Heartland Financial USA (HTLF) 10-Q 5 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 04, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	HEARTLAND FINANCIAL USA INC
Entity Central Index Key	920,112
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		24,545,467

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 222,718	$ 237,841
Federal funds sold and other short-term investments	7,232	20,958
Cash and cash equivalents	229,950	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Available for sale, at fair value (cost of $1,556,884 at June 30, 2016, and $1,584,703 at December 31, 2015)	1,566,592	1,578,434
Held to maturity, at cost (fair value of $292,854 at June 30, 2016, and $294,513 at December 31, 2015)	270,423	279,117
Other investments, at cost	22,680	21,443
Loans held for sale	82,538	74,783
Loans and leases receivable:
Held to maturity	5,482,258	5,001,486
Allowance for loan and lease losses	(51,756)	(48,685)
Loans and leases receivable, net	5,430,502	4,952,801
Premises, furniture and equipment, net	164,812	146,259
Premises, furniture and equipment held for sale	3,889	3,889
Other real estate, net	11,003	11,524
Goodwill	127,699	97,852
Core deposit intangibles, net	25,213	22,019
Servicing assets, net	35,654	34,926
Cash surrender value on life insurance	111,425	110,297
Other assets	119,916	100,256
TOTAL ASSETS	8,204,401	7,694,754
Deposits:
Demand	2,149,911	1,914,141
Savings	3,691,791	3,367,479
Time	995,870	1,124,203
Total deposits	6,837,572	6,405,823
Short-term borrowings	303,707	293,898
Other borrowings	296,895	263,214
Accrued expenses and other liabilities	78,264	68,646
TOTAL LIABILITIES	7,516,438	7,031,581
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 30,000,000 shares authorized at both June 30, 2016, and December 31, 2015; issued 24,544,261 shares at June 30, 2016, and 22,435,693 shares at December 31, 2015)	24,544	22,436
Capital surplus	274,682	216,436
Retained earnings	384,479	348,630
Accumulated other comprehensive income (loss)	513	(6,027)
Treasury stock at cost (885 shares at June 30, 2016, and 0 shares at December 31, 2015)	(32)	0
TOTAL STOCKHOLDERS' EQUITY	687,963	663,173
TOTAL LIABILITIES AND EQUITY	8,204,401	7,694,754
Series C Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	81,698
Series D Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 3,777	$ 0

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Cost of available for sale securities	$ 1,556,884	$ 1,584,703
Fair value of held to maturity securities	$ 292,854	$ 294,513
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	24,544,261	22,435,693
Treasury stock shares	885	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares outstanding	0	81,698
Series D Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 0
Preferred stock, shares authorized	3,000	0
Preferred stock, shares issued	3,000	0
Preferred stock, shares outstanding	3,000	0

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
INTEREST INCOME:
Interest and fees on loans and leases	$ 69,809	$ 55,824	$ 138,234	$ 108,873
Interest on securities:
Taxable	7,952	6,739	16,687	13,871
Nontaxable	3,566	2,874	7,076	5,790
Interest on federal funds sold	1	1	11	2
Interest on interest bearing deposits in other financial institutions	3	3	7	7
TOTAL INTEREST INCOME	81,331	65,441	162,015	128,543
INTEREST EXPENSE:
Interest on deposits	4,021	3,819	8,194	7,991
Interest on short-term borrowings	519	212	848	410
Interest on other borrowings (includes $465 and $559 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended June 30, 2016 and 2015, respectively, and $971 and $1,123 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the six months ended June 30, 2016 and 2015, respectively)	3,673	3,766	7,148	8,568
TOTAL INTEREST EXPENSE	8,213	7,797	16,190	16,969
NET INTEREST INCOME	73,118	57,644	145,825	111,574
Provision for loan and lease losses	2,118	5,674	4,185	7,345
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	71,000	51,970	141,640	104,229
NONINTEREST INCOME:
Service charges and fees	8,022	5,900	15,184	11,304
Loan servicing income	1,292	1,163	2,560	2,204
Trust fees	3,625	3,913	7,438	7,544
Brokerage and insurance commissions	886	916	1,908	2,003
Securities gains, net (includes $4,622 and $3,110 of net security gains reclassified from accumulated other comprehensive income for the three months ended June 30, 2016 and 2015, respectively, and $8,378 and $7,463 of net security gains reclassified from accumulated other comprehensive income for six months ended June 30, 2016 and 2015, respectively)	4,622	3,110	8,148	7,463
Net gains on sale of loans held for sale	11,270	14,599	22,335	28,341
Valuation allowance on commercial servicing rights	(46)	0	(46)	0
Income on bank owned life insurance	591	459	1,113	983
Other noninterest income	764	601	1,964	1,482
TOTAL NONINTEREST INCOME	31,026	30,661	60,604	61,324
NONINTEREST EXPENSES:
Salaries and employee benefits	41,985	36,851	83,699	73,489
Occupancy	5,220	4,028	10,223	8,287
Furniture and equipment	2,442	2,176	4,555	4,282
Professional fees	7,486	5,249	14,496	11,293
FDIC insurance assessments	1,120	899	2,288	1,855
Advertising	1,551	1,333	2,835	2,514
Intangible assets amortization	1,297	715	3,192	1,346
Other real estate and loan collection expenses	659	753	1,231	1,218
(Gain)/loss on sales/valuations of assets, net	(43)	1,509	270	1,862
Other noninterest expenses	9,303	9,969	18,540	16,950
TOTAL NONINTEREST EXPENSES	71,020	63,482	141,329	123,096
Income (loss) before taxes	31,006	19,149	60,915	42,457
Income taxes (includes $1,551 and $952 of income tax expense reclassified from accumulated other comprehensive income for the three months ended June 30, 2016 and 2015, respectively, and $2,763 and $2,365 of income tax expense reclassified from accumulated other comprehensive income for the six months ended June 30, 2016 and 2015, respectively)	10,036	3,989	19,936	11,588
NET INCOME	20,970	15,160	40,979	30,869
Preferred dividends	(52)	(204)	(220)	(408)
Interest expense on convertible preferred debt	31	0	31	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 20,949	$ 14,956	$ 40,790	$ 30,461
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.85	$ 0.73	$ 1.69	$ 1.49
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.84	0.72	1.66	1.47
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.10	$ 0.10	$ 0.20	$ 0.20

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest expense related to derivatives reclassified from accumulated other comprehensive income	$ 3,673	$ 3,766	$ 7,148	$ 8,568
Net security gains reclassified from accumulated other comprehensive income	4,622	3,110	8,148	7,463
Income tax expense reclassified from accumulated other comprehensive income	10,036	3,989	19,936	11,588
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Derivatives
Interest expense related to derivatives reclassified from accumulated other comprehensive income	465	559	971	1,123
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Net security gains reclassified from accumulated other comprehensive income	4,622	3,110	8,378	7,463
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income (Loss)
Income tax expense reclassified from accumulated other comprehensive income	$ 1,551	$ 952	$ 2,763	$ 2,365

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 20,970	$ 15,160	$ 40,979	$ 30,869
Securities:
Net change in unrealized gain (loss) on securities	3,903	(2,764)	23,970	8,714
Reclassification adjustment for net gains realized in net income	(4,622)	(3,110)	(8,378)	(7,463)
Net change in non-credit related other than temporary impairment	0	24	7	48
Income taxes	289	2,361	(6,235)	(498)
Other comprehensive income (loss) on securities	(430)	(3,489)	9,364	801
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain (loss) on derivatives	(2,044)	1,509	(5,467)	55
Reclassification adjustment for net losses on derivatives realized in net income	465	559	971	1,123
Income taxes	598	(775)	1,672	(448)
Other comprehensive income (loss) on cash flow hedges	(981)	1,293	(2,824)	730
Other comprehensive income (loss)	(1,411)	(2,196)	6,540	1,531
TOTAL COMPREHENSIVE INCOME	$ 19,559	$ 12,964	$ 47,519	$ 32,400

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 40,979	$ 30,869
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,841	11,174
Provision for loan and lease losses	4,185	7,345
Net amortization of premium on securities	16,204	14,645
Securities gains, net	(8,148)	(7,463)
Stock based compensation	2,386	1,908
Write downs and losses on repossessed assets, net	574	924
Loans originated for sale	(546,050)	(724,081)
Proceeds on sales of loans held for sale	554,427	710,753
Net gains on sale of loans held for sale	(16,132)	(21,328)
Decrease in accrued interest receivable	1,651	1,478
Decrease in prepaid expenses	683	100
Decrease in accrued interest payable	(406)	(867)
Capitalization of servicing rights	(6,203)	(7,156)
Valuation adjustment on commercial servicing rights	46	0
Write downs and losses on sales of assets, net	(304)	938
Other, net	(8,316)	(10,275)
NET CASH PROVIDED BY OPERATING ACTIVITIES	50,417	8,964
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	622,375	526,026
Proceeds from the sale of securities held to maturity	4,057	0
Proceeds from the sale of other investments	4,116	10,336
Proceeds from the maturity of and principal paydowns on securities available for sale	82,513	86,625
Proceeds from the maturity of and principal paydowns on securities held to maturity	3,962	646
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	250	250
Purchase of securities available for sale	(594,135)	(529,670)
Purchase of other investments	(1,867)	(9,009)
Net (increase) decrease in loans and leases	98,232	(184,039)
Purchase of bank owned life insurance policies	0	(1,100)
Capital expenditures	(7,360)	(3,984)
Net cash and cash equivalents received in acquisition	8,084	7,103
Proceeds from the sale of equipment	485	15
Proceeds on sale of OREO and other repossessed assets	3,161	5,402
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	223,873	(91,399)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits and savings accounts	61,509	64,348
Net increase (decrease) in time deposit accounts	(277,871)	50,980
Net increase (decrease) in short-term borrowings	(63,807)	86,718
Proceeds from short term FHLB advances	210,000	248,100
Repayments of short term FHLB advances	(172,150)	(212,000)
Proceeds from other borrowings	40,000	29,000
Repayments of other borrowings	(14,495)	(134,389)
Redemption of preferred stock	(81,698)	0
Purchase of treasury stock	(1,698)	(2,173)
Proceeds from issuance of common stock	1,101	1,578
Excess tax benefits on exercised stock options	1,100	651
Dividends paid	(5,130)	(4,527)
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES	(303,139)	128,286
Net increase (decrease) in cash and cash equivalents	(28,849)	45,851
Cash and cash equivalents at beginning of year	258,799	73,871
CASH AND CASH EQUIVALENTS AT END OF PERIOD	229,950	119,722
Supplemental disclosures:
Cash paid for income/franchise taxes	12,570	6,969
Cash paid for interest	16,595	20,836
Loans transferred to OREO	1,359	4,046
Sales of securities available for sale, accrued, not settled	2,201	34,129
Purchase of securities available for sale, accrued, not settled	64	0
Stock consideration granted for acquisition	$ 57,433	$ 53,052

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Series C Preferred Stock	Series D Preferred Stock	Preferred Stock	Preferred StockSeries C Preferred Stock	Preferred StockSeries D Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Retained EarningsSeries C Preferred Stock	Retained EarningsSeries D Preferred Stock	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at beginning of period at Dec. 31, 2014	$ 496,317			$ 81,698			$ 18,511	$ 95,816	$ 298,764			$ 1,528	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	32,400								30,869			1,531
Cash dividends declared:
Series C/D Preferred		$ (408)								$ (408)
Common, $0.20 per share	(4,119)								(4,119)
Purchase of shares of common stock	(2,173)												(2,173)
Issuance of shares of common stock	55,281						2,105	51,065					2,111
Stock based compensation	1,908							1,908
Balance at end of period at Jun. 30, 2015	579,206			81,698			20,616	148,789	325,106			3,059	(62)
Balance at beginning of period at Dec. 31, 2015	663,173			81,698			22,436	216,436	348,630			(6,027)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	47,519								40,979			6,540
Cash dividends declared:
Series C/D Preferred		(168)	$ (52)							$ (168)	$ (52)
Common, $0.20 per share	(4,910)								(4,910)
Redemption of Series C preferred stock		$ (81,698)			$ (81,698)
Issuance of Series D preferred stock			$ 3,777			$ 3,777
Purchase of shares of common stock	(1,698)												(1,698)
Issuance of shares of common stock	59,634						2,108	55,860					1,666
Stock based compensation	2,386							2,386
Balance at end of period at Jun. 30, 2016	$ 687,963			$ 3,777			$ 24,544	$ 274,682	$ 384,479			$ 513	$ (32)

Consolidated Statements of Cha9

Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash dividends per share common stock (in dollars per share)	$ 0.20	$ 0.20
Shares of common stock purchased	33,503	36,176
Shares of common stock issued	2,141,186	2,139,376
Series C Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 2.50	$ 5
Series D Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 17.50

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2016
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, 2015 , included in the Form 10-K of Heartland Financial USA, Inc. ("Heartland") filed with the Securities and Exchange Commission ("SEC") on March 11, 2016 . Accordingly, foot note 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 June 30, 2016 , are not necessarily indicative of the results expected for the year ending December 31, 2016. 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- and six -month periods ended June 30, 2016 and 2015 , are shown in the table below: Three Months Ended (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 20,970 $ 15,160 Preferred dividends and discount (52 ) (204 ) Interest expense on convertible preferred debt 31 — Net income available to common stockholders $ 20,949 $ 14,956 Weighted average common shares outstanding for basic earnings per share 24,524 20,599 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 451 278 Weighted average common shares for diluted earnings per share 24,975 20,877 Earnings per common share — basic $ 0.85 $ 0.73 Earnings per common share — diluted $ 0.84 $ 0.72 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — — Six Months Ended (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 40,979 $ 30,869 Preferred dividends (220 ) (408 ) Interest expense on convertible preferred debt 31 — Net income available to common stockholders $ 40,790 $ 30,461 Weighted average common shares outstanding for basic earnings per share 24,093 20,408 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 448 274 Weighted average common shares for diluted earnings per share 24,541 20,682 Earnings per common share — basic $ 1.69 $ 1.49 Earnings per common share — diluted $ 1.66 $ 1.47 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — — 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 was originally approved by stockholders in May 2012 and was amended effective March 8, 2016 to increase the number of shares of common stock authorized for issuance and make certain other changes to the Plan. As of June 30, 2016, 548,079 shares of common stock were available 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. The amount of tax benefit related to the exercise, vesting, and forfeiture of equity-based awards reflected in additional paid-in-capital, not taxes payable, was $1.1 million and $ 651,000 during the six months ended June 30, 2016 and 2015 , respectively. Restricted Stock Units The Plan permits the Compensation Committee to grant restricted stock units ("RSUs"). In the first quarter of 2016, the Compensation Committee granted time-based RSUs with respect to 72,644 shares of common stock, and in the first quarter of 2015, the Compensation Committee granted time-based RSUs with respect to 78,220 shares of common stock to selected officers. The time-based RSUs represent the right, without payment, to receive shares of Heartland common stock at a specified date in the future. The time-based RSUs granted in 2016 vest over three years in equal installments on the first, second and third anniversaries of the grant date. The time-based RSUs granted in 2015 vest over five years in equal installments on the third, fourth, and fifth anniversaries of the grant date. The time-based RSUs will be settled in common stock upon vesting, and will not be entitled to dividends until vested. The time-based RSUs may also vest upon death or disability, upon a change in control or upon a "qualified retirement" (as defined in the RSU agreement). The retiree is required to sign a non-solicitation and non-compete agreement as a condition to vesting. In addition to the time-based RSUs referenced in the preceding paragraph, the Compensation Committee granted performance-based RSUs with respect to 35,516 shares of common stock in the first quarter of 2016, and 39,075 shares of common stock in the first quarter of 2015. These performance-based RSUs are earned based on satisfaction of performance targets for the fiscal years ended December 31, 2016, and December 31, 2015, respectively, and then fully vest two years after the end of the performance period. For the grants awarded in 2016, the portion of the RSUs earned based on performance vests on December 31, 2018, and for the grants awarded in 2015, the portion of the RSUs earned based on performance vests on December 31, 2017, subject to employment on the respective vesting dates. The performance-based RSUs vest to the extent that they are earned upon death or disability, upon a change in control or upon a "qualified retirement." The Compensation Committee also granted performance-based RSUs with respect to 11,408 shares of common stock in the first quarter of 2016. These performance-based RSUs will be earned based on satisfaction of performance targets for the three -year performance period ended December 31, 2018. These performance-based RSUs will vest in 2019 after measurement of performance in relation to the performance targets. Upon death, disability, or a "qualified retirement," all performance-based RSUs granted in 2016 remain outstanding and are earned based on actual performance at the end of each performance period. All RSUs granted on or after March 8, 2016, become fully vested upon a change in control if (1) they are not assumed by the successor corporation or (2) upon an involuntary termination of the participant's employment within two years after the change in control. The Compensation Committee also grants RSUs under the Plan to directors as part of their compensation, to new management level employees at commencement of employment, and to other employees and service providers as incentives. During the six months ended June 30, 2016 , and June 30, 2015 , 22,153 and 22,648 RSUs, respectively, were granted to directors and new employees. A summary of the RSUs outstanding as of June 30, 2016 and 2015 , and changes during the six months ended June 30, 2016 and 2015 , follows: 2016 2015 Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 353,195 $ 25.53 396,555 $ 21.48 Granted 141,721 29.79 139,943 28.90 Vested (117,898 ) 23.40 (151,681 ) 17.98 Forfeited (10,892 ) 27.13 (11,198 ) 25.14 Outstanding at June 30 366,126 $ 27.60 373,619 $ 25.55 Total compensation costs recorded for RSUs were $2.4 million and $1.9 million for the six month periods ended June 30, 2016 and 2015 . As of June 30, 2016 , there were $4.4 million of total unrecognized compensation costs related to the Plan for RSUs that are expected to be recognized through 2019. Options Although the Plan provides authority to the Compensation Committee to grant stock options, no options were granted during the first six months of 2016 and 2015 . 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 equal portions of a grant becoming exercisable at three years, four years, and five years after the date of grant. A summary of the stock options outstanding as of June 30, 2016 and 2015 , and changes during the six months ended June 30, 2016 and 2015 , follows: 2016 2015 Shares Weighted-Average Exercise Price Shares Weighted-Average Exercise Price Outstanding at January 1 125,950 $ 24.08 215,851 $ 23.85 Granted — — — — Exercised (35,000 ) 23.53 (56,650 ) 22.85 Forfeited (1,500 ) 21.10 (2,250 ) 23.88 Outstanding at June 30 89,450 $ 24.34 156,951 $ 24.18 Options exercisable at June 30 89,450 $ 24.34 156,951 $ 24.18 At June 30, 2016 , the vested options totale d 89,450 shares with a weighted average exercise price of $ 24.34 per share and a weighted average remaining contractual life of 1.03 years. The intrinsic value (the difference between the market price and the aggregate exercise price) for the vested options as of June 30, 2016 , was $979,000 . The intrinsic value for the total of all options exercised during the six months ended June 30, 2016 , was $295,000 . 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 was $ 824,000 for the six months ended June 30, 2016 , and $1.3 million for the six months ended June 30, 2015 . Total compensation costs recorded for options were $0 for both the six month periods ended June 30, 2016 and 2015 . There are no unrecorded compensation costs related to options at June 30, 2016 . No stock options vested during the six -month periods ended June 30, 2016 and 2015 . Subsequent Events On July 29, 2016, Heartland filed a universal shelf registration statement with the SEC to register debt or equity securities. The registration statement, which was effective immediately, provides Heartland with the ability to raise capital, subject to market conditions and SEC rules and limitations, if Heartland's board of directors decides to do so. Effect of New Financial Accounting Standards In May 2014, the FASB issued ASU 2014-09, " Revenue from Contracts with Customers ." The amendment clarifies the principles for recognizing revenue and develops a common revenue standard. The amendment outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” In applying the revenue model to contracts within its scope, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The amendment applies to all contracts with customers except those that are within the scope of other topics in the FASB Codification. The standard also requires significantly expanded disclosures about revenue recognition. The amendment is effective for annual reporting periods beginning after December 15, 2017 (including interim reporting periods within those periods). Early application is not permitted. Heartland intends to adopt the accounting standard during the first quarter of 2018, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In November 2014, the FASB issued ASU 2014-16, " Derivatives and Hedging (Topic 815): Determining Whether a Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity." The amendment clarifies how current guidance should be interpreted in evaluating the characteristics and risks of a host contract in a hybrid financial instrument issued in the form of a share. One criterion requires evaluating whether the nature of the host contract is more akin to debt or to equity and whether the economic characteristics and risks of the embedded derivative feature are "clearly and closely related" to the host contract. In making that evaluation, an issuer or investor must consider all terms and features in a hybrid financial instrument including the embedded derivative feature that is being evaluated for separate accounting or may consider all terms and features in the hybrid financial instrument except for the embedded derivative feature that is being evaluated for separate accounting. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015, with early adoption permitted. Heartland adopted this standard on January 1, 2016, and the adoption of this standard did not have a material impact on its results of operations, financial position, and liquidity. In January 2015, the FASB issued ASU 2015-01, " Income Statement-Extraordinary and Unusual Items ." The amendment eliminates from U.S. GAAP the concept of extraordinary items. Presently, an event or transaction is presumed to be an ordinary and usual activity of the reporting entity unless evidence clearly supports its classification as an extraordinary item. If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. This amended guidance will prohibit separate disclosure of extraordinary items in the income statement. This amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Entities may apply the amendment prospectively or retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Heartland adopted this standard on January 1, 2016, and the adoption of this standard did not have a material impact on the results of operations, financial position, and liquidity. In April 2015, the FASB issued ASU 2015-05, "Intangibles-Goodwill and Other-Internal-Use Software." The amendment intends to provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance will not change GAAP for a customer's accounting for service contracts. As a result, all software licenses within the scope of this guidance will be accounted for consistently with other licenses of intangible assets. This amendment is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Entities can elect to adopt the standard either retrospectively or prospectively to all cloud computing arrangements entered into or materially modified after the adoption date. Early adoption is permitted. Heartland adopted this standard on January 1, 2016 and the adoption did not have a material impact on the results of operations, financial position, and liquidity. In September 2015, the FASB issued ASU 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments." The amendment eliminates the requirement of Topic 805, Business Combinations, to retrospectively adjust the financial statements for measurement-period adjustments that occur in periods after a business combination is consummated. Measurement-period adjustments are calculated as if they were known at the acquisition date, but are recognized in the reporting period in which they are determined. Prior period information is not revised. Additional disclosures are required about the impact on current period income statement line items of adjustments that would have been recognized in prior periods if prior period information had been revised. This amendment is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted if financial statements have not been issued. Heartland adopted this standard effective September 30, 2015. The adoption of this standard did not have a material impact on the results of operations, financial position, and liquidity. In January 2016, the FASB issued guidance ASU 2016-01, " Recognition and Measurement of Financial Assets and Financial Liabilitie s." The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: (1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (5) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; (7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except for the early application of the amendment noted in item (5) above, early adoption of the amendments in this update is not permitted. Heartland intends to adopt the accounting standard in 2018, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In February 2016, the FASB issued ASU 2016-02, " Leases (Topic 842)." Topic 842 requires a lessee to recognize a lease liability and a right of use asset for each lease, with the exception of short term leases, at the commencement date of the lease and disclose key information about the leasing arrangement. Accounting requirements applied by lessors is largely unchanged. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and will be applied on a modified retrospective basis. Heartland intends to adopt the accounting standard in 2019, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In March 2016, the FASB issued ASU 2016-09, "Compensation-Stock Compensation (Topic 718)." The amendments in this ASU simplify several aspects of the accounting for share-based payments, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendments in this ASU are effective for annual periods beginning after December 15, 2016 and interim periods within those annual periods. Early adoption is permitted for any interim or annual period prior to the effective date. An entity that elects early adoption must adopt all of the amendments in the same period. Heartland intends to adopt this ASU in 2017, as required, and believes the adoption will not have an impact on its results of operations, financial position, and liquidity. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)." The amendments in this ASU require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The amendments in this ASU indicate that an entity should not use the length of time a security has been in an unrealized loss position to avoid recording a credit loss. In addition, in determining whether a credit loss exists, the amendments in this ASU also remove the requirements to consider the historical and implied volatility of the fair value of a security and recoveries or declines in fair value after the balance sheet date. The amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. An entity may adopt the amendments earlier as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Heartland intends to adopt the accounting standard in 2020, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS CIC Bancshares, Inc. On February 5, 2016, Heartland completed the acquisition of CIC Bancshares, Inc., parent company of Centennial Bank, headquartered in Denver, Colorado. The purchase price was approximately $76.9 million , which was paid by delivery of 2,003,235 shares of Heartland common stock and cash of $15.7 million . In addition, Heartland issued a new series of convertible preferred stock with a fair value of $3.8 million and assumed convertible notes and subordinated debt totaling approximately $7.9 million . Simultaneous with the closing of the transaction, Centennial Bank merged into Heartland's Summit Bank & Trust, with the resulting institution operating under the name, Centennial Bank and Trust. As of the close date, the transaction included, at fair value, total assets of $772.6 million , total loans of $581.5 million , and total deposits of $648.1 million . The transaction was a tax-free reorganization with respect to the stock consideration received by the stockholders of CIC Bancshares, Inc. The assets and liabilities of CIC Bancshares, Inc. were recorded on the consolidated balance sheet at estimated fair value on the acquisition date. The following table represents, in thousands, the amounts recorded on the consolidated balance sheet as of February 5, 2016: As of February 5, 2016 Fair value of consideration paid: Common Stock (2,003,235 shares) $ 57,433 Preferred Stock (3,000 shares) 3,777 Cash 15,672 Total consideration paid 76,882 Fair value of assets acquired: Cash and due from banks 23,756 Securities: Securities available for sale 92,831 Other securities 3,486 Loans held to maturity 581,477 Premises, furniture and equipment, net 16,450 Other real estate, net 1,934 Other intangible assets, net 6,576 Other assets 16,276 Total assets 742,786 Fair value of liabilities assumed: Deposits 648,111 Short term borrowings 35,766 Other borrowings 7,924 Other liabilities 3,951 Total liabilities assumed 695,752 Fair value of net assets acquired 47,034 Goodwill resulting from acquisition $ 29,848 Heartland recognized $29.8 million of goodwill in conjunction with the acquisition of CIC Bancshares, Inc., which is calculated as the excess of both the consideration exchanged and the liabilities assumed as compared to the fair value of identifiable assets acquired. Goodwill resulted from the expected operational synergies, enhanced market area, cross-selling opportunities and expanded business lines. See Note 6 for further information on goodwill. Pro Forma Information (unaudited) : The following pro forma information presents the results of operations for the years ended December 31, 2015, and December 31, 2014, as if the CIC Bancshares, Inc. acquisition occurred on January 1, 2014: (Dollars in thousands, except per share data), unaudited For the Years Ended December 31, 2015 December 31, 2014 Net interest income $ 259,531 $ 221,808 Net income available to common shareholders $ 59,491 $ 41,004 Basic earnings per share $ 2.63 $ 2.00 Diluted earnings per share $ 2.58 $ 1.96 The above pro forma results are presented for illustrative purposes and are not intended to represent or be indicative of the actual results of operations of the merged companies that would have been achieved had the acquisition occurred at January 1, 2014, nor are they intended to represent or be indicative of future results of operations. The pro forma results do not include expected operating cost savings as a result of the acquisition. These pro forma results require significant estimates and judgments particularly with respect to valuation and accretion of income associated with the acquired loans. Heartland incurred $551,000 of pre-tax merger related expenses in 2016 associated with the Centennial Bank acquisition. The merger expenses are reflected on the consolidated statements of income for the applicable period and are reported primarily in the categories of professional fees and other noninterest expenses. Acquired loans were preliminarily recorded at fair value based on a discounted cash flow valuation methodology that considers, among other things, projected default rates, loss given defaults and recovery rates. No allowance for credit losses was carried over from the acquisition. The balance of nonaccrual loans on the acquisition date was $1.6 million . Premier Valley Bank On November 30, 2015, Heartland completed the purchase of Premier Valley Bank in Fresno, California. The purchase price was approximately $95.5 million , which was paid by delivery of 1,758,543 shares of Heartland common stock and cash of $28.5 million . The transaction included, at fair value, total assets of $692.7 million , loans of $389.8 million , and deposits of $622.7 million . Premier Valley Bank continues to operate under its current name and management team as Heartland's tenth, wholly-owned state-chartered bank. The transaction was a tax-free reorganization with respect to the stock consideration received by the stockholders of Premier Valley Bank. Heartland recognized $41.0 million of goodwill in conjunction with the acquisition of Premier Valley Bank, which is calculated as the excess of both the consideration exchanged and the liabilities assumed as compared to the fair value of identifiable assets acquired. Goodwill resulted from the expected operational synergies, enhanced market area, cross-selling opportunities and expanded business lines. See Note 6 for further information on goodwill. First Scottsdale Bank, N.A. On September 11, 2015, Heartland completed the purchase of First Scottsdale Bank, N.A., in Scottsdale, Arizona, in an all cash transaction valued at approximately $17.7 million . Simultaneous with the closing of the transaction, First Scottsdale Bank, N.A., merged into Heartland's Arizona Bank & Trust subsidiary. The transaction included, at fair value, total assets of $81.2 million , loans of $54.7 million , and deposits of $65.9 million on the acquisition date. Community Bancorporation of New Mexico, Inc. On August 21, 2015, Heartland acquired Community Bancorporation of New Mexico, Inc., parent company of Community Bank in Santa Fe, New Mexico, in an all cash transaction valued at approximately $11.1 million . Simultaneous with the closing of the transaction, Community Bank merged into Heartland's New Mexico Bank & Trust subsidiary. The transaction included, at fair value, total assets of $166.3 million , loans of $99.5 million , and deposits of $147.4 million on the acquisition date. Also included in this transaction is one bank building with a fair value of $3.4 million that Heartland intends to sell. The bank building is part of the balance of premises, furniture and equipment held for sale on the consolidated balance sheet. Community Banc-Corp of Sheboygan, Inc. On January 16, 2015, Heartland completed the acquisition of Community Banc-Corp of Sheboygan, Inc., parent company of Community Bank & Trust in Sheboygan, Wisconsin. Under the terms of the merger agreement for this transaction, the aggregate purchase price was based upon 155% of the December 31, 2014, adjusted tangible book value, as defined in the merger agreement, of Community Banc-Corp of Sheboygan, Inc. The purchase price was approximately $ 53.1 million, which was paid by delivery of 1,970,720 shares of Heartland common stock. The transaction included, at fair value, total assets of $506.8 million , including loans of $395.0 million , and deposits of $433.9 million . Simultaneous with the close of the transaction, Community Bank & Trust merged into Heartland’s Wisconsin Bank & Trust subsidiary. The transaction was a tax-free reorganization with respect to the stock consideration received by the stockholders of Community Banc-Corp of Sheboygan, Inc. Heartland recognized goodwill of $18.6 million in conjunction with the acquisition of Community Banc-Corp of Sheboygan, Inc., which is calculated as the excess of both the consideration exchanged and the liabilities assumed as compared to the fair value of identifiable assets acquired. See Note 6 for further information on goodwill.

Securities

Securities	6 Months Ended
	Jun. 30, 2016
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 June 30, 2016 , and December 31, 2015 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value June 30, 2016 U.S. government corporations and agencies $ 4,943 $ 158 $ — $ 5,101 Mortgage-backed securities 1,226,085 13,776 (19,129 ) 1,220,732 Obligations of states and political subdivisions 311,883 14,583 (44 ) 326,422 Corporate debt securities 815 15 — 830 Total debt securities 1,543,726 28,532 (19,173 ) 1,553,085 Equity securities 13,158 349 — 13,507 Total $ 1,556,884 $ 28,881 $ (19,173 ) $ 1,566,592 December 31, 2015 U.S. government corporations and agencies $ 25,847 $ 22 $ (103 ) $ 25,766 Mortgage-backed securities 1,254,452 9,134 (20,884 ) 1,242,702 Obligations of states and political subdivisions 290,522 6,547 (1,087 ) 295,982 Corporate debt securities 740 106 — 846 Total debt securities 1,571,561 15,809 (22,074 ) 1,565,296 Equity securities 13,142 40 (44 ) 13,138 Total $ 1,584,703 $ 15,849 $ (22,118 ) $ 1,578,434 At June 30, 2016 , and December 31, 2015 , the amortized cost of the available for sale securities is net of $0 and $237,000 of credit related other-than-temporary impairment ("OTTI"), respectively. The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of June 30, 2016 , and December 31, 2015 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value June 30, 2016 Mortgage-backed securities $ — $ — $ — $ — Obligations of states and political subdivisions 270,423 22,717 (286 ) 292,854 Total $ 270,423 $ 22,717 $ (286 ) $ 292,854 December 31, 2015 Mortgage-backed securities $ 4,369 $ 306 $ — $ 4,675 Obligations of states and political subdivisions 274,748 15,595 (505 ) 289,838 Total $ 279,117 $ 15,901 $ (505 ) $ 294,513 At June 30, 2016 , the amortized cost of the held to maturity securities is net of $ 0 of credit related OTTI and $ 0 of non-credit related OTTI. At December 31, 2015 , the amortized cost of the held to maturity securities was net of $ 1.5 million of credit related OTTI and $ 40,000 of non-credit related OTTI. Approximately 77% 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 June 30, 2016 , 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 $ 1,645 $ 1,653 Due in 1 to 5 years 15,892 16,181 Due in 5 to 10 years 87,334 90,004 Due after 10 years 212,770 224,515 Total debt securities 317,641 332,353 Mortgage-backed securities 1,226,085 1,220,732 Equity securities 13,158 13,507 Total investment securities $ 1,556,884 $ 1,566,592 The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2016 , 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 $ 4,380 $ 4,448 Due in 1 to 5 years 14,327 15,170 Due in 5 to 10 years 87,072 92,495 Due after 10 years 164,644 180,741 Total debt securities 270,423 292,854 Mortgage-backed securities — — Total investment securities $ 270,423 $ 292,854 As of June 30, 2016 and December 31, 2015 , securities with a fair value of $843.0 million and $855.8 million , respectively, were pledged to secure public and trust deposits, short-term borrowings and for other purposes as required by law. Gross gains and losses realized related to the sales of securities available for sale for the three- and six -month periods ended June 30, 2016 and 2015 , are summarized as follows, in thousands: Three Months Ended Six Months Ended 2016 2015 2016 2015 Proceeds from sales $ 318,927 $ 270,688 $ 622,375 $ 526,026 Gross security gains 5,095 3,819 9,653 8,441 Gross security losses 473 709 1,155 978 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 June 30, 2016 , and December 31, 2015 . 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 w as June 30, 2015, and December 31, 2014 , 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 Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2016 U.S. government corporations and agencies $ — $ — $ — $ — $ — $ — Mortgage-backed securities 517,699 (14,569 ) 144,275 (4,560 ) 661,974 (19,129 ) Obligations of states and political subdivisions 2,236 (43 ) 255 (1 ) 2,491 (44 ) Corporate debt securities — — — — — — Total debt securities 519,935 (14,612 ) 144,530 (4,561 ) 664,465 (19,173 ) Equity securities — — — — — — Total temporarily impaired securities $ 519,935 $ (14,612 ) $ 144,530 $ (4,561 ) $ 664,465 $ (19,173 ) December 31, 2015 U.S. government corporations and agencies $ 22,359 $ (103 ) $ — $ — $ 22,359 $ (103 ) Mortgage-backed securities 724,330 (15,523 ) 139,562 (5,361 ) 863,892 (20,884 ) Obligations of states and political subdivisions 68,482 (896 ) 7,460 (191 ) 75,942 (1,087 ) Corporate debt securities — — — — — — Total debt securities 815,171 (16,522 ) 147,022 (5,552 ) 962,193 (22,074 ) Equity securities 6,566 (44 ) — — 6,566 (44 ) Total temporarily impaired securities $ 821,737 $ (16,566 ) $ 147,022 $ (5,552 ) $ 968,759 $ (22,118 ) Securities held to maturity Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2016 Obligations of states and political subdivisions 1,388 (3 ) 1,131 (283 ) 2,519 (286 ) Total temporarily impaired securities $ 1,388 $ (3 ) $ 1,131 $ (283 ) $ 2,519 $ (286 ) December 31, 2015 Obligations of states and political subdivisions 3,646 (12 ) 18,033 (493 ) 21,679 (505 ) Total temporarily impaired securities $ 3,646 $ (12 ) $ 18,033 $ (493 ) $ 21,679 $ (505 ) 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. Heartland previously recorded $981,000 of OTTI on three private label mortgage-backed securities 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. During 2015, Heartland recorded additional credit-related OTTI on two of the private label mortgage-backed securities that previously had OTTI credit losses. 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, $769,000 of OTTI attributable to credit-related losses was recorded in December 2015. The credit-related OTTI was $716,000 , of which $200,000 was reclassified from previous non-credit related OTTI in the held to maturity category. Credit-related OTTI was $53,000 in the available for sale category. In the first quarter of 2016, Heartland sold the mortgage-backed securities in the held to maturity portfolio because the credit quality of the securities showed further deterioration, and it was unlikely Heartland would recover the remaining basis of the securities prior to maturity. The significant deterioration of the credit quality of these securities was inconsistent with Heartland's original intent upon purchase and classification of these held to maturity securities. The carrying value of these securities was $4.4 million , and the associated realized gross gains were $89,000 , and the realized gross losses were $439,000 . 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. The losses are 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 published credit ratings of these securities and the stability of the underlying municipalities. Because the decline in fair value is attributable to changes in interest rates or widening market spreads due to insurance company downgrades 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 and no gross realized losses on the sale of available for sale securities with OTTI write-downs for the period ended June 30, 2016 . Additionally, there were no gross realized gains and no gross realized losses on the sale of held to maturity securities with OTTI write-downs for the period ended June 30, 2016 . There were no gross realized gains or losses on the sale of available for sale or held to maturity securities with OTTI write-downs for the period ended June 30, 2015 . 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 Six Months Ended 2016 2015 2016 2015 Recorded as part of gross realized losses: Credit related OTTI $ — $ — $ — $ — Intent to sell OTTI — — — — Total recorded as part of gross realized losses — — — — Recorded directly to AOCI for non-credit related impairment: Residential mortgage backed securities — — — — Reduction of non-credit related impairment related to security sales — — (120 ) — Accretion of non-credit related impairment — (24 ) (7 ) (48 ) Total changes to AOCI for non-credit related impairment — (24 ) (127 ) (48 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (24 ) $ (127 ) $ (48 ) Included in other securities at June 30, 2016 , and December 31, 2015 , were shares of stock in each Federal Home Loan Bank (the "FHLB") of Des Moines, Chicago, Dallas, San Francisco and Topeka at an amortized cost of $ 15.5 million and $ 14.3 million , respectively.

Loans and Leases

Loans and Leases	6 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Loans and Leases	LOANS AND LEASES Loans and leases as of June 30, 2016 , and December 31, 2015 , were as follows, in thousands: June 30, 2016 December 31, 2015 Loans and leases receivable held to maturity: Commercial $ 1,287,301 $ 1,279,214 Commercial real estate 2,643,578 2,326,360 Agricultural and agricultural real estate 480,883 471,870 Residential real estate 644,267 539,555 Consumer 428,730 386,867 Gross loans and leases receivable held to maturity 5,484,759 5,003,866 Unearned discount (686 ) (488 ) Deferred loan fees (1,815 ) (1,892 ) Total net loans and leases receivable held to maturity 5,482,258 5,001,486 Allowance for loan and lease losses (51,756 ) (48,685 ) Loans and leases receivable, net $ 5,430,502 $ 4,952,801 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, 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 the discounted 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 U.S. Department of Agriculture's 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. As of June 30, 2016 , Heartland had $2.4 million of loans secured by residential real estate property that were in the process of foreclosure. 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 subsidiaries, Citizens Finance Co. and Citizens Finance of Illinois Co., typically lend to borrowers with past credit problems or limited credit histories, and these loans comprise approximately 19% 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, impairment is measured 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 June 30, 2016 , and December 31, 2015 , 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 2016. Allowance For Loan and Lease Losses Gross Loans and Leases Receivable Held to Maturity Ending Balance Under ASC 310-10-35 Ending Balance Under ASC 450-20 Total Ending Balance Evaluated for Impairment Under ASC 310-10-35 Ending Balance Evaluated for Impairment Under ASC 450-20 Total June 30, 2016 Commercial $ 1,342 $ 14,183 $ 15,525 $ 7,985 $ 1,279,316 $ 1,287,301 Commercial real estate 2,780 20,188 22,968 53,481 2,590,097 2,643,578 Agricultural and agricultural real estate 6 4,094 4,100 14,359 466,524 480,883 Residential real estate 446 1,619 2,065 21,710 622,557 644,267 Consumer 1,351 5,747 7,098 5,708 423,022 428,730 Total $ 5,925 $ 45,831 $ 51,756 $ 103,243 $ 5,381,516 $ 5,484,759 December 31, 2015 Commercial $ 471 $ 15,624 $ 16,095 $ 6,919 $ 1,272,295 $ 1,279,214 Commercial real estate 698 18,834 19,532 45,442 2,280,918 2,326,360 Agricultural and agricultural real estate — 3,887 3,887 4,612 467,258 471,870 Residential real estate 393 1,541 1,934 17,790 521,765 539,555 Consumer 1,206 6,031 7,237 5,458 381,409 386,867 Total $ 2,768 $ 45,917 $ 48,685 $ 80,221 $ 4,923,645 $ 5,003,866 The following table presents nonaccrual loans, accruing loans past due 90 days or more and troubled debt restructured loans at June 30, 2016 , and December 31, 2015 , in thousands. There were no nonaccrual leases, accruing leases past due 90 days or more or restructured leases at June 30, 2016 , and December 31, 2015 . June 30, 2016 December 31, 2015 Nonaccrual loans $ 55,732 $ 37,874 Nonaccrual troubled debt restructured loans 1,321 1,781 Total nonaccrual loans $ 57,053 $ 39,655 Accruing loans past due 90 days or more $ — $ — Performing troubled debt restructured loans $ 9,923 $ 11,075 The following table provides information on troubled debt restructured loans that were modified during the three- and six -month periods ended June 30, 2016 , and June 30, 2015 , dollars in thousands: Three Months Ended 2016 2015 Number Pre- Post- Number Pre- Post- Commercial 1 $ 100 $ 100 1 $ 830 $ 830 Commercial real estate 1 179 179 — — — Total commercial and commercial real estate 2 279 279 1 830 830 Agricultural and agricultural real estate — — — 1 311 311 Residential real estate — — — — — — Consumer — — — — — — Total 2 $ 279 $ 279 2 $ 1,141 $ 1,141 Six Months Ended 2016 2015 Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Commercial 1 $ 100 $ 100 1 $ 830 $ 830 Commercial real estate 1 179 179 1 3,992 3,992 Total commercial and commercial real estate 2 279 279 2 4,822 4,822 Agricultural and agricultural real estate — — — 1 311 311 Residential real estate — — — — — — Consumer — — — — — — Total 2 $ 279 $ 279 3 $ 5,133 $ 5,133 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. At June 30, 2016 , there were no commitments to extend credit to any of the borrowers with an existing troubled debt restructuring. The following tables presents troubled debt restructured loans for which there was a payment default during the three and six months ended June 30, 2016 , and June 30, 2015 , that had been modified during the twelve-month period prior to default. With Payment Defaults During the Following Periods Three Months Ended 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 100 — $ — Commercial real estate — — — — Total commercial and commercial real estate 1 100 — — Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 100 — $ — With Payment Defaults During the Following Periods Six Months Ended June 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 100 — $ — Commercial real estate — — — — Total commercial and commercial real estate 1 100 — — Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 100 — $ — 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 the borrower's 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 the exact status can be determined. The "loss" rating is assigned to loans considered uncollectible. As of June 30, 2016 , Heartland had no loans 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 by credit quality indicator at June 30, 2016 , and December 31, 2015 , in thousands: Pass Nonpass Total June 30, 2016 Commercial $ 1,154,318 $ 132,983 $ 1,287,301 Commercial real estate 2,438,572 205,006 2,643,578 Total commercial and commercial real estate 3,592,890 337,989 3,930,879 Agricultural and agricultural real estate 431,671 49,212 480,883 Residential real estate 615,626 28,641 644,267 Consumer 418,251 10,479 428,730 Total gross loans and leases receivable held to maturity $ 5,058,438 $ 426,321 $ 5,484,759 December 31, 2015 Commercial $ 1,106,276 $ 172,938 $ 1,279,214 Commercial real estate 2,107,474 218,886 2,326,360 Total commercial and commercial real estate 3,213,750 391,824 3,605,574 Agricultural and agricultural real estate 435,745 36,125 471,870 Residential real estate 515,195 24,360 539,555 Consumer 377,173 9,694 386,867 Total gross loans and leases receivable held to maturity $ 4,541,863 $ 462,003 $ 5,003,866 The nonpass category in the table above is comprised of approximately 57% special mention loans and 43% substandard loans as of June 30, 2016 . The percent of nonpass loans on nonaccrual status as of June 30, 2016 , was 13% . As of December 31, 2015 , the nonpass category in the table above was comprised of approximately 68% special mention loans and 32% substandard loans. The percent of nonpass loans on nonaccrual status as of December 31, 2015 , was 8% . Loans delinquent 30 to 89 days as a percent of total loans were 0.73% at June 30, 2016 , compared to 0 .31% at December 31, 2015 . 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 at June 30, 2016 , and December 31, 2015 , in thousands: Accruing Loans and Leases 30-59 Days Past Due 60-89 Days 90 Days or More Past Due Total Past Due Current Nonaccrual Total Loans and Leases June 30, 2016 Commercial $ 1,714 $ 823 $ — $ 2,537 $ 1,279,293 $ 5,471 $ 1,287,301 Commercial real estate 17,469 12,058 — 29,527 2,595,224 18,827 2,643,578 Total commercial and commercial real estate 19,183 12,881 — 32,064 3,874,517 24,298 3,930,879 Agricultural and agricultural real estate 1,108 133 — 1,241 468,819 10,823 480,883 Residential real estate 1,554 17 — 1,571 624,327 18,369 644,267 Consumer 4,058 949 — 5,007 420,160 3,563 428,730 Total gross loans and leases receivable held to maturity $ 25,903 $ 13,980 $ — $ 39,883 $ 5,387,823 $ 57,053 $ 5,484,759 December 31, 2015 Commercial $ 2,005 $ 608 $ — $ 2,613 $ 1,273,678 $ 2,923 $ 1,279,214 Commercial real estate 3,549 2,077 — 5,626 2,302,052 18,682 2,326,360 Total commercial and commercial real estate 5,554 2,685 — 8,239 3,575,730 21,605 3,605,574 Agricultural and agricultural real estate 143 54 — 197 470,455 1,218 471,870 Residential real estate 1,900 115 — 2,015 523,915 13,625 539,555 Consumer 3,964 933 — 4,897 378,763 3,207 386,867 Total gross loans and leases receivable held to maturity $ 11,561 $ 3,787 $ — $ 15,348 $ 4,948,863 $ 39,655 $ 5,003,866 The majority of Heartland's impaired loans are those that are nonaccrual or have had their terms restructured in a troubled debt restructuring. The following tables present, by category of loan, impaired loans, the unpaid contractual loan balances at June 30, 2016 , and December 31, 2015 ; the outstanding loan balances recorded on the consolidated balance sheets at June 30, 2016 , and December 31, 2015 ; any related allowance recorded for those loans as of June 30, 2016 , and December 31, 2015 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three and six months ended June 30, 2016 , and year ended December 31, 2015 ; and the interest income recognized on the impaired loans during the three and six months ended June 30, 2016 , and year ended December 31, 2015 , in thousands: Unpaid Contractual Balance Loan Balance Related Allowance Recorded Quarter- to- Date Avg. Loan Balance Quarter- to- Date Interest Income Recognized Year- to- Date Avg. Loan Balance Year- to- Date Interest Income Recognized June 30, 2016 Impaired loans with a related allowance: Commercial $ 2,664 $ 2,664 $ 1,342 $ 3,598 $ 8 $ 2,857 $ 14 Commercial real estate 16,106 16,106 2,780 7,823 208 6,037 213 Total commercial and commercial real estate 18,770 18,770 4,122 11,421 216 8,894 227 Agricultural and agricultural real estate 111 111 6 36 — 18 — Residential real estate 3,792 3,706 446 3,351 3 3,127 7 Consumer 3,185 3,185 1,351 3,359 6 3,277 15 Total impaired loans with a related allowance $ 25,858 $ 25,772 $ 5,925 $ 18,167 $ 225 $ 15,316 $ 249 Impaired loans without a related allowance: Commercial $ 5,332 $ 5,321 $ — $ 4,709 $ 91 $ 7,281 $ 261 Commercial real estate 38,783 37,375 — 38,928 380 42,830 785 Total commercial and commercial real estate 44,115 42,696 — 43,637 471 50,111 1,046 Agricultural and agricultural real estate 14,248 14,248 — 14,031 — 10,700 94 Residential real estate 18,137 18,004 — 17,050 49 17,082 81 Consumer 2,538 2,523 — 2,337 11 2,651 20 Total impaired loans without a related allowance $ 79,038 $ 77,471 $ — $ 77,055 $ 531 $ 80,544 $ 1,241 Total impaired loans held to maturity: Commercial $ 7,996 $ 7,985 $ 1,342 $ 8,307 $ 99 $ 10,138 $ 275 Commercial real estate 54,889 53,481 2,780 46,751 588 48,867 998 Total commercial and commercial real estate 62,885 61,466 4,122 55,058 687 59,005 1,273 Agricultural and agricultural real estate 14,359 14,359 6 14,067 — 10,718 94 Residential real estate 21,929 21,710 446 20,401 52 20,209 88 Consumer 5,723 5,708 1,351 5,696 17 5,928 35 Total impaired loans held to maturity $ 104,896 $ 103,243 $ 5,925 $ 95,222 $ 756 $ 95,860 $ 1,490 Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year-to- Date Avg. Loan Balance Year-to- Date Interest Income Recognized December 31, 2015 Impaired loans with a related allowance: Commercial $ 1,192 $ 1,160 $ 471 $ 524 $ 12 Commercial real estate 2,697 2,697 698 2,539 19 Total commercial and commercial real estate 3,889 3,857 1,169 3,063 31 Agricultural and agricultural real estate — — — 2,823 — Residential real estate 2,210 2,125 393 2,524 16 Consumer 3,111 3,111 1,206 2,877 33 Total impaired loans with a related allowance $ 9,210 $ 9,093 $ 2,768 $ 11,287 $ 80 Impaired loans without a related allowance: Commercial $ 5,784 $ 5,759 $ — $ 7,511 $ 515 Commercial real estate 46,099 42,745 — 38,444 1,395 Total commercial and commercial real estate 51,883 48,504 — 45,955 1,910 Agricultural and agricultural real estate 4,612 4,612 — 2,287 175 Residential real estate 15,802 15,665 — 10,186 145 Consumer 2,347 2,347 — 2,403 38 Total impaired loans without a related allowance $ 74,644 $ 71,128 $ — $ 60,831 $ 2,268 Total impaired loans held to maturity: Commercial $ 6,976 $ 6,919 $ 471 $ 8,035 $ 527 Commercial real estate 48,796 45,442 698 40,983 1,414 Total commercial and commercial real estate 55,772 52,361 1,169 49,018 1,941 Agricultural and agricultural real estate 4,612 4,612 — 5,110 175 Residential real estate 18,012 17,790 393 12,710 161 Consumer 5,458 5,458 1,206 5,280 71 Total impaired loans held to maturity $ 83,854 $ 80,221 $ 2,768 $ 72,118 $ 2,348 On February 5, 2016, Heartland acquired CIC Bancshares, Inc., parent company of Centennial Bank, in Denver, Colorado. As of February 5, 2016, Centennial Bank had loans of $ 594.9 million , and the estimated fair value of the loans acquired was $ 581.5 million . On November 30, 2015, Heartland acquired Premier Valley Bank in Fresno, California. As of November 30, 2015, Premier Valley Bank had loans of $ 400.5 million , and the estimated fair value of the loans acquired was $ 389.8 million . On September 11, 2015, Heartland acquired First Scottsdale Bank, N.A. in Scottsdale, Arizona. As of September 11, 2015, First Scottsdale Bank, N.A. had loans of $56.5 million , and the estimated fair value of the loans acquired was $54.7 million . On August 21, 2015, Heartland acquired Community Bancorporation of New Mexico, Inc., parent company of Community Bank of Santa Fe, New Mexico. As of August 21, 2015, Community Bank had loans of $ 103.7 million , and the estimated fair value of the loans acquired was $ 99.5 million . On January 16, 2015, Heartland acquired Community Banc-Corp of Sheboygan, Inc., parent company of Community Bank & Trust in Sheboygan, Wisconsin. As of January 16, 2015, Community Bank & Trust had loans of $ 413.4 million , and the estimated fair value of the loans acquired was $ 395.0 million . The acquisitions of Community Banc-Corp of Sheboygan, Inc., Community Bancorporation of New Mexico, Inc., First Scottsdale Bank, N.A., Premier Valley Bank and CIC Bancshares, Inc. were accounted for under the acquisition method of accounting in accordance with ASC 805, “ Business Combinations. ” Purchased loans acquired in a business combination 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 when at the date of the acquisition, it is probable that Heartland will not collect all contractually required principal and interest payments. Evidence of credit quality deterioration at the purchase date includes 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 acquired loans at June 30, 2016 and December 31, 2015 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: June 30, 2016 December 31, 2015 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 3,261 $ 154,959 $ 158,220 $ — $ 159,393 $ 159,393 Commercial real estate 4,071 762,523 766,594 7,716 494,010 501,726 Agricultural and agricultural real estate — 771 771 — 2,985 2,985 Residential real estate 236 187,274 187,510 — 85,549 85,549 Consumer loans — 57,073 57,073 — 33,644 33,644 Total Loans $ 7,568 $ 1,162,600 $ 1,170,168 $ 7,716 $ 775,581 $ 783,297 Changes in accretable yield on acquired loans with evidence of credit deterioration at the date of acquisition for the three and six months ended June 30, 2016 , and June 30, 2015 , were as follows, in thousands: Balance at March 31, 2016 $ 305 Original yield discount, net, at date of acquisition — Accretion 193 Reclassification from nonaccretable difference (1) (56 ) Balance at June 30, 2016 $ 168 Balance at December 31, 2015 $ 557 Original yield discount, net, at date of acquisitions 19 Accretion 466 Reclassification from nonaccretable difference (1) (58 ) Balance at June 30, 2016 $ 168 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses. Balance at March 31, 2015 $ 352 Original yield discount, net, at date of acquisitions — Accretion 116 Reclassification from nonaccretable difference (1) (162 ) Balance at June 30, 2015 $ 398 Balance at December 31, 2014 $ — Original yield discount, net, at date of acquisitions 352 Accretion 116 Reclassification from nonaccretable difference (1) (162 ) Balance at June 30, 2015 $ 398 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses. On the acquisition dates, the preliminary estimate of the contractually required payments receivable for all loans with evidence of credit deterioration since origination was $21.0 million , and the estimated fair value of the loans was $13.1 million . At June 30, 2016 , 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. At June 30, 2016, there was an allowance for loan and lease losses of $ 472,000 related to these ASC 310-30 loans. On the acquisition dates, the preliminary estimate of the contractually required payments receivable for all nonimpaired loans acquired in the acquisitions was $1.55 billion , and the estimated fair value of the loans was $1.51 billion .

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	6 Months Ended
	Jun. 30, 2016
Loans and Leases Receivable, Allowance [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 and six months ended June 30, 2016 , and June 30, 2015 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at March 31, 2016 $ 16,374 $ 20,495 $ 4,028 $ 1,851 $ 6,990 $ 49,738 Charge-offs (249 ) (1,103 ) — (105 ) (1,494 ) (2,951 ) Recoveries 143 2,443 4 4 257 2,851 Provision (743 ) 1,133 68 315 1,345 2,118 Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2015 $ 16,095 $ 19,532 $ 3,887 $ 1,934 $ 7,237 $ 48,685 Charge-offs (347 ) (1,415 ) — (142 ) (2,652 ) (4,556 ) Recoveries 319 2,589 7 24 503 3,442 Provision (542 ) 2,262 206 249 2,010 4,185 Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at March 31, 2015 $ 11,688 $ 16,635 $ 3,216 $ 3,745 $ 6,570 $ 41,854 Charge-offs (682 ) (371 ) (275 ) (55 ) (1,351 ) (2,734 ) Recoveries 111 370 2 70 267 820 Provision 1,947 974 733 339 1,681 5,674 Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2014 $ 11,909 $ 15,898 $ 3,295 $ 3,741 $ 6,606 $ 41,449 Charge-offs (956 ) (704 ) (551 ) (113 ) (2,414 ) (4,738 ) Recoveries 431 496 24 107 500 1,558 Provision 1,680 1,918 908 364 2,475 7,345 Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614 Management allocates the allowance for loan and lease losses by pools of risk within each loan portfolio. The allocation of the allowance for loan and lease losses by loan portfolio is made for analytical purposes and is not necessarily indicative of the trend of future loan and lease losses in any particular category. The total allowance for loan and lease losses is available to absorb losses from any segment of the loan portfolio.

Goodwill, Core Deposit Premium

Goodwill, Core Deposit Premium and Other Intangible Assets	6 Months Ended
	Jun. 30, 2016
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 $ 127.7 million at June 30, 2016 , and $97.9 million at December 31, 2015 . Heartland conducts its annual internal assessment of the goodwill both collectively and at its subsidiaries as of September 30. Heartland recorded $ 29.8 million of goodwill in connection with the acquisition of CIC Bancshares, Inc., parent company of Centennial Bank, based in Denver, Colorado on February 5, 2016. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland recognized core deposit intangibles of $ 6.4 million that are expected to be amortized over a period of 10 years on an accelerated basis. The core deposit intangibles associated with this transaction are not deductible for tax purposes. In addition, Heartland recognized commercial servicing rights of $ 190,000 . Heartland recorded $41.0 million of goodwill in connection with the acquisition of Premier Valley Bank, based in Fresno, California on November 30, 2015. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland recognized core deposit intangibles of $8.0 million that are expected to be amortized over a period of 10 years on an accelerated basis. The core deposit intangibles associated with this transaction are not deductible for tax purposes. In addition, Heartland recognized commercial servicing rights of $616,000 . Heartland recorded $ 2.5 million of goodwill in connection with the acquisition of First Scottsdale Bank, N.A., based in Scottsdale, Arizona on September 11, 2015. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland also recognized core deposit intangibles of $ 357,000 that are expected to be amortized over a period of 10 years on an accelerated basis. The core deposit intangibles associated with this transaction are not deductible for tax purposes. Heartland recorded $ 213,000 of goodwill in connection with the acquisition of Community Bancorporation of New Mexico, Inc., parent company of Community Bank in Santa Fe, New Mexico, based in Santa Fe, New Mexico on August 21, 2015. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland also recognized core deposit intangibles of $ 1.7 million that are expected to be amortized over a period of 10 years on an accelerated basis. The core deposit intangibles associated with this transaction are not deductible for tax purposes. Heartland recorded $ 18.6 million of goodwill in connection with the acquisition of Community Banc-Corp of Sheboygan, Inc., the parent company of Community Bank & Trust, based in Sheboygan, Wisconsin on January 16, 2015. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland recognized core deposit intangibles of $ 6.0 million that are expected to be amortized over a period of 10 years on an accelerated basis. The core deposit intangibles associated with this transaction are not deductible for tax purposes. In addition, Heartland recognized commercial servicing rights of $ 4.3 million . Goodwill related to the CIC Bancshares, Inc., Premier Valley Bank, First Scottsdale Bank, N.A., Community Bancorporation of New Mexico, Inc. and Community Banc-Corp of Sheboygan, Inc., resulted from expected operational synergies, increased market presence, cross-selling opportunities, and expanded business lines. Other intangible assets consist of core deposit intangibles, mortgage servicing rights, customer relationship intangible, and commercial servicing rights. The gross carrying amount of other intangible assets and the associated accumulated amortization at June 30, 2016 , and December 31, 2015 , are presented in the table below, in thousands: June 30, 2016 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizing intangible assets: Core deposit intangibles $ 43,504 $ 18,632 $ 24,872 $ 37,118 $ 15,460 $ 21,658 Mortgage servicing rights 48,355 17,068 31,287 45,744 15,430 30,314 Customer relationship intangible 1,177 836 341 1,177 815 362 Commercial servicing rights 6,280 1,913 4,367 5,685 1,074 4,611 Total $ 99,316 $ 38,449 $ 60,867 $ 89,724 $ 32,779 $ 56,945 The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands: Core Deposit Intangibles Mortgage Servicing Rights Customer Relationship Intangible Commercial Servicing Rights Total Six months ending December 31, 2016 $ 2,460 $ 5,135 $ 20 $ 492 $ 8,107 Year ending December 31, 2017 4,419 6,538 40 951 11,948 2018 3,909 5,604 39 858 10,410 2019 3,426 4,670 37 694 8,827 2020 2,981 3,736 37 503 7,257 2021 2,463 2,802 36 429 5,730 Thereafter 5,214 2,802 132 440 8,588 Total $ 24,872 $ 31,287 $ 341 $ 4,367 $ 60,867 Projections of amortization expense for mortgage servicing rights are based on existing asset balances and the existing interest rate environment as of June 30, 2016 . Heartland's actual experience may be significantly different depending upon changes in mortgage interest rates and market conditions. Mortgage loans serviced for others were $4.20 billion and $ 4.06 billion as of June 30, 2016 , and December 31, 2015 , respectively. Custodial escrow balances maintained in connection with the mortgage loan servicing portfolio were approximately $23.6 million and $19.2 million as of June 30, 2016 and December 31, 2015 , respectively. The fair value of Heartland's mortgage servicing rights was estimated at $39.9 million at June 30, 2016 , and $40.9 million at December 31, 2015 . Heartland's mortgage servicing rights portfolio is comprised of loans serviced for the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association. The servicing rights portfolio is separated into 15 - and 30 -year tranches, and the servicing rights portfolio is an asset of one of Heartland's subsidiaries. The fair value of mortgage servicing rights is calculated based upon a discounted cash flow analysis. Cash flow assumptions, including prepayment speeds, servicing costs and escrow earnings are considered in the calculation. The average constant prepayment rate was 11.84% and 10.65% for the June 30, 2016 , and December 31, 2015 , valuations, respectively. The discount rate was 9.27% and 9.25% for the June 30, 2016 , and December 31, 2015 , valuations, respectively. The average capitalization rate for the first six months of 2016 ranged from 88 to 135 basis points compared to the range of 65 to 138 basis points for 2015. Fees collected for the servicing of mortgage loans for others were $3.0 million and $2.6 million for the quarter ended June 30, 2016 , and June 30, 2015 , respectively and $ 5.9 million and $ 5.0 million for the six months ended June 30, 2016 , and June 30, 2015 , respectively. The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2016 , and June 30, 2015 : 2016 2015 Balance at January 1, $ 30,314 $ 24,984 Originations 5,799 7,015 Amortization (4,826 ) (4,360 ) Balance at June 30, $ 31,287 $ 27,639 Fair value of mortgage servicing rights $ 39,881 $ 36,971 Mortgage servicing rights, net to servicing portfolio 0.74 % 0.73 % Heartland's commercial servicing rights portfolio was initially acquired with the Community Banc-Corp of Sheboygan, Inc. transaction that closed on January 16, 2015. Heartland also acquired commercial servicing rights portfolios with the Premier Valley Bank transaction that closed on November 30, 2015, and the CIC Bancshares, Inc. transaction that closed on February 5, 2016. The commercial servicing portfolio is comprised of loans guaranteed by the Small Business Administration and United States Department of Agriculture that have been sold with servicing retained by Heartland, which totaled $179.0 million . The commercial servicing rights portfolio is separated into two tranches, loans with a term of less than 20 years and loans with a term of more than 20 years , at each subsidiary. Fees collected for the servicing of commercial loans for others were $375,000 and $360,000 for the quarter ended June 30, 2016 and June 30, 2015 , respectively and $455,000 and $360,000 for the six months ended June 30, 2016 and June 30, 2015 , respectively. The fair value of each commercial servicing rights portfolio is calculated based upon a discounted cash flow analysis. Cash flow assumptions, including prepayment speeds and servicing costs, are considered in the calculation. The range of average constant prepayment rates for the portfolio valuations for the first six months of 2016 was 6.92% to 7.67% compared to 7.33% to 8.10% as of December 31, 2015. The discount rate range was 11.68% to 12.68% for the June 30, 2016 , valuations compared to 12.35% to 13.49% for the December 31, 2015, valuations. The capitalization rate for 2016 ranged from 3.10 to 4.45 basis points compared to 1.80 to 4.45 basis points for 2015. The total fair value of Heartland's commercial servicing rights was estimated at $4.8 million as of June 30, 2016 . The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the six months ended June 30, 2016 , and June 30, 2015 : 2016 2015 Balance at January 1, $ 4,611 $ — Purchased commercial servicing rights 190 4,255 Originations 404 141 Amortization (792 ) (452 ) Valuation allowance on commercial servicing rights (46 ) — Balance at June 30, $ 4,367 $ 3,944 Fair value of commercial servicing rights $ 4,791 $ 4,429 Commercial servicing rights, net to servicing portfolio 2.44 % 2.87 % Mortgage and commercial servicing rights are initially recorded at fair value in net gains on sale of loans held for sale when they are acquired through loan sales. Fair value is based on market prices for comparable servicing contracts, when available, or based on a valuation model that calculates the present value of estimated future net servicing income. Mortgage and commercial servicing rights are subsequently measured using the amortization method, which requires the asset to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing rights are evaluated for impairment at each Heartland subsidiary based upon the fair value of the assets as compared to the carrying amount. Impairment is recognized through a valuation allowance for specific tranches to the extent that fair value is less than carrying amount at each Heartland subsidiary. At June 30, 2016 , an $8,000 valuation allowance was required on commercial servicing rights less than 20 years and a $38,000 valuation allowance was required on commercial servicing rights greater than 20 years. At December 31, 2015 , no valuation allowance was required for any of Heartland's servicing rights. The following table summarizes, in thousands, the book value, the fair value of each tranche of the commercial servicing rights and any recorded valuation allowance at each respective subsidiary at June 30, 2016 and December 31, 2015: June 30, 2016 Book Value- Less than 20 Years Fair Value- Less than 20 Years Impairment- Less than 20 Years Book Value- More than 20 Years Fair Value- More than 20 Years Impairment- More than 20 Years Centennial Bank and Trust $ 28 $ 30 $ — $ 140 $ 148 $ — Premier Valley Bank 191 208 — 387 349 38 Wisconsin Bank & Trust 917 909 8 2,750 3,147 — Total $ 1,136 $ 1,147 $ 8 $ 3,277 $ 3,644 $ 38 December 31, 2015 Centennial Bank and Trust $ — $ — $ — $ — $ — $ — Premier Valley Bank 189 200 — 417 432 — Wisconsin Bank & Trust 1,048 1,097 — 2,957 3,173 — Total $ 1,237 $ 1,297 $ — $ 3,374 $ 3,605 $ —

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2016
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, 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. In addition, Heartland is facilitating back-to-back loan swaps to assist customers in managing interest rate risk. 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 counterparties that meet Heartland’s credit standards, and the contracts contain collateral provisions protecting the at-risk party. 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 $7.6 million and $5.3 million of cash as collateral at June 30, 2016 , and December 31, 2015 , respectively. Heartland's counterparties were required to pledge $0 at June 30, 2016 , and $79,000 at December 31, 2015 , respectively. Heartland's derivative and hedging instruments are recorded at fair value on the consolidated balance sheets. See Note 8, “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 (loss) related to derivatives will be reclassified to interest expense as interest payments are received or made on Heartland's variable-rate liabilities. For the six months ended June 30, 2016 , 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 $971,000 . For the next twelve months, Heartland estimates that cash payments and reclassification from accumulated other comprehensive income to interest expense will total $ 1.9 million . Heartland executed an interest rate swap transaction on April 5, 2011, with an effective date of April 20, 2011, to effectively convert $15.0 million of variable rate amortizing debt to fixed rate debt. For accounting purposes, this swap transaction was 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. This interest rate swap transaction expired on April 20, 2016. Heartland entered into five forward starting interest rate swap transactions to effectively convert Heartland Financial Statutory Trust IV, V, and VII, which total $ 65.0 million , as well as Morrill Statutory Trust I and II, which total $ 20.0 million , from variable rate subordinated debentures to fixed rate debt. For accounting purposes, these five swap transactions are designated as cash flow hedges of the changes in LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on $85.0 million of Heartland's subordinated debentures 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. During the first quarter of 2015, Heartland entered into two additional forward starting interest rate swaps. The first forward starting interest rate swap transaction relates to Heartland's $20.0 million Statutory Trust VI, which will convert from a fixed interest rate subordinated debenture to a variable interest rate subordinated debenture. The effective date of the interest rate swap transaction is June 15, 2017, and Heartland Statutory Trust VI will effectively remain at a fixed interest rate. The forward-starting swap transaction expires on June 15, 2024. The second forward starting interest rate swap is effective on March 1, 2017, and will replace the current interest rate swap related to Heartland Statutory Trust VII upon its expiration on March 1, 2017. Heartland entered into an interest rate swap transaction on May 10, 2016 to effectively convert $40.0 million of amortizing term debt from variable rate debt to fixed rate debt. For accounting purposes, this swap is designated as a cash flow hedge of the changes in LIBOR, the benchmark interest rate being hedged, associated with the interest payments on the amortizing term debt that resets monthly on a specified reset date. The swap expires on May 10, 2021. The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at June 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity June 30, 2016 Interest rate swap $ — $ — Other liabilities — % — % 04/20/2016 Interest rate swap 25,000 (1,556 ) Other liabilities 0.656 % 2.255 % 03/17/2021 Interest rate swap 20,000 (387 ) Other liabilities 0.673 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,907 ) Other liabilities 0.627 % 3.355 % 01/07/2020 Interest rate swap 10,000 (248 ) Other liabilities 0.640 % 1.674 % 03/26/2019 Interest rate swap 10,000 (244 ) Other liabilities 0.656 % 1.658 % 03/18/2019 Interest rate swap 39,667 (594 ) Other liabilities 2.945 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (1,481 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (1,519 ) Other liabilities — % 2.352 % 03/01/2024 December 31, 2015 Interest rate swap $ 8,947 $ (57 ) Other liabilities 3.152 % 5.140 % 04/20/2016 Interest rate swap 25,000 (713 ) Other liabilities 0.526 % 2.255 % 03/17/2021 Interest rate swap 20,000 (600 ) Other liabilities 0.414 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,582 ) Other liabilities 0.323 % 3.355 % 01/07/2020 Interest rate swap 10,000 (83 ) Other liabilities 0.603 % 1.674 % 03/26/2019 Interest rate swap 10,000 (83 ) Other liabilities 0.526 % 1.658 % 03/18/2019 Interest rate swap (1) 20,000 (146 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (176 ) Other liabilities — % 2.352 % 03/01/2024 (1) This swap is a forward starting swap with a weighted average pay rate of 2.390% beginning on June 15, 2017. No interest payments are required related to this swap until September 15, 2017. (2) This swap is a forward starting swap with a weighted average pay rate of 2.352% beginning on March 1, 2017. No interest payments are required on this swap until June 1, 2017. The table below identifies the gains and losses recognized on Heartland's derivative instruments designated as cash flow hedges for the three and six months ended June 30, 2016 , and June 30, 2015 , 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) Three Months Ended June 30, 2016 Interest rate swaps $ (1,579 ) Interest expense $ (465 ) Other income $ — Six Months Ended June 30, 2016 Interest rate swaps $ (4,496 ) Interest expense $ (971 ) Other income $ — Three Months Ended June 30, 2015 Interest rate swaps $ 2,068 Interest expense $ (559 ) Other income $ — Six Months Ended June 30, 2015 Interest rate swaps $ 1,178 Interest expense $ (1,123 ) Other income $ — Fair Value Hedge Heartland uses interest rate swaps to convert certain long term fixed rate loans to floating rates to hedge interest rate risk exposure. Heartland uses hedge accounting in accordance with ASC 815, with the unrealized gains and losses, representing the change in fair value of the derivative and the change in fair value of the risk being hedged on the related loan, being recorded in the consolidated statements of income. The ineffective portions of the unrealized gains or losses, if any, are recorded in interest income and interest expense in the consolidated statements of income. Heartland uses statistical regression to assess hedge effectiveness, both at the inception of the hedge as well as on a continual basis. The regression analysis involves regressing the periodic change in fair value of the hedging instrument against the periodic changes in the fair value of the asset being hedged due to changes in the hedge risk. During the second quarter of 2015, Heartland entered into an interest rate swap, paying a fixed interest rate of 3.40% to the counterparty and receiving a variable interest rate from the same counterparty based on one month LIBOR plus .88% calculated on a notional amount of $13.8 million . In the fourth quarter of 2015, Heartland acquired undesignated interest rate swaps with the Premier Valley Bank transaction. These swaps were classified as undesignated interest rate swaps at December 31, 2015. During the first quarter of 2016, Heartland was able to designate some of these interest rate swaps with long term fixed rate loans and now classifies these interest rate swaps as fair value hedges and uses hedge accounting in accordance with ASC 815. Heartland was required to pledge $6.6 million of cash and securities as collateral as of June 30, 2016 . The table below identifies the notional amount, fair value and balance sheet category of Heartland's fair value hedges at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2016 Fair value hedges $ 41,200 $ (4,681 ) Other liabilities December 31, 2015 Fair value hedges $ 13,805 $ (621 ) Other liabilities The table below identifies the gains and losses recognized on Heartland's fair value hedges for the three and six months ended June 30, 2016 , and June 30, 2015 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2016 Fair value hedges $ (888 ) Interest income Six Months Ended June 30, 2016 Fair value hedges $ (2,110 ) Interest income Three Months Ended June 30, 2015 Fair value hedges $ — Interest income Six Months Ended June 30, 2015 Fair value hedges $ — Interest income Embedded Derivatives Heartland acquired fixed rate loans with embedded derivatives in the Premier Valley Bank transaction during the fourth quarter of 2015. The loans contain terms that affect the cash flows or value of the loan similar to a derivative instrument, and therefore are considered to contain an embedded derivative. The embedded derivatives are bifurcated from the loans because the terms of the derivative instrument are not clearly and closely related to the loans. The embedded derivatives are recorded at fair value on the consolidated balance sheets as a part of other assets, and changes in the fair value are a component of noninterest income. The table below identifies the notional amount, fair value and balance sheet category of Heartland's embedded derivatives at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter-to-Date Gain (Loss) Recognized Year-to-Date June 30, 2016 Embedded derivatives $ 14,786 $ 1,990 Other assets Other noninterest income $ 144 $ 416 December 31, 2015 Embedded derivatives $ 15,020 $ 1,574 Other assets Other noninterest income $ — $ — In conjunction with the CIC Bancshares, Inc., transaction on February 5, 2016, Heartland acquired convertible subordinated debt. The subordinated debt has a face value of $2.0 million , and the embedded conversion option allows the holder to convert the debt to equity in any increment. The conversion option is bifurcated from the debt because the terms of the conversion option are not clearly and closely related to the terms of the debt. The total number of shares to be issued upon conversion is 73,394 . The embedded conversion option is reported at fair value on the consolidated balance sheets using the Black-Scholes model. The following table identifies, in thousands, the notional amount, fair value, balance sheet category and income statement category for the change in fair value of the convertible debt option as of June 30, 2016 : Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter- to-Date Gain (Loss) Recognized Year- to-Date June 30, 2016 Embedded conversion option $ 2,000 $ (619 ) Other liabilities Other noninterest income $ (197 ) $ (297 ) Back-To-Back Loan Swaps During 2015, Heartland began entering into interest rate swap loan relationships with customers to meet their financing needs. Upon entering into these loan swaps, Heartland enters into offsetting positions with counterparties in order to minimize interest rate risk. These back-to-back loan swaps qualify as free standing financial derivatives with the fair values reported in other assets and other liabilities on the consolidated balance sheets. Heartland was required to post $ 2.3 million and $ 0 as of June 30, 2016 and December 31, 2015 , respectively, as collateral related to these back-to-back swaps. Any gains and losses on these back-to-back swaps are recorded in noninterest income on the consolidated statements of income, and for the three and six months ended June 30, 2016 , no gain or loss was recognized. The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as loan swaps at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate June 30, 2016 Receive fixed-pay floating interest rate swap $ 51,505 $ 3,699 Other assets 4.82 % 3.27 % Pay fixed-receive floating interest rate swap 51,505 (3,699 ) Other liabilities 3.27 % 4.82 % December 31, 2015 Receive fixed-pay floating interest rate swap $ 15,782 $ 663 Other assets 5.08 % 3.07 % Pay fixed-receive floating interest rate swap 15,782 (663 ) Other liabilities 3.07 % 5.08 % Other Free Standing Derivatives Heartland 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. Heartland enters into forward commitments for the future delivery of residential mortgage loans when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on the commitments to fund the loans as well as on residential mortgage loans available for sale. 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. Heartland was required to pledge $1.7 million and $0 at June 30, 2016, and December 31, 2015, respectively, as collateral for these forward commitments. Heartland acquired undesignated interest rate swaps with the Premier Valley Bank transaction in the fourth quarter of 2015. These swaps were entered into primarily for the benefit of customers seeking to manage their interest rate risk and are not designated against specific assets or liabilities on the consolidated balance sheet or forecasted transactions and therefore do not qualify for hedge accounting in accordance with ASC 815. These swaps are carried at fair value on the consolidated balance sheets as a component of other liabilities, with changes in the fair value recorded as a component of other noninterest income. The table below identifies the balance sheet category and fair values of Heartland's other free standing derivative instruments not designated as hedging instruments at June 30, 2016 , and December 31, 2015 , in thousands: Balance Sheet Category Notional Amount Fair Value June 30, 2016 Interest rate lock commitments (mortgage) Other assets $ 142,118 $ 6,864 Forward commitments Other assets 55,000 469 Forward commitments Other liabilities 247,171 (2,502 ) Undesignated interest rate swaps Other liabilities 22,814 (2,213 ) December 31, 2015 Interest rate lock commitments (mortgage) Other assets $ 99,665 $ 3,168 Forward commitments Other assets 118,378 523 Forward commitments Other liabilities 136,709 (315 ) Undesignated interest rate swaps Other liabilities 50,975 (3,677 ) The table below identifies the income statement category of the gains and losses recognized in income on Heartland's other free standing derivative instruments not designated as hedging instruments for the three and six months ended June 30, 2016 , and June 30, 2015 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended June 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 1,081 Forward commitments Gains on sale of loans held for sale (753 ) Undesignated interest rate swaps Other noninterest income (54 ) Six Months Ended June 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 5,808 Forward commitments Gains on sale of loans held for sale (2,242 ) Undesignated interest rate swaps Other noninterest income (370 ) Three Months Ended June 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (1,712 ) Forward commitments Gains on sale of loans held for sale 3,700 Six Months Ended June 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 3,832 Forward commitments Gains on sale of loans held for sale 3,575

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2016
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, commercial servicing rights and other real estate owned. These nonrecurring fair value adjustments typically involve application of the 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 and corporate debt 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. 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 3) 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. Premises, furniture and equipment held for sale Heartland values premises, furniture and equipment held for sale based on third-party appraisals less estimated disposal costs. Heartland considers third party appraisals, as well as independent fair value assessments from Realtors or persons involved in selling bank premises, furniture and equipment, in determining the fair value of particular properties. Accordingly, the valuation of premises, furniture and equipment held for sale is subject to significant external and internal judgment. Heartland periodically reviews premises, furniture and equipment held for sale to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. Premises, furniture and equipment held for sale 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 fair 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. Commercial Servicing Rights Commercial servicing rights assets represent the value associated with servicing commercial loans guaranteed by the Small Business Administration and the United States Department of Agriculture that have been sold with servicing retained by Heartland. 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 commercial servicing rights. The fair value for servicing assets is determined through market prices for comparable servicing contracts, when available, or through a valuation model that calculates the present value of estimated future net servicing income. Inputs utilized include discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of these assumptions require a significant degree of management estimation and judgment. Commercial servicing rights are subject to impairment testing, and 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. If the valuation model reflects a fair value less than the carrying value, commercial servicing rights are adjusted to fair value through a valuation allowance. Heartland classifies commercial servicing rights as nonrecurring with Level 3 measurement inputs. Derivative Financial Instruments Heartland's current interest rate risk strategy includes interest rate swaps. 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 June 30, 2016 , and December 31, 2015 , 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. Interest rate lock commitments Heartland uses an internal valuation model that relies on internally developed inputs to estimate the fair value of its interest rate lock commitments which is based on unobservable inputs that reflect management's assumptions and specific information about each borrower. Interest rate lock commitments are classified in Level 3 of the fair value hierarchy. Forward commitments The fair value of forward commitments are estimated using an internal valuation model, which includes current trade pricing for similar financial instruments 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 of the fair value hierarchy. The table below presents Heartland's assets and liabilities that are measured at fair value on a recurring basis as of June 30, 2016 , and December 31, 2015 , 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 June 30, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 5,101 $ 535 $ 4,566 $ — Mortgage-backed securities 1,220,732 — 1,219,000 1,732 Obligations of states and political subdivisions 326,422 — 326,422 — Corporate debt securities 830 — 500 330 Equity securities 13,507 — 13,507 — Derivative financial instruments (1) 5,689 — 5,689 — Interest rate lock commitments 6,864 — — 6,864 Forward commitments 469 — 469 — Total assets at fair value $ 1,579,614 $ 535 $ 1,570,153 $ 8,926 Liabilities Derivative financial instruments (2) $ 19,148 $ — $ 19,148 $ — Forward commitments 2,502 — 2,502 — Total liabilities at fair value $ 21,650 $ — $ 21,650 $ — December 31, 2015 Assets Securities available for sale U.S. government corporations and agencies $ 25,766 $ 519 $ 25,247 $ — Mortgage-backed securities 1,242,702 — 1,240,663 2,039 Obligations of states and political subdivisions 295,982 — 295,982 — Corporate debt securities 846 — — 846 Equity securities 13,138 — 13,138 — Derivative financial instruments (1) 2,237 — 2,237 — Interest rate lock commitments 3,168 — — 3,168 Forward commitments 523 — 523 — Total assets at fair value $ 1,584,362 $ 519 $ 1,577,790 $ 6,053 Liabilities Derivative financial instruments (2) $ 8,401 $ — $ 8,401 $ — Forward commitments 315 — 315 — Total liabilities at fair value $ 8,716 $ — $ 8,716 $ — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps, embedded conversion options and free standing derivative instruments The tables below present Heartland's assets that are measured at fair value on a nonrecurring basis, in thousands: Fair Value Measurements at June 30, 2016 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,333 $ — $ — $ 1,333 $ — Commercial real estate 14,113 — — 14,113 998 Agricultural and agricultural real estate 105 — — 105 — Residential real estate 3,508 — — 3,508 — Consumer 1,845 — — 1,845 15 Total collateral dependent impaired loans $ 20,904 $ — $ — $ 20,904 $ 1,013 Other real estate owned $ 11,003 $ — $ — $ 11,003 $ 548 Premises, furniture and equipment held for sale $ 3,889 $ — $ 3,889 $ — Commercial servicing rights $ 1,258 $ — $ — $ 1,258 $ 46 Fair Value Measurements at December 31, 2015 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 597 $ — $ — $ 597 $ 82 Commercial real estate 1,522 — — 1,522 86 Agricultural and agricultural real estate — — — — — Residential real estate 2,330 — — 2,330 104 Consumer 1,905 — — 1,905 — Total collateral dependent impaired loans $ 6,354 $ — $ — $ 6,354 $ 272 Other real estate owned $ 11,524 $ — $ — $ 11,524 $ 5,520 Premises, furniture and equipment held for sale $ 3,889 $ — $ — $ 3,889 $ — Commercial servicing rights $ — $ — $ — $ — $ — 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: Fair Value at 6/30/16 Valuation Unobservable Range Z-TRANCHE Securities $ 1,732 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 19.85 - 34.02% (30.17%) Actual deferrals 9.57 - 22.12% (13.34%) Corporate debt securities 330 Discounted cash flows Bank analysis (1) Interest rate lock commitments 6,864 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,889 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial servicing rights 1,258 Discounted cash flows Third party valuation (4) Other real estate owned 11,003 Modified appraised value Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 1,333 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 14,113 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate 105 Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 3,508 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,845 Modified appraised value Third party valuation (3) Valuation discount (3) (1) The unobservable input is the bank analysis market using Moody's Global Bank Rating Methodology. The analysis takes into consideration various performance metrics as well as yield on the debt securities and credit risk analysis. (2) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data; therefore providing a range would not be meaningful. The weighted average closing ratio at June 30, 2016, was 87%. (3) 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. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. Fair Value at 12/31/15 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ 2,039 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 22.20 - 33.55% (30.60%) Actual deferrals 10.75 - 21.82% (13.36%) Corporate debt securities 846 Discounted cash flows Bank analysis (1) Interest rate lock commitments 3,168 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,889 Modified appraised value Third party appraisal (3) Commercial servicing rights — Discounted cash flows Third party valuation (4) Other real estate owned 11,524 Modified appraised value Disposal costs (3) Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 597 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 1,522 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate — Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 2,330 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,905 Modified appraised value Third party valuation (3) Valuation discount (3) (1) The unobservable input is the bank analysis market using Moody's Global Bank Rating Methodology. The analysis takes into consideration various performance metrics as well as yield on the debt securities and credit risk analysis. (2) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data; therefore providing a range would not be meaningful. The weighted average closing ratio at December 31, 2015, was 86%. (3) 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. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. The changes in fair value of the Z-TRANCHE, a Level 3 asset, that is measured on a recurring basis are summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 2,039 $ 4,947 Total gains (losses): Included in earnings — (3,038 ) Included in other comprehensive income (307 ) 982 Purchases, sales and settlements: Purchases — 6 Sales — (736 ) Settlements — (122 ) Balance at period end $ 1,732 $ 2,039 The changes in fair value of the corporate debt securities, Level 3 assets, that are measured on a recurring basis is summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 846 $ — Total gains (losses): Included in earnings 121 — Included in other comprehensive income (91 ) 106 Purchases, acquired, sales and settlements: Purchases — — Acquired — 740 Sales (546 ) — Settlements — — Balance at period end $ 330 $ 846 The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments and are measured on a recurring basis, are summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 3,168 $ 2,496 Total gains (losses) included in earnings 5,808 288 Issuances 142 5,428 Settlements (2,254 ) (5,044 ) Balance at period end $ 6,864 $ 3,168 Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments held at June 30, 2016 , and December 31, 2015 , were $6.9 million and $3.2 million , respectively. The tables below summarize the estimated fair value of Heartland's financial instruments as defined by ASC 825 as of June 30, 2016 , and December 31, 2015 , 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, premises, furniture and equipment held for sale, 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 June 30, 2016 Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 229,950 $ 229,950 $ 229,950 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,566,592 1,566,592 535 1,563,995 2,062 Held to maturity 270,423 292,854 — 292,854 — Other investments 22,680 22,680 — 22,445 235 Loans held for sale 82,538 82,538 — 82,538 — Loans, net: Commercial 1,271,131 1,265,814 — 1,264,481 1,333 Commercial real estate 2,619,284 2,619,499 — 2,605,386 14,113 Agricultural and agricultural real estate 477,450 480,805 — 480,700 105 Residential real estate 641,006 637,007 — 633,499 3,508 Consumer 421,631 425,110 — 423,265 1,845 Total Loans, net 5,430,502 5,428,235 — 5,407,331 20,904 Derivative financial instruments (1) 5,689 5,689 — 5,689 — Interest rate lock commitments 6,864 6,864 — — 6,864 Forward commitments 469 469 — 469 — Financial liabilities: Deposits Demand deposits 2,149,911 2,149,911 — 2,149,911 — Savings deposits 3,691,791 3,691,791 — 3,691,791 — Time deposits 995,870 995,870 — 995,870 — Short term borrowings 303,707 303,707 — 303,707 — Other borrowings 296,895 297,384 — 297,384 — Derivative financial instruments (2) 19,148 19,148 — 19,148 — Forward commitments 2,502 2,502 — 2,502 — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps, embedded conversion options and free standing derivative instruments Fair Value Measurements at December 31, 2015 Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 258,799 $ 258,799 $ 258,799 $ — $ — Time deposits in other financial institutions 2,355 2,355 2,355 — — Securities: Available for sale 1,578,434 1,578,434 519 1,575,030 2,885 Held to maturity 279,117 294,513 — 294,513 — Other investments 21,443 21,443 — 21,208 235 Loans held for sale 74,783 74,783 — 74,783 — Loans, net: Commercial 1,262,612 1,257,355 — 1,256,758 597 Commercial real estate 2,305,908 2,304,716 — 2,303,194 1,522 Agricultural and agricultural real estate 468,533 469,485 — 469,485 — Residential real estate 536,190 531,931 — 529,601 2,330 Consumer 379,558 382,579 — 380,674 1,905 Total Loans, net 4,952,801 4,946,066 — 4,939,712 6,354 Derivative financial instruments (1) 2,237 2,237 — 2,237 — Interest rate lock commitments 3,168 3,168 — — 3,168 Forward commitments 523 523 — 523 — Financial liabilities: Deposits Demand deposits 1,914,141 1,914,141 — 1,914,141 — Savings deposits 3,367,479 3,367,479 — 3,367,479 — Time deposits 1,124,203 1,124,203 — 1,124,203 — Short term borrowings 293,898 293,898 — 293,898 — Other borrowings 263,214 281,271 — 281,271 — Derivative financial instruments (2) 8,401 8,401 — 8,401 — Forward commitments 315 315 — 315 — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps and free standing derivative instruments 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. Other Investments — Fair value measurement of other investments, which consists primarily of FHLB stock, are based on their redeemable value, which is at cost due to the restrictions placed on their transferability. The market for these securities is restricted to the issuer of the stock and subject to impairment evaluation. 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 fair value of the underlying collateral. The fair value of loans held for sale is estimated using quoted market prices. Interest Rate Lock Commitments — The fair value of interest rate lock commitments is estimated using an internal valuation model, which includes grouping the interest rate lock commitments by interest rate and terms, applying an estimated closing ratio based on historical experience, and then multiplying by quoted investor prices determined to be reasonably applicable to the loan commitment groups based on interest rate, terms, and rate lock expiration dates of the loan commitment group. Forward Commitments — The fair value of these instruments is estimated using an internal valuation model, which includes current trade pricing for similar financial instruments. Derivative Financial Instruments — 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 prices, 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	6 Months Ended
	Jun. 30, 2016
Segment Reporting [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 are 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- and six -month periods ended June 30, 2016 , and June 30, 2015 , in thousands. Three Months Ended 2016 2015 Community and Other Banking Retail Mortgage Banking Total Community and Other Banking Retail Mortgage Banking Total Net interest income $ 71,895 $ 1,223 $ 73,118 $ 55,988 $ 1,656 $ 57,644 Provision for loan losses 2,118 — 2,118 5,674 — 5,674 Total noninterest income 19,899 11,127 31,026 15,603 15,058 30,661 Total noninterest expense 59,694 11,326 71,020 48,987 14,495 63,482 Income before taxes $ 29,982 $ 1,024 $ 31,006 $ 16,930 $ 2,219 $ 19,149 Average Loans, for the period $ 5,507,542 $ 75,336 $ 5,582,878 $ 4,340,289 $ 106,835 $ 4,447,124 Segment Assets, at period end $ 8,082,153 $ 122,248 $ 8,204,401 $ 6,579,225 $ 137,782 $ 6,717,007 Six Months Ended 2016 2015 Community Retail Total Community Retail Total Net interest income $ 143,478 $ 2,347 $ 145,825 $ 108,877 $ 2,697 $ 111,574 Provision for loan losses 4,185 — 4,185 7,345 — 7,345 Total noninterest income 38,436 22,168 60,604 32,664 28,660 61,324 Total noninterest expense 119,433 21,896 141,329 96,446 26,650 123,096 Income (loss) before taxes $ 58,296 $ 2,619 $ 60,915 $ 37,750 $ 4,707 $ 42,457 Average Loans, for the period $ 5,401,867 $ 68,623 $ 5,470,490 $ 4,265,624 $ 92,231 $ 4,357,855 Segment Assets, at period end $ 8,082,153 $ 122,248 $ 8,204,401 $ 6,579,225 $ 137,782 $ 6,717,007

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Earnings Per Share	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.
Stock-Based Compensation	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 was originally approved by stockholders in May 2012 and was amended effective March 8, 2016 to increase the number of shares of common stock authorized for issuance and make certain other changes to the Plan. As of June 30, 2016, 548,079 shares of common stock were available 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.
Effect of New Financial Accounting Standards	Effect of New Financial Accounting Standards In May 2014, the FASB issued ASU 2014-09, " Revenue from Contracts with Customers ." The amendment clarifies the principles for recognizing revenue and develops a common revenue standard. The amendment outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” In applying the revenue model to contracts within its scope, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The amendment applies to all contracts with customers except those that are within the scope of other topics in the FASB Codification. The standard also requires significantly expanded disclosures about revenue recognition. The amendment is effective for annual reporting periods beginning after December 15, 2017 (including interim reporting periods within those periods). Early application is not permitted. Heartland intends to adopt the accounting standard during the first quarter of 2018, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In November 2014, the FASB issued ASU 2014-16, " Derivatives and Hedging (Topic 815): Determining Whether a Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity." The amendment clarifies how current guidance should be interpreted in evaluating the characteristics and risks of a host contract in a hybrid financial instrument issued in the form of a share. One criterion requires evaluating whether the nature of the host contract is more akin to debt or to equity and whether the economic characteristics and risks of the embedded derivative feature are "clearly and closely related" to the host contract. In making that evaluation, an issuer or investor must consider all terms and features in a hybrid financial instrument including the embedded derivative feature that is being evaluated for separate accounting or may consider all terms and features in the hybrid financial instrument except for the embedded derivative feature that is being evaluated for separate accounting. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015, with early adoption permitted. Heartland adopted this standard on January 1, 2016, and the adoption of this standard did not have a material impact on its results of operations, financial position, and liquidity. In January 2015, the FASB issued ASU 2015-01, " Income Statement-Extraordinary and Unusual Items ." The amendment eliminates from U.S. GAAP the concept of extraordinary items. Presently, an event or transaction is presumed to be an ordinary and usual activity of the reporting entity unless evidence clearly supports its classification as an extraordinary item. If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. This amended guidance will prohibit separate disclosure of extraordinary items in the income statement. This amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Entities may apply the amendment prospectively or retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Heartland adopted this standard on January 1, 2016, and the adoption of this standard did not have a material impact on the results of operations, financial position, and liquidity. In April 2015, the FASB issued ASU 2015-05, "Intangibles-Goodwill and Other-Internal-Use Software." The amendment intends to provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance will not change GAAP for a customer's accounting for service contracts. As a result, all software licenses within the scope of this guidance will be accounted for consistently with other licenses of intangible assets. This amendment is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Entities can elect to adopt the standard either retrospectively or prospectively to all cloud computing arrangements entered into or materially modified after the adoption date. Early adoption is permitted. Heartland adopted this standard on January 1, 2016 and the adoption did not have a material impact on the results of operations, financial position, and liquidity. In September 2015, the FASB issued ASU 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments." The amendment eliminates the requirement of Topic 805, Business Combinations, to retrospectively adjust the financial statements for measurement-period adjustments that occur in periods after a business combination is consummated. Measurement-period adjustments are calculated as if they were known at the acquisition date, but are recognized in the reporting period in which they are determined. Prior period information is not revised. Additional disclosures are required about the impact on current period income statement line items of adjustments that would have been recognized in prior periods if prior period information had been revised. This amendment is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted if financial statements have not been issued. Heartland adopted this standard effective September 30, 2015. The adoption of this standard did not have a material impact on the results of operations, financial position, and liquidity. In January 2016, the FASB issued guidance ASU 2016-01, " Recognition and Measurement of Financial Assets and Financial Liabilitie s." The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: (1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (5) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; (7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except for the early application of the amendment noted in item (5) above, early adoption of the amendments in this update is not permitted. Heartland intends to adopt the accounting standard in 2018, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In February 2016, the FASB issued ASU 2016-02, " Leases (Topic 842)." Topic 842 requires a lessee to recognize a lease liability and a right of use asset for each lease, with the exception of short term leases, at the commencement date of the lease and disclose key information about the leasing arrangement. Accounting requirements applied by lessors is largely unchanged. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and will be applied on a modified retrospective basis. Heartland intends to adopt the accounting standard in 2019, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity. In March 2016, the FASB issued ASU 2016-09, "Compensation-Stock Compensation (Topic 718)." The amendments in this ASU simplify several aspects of the accounting for share-based payments, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendments in this ASU are effective for annual periods beginning after December 15, 2016 and interim periods within those annual periods. Early adoption is permitted for any interim or annual period prior to the effective date. An entity that elects early adoption must adopt all of the amendments in the same period. Heartland intends to adopt this ASU in 2017, as required, and believes the adoption will not have an impact on its results of operations, financial position, and liquidity. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)." The amendments in this ASU require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The amendments in this ASU indicate that an entity should not use the length of time a security has been in an unrealized loss position to avoid recording a credit loss. In addition, in determining whether a credit loss exists, the amendments in this ASU also remove the requirements to consider the historical and implied volatility of the fair value of a security and recoveries or declines in fair value after the balance sheet date. The amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. An entity may adopt the amendments earlier as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Heartland intends to adopt the accounting standard in 2020, as required, and is currently evaluating the impact on its results of operations, financial position, and liquidity.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2016
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- and six -month periods ended June 30, 2016 and 2015 , are shown in the table below: Three Months Ended (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 20,970 $ 15,160 Preferred dividends and discount (52 ) (204 ) Interest expense on convertible preferred debt 31 — Net income available to common stockholders $ 20,949 $ 14,956 Weighted average common shares outstanding for basic earnings per share 24,524 20,599 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 451 278 Weighted average common shares for diluted earnings per share 24,975 20,877 Earnings per common share — basic $ 0.85 $ 0.73 Earnings per common share — diluted $ 0.84 $ 0.72 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — — Six Months Ended (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 40,979 $ 30,869 Preferred dividends (220 ) (408 ) Interest expense on convertible preferred debt 31 — Net income available to common stockholders $ 40,790 $ 30,461 Weighted average common shares outstanding for basic earnings per share 24,093 20,408 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 448 274 Weighted average common shares for diluted earnings per share 24,541 20,682 Earnings per common share — basic $ 1.69 $ 1.49 Earnings per common share — diluted $ 1.66 $ 1.47 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — —
Summary of Status of RSUs	A summary of the RSUs outstanding as of June 30, 2016 and 2015 , and changes during the six months ended June 30, 2016 and 2015 , follows: 2016 2015 Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 353,195 $ 25.53 396,555 $ 21.48 Granted 141,721 29.79 139,943 28.90 Vested (117,898 ) 23.40 (151,681 ) 17.98 Forfeited (10,892 ) 27.13 (11,198 ) 25.14 Outstanding at June 30 366,126 $ 27.60 373,619 $ 25.55
Summary of Status of Stock Options	A summary of the stock options outstanding as of June 30, 2016 and 2015 , and changes during the six months ended June 30, 2016 and 2015 , follows: 2016 2015 Shares Weighted-Average Exercise Price Shares Weighted-Average Exercise Price Outstanding at January 1 125,950 $ 24.08 215,851 $ 23.85 Granted — — — — Exercised (35,000 ) 23.53 (56,650 ) 22.85 Forfeited (1,500 ) 21.10 (2,250 ) 23.88 Outstanding at June 30 89,450 $ 24.34 156,951 $ 24.18 Options exercisable at June 30 89,450 $ 24.34 156,951 $ 24.18

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table represents, in thousands, the amounts recorded on the consolidated balance sheet as of February 5, 2016: As of February 5, 2016 Fair value of consideration paid: Common Stock (2,003,235 shares) $ 57,433 Preferred Stock (3,000 shares) 3,777 Cash 15,672 Total consideration paid 76,882 Fair value of assets acquired: Cash and due from banks 23,756 Securities: Securities available for sale 92,831 Other securities 3,486 Loans held to maturity 581,477 Premises, furniture and equipment, net 16,450 Other real estate, net 1,934 Other intangible assets, net 6,576 Other assets 16,276 Total assets 742,786 Fair value of liabilities assumed: Deposits 648,111 Short term borrowings 35,766 Other borrowings 7,924 Other liabilities 3,951 Total liabilities assumed 695,752 Fair value of net assets acquired 47,034 Goodwill resulting from acquisition $ 29,848
Business Acquisition, Pro Forma Information	The following pro forma information presents the results of operations for the years ended December 31, 2015, and December 31, 2014, as if the CIC Bancshares, Inc. acquisition occurred on January 1, 2014: (Dollars in thousands, except per share data), unaudited For the Years Ended December 31, 2015 December 31, 2014 Net interest income $ 259,531 $ 221,808 Net income available to common shareholders $ 59,491 $ 41,004 Basic earnings per share $ 2.63 $ 2.00 Diluted earnings per share $ 2.58 $ 1.96

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Available for Sale Securities	The amortized cost, gross unrealized gains and losses, and estimated fair values of securities available for sale as of June 30, 2016 , and December 31, 2015 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value June 30, 2016 U.S. government corporations and agencies $ 4,943 $ 158 $ — $ 5,101 Mortgage-backed securities 1,226,085 13,776 (19,129 ) 1,220,732 Obligations of states and political subdivisions 311,883 14,583 (44 ) 326,422 Corporate debt securities 815 15 — 830 Total debt securities 1,543,726 28,532 (19,173 ) 1,553,085 Equity securities 13,158 349 — 13,507 Total $ 1,556,884 $ 28,881 $ (19,173 ) $ 1,566,592 December 31, 2015 U.S. government corporations and agencies $ 25,847 $ 22 $ (103 ) $ 25,766 Mortgage-backed securities 1,254,452 9,134 (20,884 ) 1,242,702 Obligations of states and political subdivisions 290,522 6,547 (1,087 ) 295,982 Corporate debt securities 740 106 — 846 Total debt securities 1,571,561 15,809 (22,074 ) 1,565,296 Equity securities 13,142 40 (44 ) 13,138 Total $ 1,584,703 $ 15,849 $ (22,118 ) $ 1,578,434
Schedule of Held to Maturity Securities	The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of June 30, 2016 , and December 31, 2015 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value June 30, 2016 Mortgage-backed securities $ — $ — $ — $ — Obligations of states and political subdivisions 270,423 22,717 (286 ) 292,854 Total $ 270,423 $ 22,717 $ (286 ) $ 292,854 December 31, 2015 Mortgage-backed securities $ 4,369 $ 306 $ — $ 4,675 Obligations of states and political subdivisions 274,748 15,595 (505 ) 289,838 Total $ 279,117 $ 15,901 $ (505 ) $ 294,513
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities available for sale at June 30, 2016 , 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 $ 1,645 $ 1,653 Due in 1 to 5 years 15,892 16,181 Due in 5 to 10 years 87,334 90,004 Due after 10 years 212,770 224,515 Total debt securities 317,641 332,353 Mortgage-backed securities 1,226,085 1,220,732 Equity securities 13,158 13,507 Total investment securities $ 1,556,884 $ 1,566,592 The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2016 , 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 $ 4,380 $ 4,448 Due in 1 to 5 years 14,327 15,170 Due in 5 to 10 years 87,072 92,495 Due after 10 years 164,644 180,741 Total debt securities 270,423 292,854 Mortgage-backed securities — — Total investment securities $ 270,423 $ 292,854
Schedule of Realized Gross Gains (Losses)	Gross gains and losses realized related to the sales of securities available for sale for the three- and six -month periods ended June 30, 2016 and 2015 , are summarized as follows, in thousands: Three Months Ended Six Months Ended 2016 2015 2016 2015 Proceeds from sales $ 318,927 $ 270,688 $ 622,375 $ 526,026 Gross security gains 5,095 3,819 9,653 8,441 Gross security losses 473 709 1,155 978
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 June 30, 2016 , and December 31, 2015 . 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 w as June 30, 2015, and December 31, 2014 , 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 Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2016 U.S. government corporations and agencies $ — $ — $ — $ — $ — $ — Mortgage-backed securities 517,699 (14,569 ) 144,275 (4,560 ) 661,974 (19,129 ) Obligations of states and political subdivisions 2,236 (43 ) 255 (1 ) 2,491 (44 ) Corporate debt securities — — — — — — Total debt securities 519,935 (14,612 ) 144,530 (4,561 ) 664,465 (19,173 ) Equity securities — — — — — — Total temporarily impaired securities $ 519,935 $ (14,612 ) $ 144,530 $ (4,561 ) $ 664,465 $ (19,173 ) December 31, 2015 U.S. government corporations and agencies $ 22,359 $ (103 ) $ — $ — $ 22,359 $ (103 ) Mortgage-backed securities 724,330 (15,523 ) 139,562 (5,361 ) 863,892 (20,884 ) Obligations of states and political subdivisions 68,482 (896 ) 7,460 (191 ) 75,942 (1,087 ) Corporate debt securities — — — — — — Total debt securities 815,171 (16,522 ) 147,022 (5,552 ) 962,193 (22,074 ) Equity securities 6,566 (44 ) — — 6,566 (44 ) Total temporarily impaired securities $ 821,737 $ (16,566 ) $ 147,022 $ (5,552 ) $ 968,759 $ (22,118 )
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 Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2016 Obligations of states and political subdivisions 1,388 (3 ) 1,131 (283 ) 2,519 (286 ) Total temporarily impaired securities $ 1,388 $ (3 ) $ 1,131 $ (283 ) $ 2,519 $ (286 ) December 31, 2015 Obligations of states and political subdivisions 3,646 (12 ) 18,033 (493 ) 21,679 (505 ) Total temporarily impaired securities $ 3,646 $ (12 ) $ 18,033 $ (493 ) $ 21,679 $ (505 )
OTTI Write-downs Included in Earnings and AOCI	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 Six Months Ended 2016 2015 2016 2015 Recorded as part of gross realized losses: Credit related OTTI $ — $ — $ — $ — Intent to sell OTTI — — — — Total recorded as part of gross realized losses — — — — Recorded directly to AOCI for non-credit related impairment: Residential mortgage backed securities — — — — Reduction of non-credit related impairment related to security sales — — (120 ) — Accretion of non-credit related impairment — (24 ) (7 ) (48 ) Total changes to AOCI for non-credit related impairment — (24 ) (127 ) (48 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (24 ) $ (127 ) $ (48 )

Loans and Leases (Tables)

Loans and Leases (Tables)	6 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Schedule of Loans and Leases	Loans and leases as of June 30, 2016 , and December 31, 2015 , were as follows, in thousands: June 30, 2016 December 31, 2015 Loans and leases receivable held to maturity: Commercial $ 1,287,301 $ 1,279,214 Commercial real estate 2,643,578 2,326,360 Agricultural and agricultural real estate 480,883 471,870 Residential real estate 644,267 539,555 Consumer 428,730 386,867 Gross loans and leases receivable held to maturity 5,484,759 5,003,866 Unearned discount (686 ) (488 ) Deferred loan fees (1,815 ) (1,892 ) Total net loans and leases receivable held to maturity 5,482,258 5,001,486 Allowance for loan and lease losses (51,756 ) (48,685 ) Loans and leases receivable, net $ 5,430,502 $ 4,952,801
Allowance for Loan and Lease Losses, Based on Impairment Methodology	The following table shows the balance in the allowance for loan and lease losses at June 30, 2016 , and December 31, 2015 , 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 2016. Allowance For Loan and Lease Losses Gross Loans and Leases Receivable Held to Maturity Ending Balance Under ASC 310-10-35 Ending Balance Under ASC 450-20 Total Ending Balance Evaluated for Impairment Under ASC 310-10-35 Ending Balance Evaluated for Impairment Under ASC 450-20 Total June 30, 2016 Commercial $ 1,342 $ 14,183 $ 15,525 $ 7,985 $ 1,279,316 $ 1,287,301 Commercial real estate 2,780 20,188 22,968 53,481 2,590,097 2,643,578 Agricultural and agricultural real estate 6 4,094 4,100 14,359 466,524 480,883 Residential real estate 446 1,619 2,065 21,710 622,557 644,267 Consumer 1,351 5,747 7,098 5,708 423,022 428,730 Total $ 5,925 $ 45,831 $ 51,756 $ 103,243 $ 5,381,516 $ 5,484,759 December 31, 2015 Commercial $ 471 $ 15,624 $ 16,095 $ 6,919 $ 1,272,295 $ 1,279,214 Commercial real estate 698 18,834 19,532 45,442 2,280,918 2,326,360 Agricultural and agricultural real estate — 3,887 3,887 4,612 467,258 471,870 Residential real estate 393 1,541 1,934 17,790 521,765 539,555 Consumer 1,206 6,031 7,237 5,458 381,409 386,867 Total $ 2,768 $ 45,917 $ 48,685 $ 80,221 $ 4,923,645 $ 5,003,866
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 at June 30, 2016 , and December 31, 2015 , in thousands. There were no nonaccrual leases, accruing leases past due 90 days or more or restructured leases at June 30, 2016 , and December 31, 2015 . June 30, 2016 December 31, 2015 Nonaccrual loans $ 55,732 $ 37,874 Nonaccrual troubled debt restructured loans 1,321 1,781 Total nonaccrual loans $ 57,053 $ 39,655 Accruing loans past due 90 days or more $ — $ — Performing troubled debt restructured loans $ 9,923 $ 11,075
Troubled Debt Restructuring on Loans Modified	The following table provides information on troubled debt restructured loans that were modified during the three- and six -month periods ended June 30, 2016 , and June 30, 2015 , dollars in thousands: Three Months Ended 2016 2015 Number Pre- Post- Number Pre- Post- Commercial 1 $ 100 $ 100 1 $ 830 $ 830 Commercial real estate 1 179 179 — — — Total commercial and commercial real estate 2 279 279 1 830 830 Agricultural and agricultural real estate — — — 1 311 311 Residential real estate — — — — — — Consumer — — — — — — Total 2 $ 279 $ 279 2 $ 1,141 $ 1,141 Six Months Ended 2016 2015 Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Commercial 1 $ 100 $ 100 1 $ 830 $ 830 Commercial real estate 1 179 179 1 3,992 3,992 Total commercial and commercial real estate 2 279 279 2 4,822 4,822 Agricultural and agricultural real estate — — — 1 311 311 Residential real estate — — — — — — Consumer — — — — — — Total 2 $ 279 $ 279 3 $ 5,133 $ 5,133
Troubled Debt Restructured Loans with Payment Default	The following tables presents troubled debt restructured loans for which there was a payment default during the three and six months ended June 30, 2016 , and June 30, 2015 , that had been modified during the twelve-month period prior to default. With Payment Defaults During the Following Periods Three Months Ended 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 100 — $ — Commercial real estate — — — — Total commercial and commercial real estate 1 100 — — Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 100 — $ — With Payment Defaults During the Following Periods Six Months Ended June 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 100 — $ — Commercial real estate — — — — Total commercial and commercial real estate 1 100 — — Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 100 — $ —
Financing Receivable Credit Quality Indicators	The following table presents loans and leases by credit quality indicator at June 30, 2016 , and December 31, 2015 , in thousands: Pass Nonpass Total June 30, 2016 Commercial $ 1,154,318 $ 132,983 $ 1,287,301 Commercial real estate 2,438,572 205,006 2,643,578 Total commercial and commercial real estate 3,592,890 337,989 3,930,879 Agricultural and agricultural real estate 431,671 49,212 480,883 Residential real estate 615,626 28,641 644,267 Consumer 418,251 10,479 428,730 Total gross loans and leases receivable held to maturity $ 5,058,438 $ 426,321 $ 5,484,759 December 31, 2015 Commercial $ 1,106,276 $ 172,938 $ 1,279,214 Commercial real estate 2,107,474 218,886 2,326,360 Total commercial and commercial real estate 3,213,750 391,824 3,605,574 Agricultural and agricultural real estate 435,745 36,125 471,870 Residential real estate 515,195 24,360 539,555 Consumer 377,173 9,694 386,867 Total gross loans and leases receivable held to maturity $ 4,541,863 $ 462,003 $ 5,003,866
Past Due Financing Receivables	The following table sets forth information regarding Heartland's accruing and nonaccrual loans and leases at June 30, 2016 , and December 31, 2015 , in thousands: Accruing Loans and Leases 30-59 Days Past Due 60-89 Days 90 Days or More Past Due Total Past Due Current Nonaccrual Total Loans and Leases June 30, 2016 Commercial $ 1,714 $ 823 $ — $ 2,537 $ 1,279,293 $ 5,471 $ 1,287,301 Commercial real estate 17,469 12,058 — 29,527 2,595,224 18,827 2,643,578 Total commercial and commercial real estate 19,183 12,881 — 32,064 3,874,517 24,298 3,930,879 Agricultural and agricultural real estate 1,108 133 — 1,241 468,819 10,823 480,883 Residential real estate 1,554 17 — 1,571 624,327 18,369 644,267 Consumer 4,058 949 — 5,007 420,160 3,563 428,730 Total gross loans and leases receivable held to maturity $ 25,903 $ 13,980 $ — $ 39,883 $ 5,387,823 $ 57,053 $ 5,484,759 December 31, 2015 Commercial $ 2,005 $ 608 $ — $ 2,613 $ 1,273,678 $ 2,923 $ 1,279,214 Commercial real estate 3,549 2,077 — 5,626 2,302,052 18,682 2,326,360 Total commercial and commercial real estate 5,554 2,685 — 8,239 3,575,730 21,605 3,605,574 Agricultural and agricultural real estate 143 54 — 197 470,455 1,218 471,870 Residential real estate 1,900 115 — 2,015 523,915 13,625 539,555 Consumer 3,964 933 — 4,897 378,763 3,207 386,867 Total gross loans and leases receivable held to maturity $ 11,561 $ 3,787 $ — $ 15,348 $ 4,948,863 $ 39,655 $ 5,003,866
Impaired Loans Not Covered by Loss Share Agreements	The following tables present, by category of loan, impaired loans, the unpaid contractual loan balances at June 30, 2016 , and December 31, 2015 ; the outstanding loan balances recorded on the consolidated balance sheets at June 30, 2016 , and December 31, 2015 ; any related allowance recorded for those loans as of June 30, 2016 , and December 31, 2015 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three and six months ended June 30, 2016 , and year ended December 31, 2015 ; and the interest income recognized on the impaired loans during the three and six months ended June 30, 2016 , and year ended December 31, 2015 , in thousands: Unpaid Contractual Balance Loan Balance Related Allowance Recorded Quarter- to- Date Avg. Loan Balance Quarter- to- Date Interest Income Recognized Year- to- Date Avg. Loan Balance Year- to- Date Interest Income Recognized June 30, 2016 Impaired loans with a related allowance: Commercial $ 2,664 $ 2,664 $ 1,342 $ 3,598 $ 8 $ 2,857 $ 14 Commercial real estate 16,106 16,106 2,780 7,823 208 6,037 213 Total commercial and commercial real estate 18,770 18,770 4,122 11,421 216 8,894 227 Agricultural and agricultural real estate 111 111 6 36 — 18 — Residential real estate 3,792 3,706 446 3,351 3 3,127 7 Consumer 3,185 3,185 1,351 3,359 6 3,277 15 Total impaired loans with a related allowance $ 25,858 $ 25,772 $ 5,925 $ 18,167 $ 225 $ 15,316 $ 249 Impaired loans without a related allowance: Commercial $ 5,332 $ 5,321 $ — $ 4,709 $ 91 $ 7,281 $ 261 Commercial real estate 38,783 37,375 — 38,928 380 42,830 785 Total commercial and commercial real estate 44,115 42,696 — 43,637 471 50,111 1,046 Agricultural and agricultural real estate 14,248 14,248 — 14,031 — 10,700 94 Residential real estate 18,137 18,004 — 17,050 49 17,082 81 Consumer 2,538 2,523 — 2,337 11 2,651 20 Total impaired loans without a related allowance $ 79,038 $ 77,471 $ — $ 77,055 $ 531 $ 80,544 $ 1,241 Total impaired loans held to maturity: Commercial $ 7,996 $ 7,985 $ 1,342 $ 8,307 $ 99 $ 10,138 $ 275 Commercial real estate 54,889 53,481 2,780 46,751 588 48,867 998 Total commercial and commercial real estate 62,885 61,466 4,122 55,058 687 59,005 1,273 Agricultural and agricultural real estate 14,359 14,359 6 14,067 — 10,718 94 Residential real estate 21,929 21,710 446 20,401 52 20,209 88 Consumer 5,723 5,708 1,351 5,696 17 5,928 35 Total impaired loans held to maturity $ 104,896 $ 103,243 $ 5,925 $ 95,222 $ 756 $ 95,860 $ 1,490 Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year-to- Date Avg. Loan Balance Year-to- Date Interest Income Recognized December 31, 2015 Impaired loans with a related allowance: Commercial $ 1,192 $ 1,160 $ 471 $ 524 $ 12 Commercial real estate 2,697 2,697 698 2,539 19 Total commercial and commercial real estate 3,889 3,857 1,169 3,063 31 Agricultural and agricultural real estate — — — 2,823 — Residential real estate 2,210 2,125 393 2,524 16 Consumer 3,111 3,111 1,206 2,877 33 Total impaired loans with a related allowance $ 9,210 $ 9,093 $ 2,768 $ 11,287 $ 80 Impaired loans without a related allowance: Commercial $ 5,784 $ 5,759 $ — $ 7,511 $ 515 Commercial real estate 46,099 42,745 — 38,444 1,395 Total commercial and commercial real estate 51,883 48,504 — 45,955 1,910 Agricultural and agricultural real estate 4,612 4,612 — 2,287 175 Residential real estate 15,802 15,665 — 10,186 145 Consumer 2,347 2,347 — 2,403 38 Total impaired loans without a related allowance $ 74,644 $ 71,128 $ — $ 60,831 $ 2,268 Total impaired loans held to maturity: Commercial $ 6,976 $ 6,919 $ 471 $ 8,035 $ 527 Commercial real estate 48,796 45,442 698 40,983 1,414 Total commercial and commercial real estate 55,772 52,361 1,169 49,018 1,941 Agricultural and agricultural real estate 4,612 4,612 — 5,110 175 Residential real estate 18,012 17,790 393 12,710 161 Consumer 5,458 5,458 1,206 5,280 71 Total impaired loans held to maturity $ 83,854 $ 80,221 $ 2,768 $ 72,118 $ 2,348
Summary of Purchased Impaired and Nonimpaired Loans	The carrying amount of the acquired loans at June 30, 2016 and December 31, 2015 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: June 30, 2016 December 31, 2015 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 3,261 $ 154,959 $ 158,220 $ — $ 159,393 $ 159,393 Commercial real estate 4,071 762,523 766,594 7,716 494,010 501,726 Agricultural and agricultural real estate — 771 771 — 2,985 2,985 Residential real estate 236 187,274 187,510 — 85,549 85,549 Consumer loans — 57,073 57,073 — 33,644 33,644 Total Loans $ 7,568 $ 1,162,600 $ 1,170,168 $ 7,716 $ 775,581 $ 783,297
Changes in Accretable Yield on Acquired Loans	Changes in accretable yield on acquired loans with evidence of credit deterioration at the date of acquisition for the three and six months ended June 30, 2016 , and June 30, 2015 , were as follows, in thousands: Balance at March 31, 2016 $ 305 Original yield discount, net, at date of acquisition — Accretion 193 Reclassification from nonaccretable difference (1) (56 ) Balance at June 30, 2016 $ 168 Balance at December 31, 2015 $ 557 Original yield discount, net, at date of acquisitions 19 Accretion 466 Reclassification from nonaccretable difference (1) (58 ) Balance at June 30, 2016 $ 168 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses. Balance at March 31, 2015 $ 352 Original yield discount, net, at date of acquisitions — Accretion 116 Reclassification from nonaccretable difference (1) (162 ) Balance at June 30, 2015 $ 398 Balance at December 31, 2014 $ — Original yield discount, net, at date of acquisitions 352 Accretion 116 Reclassification from nonaccretable difference (1) (162 ) Balance at June 30, 2015 $ 398 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses.

Allowance for Loan and Lease 24

Allowance for Loan and Lease Losses (Tables)	6 Months Ended
	Jun. 30, 2016
Loans and Leases Receivable, Allowance [Abstract]
Changes in the Allowance for Loan and Leases Losses	Changes in the allowance for loan and lease losses for the three and six months ended June 30, 2016 , and June 30, 2015 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at March 31, 2016 $ 16,374 $ 20,495 $ 4,028 $ 1,851 $ 6,990 $ 49,738 Charge-offs (249 ) (1,103 ) — (105 ) (1,494 ) (2,951 ) Recoveries 143 2,443 4 4 257 2,851 Provision (743 ) 1,133 68 315 1,345 2,118 Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2015 $ 16,095 $ 19,532 $ 3,887 $ 1,934 $ 7,237 $ 48,685 Charge-offs (347 ) (1,415 ) — (142 ) (2,652 ) (4,556 ) Recoveries 319 2,589 7 24 503 3,442 Provision (542 ) 2,262 206 249 2,010 4,185 Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at March 31, 2015 $ 11,688 $ 16,635 $ 3,216 $ 3,745 $ 6,570 $ 41,854 Charge-offs (682 ) (371 ) (275 ) (55 ) (1,351 ) (2,734 ) Recoveries 111 370 2 70 267 820 Provision 1,947 974 733 339 1,681 5,674 Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2014 $ 11,909 $ 15,898 $ 3,295 $ 3,741 $ 6,606 $ 41,449 Charge-offs (956 ) (704 ) (551 ) (113 ) (2,414 ) (4,738 ) Recoveries 431 496 24 107 500 1,558 Provision 1,680 1,918 908 364 2,475 7,345 Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614

Goodwill, Core Deposit Premiu25

Goodwill, Core Deposit Premium and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets	The gross carrying amount of other intangible assets and the associated accumulated amortization at June 30, 2016 , and December 31, 2015 , are presented in the table below, in thousands: June 30, 2016 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizing intangible assets: Core deposit intangibles $ 43,504 $ 18,632 $ 24,872 $ 37,118 $ 15,460 $ 21,658 Mortgage servicing rights 48,355 17,068 31,287 45,744 15,430 30,314 Customer relationship intangible 1,177 836 341 1,177 815 362 Commercial servicing rights 6,280 1,913 4,367 5,685 1,074 4,611 Total $ 99,316 $ 38,449 $ 60,867 $ 89,724 $ 32,779 $ 56,945
Schedule of Estimated Future Amortization Expense of Amortizable Intangible Assets	The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands: Core Deposit Intangibles Mortgage Servicing Rights Customer Relationship Intangible Commercial Servicing Rights Total Six months ending December 31, 2016 $ 2,460 $ 5,135 $ 20 $ 492 $ 8,107 Year ending December 31, 2017 4,419 6,538 40 951 11,948 2018 3,909 5,604 39 858 10,410 2019 3,426 4,670 37 694 8,827 2020 2,981 3,736 37 503 7,257 2021 2,463 2,802 36 429 5,730 Thereafter 5,214 2,802 132 440 8,588 Total $ 24,872 $ 31,287 $ 341 $ 4,367 $ 60,867
Summary of Changes in Servicing Rights	The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the six months ended June 30, 2016 , and June 30, 2015 : 2016 2015 Balance at January 1, $ 4,611 $ — Purchased commercial servicing rights 190 4,255 Originations 404 141 Amortization (792 ) (452 ) Valuation allowance on commercial servicing rights (46 ) — Balance at June 30, $ 4,367 $ 3,944 Fair value of commercial servicing rights $ 4,791 $ 4,429 Commercial servicing rights, net to servicing portfolio 2.44 % 2.87 % The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2016 , and June 30, 2015 : 2016 2015 Balance at January 1, $ 30,314 $ 24,984 Originations 5,799 7,015 Amortization (4,826 ) (4,360 ) Balance at June 30, $ 31,287 $ 27,639 Fair value of mortgage servicing rights $ 39,881 $ 36,971 Mortgage servicing rights, net to servicing portfolio 0.74 % 0.73 %
Schedule of Servicing Asset at Fair Value and Amortized Cost	The following table summarizes, in thousands, the book value, the fair value of each tranche of the commercial servicing rights and any recorded valuation allowance at each respective subsidiary at June 30, 2016 and December 31, 2015: June 30, 2016 Book Value- Less than 20 Years Fair Value- Less than 20 Years Impairment- Less than 20 Years Book Value- More than 20 Years Fair Value- More than 20 Years Impairment- More than 20 Years Centennial Bank and Trust $ 28 $ 30 $ — $ 140 $ 148 $ — Premier Valley Bank 191 208 — 387 349 38 Wisconsin Bank & Trust 917 909 8 2,750 3,147 — Total $ 1,136 $ 1,147 $ 8 $ 3,277 $ 3,644 $ 38 December 31, 2015 Centennial Bank and Trust $ — $ — $ — $ — $ — $ — Premier Valley Bank 189 200 — 417 432 — Wisconsin Bank & Trust 1,048 1,097 — 2,957 3,173 — Total $ 1,237 $ 1,297 $ — $ 3,374 $ 3,605 $ —

Derivative Financial Instrume26

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Balance Sheet Category and Fair Values of Derivative Instruments	The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at June 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity June 30, 2016 Interest rate swap $ — $ — Other liabilities — % — % 04/20/2016 Interest rate swap 25,000 (1,556 ) Other liabilities 0.656 % 2.255 % 03/17/2021 Interest rate swap 20,000 (387 ) Other liabilities 0.673 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,907 ) Other liabilities 0.627 % 3.355 % 01/07/2020 Interest rate swap 10,000 (248 ) Other liabilities 0.640 % 1.674 % 03/26/2019 Interest rate swap 10,000 (244 ) Other liabilities 0.656 % 1.658 % 03/18/2019 Interest rate swap 39,667 (594 ) Other liabilities 2.945 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (1,481 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (1,519 ) Other liabilities — % 2.352 % 03/01/2024 December 31, 2015 Interest rate swap $ 8,947 $ (57 ) Other liabilities 3.152 % 5.140 % 04/20/2016 Interest rate swap 25,000 (713 ) Other liabilities 0.526 % 2.255 % 03/17/2021 Interest rate swap 20,000 (600 ) Other liabilities 0.414 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,582 ) Other liabilities 0.323 % 3.355 % 01/07/2020 Interest rate swap 10,000 (83 ) Other liabilities 0.603 % 1.674 % 03/26/2019 Interest rate swap 10,000 (83 ) Other liabilities 0.526 % 1.658 % 03/18/2019 Interest rate swap (1) 20,000 (146 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (176 ) Other liabilities — % 2.352 % 03/01/2024 (1) This swap is a forward starting swap with a weighted average pay rate of 2.390% beginning on June 15, 2017. No interest payments are required related to this swap until September 15, 2017. (2) This swap is a forward starting swap with a weighted average pay rate of 2.352% beginning on March 1, 2017. No interest payments are required on this swap until June 1, 2017. The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as loan swaps at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate June 30, 2016 Receive fixed-pay floating interest rate swap $ 51,505 $ 3,699 Other assets 4.82 % 3.27 % Pay fixed-receive floating interest rate swap 51,505 (3,699 ) Other liabilities 3.27 % 4.82 % December 31, 2015 Receive fixed-pay floating interest rate swap $ 15,782 $ 663 Other assets 5.08 % 3.07 % Pay fixed-receive floating interest rate swap 15,782 (663 ) Other liabilities 3.07 % 5.08 % The table below identifies the notional amount, fair value and balance sheet category of Heartland's fair value hedges at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2016 Fair value hedges $ 41,200 $ (4,681 ) Other liabilities December 31, 2015 Fair value hedges $ 13,805 $ (621 ) Other liabilities
Gains (Losses) on Derivative Instruments	The table below identifies the gains and losses recognized on Heartland's fair value hedges for the three and six months ended June 30, 2016 , and June 30, 2015 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2016 Fair value hedges $ (888 ) Interest income Six Months Ended June 30, 2016 Fair value hedges $ (2,110 ) Interest income Three Months Ended June 30, 2015 Fair value hedges $ — Interest income Six Months Ended June 30, 2015 Fair value hedges $ — Interest income The table below identifies the gains and losses recognized on Heartland's derivative instruments designated as cash flow hedges for the three and six months ended June 30, 2016 , and June 30, 2015 , 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) Three Months Ended June 30, 2016 Interest rate swaps $ (1,579 ) Interest expense $ (465 ) Other income $ — Six Months Ended June 30, 2016 Interest rate swaps $ (4,496 ) Interest expense $ (971 ) Other income $ — Three Months Ended June 30, 2015 Interest rate swaps $ 2,068 Interest expense $ (559 ) Other income $ — Six Months Ended June 30, 2015 Interest rate swaps $ 1,178 Interest expense $ (1,123 ) Other income $ —
Balance Sheet Category and Fair Values of Embedded Derivatives	The following table identifies, in thousands, the notional amount, fair value, balance sheet category and income statement category for the change in fair value of the convertible debt option as of June 30, 2016 : Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter- to-Date Gain (Loss) Recognized Year- to-Date June 30, 2016 Embedded conversion option $ 2,000 $ (619 ) Other liabilities Other noninterest income $ (197 ) $ (297 ) The table below identifies the notional amount, fair value and balance sheet category of Heartland's embedded derivatives at June 30, 2016 and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter-to-Date Gain (Loss) Recognized Year-to-Date June 30, 2016 Embedded derivatives $ 14,786 $ 1,990 Other assets Other noninterest income $ 144 $ 416 December 31, 2015 Embedded derivatives $ 15,020 $ 1,574 Other assets Other noninterest income $ — $ —
Schedule of Other Derivatives Not Designated as Hedging Instruments, Balance Sheet and Income Category	The table below identifies the balance sheet category and fair values of Heartland's other free standing derivative instruments not designated as hedging instruments at June 30, 2016 , and December 31, 2015 , in thousands: Balance Sheet Category Notional Amount Fair Value June 30, 2016 Interest rate lock commitments (mortgage) Other assets $ 142,118 $ 6,864 Forward commitments Other assets 55,000 469 Forward commitments Other liabilities 247,171 (2,502 ) Undesignated interest rate swaps Other liabilities 22,814 (2,213 ) December 31, 2015 Interest rate lock commitments (mortgage) Other assets $ 99,665 $ 3,168 Forward commitments Other assets 118,378 523 Forward commitments Other liabilities 136,709 (315 ) Undesignated interest rate swaps Other liabilities 50,975 (3,677 ) The table below identifies the income statement category of the gains and losses recognized in income on Heartland's other free standing derivative instruments not designated as hedging instruments for the three and six months ended June 30, 2016 , and June 30, 2015 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended June 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 1,081 Forward commitments Gains on sale of loans held for sale (753 ) Undesignated interest rate swaps Other noninterest income (54 ) Six Months Ended June 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 5,808 Forward commitments Gains on sale of loans held for sale (2,242 ) Undesignated interest rate swaps Other noninterest income (370 ) Three Months Ended June 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (1,712 ) Forward commitments Gains on sale of loans held for sale 3,700 Six Months Ended June 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 3,832 Forward commitments Gains on sale of loans held for sale 3,575

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2016
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 June 30, 2016 , and December 31, 2015 , 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 June 30, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 5,101 $ 535 $ 4,566 $ — Mortgage-backed securities 1,220,732 — 1,219,000 1,732 Obligations of states and political subdivisions 326,422 — 326,422 — Corporate debt securities 830 — 500 330 Equity securities 13,507 — 13,507 — Derivative financial instruments (1) 5,689 — 5,689 — Interest rate lock commitments 6,864 — — 6,864 Forward commitments 469 — 469 — Total assets at fair value $ 1,579,614 $ 535 $ 1,570,153 $ 8,926 Liabilities Derivative financial instruments (2) $ 19,148 $ — $ 19,148 $ — Forward commitments 2,502 — 2,502 — Total liabilities at fair value $ 21,650 $ — $ 21,650 $ — December 31, 2015 Assets Securities available for sale U.S. government corporations and agencies $ 25,766 $ 519 $ 25,247 $ — Mortgage-backed securities 1,242,702 — 1,240,663 2,039 Obligations of states and political subdivisions 295,982 — 295,982 — Corporate debt securities 846 — — 846 Equity securities 13,138 — 13,138 — Derivative financial instruments (1) 2,237 — 2,237 — Interest rate lock commitments 3,168 — — 3,168 Forward commitments 523 — 523 — Total assets at fair value $ 1,584,362 $ 519 $ 1,577,790 $ 6,053 Liabilities Derivative financial instruments (2) $ 8,401 $ — $ 8,401 $ — Forward commitments 315 — 315 — Total liabilities at fair value $ 8,716 $ — $ 8,716 $ — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps, embedded conversion options and free standing derivative instruments
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 June 30, 2016 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,333 $ — $ — $ 1,333 $ — Commercial real estate 14,113 — — 14,113 998 Agricultural and agricultural real estate 105 — — 105 — Residential real estate 3,508 — — 3,508 — Consumer 1,845 — — 1,845 15 Total collateral dependent impaired loans $ 20,904 $ — $ — $ 20,904 $ 1,013 Other real estate owned $ 11,003 $ — $ — $ 11,003 $ 548 Premises, furniture and equipment held for sale $ 3,889 $ — $ 3,889 $ — Commercial servicing rights $ 1,258 $ — $ — $ 1,258 $ 46 Fair Value Measurements at December 31, 2015 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 597 $ — $ — $ 597 $ 82 Commercial real estate 1,522 — — 1,522 86 Agricultural and agricultural real estate — — — — — Residential real estate 2,330 — — 2,330 104 Consumer 1,905 — — 1,905 — Total collateral dependent impaired loans $ 6,354 $ — $ — $ 6,354 $ 272 Other real estate owned $ 11,524 $ — $ — $ 11,524 $ 5,520 Premises, furniture and equipment held for sale $ 3,889 $ — $ — $ 3,889 $ — Commercial servicing rights $ — $ — $ — $ — $ —
Fair Value Inputs, Assets, 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: Fair Value at 6/30/16 Valuation Unobservable Range Z-TRANCHE Securities $ 1,732 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 19.85 - 34.02% (30.17%) Actual deferrals 9.57 - 22.12% (13.34%) Corporate debt securities 330 Discounted cash flows Bank analysis (1) Interest rate lock commitments 6,864 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,889 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial servicing rights 1,258 Discounted cash flows Third party valuation (4) Other real estate owned 11,003 Modified appraised value Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 1,333 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 14,113 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate 105 Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 3,508 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,845 Modified appraised value Third party valuation (3) Valuation discount (3) (1) The unobservable input is the bank analysis market using Moody's Global Bank Rating Methodology. The analysis takes into consideration various performance metrics as well as yield on the debt securities and credit risk analysis. (2) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data; therefore providing a range would not be meaningful. The weighted average closing ratio at June 30, 2016, was 87%. (3) 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. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. Fair Value at 12/31/15 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ 2,039 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 22.20 - 33.55% (30.60%) Actual deferrals 10.75 - 21.82% (13.36%) Corporate debt securities 846 Discounted cash flows Bank analysis (1) Interest rate lock commitments 3,168 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,889 Modified appraised value Third party appraisal (3) Commercial servicing rights — Discounted cash flows Third party valuation (4) Other real estate owned 11,524 Modified appraised value Disposal costs (3) Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 597 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 1,522 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate — Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 2,330 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,905 Modified appraised value Third party valuation (3) Valuation discount (3) (1) The unobservable input is the bank analysis market using Moody's Global Bank Rating Methodology. The analysis takes into consideration various performance metrics as well as yield on the debt securities and credit risk analysis. (2) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data; therefore providing a range would not be meaningful. The weighted average closing ratio at December 31, 2015, was 86%. (3) 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. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The changes in fair value of the Z-TRANCHE, a Level 3 asset, that is measured on a recurring basis are summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 2,039 $ 4,947 Total gains (losses): Included in earnings — (3,038 ) Included in other comprehensive income (307 ) 982 Purchases, sales and settlements: Purchases — 6 Sales — (736 ) Settlements — (122 ) Balance at period end $ 1,732 $ 2,039 The changes in fair value of the corporate debt securities, Level 3 assets, that are measured on a recurring basis is summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 846 $ — Total gains (losses): Included in earnings 121 — Included in other comprehensive income (91 ) 106 Purchases, acquired, sales and settlements: Purchases — — Acquired — 740 Sales (546 ) — Settlements — — Balance at period end $ 330 $ 846 The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments and are measured on a recurring basis, are summarized in the following table, in thousands: For the Six Months Ended June 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 3,168 $ 2,496 Total gains (losses) included in earnings 5,808 288 Issuances 142 5,428 Settlements (2,254 ) (5,044 ) Balance at period end $ 6,864 $ 3,168
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 June 30, 2016 Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 229,950 $ 229,950 $ 229,950 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,566,592 1,566,592 535 1,563,995 2,062 Held to maturity 270,423 292,854 — 292,854 — Other investments 22,680 22,680 — 22,445 235 Loans held for sale 82,538 82,538 — 82,538 — Loans, net: Commercial 1,271,131 1,265,814 — 1,264,481 1,333 Commercial real estate 2,619,284 2,619,499 — 2,605,386 14,113 Agricultural and agricultural real estate 477,450 480,805 — 480,700 105 Residential real estate 641,006 637,007 — 633,499 3,508 Consumer 421,631 425,110 — 423,265 1,845 Total Loans, net 5,430,502 5,428,235 — 5,407,331 20,904 Derivative financial instruments (1) 5,689 5,689 — 5,689 — Interest rate lock commitments 6,864 6,864 — — 6,864 Forward commitments 469 469 — 469 — Financial liabilities: Deposits Demand deposits 2,149,911 2,149,911 — 2,149,911 — Savings deposits 3,691,791 3,691,791 — 3,691,791 — Time deposits 995,870 995,870 — 995,870 — Short term borrowings 303,707 303,707 — 303,707 — Other borrowings 296,895 297,384 — 297,384 — Derivative financial instruments (2) 19,148 19,148 — 19,148 — Forward commitments 2,502 2,502 — 2,502 — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps, embedded conversion options and free standing derivative instruments Fair Value Measurements at December 31, 2015 Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 258,799 $ 258,799 $ 258,799 $ — $ — Time deposits in other financial institutions 2,355 2,355 2,355 — — Securities: Available for sale 1,578,434 1,578,434 519 1,575,030 2,885 Held to maturity 279,117 294,513 — 294,513 — Other investments 21,443 21,443 — 21,208 235 Loans held for sale 74,783 74,783 — 74,783 — Loans, net: Commercial 1,262,612 1,257,355 — 1,256,758 597 Commercial real estate 2,305,908 2,304,716 — 2,303,194 1,522 Agricultural and agricultural real estate 468,533 469,485 — 469,485 — Residential real estate 536,190 531,931 — 529,601 2,330 Consumer 379,558 382,579 — 380,674 1,905 Total Loans, net 4,952,801 4,946,066 — 4,939,712 6,354 Derivative financial instruments (1) 2,237 2,237 — 2,237 — Interest rate lock commitments 3,168 3,168 — — 3,168 Forward commitments 523 523 — 523 — Financial liabilities: Deposits Demand deposits 1,914,141 1,914,141 — 1,914,141 — Savings deposits 3,367,479 3,367,479 — 3,367,479 — Time deposits 1,124,203 1,124,203 — 1,124,203 — Short term borrowings 293,898 293,898 — 293,898 — Other borrowings 263,214 281,271 — 281,271 — Derivative financial instruments (2) 8,401 8,401 — 8,401 — Forward commitments 315 315 — 315 — (1) Includes embedded derivatives and loan swaps (2) Includes cash flow hedges, fair value hedges, loan swaps and free standing derivative instruments

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting	The following tables present financial information from Heartland's operating segments for the three- and six -month periods ended June 30, 2016 , and June 30, 2015 , in thousands. Three Months Ended 2016 2015 Community and Other Banking Retail Mortgage Banking Total Community and Other Banking Retail Mortgage Banking Total Net interest income $ 71,895 $ 1,223 $ 73,118 $ 55,988 $ 1,656 $ 57,644 Provision for loan losses 2,118 — 2,118 5,674 — 5,674 Total noninterest income 19,899 11,127 31,026 15,603 15,058 30,661 Total noninterest expense 59,694 11,326 71,020 48,987 14,495 63,482 Income before taxes $ 29,982 $ 1,024 $ 31,006 $ 16,930 $ 2,219 $ 19,149 Average Loans, for the period $ 5,507,542 $ 75,336 $ 5,582,878 $ 4,340,289 $ 106,835 $ 4,447,124 Segment Assets, at period end $ 8,082,153 $ 122,248 $ 8,204,401 $ 6,579,225 $ 137,782 $ 6,717,007 Six Months Ended 2016 2015 Community Retail Total Community Retail Total Net interest income $ 143,478 $ 2,347 $ 145,825 $ 108,877 $ 2,697 $ 111,574 Provision for loan losses 4,185 — 4,185 7,345 — 7,345 Total noninterest income 38,436 22,168 60,604 32,664 28,660 61,324 Total noninterest expense 119,433 21,896 141,329 96,446 26,650 123,096 Income (loss) before taxes $ 58,296 $ 2,619 $ 60,915 $ 37,750 $ 4,707 $ 42,457 Average Loans, for the period $ 5,401,867 $ 68,623 $ 5,470,490 $ 4,265,624 $ 92,231 $ 4,357,855 Segment Assets, at period end $ 8,082,153 $ 122,248 $ 8,204,401 $ 6,579,225 $ 137,782 $ 6,717,007

Basis of Presentation (Earnings

Basis of Presentation (Earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share
Net income attributable to Heartland	$ 20,970	$ 15,160	$ 40,979	$ 30,869
Preferred dividends	(52)	(204)	(220)	(408)
Interest expense on convertible preferred debt	31	0	31	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 20,949	$ 14,956	$ 40,790	$ 30,461
Weighted average common shares outstanding for basic earnings per share	24,524	20,599	24,093	20,408
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units	451	278	448	274
Weighted average common shares for diluted earnings per share	24,975	20,877	24,541	20,682
Earnings per common share — basic (in dollars per share)	$ 0.85	$ 0.73	$ 1.69	$ 1.49
Earnings per common share — diluted (in dollars per share)	$ 0.84	$ 0.72	$ 1.66	$ 1.47
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation (in shares)	0	0	0	0

Basis of Presentation (Stock-ba

Basis of Presentation (Stock-based compensation) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit from equity based awards			$ 1,100,000	$ 651,000
Options granted (in shares)			0	0
Vested options (in shares)			89,450	156,951
Vested options, weighted average exercise price (in dollars per share)			$ 24.34	$ 24.18
Vested options, weighted average remaining contractual life			1 year 12 days
Intrinsic value for vested options			$ 979,000
Intrinsic value for the total of all options exercised			$ 295,000
Maximum exercise period			10 years
Cash received from options exercised			$ 824,000	$ 1,300,000
Options vested during period (in shares)			0	0
Prior to 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Typical options expiration period after date of grant			10 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs			$ 2,400,000	$ 1,900,000
Share-based unrecognized compensation costs			4,400,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs			0	$ 0
Share-based unrecognized compensation costs			$ 0
Options granted (in shares)				0
Stock Options | Prior to 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting periods			5 years
Stock Options | Period One | Prior to 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting periods			3 years
Stock Options | Period Two | Prior to 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting periods			4 years
Stock Options | Period Three | Prior to 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting periods			5 years
Long-Term Incentive Plan 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares for issuance under future awards			548,079
Long-Term Incentive Plan 2012 | Time-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	72,644	78,220
Share-based compensation, award vesting periods			3 years	5 years
Long-Term Incentive Plan 2012 | Performance-Based RSUs | End of Performance Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	35,516	39,075
Share-based compensation, award vesting periods			2 years
Long-Term Incentive Plan 2012 | Performance-Based RSUs | Performance Period Ended December 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	11,408
Share-based compensation, award vesting periods			3 years
Long-Term Incentive Plan 2012 | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)			22,153	22,648

Basis of Presentation (Summary

Basis of Presentation (Summary of RSUs activity) (Details) - RSUs - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Shares
Outstanding at beginning of period (in shares)	353,195	396,555
Granted (in shares)	141,721	139,943
Vested (in shares)	(117,898)	(151,681)
Forfeited (in shares)	(10,892)	(11,198)
Outstanding at end of period (in shares)	366,126	373,619
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 25.53	$ 21.48
Granted (in dollars per share)	29.79	28.90
Vested (in dollars per share)	23.40	17.98
Forfeited (in dollars per share)	27.13	25.14
Outstanding at end of period (in dollars per share)	$ 27.60	$ 25.55

Basis of Presentation (Summar32

Basis of Presentation (Summary of stock options activity) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Shares
Outstanding at beginning of period (in shares)	125,950	215,851
Granted (in shares)	0	0
Exercised (in shares)	(35,000)	(56,650)
Forfeited (in shares)	(1,500)	(2,250)
Outstanding at end of period (in shares)	89,450	156,951
Options exercisable at end of period (in shares)	89,450	156,951
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 24.08	$ 23.85
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	23.53	22.85
Forfeited (in dollars per share)	21.10	23.88
Outstanding at end of period (in dollars per share)	24.34	24.18
Options exercisable at end of period (in dollars per share)	$ 24.34	$ 24.18

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Feb. 05, 2016	Nov. 30, 2015	Sep. 11, 2015	Aug. 21, 2015	Jan. 16, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Assets						$ 8,204,401	$ 7,694,754	$ 6,717,007
Deposits						6,837,572	6,405,823
Goodwill						127,699	97,852
Nonaccrual loans						55,732	37,874
Premises, furniture and equipment held for sale						3,889	$ 3,889
CIC Bancshares, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 76,882
Purchase price paid by delivery of shares of common stock	2,003,235
Purchase price in cash	$ 15,672
Other borrowings	7,924
Assets	772,600
Loans	581,500
Deposits	648,100
Goodwill	29,848
Pre-tax merger related expenses						$ 551
Nonaccrual loans	1,600
CIC Bancshares, Inc. | Preferred Stock
Business Acquisition [Line Items]
Convertible preferred stock issued, fair value	$ 3,800
Premier Valley Bank
Business Acquisition [Line Items]
Total purchase price		$ 95,500
Purchase price paid by delivery of shares of common stock		1,758,543
Purchase price in cash		$ 28,500
Assets		692,700
Loans		389,800
Deposits		622,700
Goodwill		$ 41,000
First Scottsdale Bank, N.A.
Business Acquisition [Line Items]
Purchase price in cash			$ 17,700
Assets			81,200
Loans			54,700
Deposits			65,900
Goodwill			$ 2,500
Community Bancorporation of New Mexico, Inc.
Business Acquisition [Line Items]
Purchase price in cash				$ 11,100
Assets				166,300
Loans				99,500
Deposits				147,400
Goodwill				213
Premises, furniture and equipment held for sale				$ 3,400
Community Banc-Corp of Sheboygan, Inc.
Business Acquisition [Line Items]
Total purchase price					$ 53,100
Purchase price paid by delivery of shares of common stock					1,970,720
Assets					$ 506,800
Loans					395,000
Deposits					433,900
Goodwill					$ 18,600
Purchase price, percentage of adjusted tangible book value					155.00%

Acquisitions (Acquisition, fair

Acquisitions (Acquisition, fair values) (Details) - USD ($) $ in Thousands	Feb. 05, 2016	Jun. 30, 2016	Dec. 31, 2015
Fair value of liabilities assumed:
Goodwill resulting from acquisition		$ 127,699	$ 97,852
CIC Bancshares, Inc.
Fair value of consideration paid:
Stock, number of shares	2,003,235
Cash	$ 15,672
Total consideration paid	76,882
Fair value of assets acquired:
Cash and due from banks	23,756
Securities:
Securities available for sale	92,831
Other securities	3,486
Loans held to maturity	581,477
Premises, furniture and equipment, net	16,450
Other real estate, net	1,934
Other intangible assets, net	6,576
Other assets	16,276
Total assets	742,786
Fair value of liabilities assumed:
Deposits	648,111
Short term borrowings	35,766
Other borrowings	7,924
Other liabilities	3,951
Total liabilities assumed	695,752
Fair value of net assets acquired	47,034
Goodwill resulting from acquisition	29,848
CIC Bancshares, Inc. | Common Stock
Fair value of consideration paid:
Stock	$ 57,433
Stock, number of shares	2,003,235
CIC Bancshares, Inc. | Preferred Stock
Fair value of consideration paid:
Stock	$ 3,777
Stock, number of shares	3,000

Acquisitions (Pro forma) (Detai

Acquisitions (Pro forma) (Details) - CIC Bancshares, Inc. - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Net interest income	$ 259,531	$ 221,808
Net income available to common shareholders	$ 59,491	$ 41,004
Basic earnings per share (in dollars per share)	$ 2.63	$ 2
Diluted earnings per share (in dollars per share)	$ 2.58	$ 1.96

Securities (Securities availabl

Securities (Securities available for sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,556,884	$ 1,584,703
Gross Unrealized Gains	28,881	15,849
Gross Unrealized Losses	(19,173)	(22,118)
Estimated Fair Value	1,566,592	1,578,434
Total debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,543,726	1,571,561
Gross Unrealized Gains	28,532	15,809
Gross Unrealized Losses	(19,173)	(22,074)
Estimated Fair Value	1,553,085	1,565,296
U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,943	25,847
Gross Unrealized Gains	158	22
Gross Unrealized Losses	0	(103)
Estimated Fair Value	5,101	25,766
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,226,085	1,254,452
Gross Unrealized Gains	13,776	9,134
Gross Unrealized Losses	(19,129)	(20,884)
Estimated Fair Value	1,220,732	1,242,702
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	311,883	290,522
Gross Unrealized Gains	14,583	6,547
Gross Unrealized Losses	(44)	(1,087)
Estimated Fair Value	326,422	295,982
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	815	740
Gross Unrealized Gains	15	106
Gross Unrealized Losses	0	0
Estimated Fair Value	830	846
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,158	13,142
Gross Unrealized Gains	349	40
Gross Unrealized Losses	0	(44)
Estimated Fair Value	$ 13,507	$ 13,138

Securities (Held to maturity se

Securities (Held to maturity securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 270,423	$ 279,117
Gross Unrealized Gains	22,717	15,901
Gross Unrealized Losses	(286)	(505)
Estimated Fair Value	292,854	294,513
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0	4,369
Gross Unrealized Gains	0	306
Gross Unrealized Losses	0	0
Estimated Fair Value	0	4,675
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	270,423	274,748
Gross Unrealized Gains	22,717	15,595
Gross Unrealized Losses	(286)	(505)
Estimated Fair Value	$ 292,854	$ 289,838

Securities (Securities availa38

Securities (Securities available for sale (debt maturities)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in 1 year or less	$ 1,645
Due in 1 to 5 years	15,892
Due in 5 to 10 years	87,334
Due after 10 years	212,770
Total debt securities	317,641
Mortgage-backed securities	1,226,085
Equity securities	13,158
Amortized Cost	1,556,884	$ 1,584,703
Estimated Fair Value
Due in 1 year or less	1,653
Due in 1 to 5 years	16,181
Due in 5 to 10 years	90,004
Due after 10 years	224,515
Total debt securities	332,353
Mortgage-backed securities	1,220,732
Equity securities	13,507
Estimated Fair Value	$ 1,566,592	$ 1,578,434

Securities (Securities held to

Securities (Securities held to maturity (debt maturities)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in 1 year or less	$ 4,380
Due in 1 to 5 years	14,327
Due in 5 to 10 years	87,072
Due after 10 years	164,644
Total debt securities	270,423
Mortgage-backed securities	0
Amortized Cost	270,423	$ 279,117
Estimated Fair Value
Due in 1 year or less	4,448
Due in 1 to 5 years	15,170
Due in 5 to 10 years	92,495
Due after 10 years	180,741
Total debt securities	292,854
Mortgage-backed securities	0
Estimated Fair Value	$ 292,854	$ 294,513

Securities (Realized gain (loss

Securities (Realized gain (loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 318,927	$ 270,688	$ 622,375	$ 526,026
Gross security gains	5,095	3,819	9,653	8,441
Gross security losses	$ 473	$ 709	$ 1,155	$ 978

Securities (Available for sale

Securities (Available for sale securities losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value
Less than 12 months	$ 519,935	$ 821,737
12 months or longer	144,530	147,022
Total	664,465	968,759
Unrealized Losses
Less than 12 months	(14,612)	(16,566)
12 months or longer	(4,561)	(5,552)
Total	(19,173)	(22,118)
Total debt securities
Fair Value
Less than 12 months	519,935	815,171
12 months or longer	144,530	147,022
Total	664,465	962,193
Unrealized Losses
Less than 12 months	(14,612)	(16,522)
12 months or longer	(4,561)	(5,552)
Total	(19,173)	(22,074)
U.S. government corporations and agencies
Fair Value
Less than 12 months	0	22,359
12 months or longer	0	0
Total	0	22,359
Unrealized Losses
Less than 12 months	0	(103)
12 months or longer	0	0
Total	0	(103)
Mortgage-backed securities
Fair Value
Less than 12 months	517,699	724,330
12 months or longer	144,275	139,562
Total	661,974	863,892
Unrealized Losses
Less than 12 months	(14,569)	(15,523)
12 months or longer	(4,560)	(5,361)
Total	(19,129)	(20,884)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	2,236	68,482
12 months or longer	255	7,460
Total	2,491	75,942
Unrealized Losses
Less than 12 months	(43)	(896)
12 months or longer	(1)	(191)
Total	(44)	(1,087)
Corporate debt securities
Fair Value
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Unrealized Losses
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Equity securities
Fair Value
Less than 12 months	0	6,566
12 months or longer	0	0
Total	0	6,566
Unrealized Losses
Less than 12 months	0	(44)
12 months or longer	0	0
Total	$ 0	$ (44)

Securities (Held to maturity 42

Securities (Held to maturity securities losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value
Less than 12 months	$ 1,388	$ 3,646
12 months or longer	1,131	18,033
Total	2,519	21,679
Unrealized Losses
Less than 12 months	(3)	(12)
12 months or longer	(283)	(493)
Total	(286)	(505)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	1,388	3,646
12 months or longer	1,131	18,033
Total	2,519	21,679
Unrealized Losses
Less than 12 months	(3)	(12)
12 months or longer	(283)	(493)
Total	$ (286)	$ (505)

Securities (Other-than-temporar

Securities (Other-than-temporary impairments) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2012	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Recorded as part of gross realized losses:
Credit related OTTI		$ 0	$ 0	$ 0	$ 0
Intent to sell OTTI		0	0	0	0
Total recorded as part of gross realized losses	$ 981	0	0	0	0	$ 769
Recorded directly to AOCI for non-credit related impairment:
Residential mortgage backed securities		0	0	0	0
Reduction of non-credit related impairment related to security sales		0	0	(120)	0
Accretion of non-credit related impairment		0	(24)	(7)	(48)
Total changes to AOCI for non-credit related impairment		0	(24)	(127)	(48)
Total OTTI losses (accretion) recorded on debt securities, net		$ 0	$ (24)	$ (127)	$ (48)

Securities (Other-than-tempor44

Securities (Other-than-temporary impairments) (Narrative) (Details)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2012USD ($)security	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)security
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI write-downs included in earnings, available for sale debt securities	$ 184,000				$ 0		$ 237,000
Total recorded as part of gross realized losses	$ 981,000	$ 0		$ 0	0	$ 0	769,000
Number of investments with OTTI | security	3
OTTI write-downs included in earnings, held to maturity debt securities	$ 797,000						$ 716,000
Number of private label mortgage-backed securities | security							2
Reduction of non-credit related impairment related to security sales		0		0	(120,000)	0
Carrying value of held to maturity securities			$ 4,400,000
Realized gross gains (losses) on held to maturity securities					0
Gross realized gains (losses) on sale of available for sale securities with OTTI write-downs						0
Gross realized losses with OTTI write-downs		473,000		$ 709,000	1,155,000	$ 978,000
Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Credit related OTTI		0			0		$ 1,500,000
Non-credit OTTI		$ 0			0		40,000
Reduction of non-credit related impairment related to security sales							200,000
Mortgage Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI write-downs included in earnings, available for sale debt securities							$ 53,000
Realized gross gains on carrying value of securities			89,000
Realized gross gains (losses) on held to maturity securities			$ 439,000		0
Gross realized losses with OTTI write-downs					$ 0

Securities (Other securities) (

Securities (Other securities) (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Fair value of securities pledged	$ 843	$ 855.8
FHLB	$ 15.5	$ 14.3
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Investment [Line Items]
Percentage of mortgage-backed securities issued by government-sponsored enterprises	77.00%

Loans and Leases (Loans and lea

Loans and Leases (Loans and leases receivable) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 5,484,759	$ 5,003,866
Unearned discount	(686)	(488)
Deferred loan fees	(1,815)	(1,892)
Total net loans and leases receivable held to maturity	5,482,258	5,001,486
Allowance for loan and lease losses	(51,756)	(48,685)
Loans and leases receivable, net	5,430,502	4,952,801
Loans secured by residential real estate property in process of foreclosure	$ 2,400
Threshold period past due, nonperforming status of loans and leases	90 days
Commercial
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 1,287,301	1,279,214
Commercial real estate
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	2,643,578	2,326,360
Agricultural and agricultural real estate
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	480,883	471,870
Residential real estate
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 644,267	539,555
Residential real estate | Minimum
Loans and Leases [Line Items]
Length of loan agreements	10 years
Residential real estate | Maximum
Loans and Leases [Line Items]
Length of loan agreements	30 years
Consumer
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 428,730	386,867
Consumer | Citizens Finance Co | Loans and Finance Receivables
Loans and Leases [Line Items]
Concentration risk, percentage	19.00%
Gross loans and leases receivable held to maturity
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 5,484,759	5,003,866
Commercial and commercial real estate
Loans and Leases [Line Items]
Gross loans and leases receivable held to maturity	$ 3,930,879	$ 3,605,574
Commercial and commercial real estate | Minimum
Loans and Leases [Line Items]
Length of loan agreements	1 year
Commercial and commercial real estate | Maximum
Loans and Leases [Line Items]
Length of loan agreements	5 years

Loans and Leases (Allowance for

Loans and Leases (Allowance for credit losses on financing receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	$ 5,925		$ 2,768
Ending Balance Under ASC 450-20	45,831		45,917
Total	51,756	$ 49,738	48,685	$ 45,614	$ 41,854	$ 41,449
Ending Balance Evaluated for Impairment Under ASC 310-10-35	103,243		80,221
Ending Balance Evaluated for Impairment Under ASC 450-20	5,381,516		4,923,645
Total	5,484,759		5,003,866
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	1,342		471
Ending Balance Under ASC 450-20	14,183		15,624
Total	15,525	16,374	16,095	13,064	11,688	11,909
Ending Balance Evaluated for Impairment Under ASC 310-10-35	7,985		6,919
Ending Balance Evaluated for Impairment Under ASC 450-20	1,279,316		1,272,295
Total	1,287,301		1,279,214
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	2,780		698
Ending Balance Under ASC 450-20	20,188		18,834
Total	22,968	20,495	19,532	17,608	16,635	15,898
Ending Balance Evaluated for Impairment Under ASC 310-10-35	53,481		45,442
Ending Balance Evaluated for Impairment Under ASC 450-20	2,590,097		2,280,918
Total	2,643,578		2,326,360
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	6		0
Ending Balance Under ASC 450-20	4,094		3,887
Total	4,100	4,028	3,887	3,676	3,216	3,295
Ending Balance Evaluated for Impairment Under ASC 310-10-35	14,359		4,612
Ending Balance Evaluated for Impairment Under ASC 450-20	466,524		467,258
Total	480,883		471,870
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	446		393
Ending Balance Under ASC 450-20	1,619		1,541
Total	2,065	1,851	1,934	4,099	3,745	3,741
Ending Balance Evaluated for Impairment Under ASC 310-10-35	21,710		17,790
Ending Balance Evaluated for Impairment Under ASC 450-20	622,557		521,765
Total	644,267		539,555
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	1,351		1,206
Ending Balance Under ASC 450-20	5,747		6,031
Total	7,098	$ 6,990	7,237	$ 7,167	$ 6,570	$ 6,606
Ending Balance Evaluated for Impairment Under ASC 310-10-35	5,708		5,458
Ending Balance Evaluated for Impairment Under ASC 450-20	423,022		381,409
Total	$ 428,730		$ 386,867

Loans and Leases (Financing rec

Loans and Leases (Financing receivables, non accrual status) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Nonaccrual loans	$ 55,732	$ 37,874
Nonaccrual troubled debt restructured loans	1,321	1,781
Total nonaccrual loans	57,053	39,655
Accruing loans past due 90 days or more	0	0
Performing troubled debt restructured loans	$ 9,923	$ 11,075

Loans and Leases (Troubled debt

Loans and Leases (Troubled debt restructuring on loans modified) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)loan	Jun. 30, 2015USD ($)loan	Jun. 30, 2016USD ($)loan	Jun. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2	2	2	3
Pre- Modification Recorded Investment	$ 279	$ 1,141	$ 279	$ 5,133
Post- Modification Recorded Investment	$ 279	$ 1,141	$ 279	$ 5,133
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	1	1	1
Pre- Modification Recorded Investment	$ 100	$ 830	$ 100	$ 830
Post- Modification Recorded Investment	$ 100	$ 830	$ 100	$ 830
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0	1	1
Pre- Modification Recorded Investment	$ 179	$ 0	$ 179	$ 3,992
Post- Modification Recorded Investment	$ 179	$ 0	$ 179	$ 3,992
Commercial and commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2	1	2	2
Pre- Modification Recorded Investment	$ 279	$ 830	$ 279	$ 4,822
Post- Modification Recorded Investment	$ 279	$ 830	$ 279	$ 4,822
Agricultural and agricultural real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1	0	1
Pre- Modification Recorded Investment	$ 0	$ 311	$ 0	$ 311
Post- Modification Recorded Investment	$ 0	$ 311	$ 0	$ 311
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0

Loans and Leases (Troubled de50

Loans and Leases (Troubled debt restructuring with payment defaults) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)loan	Jun. 30, 2015USD ($)loan	Jun. 30, 2016USD ($)loan	Jun. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0	1	0
Recorded Investment | $	$ 100	$ 0	$ 100	$ 0
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0	1	0
Recorded Investment | $	$ 100	$ 0	$ 100	$ 0
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Commercial and commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0	1	0
Recorded Investment | $	$ 100	$ 0	$ 100	$ 0
Agricultural and agricultural real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

Loans and Leases (Troubled de51

Loans and Leases (Troubled debt in text) (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases receivable held to maturity	$ 5,484,759,000	$ 5,003,866,000
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases receivable held to maturity	0
Loss
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases receivable held to maturity	$ 0

Loans and Leases (Loans and l52

Loans and Leases (Loans and leases not covered by share agreements (credit quality indicator)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	$ 5,484,759	$ 5,003,866
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	1,287,301	1,279,214
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	2,643,578	2,326,360
Commercial and commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	3,930,879	3,605,574
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	480,883	471,870
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	644,267	539,555
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	428,730	386,867
Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	5,058,438	4,541,863
Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	1,154,318	1,106,276
Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	2,438,572	2,107,474
Pass | Commercial and commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	3,592,890	3,213,750
Pass | Agricultural and agricultural real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	431,671	435,745
Pass | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	615,626	515,195
Pass | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	418,251	377,173
Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	426,321	462,003
Nonpass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	132,983	172,938
Nonpass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	205,006	218,886
Nonpass | Commercial and commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	337,989	391,824
Nonpass | Agricultural and agricultural real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	49,212	36,125
Nonpass | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	28,641	24,360
Nonpass | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total gross loans and leases receivable held to maturity	$ 10,479	$ 9,694

Loans and Leases (Loans and l53

Loans and Leases (Loans and leases not covered by share agreements (in text)) (Details)	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans delinquent 30 to 89 days, percentage	0.73%	0.31%
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	57.00%	68.00%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	43.00%	32.00%
Nonpass
Financing Receivable, Recorded Investment [Line Items]
Percent of nonaccrual loans	13.00%	8.00%

Loans and Leases (Loans and l54

Loans and Leases (Loans and leases not covered by share agreements (past due financing receivables)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 39,883	$ 15,348
Accruing Loans and Leases, Current	5,387,823	4,948,863
Nonaccrual	57,053	39,655
Total	5,484,759	5,003,866
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,537	2,613
Accruing Loans and Leases, Current	1,279,293	1,273,678
Nonaccrual	5,471	2,923
Total	1,287,301	1,279,214
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	29,527	5,626
Accruing Loans and Leases, Current	2,595,224	2,302,052
Nonaccrual	18,827	18,682
Total	2,643,578	2,326,360
Commercial and commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	32,064	8,239
Accruing Loans and Leases, Current	3,874,517	3,575,730
Nonaccrual	24,298	21,605
Total	3,930,879	3,605,574
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,241	197
Accruing Loans and Leases, Current	468,819	470,455
Nonaccrual	10,823	1,218
Total	480,883	471,870
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,571	2,015
Accruing Loans and Leases, Current	624,327	523,915
Nonaccrual	18,369	13,625
Total	644,267	539,555
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	5,007	4,897
Accruing Loans and Leases, Current	420,160	378,763
Nonaccrual	3,563	3,207
Total	428,730	386,867
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	25,903	11,561
30-59 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,714	2,005
30-59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	17,469	3,549
30-59 Days Past Due | Commercial and commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	19,183	5,554
30-59 Days Past Due | Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,108	143
30-59 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,554	1,900
30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	4,058	3,964
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	13,980	3,787
60-89 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	823	608
60-89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	12,058	2,077
60-89 Days Past Due | Commercial and commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	12,881	2,685
60-89 Days Past Due | Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	133	54
60-89 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	17	115
60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	949	933
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Commercial and commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
90 Days or More Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 0	$ 0

Loans and Leases (Impaired loan

Loans and Leases (Impaired loans not covered by loss share agreements) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Unpaid Contractual Balance
Total impaired loans with a related allowance	$ 25,858	$ 25,858	$ 9,210
Total impaired loans without a related allowance	79,038	79,038	74,644
Total impaired loans held to maturity	104,896	104,896	83,854
Loan Balance
Total impaired loans with a related allowance	25,772	25,772	9,093
Total impaired loans without a related allowance	77,471	77,471	71,128
Total impaired loans held to maturity	103,243	103,243	80,221
Related Allowance Recorded	5,925	5,925	2,768
Average Loan Balance
Total impaired loans with a related allowance	18,167	15,316	11,287
Total impaired loans without a related allowance	77,055	80,544	60,831
Total impaired loans held to maturity	95,222	95,860	72,118
Interest Income Recognized
Total impaired loans with a related allowance	225	249	80
Total impaired loans without a related allowance	531	1,241	2,268
Total impaired loans held to maturity	756	1,490	2,348
Commercial
Unpaid Contractual Balance
Total impaired loans with a related allowance	2,664	2,664	1,192
Total impaired loans without a related allowance	5,332	5,332	5,784
Total impaired loans held to maturity	7,996	7,996	6,976
Loan Balance
Total impaired loans with a related allowance	2,664	2,664	1,160
Total impaired loans without a related allowance	5,321	5,321	5,759
Total impaired loans held to maturity	7,985	7,985	6,919
Related Allowance Recorded	1,342	1,342	471
Average Loan Balance
Total impaired loans with a related allowance	3,598	2,857	524
Total impaired loans without a related allowance	4,709	7,281	7,511
Total impaired loans held to maturity	8,307	10,138	8,035
Interest Income Recognized
Total impaired loans with a related allowance	8	14	12
Total impaired loans without a related allowance	91	261	515
Total impaired loans held to maturity	99	275	527
Commercial real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	16,106	16,106	2,697
Total impaired loans without a related allowance	38,783	38,783	46,099
Total impaired loans held to maturity	54,889	54,889	48,796
Loan Balance
Total impaired loans with a related allowance	16,106	16,106	2,697
Total impaired loans without a related allowance	37,375	37,375	42,745
Total impaired loans held to maturity	53,481	53,481	45,442
Related Allowance Recorded	2,780	2,780	698
Average Loan Balance
Total impaired loans with a related allowance	7,823	6,037	2,539
Total impaired loans without a related allowance	38,928	42,830	38,444
Total impaired loans held to maturity	46,751	48,867	40,983
Interest Income Recognized
Total impaired loans with a related allowance	208	213	19
Total impaired loans without a related allowance	380	785	1,395
Total impaired loans held to maturity	588	998	1,414
Commercial and commercial real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	18,770	18,770	3,889
Total impaired loans without a related allowance	44,115	44,115	51,883
Total impaired loans held to maturity	62,885	62,885	55,772
Loan Balance
Total impaired loans with a related allowance	18,770	18,770	3,857
Total impaired loans without a related allowance	42,696	42,696	48,504
Total impaired loans held to maturity	61,466	61,466	52,361
Related Allowance Recorded	4,122	4,122	1,169
Average Loan Balance
Total impaired loans with a related allowance	11,421	8,894	3,063
Total impaired loans without a related allowance	43,637	50,111	45,955
Total impaired loans held to maturity	55,058	59,005	49,018
Interest Income Recognized
Total impaired loans with a related allowance	216	227	31
Total impaired loans without a related allowance	471	1,046	1,910
Total impaired loans held to maturity	687	1,273	1,941
Agricultural and agricultural real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	111	111	0
Total impaired loans without a related allowance	14,248	14,248	4,612
Total impaired loans held to maturity	14,359	14,359	4,612
Loan Balance
Total impaired loans with a related allowance	111	111	0
Total impaired loans without a related allowance	14,248	14,248	4,612
Total impaired loans held to maturity	14,359	14,359	4,612
Related Allowance Recorded	6	6	0
Average Loan Balance
Total impaired loans with a related allowance	36	18	2,823
Total impaired loans without a related allowance	14,031	10,700	2,287
Total impaired loans held to maturity	14,067	10,718	5,110
Interest Income Recognized
Total impaired loans with a related allowance	0	0	0
Total impaired loans without a related allowance	0	94	175
Total impaired loans held to maturity	0	94	175
Residential real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	3,792	3,792	2,210
Total impaired loans without a related allowance	18,137	18,137	15,802
Total impaired loans held to maturity	21,929	21,929	18,012
Loan Balance
Total impaired loans with a related allowance	3,706	3,706	2,125
Total impaired loans without a related allowance	18,004	18,004	15,665
Total impaired loans held to maturity	21,710	21,710	17,790
Related Allowance Recorded	446	446	393
Average Loan Balance
Total impaired loans with a related allowance	3,351	3,127	2,524
Total impaired loans without a related allowance	17,050	17,082	10,186
Total impaired loans held to maturity	20,401	20,209	12,710
Interest Income Recognized
Total impaired loans with a related allowance	3	7	16
Total impaired loans without a related allowance	49	81	145
Total impaired loans held to maturity	52	88	161
Consumer
Unpaid Contractual Balance
Total impaired loans with a related allowance	3,185	3,185	3,111
Total impaired loans without a related allowance	2,538	2,538	2,347
Total impaired loans held to maturity	5,723	5,723	5,458
Loan Balance
Total impaired loans with a related allowance	3,185	3,185	3,111
Total impaired loans without a related allowance	2,523	2,523	2,347
Total impaired loans held to maturity	5,708	5,708	5,458
Related Allowance Recorded	1,351	1,351	1,206
Average Loan Balance
Total impaired loans with a related allowance	3,359	3,277	2,877
Total impaired loans without a related allowance	2,337	2,651	2,403
Total impaired loans held to maturity	5,696	5,928	5,280
Interest Income Recognized
Total impaired loans with a related allowance	6	15	33
Total impaired loans without a related allowance	11	20	38
Total impaired loans held to maturity	$ 17	$ 35	$ 71

Loans and Leases (Purchased imp

Loans and Leases (Purchased impaired loans (in text)) (Details) - USD ($) $ in Millions	Feb. 05, 2016	Nov. 30, 2015	Sep. 11, 2015	Aug. 21, 2015	Jan. 16, 2015
Centennial Bank
Financing Receivable, Impaired [Line Items]
Loans	$ 594.9
Estimated fair value of loans acquired	$ 581.5
Premier Valley Bank
Financing Receivable, Impaired [Line Items]
Loans		$ 400.5
Estimated fair value of loans acquired		$ 389.8
First Scottsdale Bank, N.A.
Financing Receivable, Impaired [Line Items]
Loans			$ 56.5
Estimated fair value of loans acquired			$ 54.7
Community Bancorporation of New Mexico, Inc.
Financing Receivable, Impaired [Line Items]
Loans				$ 103.7
Estimated fair value of loans acquired				$ 99.5
Community Banc-Corp of Sheboygan, Inc.
Financing Receivable, Impaired [Line Items]
Loans					$ 413.4
Estimated fair value of loans acquired					$ 395

Loans and Leases (Carrying amou

Loans and Leases (Carrying amount loans not covered by loss share agreements) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	$ 7,568	$ 7,716
Non Impaired Purchased Loans	1,162,600	775,581
Total Purchased Loans	1,170,168	783,297
Commercial
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	3,261	0
Non Impaired Purchased Loans	154,959	159,393
Total Purchased Loans	158,220	159,393
Commercial real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	4,071	7,716
Non Impaired Purchased Loans	762,523	494,010
Total Purchased Loans	766,594	501,726
Agricultural and agricultural real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	771	2,985
Total Purchased Loans	771	2,985
Residential real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	236	0
Non Impaired Purchased Loans	187,274	85,549
Total Purchased Loans	187,510	85,549
Consumer
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	57,073	33,644
Total Purchased Loans	$ 57,073	$ 33,644

Loans and Leases (Change in acc

Loans and Leases (Change in accretable yield) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 305	$ 352	$ 557	$ 0
Original yield discount, net, at date of acquisitions	0	0	19	352
Accretion	193	116	466	116
Reclassification from nonaccretable difference	(56)	(162)	(58)	(162)
Balance at end of period	$ 168	$ 398	$ 168	$ 398

Loans and Leases (Carrying am59

Loans and Leases (Carrying amount loans not covered by loss share agreements (in text)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 51,756	$ 48,685
2016 and 2015 Acquisitions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required payments of loans acquired	21,000
Estimated fair value of loans acquired	13,100
Allowance for loan and lease losses	472
Contractually required payments receivable of nonimpaired loans	1,550,000
Estimated fair value of nonimpaired loans acquired	$ 1,510,000

Allowance for Loan and Lease 60

Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 49,738	$ 41,854	$ 48,685	$ 41,449
Charge-offs	(2,951)	(2,734)	(4,556)	(4,738)
Recoveries	2,851	820	3,442	1,558
Provision	2,118	5,674	4,185	7,345
Ending Balance	51,756	45,614	51,756	45,614
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	16,374	11,688	16,095	11,909
Charge-offs	(249)	(682)	(347)	(956)
Recoveries	143	111	319	431
Provision	(743)	1,947	(542)	1,680
Ending Balance	15,525	13,064	15,525	13,064
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	20,495	16,635	19,532	15,898
Charge-offs	(1,103)	(371)	(1,415)	(704)
Recoveries	2,443	370	2,589	496
Provision	1,133	974	2,262	1,918
Ending Balance	22,968	17,608	22,968	17,608
Agricultural
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,028	3,216	3,887	3,295
Charge-offs	0	(275)	0	(551)
Recoveries	4	2	7	24
Provision	68	733	206	908
Ending Balance	4,100	3,676	4,100	3,676
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,851	3,745	1,934	3,741
Charge-offs	(105)	(55)	(142)	(113)
Recoveries	4	70	24	107
Provision	315	339	249	364
Ending Balance	2,065	4,099	2,065	4,099
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	6,990	6,570	7,237	6,606
Charge-offs	(1,494)	(1,351)	(2,652)	(2,414)
Recoveries	257	267	503	500
Provision	1,345	1,681	2,010	2,475
Ending Balance	$ 7,098	$ 7,167	$ 7,098	$ 7,167

Goodwill, Core Deposit Premiu61

Goodwill, Core Deposit Premium and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands	Feb. 05, 2016	Nov. 30, 2015	Sep. 11, 2015	Aug. 21, 2015	Jan. 16, 2015	Jun. 30, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill						$ 127,699	$ 97,852
CIC Bancshares, Inc.
Goodwill [Line Items]
Goodwill	$ 29,848
CIC Bancshares, Inc. | Core Deposits
Goodwill [Line Items]
Intangibles recognized	$ 6,400
Intangibles, amortization period	10 years
CIC Bancshares, Inc. | Commercial Servicing Rights
Goodwill [Line Items]
Intangibles recognized	$ 190
Premier Valley Bank
Goodwill [Line Items]
Goodwill		$ 41,000
Premier Valley Bank | Core Deposits
Goodwill [Line Items]
Intangibles recognized		$ 8,000
Intangibles, amortization period		10 years
Premier Valley Bank | Commercial Servicing Rights
Goodwill [Line Items]
Intangibles recognized		$ 616
First Scottsdale Bank, N.A.
Goodwill [Line Items]
Goodwill			$ 2,500
First Scottsdale Bank, N.A. | Core Deposits
Goodwill [Line Items]
Intangibles recognized			$ 357
Intangibles, amortization period			10 years
Community Bancorporation of New Mexico, Inc.
Goodwill [Line Items]
Goodwill				$ 213
Community Bancorporation of New Mexico, Inc. | Core Deposits
Goodwill [Line Items]
Intangibles recognized				$ 1,700
Intangibles, amortization period				10 years
Community Banc-Corp of Sheboygan, Inc.
Goodwill [Line Items]
Goodwill					$ 18,600
Community Banc-Corp of Sheboygan, Inc. | Core Deposits
Goodwill [Line Items]
Intangibles recognized					$ 6,000
Intangibles, amortization period					10 years
Community Banc-Corp of Sheboygan, Inc. | Commercial Servicing Rights
Goodwill [Line Items]
Intangibles recognized					$ 4,300

Goodwill, Core Deposit Premiu62

Goodwill, Core Deposit Premium and Other Intangible Assets (Carrying amount of intangible assets (incl accumulated amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 99,316	$ 89,724
Accumulated Amortization	38,449	32,779
Net Carrying Amount	60,867	56,945
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,504	37,118
Accumulated Amortization	18,632	15,460
Net Carrying Amount	24,872	21,658
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	48,355	45,744
Accumulated Amortization	17,068	15,430
Net Carrying Amount	31,287	30,314
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,177	1,177
Accumulated Amortization	836	815
Net Carrying Amount	341	362
Commercial servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,280	5,685
Accumulated Amortization	1,913	1,074
Net Carrying Amount	$ 4,367	$ 4,611

Goodwill, Core Deposit Premiu63

Goodwill, Core Deposit Premium and Other Intangible Assets (Estimated future amortization expense for amortizable intangible assets) (Details) $ in Thousands	Jun. 30, 2016USD ($)
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2016	$ 8,107
Year ending December 31,
2,017	11,948
2,018	10,410
2,019	8,827
2,020	7,257
2,021	5,730
Thereafter	8,588
Total	60,867
Core deposit intangibles
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2016	2,460
Year ending December 31,
2,017	4,419
2,018	3,909
2,019	3,426
2,020	2,981
2,021	2,463
Thereafter	5,214
Total	24,872
Mortgage servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2016	5,135
Year ending December 31,
2,017	6,538
2,018	5,604
2,019	4,670
2,020	3,736
2,021	2,802
Thereafter	2,802
Total	31,287
Customer relationship intangible
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2016	20
Year ending December 31,
2,017	40
2,018	39
2,019	37
2,020	37
2,021	36
Thereafter	132
Total	341
Commercial servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2016	492
Year ending December 31,
2,017	951
2,018	858
2,019	694
2,020	503
2,021	429
Thereafter	440
Total	$ 4,367

Goodwill, Core Deposit Premiu64

Goodwill, Core Deposit Premium and Other Intangible Assets (Mortgage and commercial loans servicing) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Valuation servicing rights in tranches [Line Items]
Mortgage loans serviced for others	$ 4,200,000,000		$ 4,200,000,000		$ 4,060,000,000
Custodial escrow balances maintained	23,600,000		23,600,000		19,200,000
Loans serviced	35,654,000		35,654,000		34,926,000
Valuation allowance					0
Mortgage Servicing Rights
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	39,881,000	$ 36,971,000	$ 39,881,000	$ 36,971,000	$ 40,900,000
Prepayment rate			11.84%		10.65%
Discount rate			9.27%		9.25%
Fees collected for servicing of mortgage loans	3,000,000	2,600,000	$ 5,900,000	$ 5,000,000
Mortgage Servicing Rights | Minimum
Valuation servicing rights in tranches [Line Items]
Average cap rate			0.88%	0.65%
Mortgage Servicing Rights | Maximum
Valuation servicing rights in tranches [Line Items]
Average cap rate			1.35%	1.38%
Mortgage Servicing Rights 15-year Tranche
Valuation servicing rights in tranches [Line Items]
Servicing asset, agreement term			15 years
Mortgage Servicing Rights 30-year Tranche
Valuation servicing rights in tranches [Line Items]
Servicing asset, agreement term			30 years
Commercial Servicing Rights
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	4,791,000	4,429,000	$ 4,791,000	$ 4,429,000
Fees collected for servicing of mortgage loans	375,000	$ 360,000	455,000	$ 360,000
Loans serviced	179,000,000		$ 179,000,000
Commercial Servicing Rights | Minimum
Valuation servicing rights in tranches [Line Items]
Prepayment rate			6.92%		7.33%
Discount rate			11.68%		12.35%
Average cap rate			0.031%	0.018%
Commercial Servicing Rights | Maximum
Valuation servicing rights in tranches [Line Items]
Prepayment rate			7.67%		8.10%
Discount rate			12.68%		13.49%
Average cap rate			0.0445%	0.0445%
Commercial Servicing Rights Less Than 20 Years
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	1,147,000		$ 1,147,000		$ 1,297,000
Servicing asset, agreement term			20 years
Valuation allowance			$ 8,000		0
Commercial Servicing Rights More Than 20 Years
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	$ 3,644,000		$ 3,644,000		3,605,000
Servicing asset, agreement term			20 years
Valuation allowance			$ 38,000		$ 0

Goodwill, Core Deposit Premiu65

Goodwill, Core Deposit Premium and Other Intangible Assets (Changes in capitalized mortgage and commercial servicing rights) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Servicing Asset at Fair Value, Amount [Roll Forward]
Valuation allowance on commercial servicing rights	$ (46)	$ 0	$ (46)	$ 0
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period			30,314	24,984
Originations			5,799	7,015
Amortization			(4,826)	(4,360)
Balance at end of period	31,287	27,639	31,287	27,639
Fair value of servicing rights	39,881	36,971	$ 39,881	$ 36,971	$ 40,900
Servicing rights, net to servicing portfolio (as a percent)			0.74%	0.73%
Commercial servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period			$ 4,611	$ 0
Purchased commercial servicing rights			190	4,255
Originations			404	141
Amortization			(792)	(452)
Valuation allowance on commercial servicing rights			(46)	0
Balance at end of period	4,367	3,944	4,367	3,944
Fair value of servicing rights	$ 4,791	$ 4,429	$ 4,791	$ 4,429
Servicing rights, net to servicing portfolio (as a percent)			2.44%	2.87%

Goodwill, Core Deposit Premiu66

Goodwill, Core Deposit Premium and Other Intangible Assets (Book value, fair value of commercial serving rights and impairment) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Impairment		$ 0
Less than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	$ 1,136,000	1,237,000
Fair Value	1,147,000	1,297,000
Impairment	8,000	0
Less than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	28,000	0
Fair Value	30,000	0
Impairment	0	0
Less than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	191,000	189,000
Fair Value	208,000	200,000
Impairment	0	0
Less than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	917,000	1,048,000
Fair Value	909,000	1,097,000
Impairment	8,000	0
More than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	3,277,000	3,374,000
Fair Value	3,644,000	3,605,000
Impairment	38,000	0
More than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	140,000	0
Fair Value	148,000	0
Impairment	0	0
More than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	387,000	417,000
Fair Value	349,000	432,000
Impairment	38,000	0
More than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	2,750,000	2,957,000
Fair Value	3,147,000	3,173,000
Impairment	$ 0	$ 0

Derivative Financial Instrume67

Derivative Financial Instruments (Cash collateral on derivative financial instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Cash pledged as collateral	$ 7,600	$ 5,300
Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 79

Derivative Financial Instrume68

Derivative Financial Instruments (Estimated cash payments and reclassification to interest expense) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in net unrealized losses on cash flow hedges	$ 971
Estimated amount to be reclassified from accumulated other comprehensive income to interest expense within the next twelve months	$ 1,900

Derivative Financial Instrume69

Derivative Financial Instruments (Executed interest rate swap) (Details) - Derivative Financial Instruments $ in Millions	Jun. 30, 2016USD ($)transaction	May 10, 2016USD ($)	Mar. 31, 2015USD ($)transaction	Apr. 20, 2011USD ($)
Derivative [Line Items]
Derivative, notional amount		$ 40		$ 15
Heartland Financial Statutory Trust VI
Derivative [Line Items]
Derivative, notional amount			$ 20
Number of swap transactions | transaction			2
Cash Flow Hedges
Derivative [Line Items]
Derivative, notional amount	$ 85
Number of swap transactions | transaction	5
Cash Flow Hedges | Heartland Financial Statutory Trust IV, V and VII
Derivative [Line Items]
Derivative, notional amount	$ 65
Cash Flow Hedges | Morrill Statutory Trust I and II
Derivative [Line Items]
Derivative, notional amount	$ 20

Derivative Financial Instrume70

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) - Other liabilities - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Interest Rate Swap due April 20, 2016
Derivatives, Fair Value [Line Items]
Notional Amount	$ 0	$ 8,947
Fair Value	$ 0	$ (57)
Receive Rate	0.00%	3.152%
Weighted Average Pay Rate	0.00%	5.14%
Interest Rate Swap due March 17, 2021
Derivatives, Fair Value [Line Items]
Notional Amount	$ 25,000	$ 25,000
Fair Value	$ (1,556)	$ (713)
Receive Rate	0.656%	0.526%
Weighted Average Pay Rate	2.255%	2.255%
Interest Rate Swap due March 1, 2017
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (387)	$ (600)
Receive Rate	0.673%	0.414%
Weighted Average Pay Rate	3.22%	3.22%
Interest Rate Swap due January 7, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,907)	$ (1,582)
Receive Rate	0.627%	0.323%
Weighted Average Pay Rate	3.355%	3.355%
Interest Rate Swap due March 26, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 10,000	$ 10,000
Fair Value	$ (248)	$ (83)
Receive Rate	0.64%	0.603%
Weighted Average Pay Rate	1.674%	1.674%
Interest Rate Swap due March 18, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 10,000	$ 10,000
Fair Value	$ (244)	$ (83)
Receive Rate	0.656%	0.526%
Weighted Average Pay Rate	1.658%	1.658%
Interest Rate Swap due May 10, 2021
Derivatives, Fair Value [Line Items]
Notional Amount	$ 39,667
Fair Value	$ (594)
Receive Rate	2.945%
Weighted Average Pay Rate	3.674%
Interest Rate Swap due June 15, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,481)	$ (146)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.39%	2.39%
Interest Rate Swap due March 1, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,519)	$ (176)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.352%	2.352%

Derivative Financial Instrume71

Derivative Financial Instruments (Gains (losses) recognized on derivatives (cash flow hedges)) (Details) - Interest Rate Swap - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest Expense
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	$ (1,579)	$ 2,068	$ (4,496)	$ 1,178
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	(465)	(559)	(971)	(1,123)
Other Income
Trading Activity, Gains and Losses, Net [Line Items]
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	$ 0	$ 0	$ 0	$ 0

Derivative Financial Instrume72

Derivative Financial Instruments (Narrative) (Details)	Feb. 05, 2016USD ($)shares	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)
Derivative [Line Items]
Number of shares to be issued upon conversion | shares	73,394
Cash pledged as collateral		$ 7,600,000	$ 5,300,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Cash pledged as collateral		1,700,000	0
Other liabilities
Derivative [Line Items]
Derivative, notional amount	$ 2,000,000
Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Derivative, fixed interest rate				3.40%
Derivative, basis spread on LIBOR (as a percent)				0.88%
Derivative, notional amount				$ 13,800,000
Cash pledged as collateral		6,600,000
Back-to-back Loan Swaps | Interest Rate Swap
Derivative [Line Items]
Cash pledged as collateral		$ 2,300,000	$ 0

Derivative Financial Instrume73

Derivative Financial Instruments (Fair value hedge) (Details) - Other liabilities - USD ($)	Jun. 30, 2016	Feb. 05, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional Amount		$ 2,000,000
Fair Value Hedging
Derivative [Line Items]
Notional Amount	$ 41,200,000		$ 13,805,000
Fair Value	$ (4,681,000)		$ (621,000)

Derivative Financial Instrume74

Derivative Financial Instruments (Gains (losses) on fair value hedges) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Hedging | Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$ (888)	$ 0	$ (2,110)	$ 0

Derivative Financial Instrume75

Derivative Financial Instruments (Balance sheet and income statement category and fair value of embedded derivatives) (Details) - Embedded derivatives - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2016	Dec. 31, 2015
Other noninterest income
Derivative [Line Items]
Gain (Loss) Recognized	$ 144	$ 0	$ 416	$ 0
Other assets
Derivative [Line Items]
Notional Amount	14,786	15,020	14,786	15,020
Fair Value	$ 1,990	$ 1,574	$ 1,990	$ 1,574

Derivative Financial Instrume76

Derivative Financial Instruments (Balance sheet and income statement category and fair values of embedded conversion option) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Feb. 05, 2016
Other liabilities
Derivative [Line Items]
Notional Amount			$ 2,000,000
Embedded conversion option | Other noninterest income
Derivative [Line Items]
Gain (Loss) Recognized	$ (197,000)	$ (297,000)
Embedded conversion option | Other liabilities
Derivative [Line Items]
Notional Amount	2,000,000	2,000,000
Fair Value	$ (619,000)	$ (619,000)

Derivative Financial Instrume77

Derivative Financial Instruments (Loan swaps) (Details) - USD ($)	Jun. 30, 2016	Feb. 05, 2016	Dec. 31, 2015
Other liabilities
Derivative [Line Items]
Notional Amount		$ 2,000,000
Back-to-back Loan Swaps | Other assets
Derivative [Line Items]
Notional Amount	$ 51,505,000		$ 15,782,000
Fair Value, Receive fixed-pay floating interest rate swap	$ 3,699,000		$ 663,000
Weighted Average Receive Rate	4.82%		5.08%
Weighted Average Pay Rate	3.27%		3.07%
Back-to-back Loan Swaps | Other liabilities
Derivative [Line Items]
Notional Amount	$ 51,505,000		$ 15,782,000
Fair Value, Pay fixed-receive floating interest rate swap	$ (3,699,000)		$ (663,000)
Weighted Average Receive Rate	3.27%		3.07%
Weighted Average Pay Rate	4.82%		5.08%

Derivative Financial Instrume78

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (not designated as hedging instruments)) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other assets | Interest rate lock commitments (mortgage)
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	$ 142,118	$ 99,665
Fair Value, Other Assets	6,864	3,168
Other assets | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	55,000	118,378
Fair Value, Other Assets	469	523
Other liabilities | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	247,171	136,709
Fair Value, Other Liabilities	(2,502)	(315)
Other liabilities | Undesignated interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	22,814	50,975
Fair Value, Other Liabilities	$ (2,213)	$ (3,677)

Derivative Financial Instrume79

Derivative Financial Instruments (Derivative instruments gains and losses recognized (not designated as hedging instruments)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Gains on sale of loans held for sale | Interest rate lock commitments (mortgage)
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 1,081	$ (1,712)	$ 5,808	$ 3,832
Gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	(753)	$ 3,700	(2,242)	$ 3,575
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ (54)		$ (370)

Fair Value (Fair value measurem

Fair Value (Fair value measurement recurring) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets
Securities available for sale	$ 1,566,592	$ 1,578,434
U.S. government corporations and agencies
Assets
Securities available for sale	5,101	25,766
Mortgage-backed securities
Assets
Securities available for sale	1,220,732	1,242,702
Obligations of states and political subdivisions
Assets
Securities available for sale	326,422	295,982
Corporate debt securities
Assets
Securities available for sale	830	846
Equity securities
Assets
Securities available for sale	13,507	13,138
Level 1
Assets
Securities available for sale	535	519
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 1 | Interest rate lock commitments
Assets
Derivative assets	0	0
Level 1 | Forward commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 2
Assets
Securities available for sale	1,563,995	1,575,030
Derivative assets	5,689	2,237
Liabilities
Derivative liabilities	19,148	8,401
Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Level 2 | Forward commitments
Assets
Derivative assets	469	523
Liabilities
Derivative liabilities	2,502	315
Level 3
Assets
Securities available for sale	2,062	2,885
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 3 | Interest rate lock commitments
Assets
Derivative assets	6,864	3,168
Level 3 | Forward commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 3 | Corporate debt securities
Assets
Securities available for sale	330	846
Recurring Basis
Assets
Total assets at fair value	1,579,614	1,584,362
Liabilities
Total liabilities at fair value	21,650	8,716
Recurring Basis | Derivative financial instruments
Assets
Derivative assets	5,689	2,237
Liabilities
Derivative liabilities	19,148	8,401
Recurring Basis | Interest rate lock commitments
Assets
Derivative assets	6,864	3,168
Recurring Basis | Forward commitments
Assets
Derivative assets	469	523
Liabilities
Derivative liabilities	2,502	315
Recurring Basis | U.S. government corporations and agencies
Assets
Securities available for sale	5,101	25,766
Recurring Basis | Mortgage-backed securities
Assets
Securities available for sale	1,220,732	1,242,702
Recurring Basis | Obligations of states and political subdivisions
Assets
Securities available for sale	326,422	295,982
Recurring Basis | Corporate debt securities
Assets
Securities available for sale	830	846
Recurring Basis | Equity securities
Assets
Securities available for sale	13,507	13,138
Recurring Basis | Level 1
Assets
Total assets at fair value	535	519
Liabilities
Total liabilities at fair value	0	0
Recurring Basis | Level 1 | Derivative financial instruments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Level 1 | Interest rate lock commitments
Assets
Derivative assets	0	0
Recurring Basis | Level 1 | Forward commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Level 1 | U.S. government corporations and agencies
Assets
Securities available for sale	535	519
Recurring Basis | Level 1 | Mortgage-backed securities
Assets
Securities available for sale	0	0
Recurring Basis | Level 1 | Obligations of states and political subdivisions
Assets
Securities available for sale	0	0
Recurring Basis | Level 1 | Corporate debt securities
Assets
Securities available for sale	0	0
Recurring Basis | Level 1 | Equity securities
Assets
Securities available for sale	0	0
Recurring Basis | Level 2
Assets
Total assets at fair value	1,570,153	1,577,790
Liabilities
Total liabilities at fair value	21,650	8,716
Recurring Basis | Level 2 | Derivative financial instruments
Assets
Derivative assets	5,689	2,237
Liabilities
Derivative liabilities	19,148	8,401
Recurring Basis | Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Recurring Basis | Level 2 | Forward commitments
Assets
Derivative assets	469	523
Liabilities
Derivative liabilities	2,502	315
Recurring Basis | Level 2 | U.S. government corporations and agencies
Assets
Securities available for sale	4,566	25,247
Recurring Basis | Level 2 | Mortgage-backed securities
Assets
Securities available for sale	1,219,000	1,240,663
Recurring Basis | Level 2 | Obligations of states and political subdivisions
Assets
Securities available for sale	326,422	295,982
Recurring Basis | Level 2 | Corporate debt securities
Assets
Securities available for sale	500	0
Recurring Basis | Level 2 | Equity securities
Assets
Securities available for sale	13,507	13,138
Recurring Basis | Level 3
Assets
Total assets at fair value	8,926	6,053
Liabilities
Total liabilities at fair value	0	0
Recurring Basis | Level 3 | Derivative financial instruments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Level 3 | Interest rate lock commitments
Assets
Derivative assets	6,864	3,168
Recurring Basis | Level 3 | Forward commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Level 3 | U.S. government corporations and agencies
Assets
Securities available for sale	0	0
Recurring Basis | Level 3 | Mortgage-backed securities
Assets
Securities available for sale	1,732	2,039
Recurring Basis | Level 3 | Obligations of states and political subdivisions
Assets
Securities available for sale	0	0
Recurring Basis | Level 3 | Corporate debt securities
Assets
Securities available for sale	330	846
Recurring Basis | Level 3 | Equity securities
Assets
Securities available for sale	$ 0	$ 0

Fair Value (Fair value measur81

Fair Value (Fair value measurement non-recurring) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	$ 3,889	$ 3,889
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	11,003	11,524
Commercial servicing rights | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	1,258	0
Premises, furniture and equipment held for sale | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	3,889	3,889
Commercial | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,333	597
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	14,113	1,522
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	105	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	3,508	2,330
Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,845	1,905
Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	20,904	6,354
Other real estate owned	11,003	11,524
Nonrecurring Basis | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,013	272
Other real estate owned	548	5,520
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	20,904	6,354
Other real estate owned	11,003	11,524
Nonrecurring Basis | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	1,258	0
Nonrecurring Basis | Commercial servicing rights | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	46	0
Nonrecurring Basis | Commercial servicing rights | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	0	0
Nonrecurring Basis | Commercial servicing rights | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	0	0
Nonrecurring Basis | Commercial servicing rights | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	1,258	0
Nonrecurring Basis | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	3,889	3,889
Nonrecurring Basis | Premises, furniture and equipment held for sale | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	0	0
Nonrecurring Basis | Premises, furniture and equipment held for sale | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale		0
Nonrecurring Basis | Premises, furniture and equipment held for sale | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	0	0
Nonrecurring Basis | Premises, furniture and equipment held for sale | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	3,889	3,889
Nonrecurring Basis | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,333	597
Nonrecurring Basis | Commercial | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	82
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | Commercial | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,333	597
Nonrecurring Basis | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,113	1,522
Nonrecurring Basis | Commercial real estate | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	998	86
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | 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	14,113	1,522
Nonrecurring Basis | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	105	0
Nonrecurring Basis | Agricultural and agricultural real estate | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | 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	105	0
Nonrecurring Basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,508	2,330
Nonrecurring Basis | Residential real estate | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	104
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | 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	3,508	2,330
Nonrecurring Basis | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,845	1,905
Nonrecurring Basis | Consumer | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	15	0
Nonrecurring Basis | 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
Nonrecurring Basis | 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
Nonrecurring Basis | Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	$ 1,845	$ 1,905

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 fair value measurements) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 1,566,592	$ 1,578,434
Premises, furniture and equipment held for sale	$ 3,889	$ 3,889
Commercial servicing rights | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	11.68%	12.35%
Commercial servicing rights | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	12.68%	13.49%
Corporate debt securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 830	$ 846
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	2,062	2,885
Derivative assets	0	0
Other real estate owned	11,003	11,524
Level 3 | Commercial
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	1,333	597
Level 3 | Commercial real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	14,113	1,522
Level 3 | Agricultural and agricultural real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	105	0
Level 3 | Residential real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	3,508	2,330
Level 3 | Consumer
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	1,845	1,905
Level 3 | Commercial servicing rights
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Commercial servicing rights	1,258	0
Level 3 | Premises, furniture and equipment held for sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Premises, furniture and equipment held for sale	3,889	3,889
Level 3 | Interest rate lock commitments
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Derivative assets	$ 6,864	$ 3,168
Closing ratio	87.00%	86.00%
Level 3 | Z-TRANCHE Securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 1,732	$ 2,039
Level 3 | Z-TRANCHE Securities | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	7.50%	7.50%
Actual defaults (as a percent)	19.85%	22.20%
Actual deferrals (as a percent)	9.57%	10.75%
Level 3 | Z-TRANCHE Securities | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	9.50%	9.50%
Actual defaults (as a percent)	34.02%	33.55%
Actual deferrals (as a percent)	22.12%	21.82%
Level 3 | Z-TRANCHE Securities | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Actual defaults (as a percent)	30.17%	30.60%
Actual deferrals (as a percent)	13.34%	13.36%
Level 3 | Corporate debt securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 330	$ 846

Fair Value (Changes Level 3 ass

Fair Value (Changes Level 3 assets (fair value, recurring)) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Purchases, acquired, sales and settlements:
Gains included in net gains on sale of loans held for sale	$ 16,132	$ 21,328
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	3,168	2,496	$ 2,496
Total gains (losses):
Included in earnings	5,808		288
Purchases, acquired, sales and settlements:
Issuances	142		5,428
Settlements	(2,254)		(5,044)
Balance at period end	6,864		3,168
Gains included in net gains on sale of loans held for sale	6,900		3,200
Z-TRANCHE Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,039	4,947	4,947
Total gains (losses):
Included in earnings	0		(3,038)
Included in other comprehensive income	(307)		982
Purchases, acquired, sales and settlements:
Purchases	0		6
Sales	0		(736)
Settlements	0		(122)
Balance at period end	1,732		2,039
Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	846	$ 0	0
Total gains (losses):
Included in earnings	121		0
Included in other comprehensive income	(91)		106
Purchases, acquired, sales and settlements:
Purchases	0		0
Acquired	0		740
Sales	(546)		0
Settlements	0		0
Balance at period end	$ 330		$ 846

Fair Value (Estimated fair valu

Fair Value (Estimated fair value financial instruments (incl. carrying amounts)) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Securities:
Securities available for sale	$ 1,566,592	$ 1,578,434
Held to maturity	292,854	294,513
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	229,950	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	535	519
Held to maturity	0	0
Other investments	0	0
Loans held for sale	0	0
Loans, net	0	0
Derivative assets	0	0
Financial liabilities:
Short term borrowings	0	0
Other borrowings	0	0
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Demand deposits
Financial liabilities:
Deposits	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Savings deposits
Financial liabilities:
Deposits	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits
Financial liabilities:
Deposits	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate lock commitments
Securities:
Derivative assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Forward commitments
Securities:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial
Securities:
Loans, net	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial real estate
Securities:
Loans, net	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Agricultural and agricultural real estate
Securities:
Loans, net	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential real estate
Securities:
Loans, net	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer
Securities:
Loans, net	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	0
Securities:
Securities available for sale	1,563,995	1,575,030
Held to maturity	292,854	294,513
Other investments	22,445	21,208
Loans held for sale	82,538	74,783
Loans, net	5,407,331	4,939,712
Derivative assets	5,689	2,237
Financial liabilities:
Short term borrowings	303,707	293,898
Other borrowings	297,384	281,271
Derivative liabilities	19,148	8,401
Significant Other Observable Inputs (Level 2) | Demand deposits
Financial liabilities:
Deposits	2,149,911	1,914,141
Significant Other Observable Inputs (Level 2) | Savings deposits
Financial liabilities:
Deposits	3,691,791	3,367,479
Significant Other Observable Inputs (Level 2) | Time deposits
Financial liabilities:
Deposits	995,870	1,124,203
Significant Other Observable Inputs (Level 2) | Interest rate lock commitments
Securities:
Derivative assets	0	0
Significant Other Observable Inputs (Level 2) | Forward commitments
Securities:
Derivative assets	469	523
Financial liabilities:
Derivative liabilities	2,502	315
Significant Other Observable Inputs (Level 2) | Commercial
Securities:
Loans, net	1,264,481	1,256,758
Significant Other Observable Inputs (Level 2) | Commercial real estate
Securities:
Loans, net	2,605,386	2,303,194
Significant Other Observable Inputs (Level 2) | Agricultural and agricultural real estate
Securities:
Loans, net	480,700	469,485
Significant Other Observable Inputs (Level 2) | Residential real estate
Securities:
Loans, net	633,499	529,601
Significant Other Observable Inputs (Level 2) | Consumer
Securities:
Loans, net	423,265	380,674
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	0
Securities:
Securities available for sale	2,062	2,885
Held to maturity	0	0
Other investments	235	235
Loans held for sale	0	0
Loans, net	20,904	6,354
Derivative assets	0	0
Financial liabilities:
Short term borrowings	0	0
Other borrowings	0	0
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Demand deposits
Financial liabilities:
Deposits	0	0
Significant Unobservable Inputs (Level 3) | Savings deposits
Financial liabilities:
Deposits	0	0
Significant Unobservable Inputs (Level 3) | Time deposits
Financial liabilities:
Deposits	0	0
Significant Unobservable Inputs (Level 3) | Interest rate lock commitments
Securities:
Derivative assets	6,864	3,168
Significant Unobservable Inputs (Level 3) | Forward commitments
Securities:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Commercial
Securities:
Loans, net	1,333	597
Significant Unobservable Inputs (Level 3) | Commercial real estate
Securities:
Loans, net	14,113	1,522
Significant Unobservable Inputs (Level 3) | Agricultural and agricultural real estate
Securities:
Loans, net	105	0
Significant Unobservable Inputs (Level 3) | Residential real estate
Securities:
Loans, net	3,508	2,330
Significant Unobservable Inputs (Level 3) | Consumer
Securities:
Loans, net	1,845	1,905
Carrying Amount
Financial assets:
Cash and cash equivalents	229,950	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	1,566,592	1,578,434
Held to maturity	270,423	279,117
Other investments	22,680	21,443
Loans held for sale	82,538	74,783
Loans, net	5,430,502	4,952,801
Derivative assets	5,689	2,237
Financial liabilities:
Short term borrowings	303,707	293,898
Other borrowings	296,895	263,214
Derivative liabilities	19,148	8,401
Carrying Amount | Demand deposits
Financial liabilities:
Deposits	2,149,911	1,914,141
Carrying Amount | Savings deposits
Financial liabilities:
Deposits	3,691,791	3,367,479
Carrying Amount | Time deposits
Financial liabilities:
Deposits	995,870	1,124,203
Carrying Amount | Interest rate lock commitments
Securities:
Derivative assets	6,864	3,168
Carrying Amount | Forward commitments
Securities:
Derivative assets	469	523
Financial liabilities:
Derivative liabilities	2,502	315
Carrying Amount | Commercial
Securities:
Loans, net	1,271,131	1,262,612
Carrying Amount | Commercial real estate
Securities:
Loans, net	2,619,284	2,305,908
Carrying Amount | Agricultural and agricultural real estate
Securities:
Loans, net	477,450	468,533
Carrying Amount | Residential real estate
Securities:
Loans, net	641,006	536,190
Carrying Amount | Consumer
Securities:
Loans, net	421,631	379,558
Estimated Fair Value
Financial assets:
Cash and cash equivalents	229,950	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	1,566,592	1,578,434
Held to maturity	292,854	294,513
Other investments	22,680	21,443
Loans held for sale	82,538	74,783
Loans, net	5,428,235	4,946,066
Derivative assets	5,689	2,237
Financial liabilities:
Short term borrowings	303,707	293,898
Other borrowings	297,384	281,271
Derivative liabilities	19,148	8,401
Estimated Fair Value | Demand deposits
Financial liabilities:
Deposits	2,149,911	1,914,141
Estimated Fair Value | Savings deposits
Financial liabilities:
Deposits	3,691,791	3,367,479
Estimated Fair Value | Time deposits
Financial liabilities:
Deposits	995,870	1,124,203
Estimated Fair Value | Interest rate lock commitments
Securities:
Derivative assets	6,864	3,168
Estimated Fair Value | Forward commitments
Securities:
Derivative assets	469	523
Financial liabilities:
Derivative liabilities	2,502	315
Estimated Fair Value | Commercial
Securities:
Loans, net	1,265,814	1,257,355
Estimated Fair Value | Commercial real estate
Securities:
Loans, net	2,619,499	2,304,716
Estimated Fair Value | Agricultural and agricultural real estate
Securities:
Loans, net	480,805	469,485
Estimated Fair Value | Residential real estate
Securities:
Loans, net	637,007	531,931
Estimated Fair Value | Consumer
Securities:
Loans, net	$ 425,110	$ 382,579

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)segment	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			2
Segment Reporting Information [Line Items]
Net interest income	$ 73,118	$ 57,644	$ 145,825	$ 111,574
Provision for loan losses	2,118	5,674	4,185	7,345
Total noninterest income	31,026	30,661	60,604	61,324
Total noninterest expense	71,020	63,482	141,329	123,096
Income (loss) before taxes	31,006	19,149	60,915	42,457
Average Loans, for the period	5,582,878	4,447,124	5,470,490	4,357,855
Segment Assets, at period end	8,204,401	6,717,007	8,204,401	6,717,007	$ 7,694,754
Operating Segments | Community and Other Banking
Segment Reporting Information [Line Items]
Net interest income	71,895	55,988	143,478	108,877
Provision for loan losses	2,118	5,674	4,185	7,345
Total noninterest income	19,899	15,603	38,436	32,664
Total noninterest expense	59,694	48,987	119,433	96,446
Income (loss) before taxes	29,982	16,930	58,296	37,750
Average Loans, for the period	5,507,542	4,340,289	5,401,867	4,265,624
Segment Assets, at period end	8,082,153	6,579,225	8,082,153	6,579,225
Operating Segments | Retail Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income	1,223	1,656	2,347	2,697
Provision for loan losses	0	0	0	0
Total noninterest income	11,127	15,058	22,168	28,660
Total noninterest expense	11,326	14,495	21,896	26,650
Income (loss) before taxes	1,024	2,219	2,619	4,707
Average Loans, for the period	75,336	106,835	68,623	92,231
Segment Assets, at period end	$ 122,248	$ 137,782	$ 122,248	$ 137,782