	$1,800,000

Goodwill_Core_Deposit_Premium_6

Goodwill, Core Deposit Premium and Other Intangible Assets (Changes in capitalized mortgage servicing rights) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Finite-lived Intangible Assets [Roll Forward]	'	'	'	'
Balance at beginning of period	'	'	$15,653	$11,276
Originations	'	'	10,595	7,916
Amortization	'	'	-5,548	-4,727
Valuation adjustment	0	-493	496	-674
Balance at end of period	$21,196	$13,791	$21,196	$13,791

Borrowings_Details

Borrowings (Details) (USD $)	Sep. 30, 2013	Jun. 14, 2013	Jun. 14, 2013	Jun. 13, 2013
	credit_line		Line of Credit 1	Line of Credit 1
			credit_line
Line of Credit Facility [Line Items]	'	'	'	'
Number of credit lines	2	'	1	'
Maximum borrowing capacity	'	$25,000,000	$20,000,000	$5,000,000
Amount outstanding	$0	'	'	'

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Cash collateral on derivative financial instruments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Cash pledged as collateral	$6,200	$6,700
Counterparties	'	'
Derivative [Line Items]	'	'
Cash pledged as collateral	$15	$0

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Estimated cash payments and reclassification to interest expense) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Change in net unrealized losses on cash flow hedges	$1.60
Estimated amount to be reclassified from accumulated other comprehensive income to interest expense within the next twelve months	$2.10

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Executed interest rate swap) (Details) (USD $)	Apr. 20, 2011	Mar. 31, 2009
In Millions, unless otherwise specified	Interest Rate Swap 1	Interest Rate Swap
		transaction
Derivative [Line Items]	'	'
Derivative, notional amount	$15	$65
Number of instruments held	'	3

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) (Other Liabilities, USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Interest Rate Swap 1	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	$12,046	$13,002
Fair Value	-509	-711
Receive Rate	2.93%	2.96%
Weighted Average Pay Rate	5.14%	5.14%
Interest Rate Swap 2	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	25,000	25,000
Fair Value	-289	-708
Receive Rate	0.25%	0.31%
Weighted Average Pay Rate	2.58%	2.58%
Interest Rate Swap 3	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	20,000	20,000
Fair Value	-1,637	-2,186
Receive Rate	0.26%	0.31%
Weighted Average Pay Rate	3.22%	3.22%
Interest Rate Swap 4	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	20,000	20,000
Fair Value	($1,905)	($3,020)
Receive Rate	0.27%	0.35%
Weighted Average Pay Rate	3.36%	3.36%

Derivative_Financial_Instrumen6

Derivative Financial Instruments (Gains (losses) recognized on derivatives (cash flow hedges)) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Interest Expense | Interest Rate Swap 1	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	$203	($58)
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	-210	-226
Interest Expense | Interest Rate Swap 2	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	419	189
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	-436	-397
Interest Expense | Interest Rate Swap 3	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	548	-262
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	-446	-421
Interest Expense | Interest Rate Swap 4	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	1,115	-606
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	-460	-442
Other Income | Interest Rate Swap 1	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	0	0
Other Income | Interest Rate Swap 2	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	0	0
Other Income | Interest Rate Swap 3	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	0	0
Other Income | Interest Rate Swap 4	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	$0	$0

Derivative_Financial_Instrumen7

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (not designated as hedging instruments)) (Details) (Not Designated as Hedging Instrument, USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Other Assets | Interest Rate Lock Commitments	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	$104,098	$267,397
Fair Value	4,601	9,353
Other Assets | Forward Contracts	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	69,100	168,910
Fair Value	1,271	462
Other Liabilities | Forward Contracts	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	185,942	351,996
Fair Value	($3,320)	($1,221)

Derivative_Financial_Instrumen8

Derivative Financial Instruments (Derivative instruments gains an dlosses recognized (not designated as hedging instruments)) (Details) (Gain on Sale of Loans Held for Sale, USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Interest Rate Lock Commitments	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Year-to-Date Gain(Loss) Recognized	($6,047)	$12,759
Forward Contracts	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'
Year-to-Date Gain(Loss) Recognized	($1,289)	($3,870)

Fair_Value_Fair_value_measurem

Fair Value (Fair value measurement recurring) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	$1,219	$380
Securities available for sale	1,391,610	1,506,075
Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	1,219	380
Securities available for sale	8,028	12,811
Derivative liabilities	0	0
Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	0	0
Securities available for sale	1,378,625	1,488,924
Derivative liabilities	7,660	7,846
Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	0	0
Securities available for sale	4,957	4,340
Derivative liabilities	0	0
Recurring Basis | Total Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	1,219	380
Securities available for sale	1,391,610	1,506,075
Derivative assets	5,872	9,815
Total assets at fair value	1,398,701	1,516,270
Derivative liabilities	7,660	7,846
Total liabilities at fair value	7,660	7,846
Recurring Basis | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	1,219	380
Securities available for sale	8,028	12,811
Derivative assets	0	0
Total assets at fair value	9,247	13,191
Derivative liabilities	0	0
Total liabilities at fair value	0	0
Recurring Basis | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	0	0
Securities available for sale	1,378,625	1,488,924
Derivative assets	5,872	9,815
Total assets at fair value	1,384,497	1,498,739
Derivative liabilities	7,660	7,846
Total liabilities at fair value	7,660	7,846
Recurring Basis | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Trading securities	0	0
Securities available for sale	4,957	4,340
Derivative assets	0	0
Total assets at fair value	4,957	4,340
Derivative liabilities	0	0
Total liabilities at fair value	$0	$0

Fair_Value_Fair_value_measurem1

Fair Value (Fair value measurement non-recurring) (Details) (Nonrecurring Basis, USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	$32,428		$78,952
Other real estate owned	33,018		35,822
Mortgage servicing rights	'		15,956
Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Other real estate owned	0		0
Mortgage servicing rights	'		0
Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Other real estate owned	0		0
Mortgage servicing rights	'		0
Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	32,428		78,952
Other real estate owned	33,018	[1]	35,822	[1]
Mortgage servicing rights	'		15,956
Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	1,860		14,504
Other real estate owned	2,440		6,953
Mortgage servicing rights	'		477
Commercial | Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	12,455		7,681
Commercial | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Commercial | Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Commercial | Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	12,455	[1]	7,681	[1]
Commercial | Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	472		1,799
Commercial Real Estate | Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	8,004		44,471
Commercial Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Commercial Real Estate | Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Commercial Real Estate | Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	8,004	[1]	44,471	[1]
Commercial Real Estate | Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	1,374		6,898
Agricultural and Agricultural Real Estate | Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	6,749		16,019
Agricultural and Agricultural Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Agricultural and Agricultural Real Estate | Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Agricultural and Agricultural Real Estate | Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	6,749	[1]	16,019	[1]
Agricultural and Agricultural Real Estate | Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		1
Residential Real Estate | Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	3,284		6,660
Residential Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Residential Real Estate | Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Residential Real Estate | Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	3,284	[1]	6,660	[1]
Residential Real Estate | Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		988
Consumer | Total Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	1,936		4,121
Consumer | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Consumer | Significant Other Observable Inputs (Level 2)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	0		0
Consumer | Significant Unobservable Inputs (Level 3)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	1,936	[1]	4,121	[1]
Consumer | Losses	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Collateral dependent impaired loans	$14		$4,818
[1]	Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.

Fair_Value_Quantitative_Inform

Fair Value (Quantitative Information about Level 3 fair value measurements) (Details) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Securities available for sale	1,391,610		1,506,075
Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Securities available for sale	4,957		4,340
Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Securities available for sale	4,957		4,340
Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	32,428		78,952
Other real estate owned	33,018	[1]	35,822	[1]
Mortgage servicing rights	'		15,956
Commercial | Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	12,455	[1]	7,681	[1]
Commercial Real Estate | Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	8,004	[1]	44,471	[1]
Agricultural and Agricultural Real Estate | Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	6,749	[1]	16,019	[1]
Residential Real Estate | Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	3,284	[1]	6,660	[1]
Consumer | Nonrecurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Collateral dependent impaired loans	1,936	[1]	4,121	[1]
Z-Tranche Securities | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Securities available for sale	4,957		4,340
Z-Tranche Securities | Minimum | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Pretax discount rate	7.00%		8.00%
Actual defaults	12.71%		13.94%
Actual deferrals	6.25%		6.30%
Z-Tranche Securities | Maximum | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Pretax discount rate	9.00%		10.00%
Actual defaults	20.14%		20.94%
Actual deferrals	22.35%		23.71%
Z-Tranche Securities | Weighted Average | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Actual defaults	15.52%		15.52%
Actual deferrals	11.32%		11.32%
Mortgage Servicing Rights [Member] | Minimum | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Pretax discount rate	'		12.99%
Mortgage Servicing Rights [Member] | Maximum | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Pretax discount rate	'		18.71%
Mortgage Servicing Rights [Member] | Weighted Average | Recurring Basis | Level 3	'		'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'		'
Pretax discount rate	'		18.05%
[1]	Not Meaningful. Third party appraisals are obtained as to the value of the underlying asset, but disclosure of this information would not provide meaningful information, as the range will vary widely from loan to loan. Types of discounts considered included age of the appraisal, local market conditions, current condition of the property, and estimated sales costs. These discounts will also vary from loan to loan, thus providing range would not be meaningful.

Fair_Value_Changes_Level_3_ass

Fair Value (Changes Level 3 assets (fair value, recurring)) (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Balance at January 1	$4,340	$3,243
Total gains (losses):	'	'
Included in earnings	642	0
Included in other comprehensive income	794	938
Purchases, issuances, sales and settlements:	'	'
Purchases	0	195
Sales	-651	0
Settlements	-168	-36
Balance at period end	$4,957	$4,340

Fair_Value_Estimated_fair_valu

Fair Value (Estimated fair value financial instruments (incl. carrying amounts)) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Trading securities	$1,219	$380
Securities available for sale	1,391,610	1,506,075
Held to maturity securities	53,893	55,982
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	165,008	168,054
Time deposits in other financial institutions	3,605	'
Trading securities	1,219	380
Securities available for sale	8,028	12,811
Held to maturity securities	0	0
Total securities	9,247	13,191
Loans held for sale	0	0
Loans, net	0	0
Derivatives	0	0
Short term borrowings	0	0
Other borrowings	0	0
Derivatives	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Demand Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Savings Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	'
Trading securities	0	0
Securities available for sale	1,378,625	1,488,924
Held to maturity securities	53,893	55,982
Total securities	1,432,518	1,544,906
Loans held for sale	61,640	96,165
Loans, net	2,825,746	2,702,155
Derivatives	5,872	9,815
Short term borrowings	224,048	224,626
Other borrowings	321,074	376,422
Derivatives	7,660	7,846
Significant Other Observable Inputs (Level 2) | Demand Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	1,073,688	974,232
Significant Other Observable Inputs (Level 2) | Savings Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	2,043,397	2,004,438
Significant Other Observable Inputs (Level 2) | Time Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	807,913	866,990
Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	'
Trading securities	0	0
Securities available for sale	4,957	4,340
Held to maturity securities	0	0
Total securities	4,957	4,340
Loans held for sale	0	0
Loans, net	32,428	78,952
Derivatives	0	0
Short term borrowings	0	0
Other borrowings	0	0
Derivatives	0	0
Significant Unobservable Inputs (Level 3) | Demand Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Significant Unobservable Inputs (Level 3) | Savings Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Significant Unobservable Inputs (Level 3) | Time Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	0	0
Commercial | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	0	0
Commercial | Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	723,067	683,924
Commercial | Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	12,455	7,681
Commercial Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	0	0
Commercial Real Estate | Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	1,268,190	1,236,560
Commercial Real Estate | Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	8,004	44,471
Agricultural and Agricultural Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	0	0
Agricultural and Agricultural Real Estate | Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	316,487	313,424
Agricultural and Agricultural Real Estate | Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	6,749	16,019
Residential Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	0	0
Residential Real Estate | Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	256,050	230,390
Residential Real Estate | Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	3,284	6,660
Consumer | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	0	0
Consumer | Significant Other Observable Inputs (Level 2)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	261,952	237,857
Consumer | Significant Unobservable Inputs (Level 3)	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	1,936	4,121
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	165,008	168,054
Time deposits in other financial institutions	3,605	'
Trading securities	1,219	380
Securities available for sale	1,391,610	1,506,075
Held to maturity securities	53,841	55,502
Total securities	1,446,670	1,561,957
Loans held for sale	61,326	96,165
Loans, net	2,866,271	2,790,087
Derivatives	5,872	9,815
Short term borrowings	224,048	224,626
Other borrowings	322,538	389,025
Derivatives	7,660	7,846
Carrying Amount | Demand Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	1,073,688	974,232
Carrying Amount | Savings Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	2,043,397	2,004,438
Carrying Amount | Time Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	807,913	866,990
Carrying Amount | Commercial	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	741,728	700,225
Carrying Amount | Commercial Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	1,274,043	1,275,770
Carrying Amount | Agricultural and Agricultural Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	322,502	326,867
Carrying Amount | Residential Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	267,341	248,608
Carrying Amount | Consumer	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	260,657	238,617
Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	165,008	168,054
Time deposits in other financial institutions	3,605	'
Trading securities	1,219	380
Securities available for sale	1,391,610	1,506,075
Held to maturity securities	53,893	55,982
Total securities	1,446,722	1,562,437
Loans held for sale	61,640	96,165
Loans, net	2,858,174	2,781,107
Derivatives	5,872	9,815
Short term borrowings	224,048	224,626
Other borrowings	321,074	376,422
Derivatives	7,660	7,846
Estimated Fair Value | Demand Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	1,073,688	974,232
Estimated Fair Value | Savings Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	2,043,397	2,004,438
Estimated Fair Value | Time Deposits	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Deposits	807,913	866,990
Estimated Fair Value | Commercial	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	735,522	691,605
Estimated Fair Value | Commercial Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	1,276,194	1,281,031
Estimated Fair Value | Agricultural and Agricultural Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	323,236	329,443
Estimated Fair Value | Residential Real Estate	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	259,334	237,050
Estimated Fair Value | Consumer	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans, net	$263,888	$241,978

Segment_Reporting_Details

Segment Reporting (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	$39,880	$36,812	$117,471	$112,182	'
Provision for loan and lease losses	5,149	-502	7,648	4,852	'
Total noninterest income	20,718	29,766	72,044	81,432	'
Total noninterest expense	47,147	47,159	142,660	128,758	'
INCOME BEFORE INCOME TAXES	8,302	19,921	39,207	60,004	'
Segment Assets	4,912,730	4,593,197	4,912,730	4,593,197	4,990,553
Average Loans	2,937,508	2,727,806	2,906,970	2,660,556	'
Community and Other Banking	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	39,291	36,412	115,968	110,332	'
Provision for loan and lease losses	5,149	-502	7,648	4,852	'
Total noninterest income	12,309	13,988	37,630	40,902	'
Total noninterest expense	36,813	35,597	108,877	99,902	'
INCOME BEFORE INCOME TAXES	9,638	15,305	37,073	46,480	'
Segment Assets	4,825,781	4,467,574	4,825,781	4,467,574	'
Average Loans	2,867,933	2,628,811	2,820,418	2,570,493	'
Retail Mortgage Banking	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	589	400	1,503	1,850	'
Provision for loan and lease losses	0	0	0	0	'
Total noninterest income	8,409	15,778	34,414	40,530	'
Total noninterest expense	10,334	11,562	33,783	28,856	'
INCOME BEFORE INCOME TAXES	-1,336	4,616	2,134	13,524	'
Segment Assets	86,949	125,623	86,949	125,623	'
Average Loans	$69,575	$98,995	$86,552	$90,063	'