Heartland Financial USA (HTLF) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 08, 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	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		26,062,541

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 196,234	$ 237,841
Federal funds sold and other short-term investments	5,855	20,958
Cash and cash equivalents	202,089	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Available for sale, at fair value (cost of $1,652,938 at September 30, 2016, and $1,584,703 at December 31, 2015)	1,655,696	1,578,434
Held to maturity, at cost (fair value of $284,948 at September 30, 2016, and $294,513 at December 31, 2015)	265,302	279,117
Other investments, at cost	22,082	21,443
Loans held for sale	78,317	74,783
Loans receivable:
Held to maturity	5,438,715	5,001,486
Allowance for loan losses	(54,653)	(48,685)
Loans receivable, net	5,384,062	4,952,801
Premises, furniture and equipment, net	162,207	146,259
Premises, furniture and equipment held for sale	3,634	3,889
Other real estate, net	10,740	11,524
Goodwill	127,699	97,852
Core deposit intangibles, net	23,922	22,019
Servicing assets, net	35,906	34,926
Cash surrender value on life insurance	112,060	110,297
Other assets	116,394	100,256
TOTAL ASSETS	8,202,215	7,694,754
Deposits:
Demand	2,238,736	1,914,141
Savings	3,753,300	3,367,479
Time	920,657	1,124,203
Total deposits	6,912,693	6,405,823
Short-term borrowings	214,105	293,898
Other borrowings	294,493	263,214
Accrued expenses and other liabilities	76,536	68,646
TOTAL LIABILITIES	7,497,827	7,031,581
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 30,000,000 shares authorized at both September 30, 2016, and December 31, 2015; issued 24,683,277 shares at September 30, 2016, and 22,435,693 shares at December 31, 2015)	24,683	22,436
Capital surplus	279,316	216,436
Retained earnings	402,179	348,630
Accumulated other comprehensive income (loss)	(3,079)	(6,027)
Treasury stock at cost (1,897 shares at September 30, 2016, and 0 shares at December 31, 2015)	(68)	0
TOTAL STOCKHOLDERS' EQUITY	704,388	663,173
TOTAL LIABILITIES AND EQUITY	8,202,215	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	$ 1,357	$ 0

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Cost of available for sale securities	$ 1,652,938	$ 1,584,703
Fair value of held to maturity securities	$ 284,948	$ 294,513
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (shares)	30,000,000	30,000,000
Common stock, shares issued (shares)	24,683,277	22,435,693
Treasury stock (shares)	1,897	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares outstanding (shares)	0	81,698
Series D Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 0
Preferred stock, shares outstanding (shares)	1,078	0
Preferred stock, shares authorized (shares)	3,000	0
Preferred stock, shares issued (shares)	1,078	0

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
INTEREST INCOME:
Interest and fees on loans	$ 70,046	$ 58,328	$ 208,280	$ 167,201
Interest on securities:
Taxable	7,917	5,858	24,604	19,729
Nontaxable	3,717	3,077	10,793	8,867
Interest on federal funds sold	1	1	12	3
Interest on interest bearing deposits in other financial institutions	6	4	13	11
TOTAL INTEREST INCOME	81,687	67,268	243,702	195,811
INTEREST EXPENSE:
Interest on deposits	4,001	3,767	12,195	11,758
Interest on short-term borrowings	235	228	1,083	638
Interest on other borrowings (includes $492 and $557 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended September 30, 2016 and 2015, respectively, and $1,463 and $1,680 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the nine months ended September 30, 2016 and 2015, respectively)	3,770	3,549	10,918	12,117
TOTAL INTEREST EXPENSE	8,006	7,544	24,196	24,513
NET INTEREST INCOME	73,681	59,724	219,506	171,298
Provision for loan losses	5,328	3,181	9,513	10,526
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	68,353	56,543	209,993	160,772
NONINTEREST INCOME:
Service charges and fees	8,278	6,350	23,462	17,654
Loan servicing income	873	1,368	3,433	3,572
Trust fees	3,689	3,507	11,127	11,051
Brokerage and insurance commissions	1,006	869	2,914	2,872
Securities gains, net (includes $1,586 and $1,807 of net security gains reclassified from accumulated other comprehensive income for the three months ended September 30, 2016 and 2015, respectively, and $9,964 and $9,270 of net security gains reclassified from accumulated other comprehensive income for the nine months ended September 30, 2016 and 2015, respectively)	1,584	1,767	9,732	9,230
Net gains on sale of loans held for sale	11,459	9,823	33,794	38,164
Valuation allowance on commercial servicing rights	5	0	(41)	0
Income on bank owned life insurance	620	372	1,733	1,355
Other noninterest income	1,028	924	2,992	2,406
TOTAL NONINTEREST INCOME	28,542	24,980	89,146	86,304
NONINTEREST EXPENSES:
Salaries and employee benefits	40,733	37,033	124,432	110,522
Occupancy	5,099	4,307	15,322	12,594
Furniture and equipment	2,746	2,121	7,301	6,403
Professional fees	5,985	5,251	20,481	16,544
FDIC insurance assessments	1,180	1,018	3,468	2,873
Advertising	1,339	1,327	4,174	3,841
Intangible assets amortization	1,291	734	4,483	2,080
Other real estate and loan collection expenses	640	496	1,871	1,714
(Gain)/loss on sales/valuations of assets, net	794	721	1,064	2,583
Other noninterest expenses	8,620	8,988	27,160	25,938
TOTAL NONINTEREST EXPENSES	68,427	61,996	209,756	185,092
Income before taxes	28,468	19,527	89,383	61,984
Income taxes (includes $408 and $451 of income tax expense reclassified from accumulated other comprehensive income for the three months ended September 30, 2016 and 2015, respectively, and $3,171 and $2,816 of income tax expense reclassified from accumulated other comprehensive income for the nine months ended September 30, 2016 and 2015, respectively)	8,260	4,945	28,196	16,533
NET INCOME	20,208	14,582	61,187	45,451
Preferred dividends	(53)	(205)	(273)	(613)
Interest expense on convertible preferred debt	17	0	48	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 20,172	$ 14,377	$ 60,962	$ 44,838
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.82	$ 0.70	$ 2.51	$ 2.19
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.81	0.69	2.48	2.16
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.10	$ 0.10	$ 0.30	$ 0.30

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest expense related to derivatives reclassified from accumulated other comprehensive income	$ 3,770	$ 3,549	$ 10,918	$ 12,117
Net security gains reclassified from accumulated other comprehensive income	1,584	1,767	9,732	9,230
Income tax expense reclassified from accumulated other comprehensive income	8,260	4,945	28,196	16,533
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Derivatives
Interest expense related to derivatives reclassified from accumulated other comprehensive income	492	557	1,463	1,680
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Net security gains reclassified from accumulated other comprehensive income	1,586	1,807	9,964	9,270
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income (Loss)
Income tax expense reclassified from accumulated other comprehensive income	$ 408	$ 451	$ 3,171	$ 2,816

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 20,208	$ 14,582	$ 61,187	$ 45,451
Securities:
Net change in unrealized gain (loss) on securities	(5,696)	2,202	18,274	10,916
Reclassification adjustment for net gains realized in net income	(1,586)	(1,807)	(9,964)	(9,270)
Net change in non-credit related other than temporary impairment	0	24	7	72
Income taxes	2,871	(169)	(3,364)	(667)
Other comprehensive income (loss) on securities	(4,411)	250	4,953	1,051
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain (loss) on derivatives	844	(3,071)	(4,623)	(3,016)
Reclassification adjustment for net losses on derivatives realized in net income	492	557	1,463	1,680
Income taxes	(517)	936	1,155	488
Other comprehensive income (loss) on cash flow hedges	819	(1,578)	(2,005)	(848)
Other comprehensive income (loss)	(3,592)	(1,328)	2,948	203
TOTAL COMPREHENSIVE INCOME	$ 16,616	$ 13,254	$ 64,135	$ 45,654

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 61,187	$ 45,451
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,975	16,325
Provision for loan losses	9,513	10,526
Net amortization of premium on securities	24,093	21,339
Securities gains, net	(9,732)	(9,230)
Stock based compensation	3,073	2,635
Write downs and losses on repossessed assets, net	1,094	1,686
Loans originated for sale	(863,354)	(1,087,510)
Proceeds on sales of loans held for sale	883,758	1,083,285
Net gains on sale of loans held for sale	(23,938)	(27,102)
Increase (decrease) in accrued interest receivable	(1,054)	170
Increase in prepaid expenses	(128)	(1,021)
Increase (decrease) in accrued interest payable	332	(177)
Capitalization of servicing rights	(9,856)	(11,766)
Valuation adjustment on commercial servicing rights	41	0
Write downs and losses on sales of assets, net	(30)	897
Other, net	(2,419)	8,137
NET CASH PROVIDED BY OPERATING ACTIVITIES	95,555	53,645
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	768,617	877,077
Proceeds from the sale of securities held to maturity	4,557	0
Proceeds from the sale of other investments	4,722	12,917
Proceeds from the sale of time deposits in other financial institutions	0	2,925
Proceeds from the maturity of and principal paydowns on securities available for sale	130,549	124,084
Proceeds from the maturity of and principal paydowns on securities held to maturity	8,271	1,338
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	250	250
Proceeds from the maturity of and principal paydowns on other investments	0	619
Purchase of securities available for sale	(888,903)	(774,657)
Purchase of other investments	(1,875)	(9,833)
Net (increase) decrease in loans	138,725	(225,356)
Purchase of bank owned life insurance policies	0	(1,100)
Proceeds from bank owned life insurance policies	111	0
Capital expenditures	(8,318)	(4,982)
Net cash and cash equivalents received (paid) in acquisitions	8,084	(6,861)
Proceeds from the sale of equipment	686	1,108
Proceeds on sale of OREO and other repossessed assets	3,266	6,328
NET CASH PROVIDED BY INVESTING ACTIVITIES	168,742	3,857
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits	160,313	191,361
Net increase (decrease) in savings deposits	51,530	(73,050)
Net decrease in time deposit accounts	(353,084)	(26,326)
Net decrease in short-term borrowings	(101,409)	(25,901)
Proceeds from short term FHLB advances	243,100	276,100
Repayments of short term FHLB advances	(257,250)	(270,000)
Proceeds from other borrowings	40,000	29,000
Repayments of other borrowings	(15,562)	(134,803)
Redemption of preferred stock	(81,698)	0
Purchase of treasury stock	(2,293)	(2,856)
Proceeds from issuance of common stock	1,863	2,330
Excess tax benefits on exercised stock options	1,121	671
Dividends paid	(7,638)	(6,794)
NET CASH USED BY FINANCING ACTIVITIES	(321,007)	(40,268)
Net increase (decrease) in cash and cash equivalents	(56,710)	17,234
Cash and cash equivalents at beginning of year	258,799	73,871
CASH AND CASH EQUIVALENTS AT END OF PERIOD	202,089	91,105
Supplemental disclosures:
Cash paid for income/franchise taxes	16,550	7,305
Cash paid for interest	23,864	24,690
Loans transferred to OREO	1,359	5,206
Purchases of securities available for sale, accrued, not paid	0	3,523
Sales of securities available for sale, accrued, not settled	250	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	45,654								45,451			203
Cash dividends declared:
Series C/D Preferred		$ (613)								$ (613)
Common, $0.30 per share	(6,181)								(6,181)
Purchase of shares of common stock	(2,856)												(2,856)
Issuance of shares of common stock	56,053						2,129	51,162					2,762
Stock based compensation	2,635							2,635
Balance at end of period at Sep. 30, 2015	591,009			81,698			20,640	149,613	337,421			1,731	(94)
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	64,135								61,187			2,948
Cash dividends declared:
Series C/D Preferred		$ (168)	$ (105)							$ (168)	$ (105)
Common, $0.30 per share	(7,365)								(7,365)
Redemption of Series C/D preferred stock					$ (81,698)	$ (2,420)
Issuance of Series D preferred stock			$ 3,777			$ 3,777
Purchase of shares of common stock	(2,293)												(2,293)
Issuance of shares of common stock	64,279						2,247	59,807					2,225
Stock based compensation	3,073							3,073
Balance at end of period at Sep. 30, 2016	$ 704,388			$ 1,357			$ 24,683	$ 279,316	$ 402,179			$ (3,079)	$ (68)

Consolidated Statements of Cha9

Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash dividends per share common stock (in dollars per share)	$ 0.30	$ 0.30
Shares of common stock purchased (in shares)	49,785	54,389
Shares of common stock issued (in shares)	2,295,472	2,180,585
Series C Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 2.50	$ 7.50
Series D Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 35

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 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 September 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 nine- month periods ended September 30, 2016 and 2015 , are shown in the table below: Three Months Ended September 30, (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 20,208 $ 14,582 Preferred dividends and discount (53 ) (205 ) Interest expense on convertible preferred debt 17 — Net income available to common stockholders $ 20,172 $ 14,377 Weighted average common shares outstanding for basic earnings per share 24,601 20,620 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 322 273 Weighted average common shares for diluted earnings per share 24,923 20,893 Earnings per common share — basic $ 0.82 $ 0.70 Earnings per common share — diluted $ 0.81 $ 0.69 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — — Nine Months Ended September 30, (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 61,187 $ 45,451 Preferred dividends (273 ) (613 ) Interest expense on convertible preferred debt 48 — Net income available to common stockholders $ 60,962 $ 44,838 Weighted average common shares outstanding for basic earnings per share 24,262 20,483 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 319 269 Weighted average common shares for diluted earnings per share 24,581 20,752 Earnings per common share — basic $ 2.51 $ 2.19 Earnings per common share — diluted $ 2.48 $ 2.16 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 September 30, 2016 , 549,144 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 $ 671,000 during the nine months ended September 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 nine months ended September 30, 2016 , and September 30, 2015 , 24,153 and 22,648 RSUs, respectively, were granted to directors and new employees. A summary of the RSUs outstanding as of September 30, 2016 and 2015 , and changes during the nine months ended September 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 143,721 29.75 139,943 28.90 Vested (117,898 ) 23.44 (151,681 ) 17.98 Forfeited (11,547 ) 27.12 (15,636 ) 25.08 Outstanding at September 30 367,471 $ 27.60 369,181 $ 25.56 Total compensation costs recorded for RSUs were $3.1 million and $2.6 million for the nine -month periods ended September 30, 2016 and 2015 . As of September 30, 2016 , there were $3.7 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 nine 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 September 30, 2016 and 2015 , and changes during the nine months ended September 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 (55,250 ) 24.82 (81,401 ) 23.34 Forfeited (1,500 ) 21.10 (3,250 ) 23.51 Outstanding at September 30 69,200 $ 23.55 131,200 $ 24.15 Options exercisable at September 30 69,200 $ 23.55 131,200 $ 24.15 At September 30, 2016 , the vested options totale d 69,200 shares with a weighted average exercise price of $ 23.55 per share and a weighted average remaining contractual life of 0.86 years. The intrinsic value (the difference between the market price and the aggregate exercise price) for the vested options as of September 30, 2016 , was $866,000 . The intrinsic value for the total of all options exercised during the nine months ended September 30, 2016 , was $486,000 . 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 $ 1.4 million for the nine months ended September 30, 2016 , and $1.9 million for the nine months ended September 30, 2015 . Total compensation costs recorded for options were $0 for both the nine month periods ended September 30, 2016 and 2015 . There are no unrecorded compensation costs related to options at September 30, 2016 . No stock options vested during the nine -month periods ended September 30, 2016 and 2015 . Subsequent Events On October 29, 2016, Heartland entered into a definitive merger agreement providing for the acquisition of Founders Bancorp, parent company of Founders Community Bank, based in San Luis Obispo, California. The transaction is valued at approximately $29.1 million , subject to adjustment. Of the merger consideration, 70% will be in the form of shares of Heartland common stock, and 30% will be in cash. As of September 30, 2016, Founders Community Bank had total assets of $198.5 million , which includes gross loans of $106.6 million and total deposits of $180.5 million . The closing of the acquisition is subject to customary closing conditions, including approvals by the Founders Bancorp shareholders and banking regulators, and is expected to occur in the first quarter of 2017. Simultaneous with the close, Founders Community Bank will be merged into Heartland's Premier Valley Bank subsidiary. Heartland expects the acquisition to be accretive to its earning per share during 2018. On November 2, 2016, Heartland commenced a public offering of 1,379,690 shares of its common stock at $36.24 per share, and the offering closed on November 8, 2016. The offering resulted in net proceeds of approximately $49.7 million after deducting estimated offering expenses payable by Heartland. All of the shares of common stock included in the offering are primary shares. Heartland intends to use the net proceeds from this offering for general corporate purposes, which may include, among other things, working capital, debt repayment or financing potential acquisitions. The interim unaudited consolidated financial statements contained herein cover results for the quarter ended September 30, 2016, and as a result, the effects of these transactions are excluded from the financial results and financial position of Heartland disclosed herein. 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 potential impact of this guidance 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 potential impact of this guidance 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 is currently evaluating the potential impact of this guidance 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 potential impact of this guidance on its results of operations, financial position, and liquidity. In August 2016, the FASB issued ASU 2016-15, " Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments. " The amendments in this update address eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendment is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. An entity that elects early adoption must adopt all of the amendments in the same period. The amendments in this update should be applied using a retrospective transition method to each period presented. Heartland intends to adopt this ASU in 2018, as required, and is currently evaluating the potential impact on its results of operations, financial position, and liquidity.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 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	9 Months Ended
	Sep. 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 September 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 September 30, 2016 U.S. government corporations and agencies $ 4,830 $ 125 $ — $ 4,955 Mortgage-backed securities 1,281,459 14,401 (20,767 ) 1,275,093 Obligations of states and political subdivisions 353,483 9,611 (987 ) 362,107 Corporate debt securities — — — — Total debt securities 1,639,772 24,137 (21,754 ) 1,642,155 Equity securities 13,166 375 — 13,541 Total $ 1,652,938 $ 24,512 $ (21,754 ) $ 1,655,696 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 September 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 September 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 September 30, 2016 Mortgage-backed securities $ — $ — $ — $ — Obligations of states and political subdivisions 265,302 20,191 (545 ) 284,948 Total $ 265,302 $ 20,191 $ (545 ) $ 284,948 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 September 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 September 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 $ 1,075 $ 1,078 Due in 1 to 5 years 22,931 23,277 Due in 5 to 10 years 103,104 105,529 Due after 10 years 231,203 237,178 Total debt securities 358,313 367,062 Mortgage-backed securities 1,281,459 1,275,093 Equity securities 13,166 13,541 Total investment securities $ 1,652,938 $ 1,655,696 The amortized cost and estimated fair value of debt securities held to maturity at September 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 $ 3,695 $ 3,760 Due in 1 to 5 years 14,233 15,163 Due in 5 to 10 years 87,275 92,278 Due after 10 years 160,099 173,747 Total debt securities 265,302 284,948 Mortgage-backed securities — — Total investment securities $ 265,302 $ 284,948 As of September 30, 2016 , and December 31, 2015 , securities with a fair value of $792.7 million and $855.8 million , respectively, were pledged to secure public and trust deposits, short-term borrowings and for other purposes as required and permitted by law. Gross gains and losses realized related to the sales of securities available for sale for the three- and nine -month periods ended September 30, 2016 and 2015 , are summarized as follows, in thousands: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Proceeds from sales $ 146,242 $ 351,050 $ 768,617 $ 877,077 Gross security gains 1,763 2,416 11,416 10,857 Gross security losses 177 609 1,332 1,587 The following tables summarize, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in Heartland's securities portfolio as of September 30, 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 September 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 September 30, 2016 U.S. government corporations and agencies $ — $ — $ — $ — $ — $ — Mortgage-backed securities 575,105 (14,317 ) 180,406 (6,450 ) 755,511 (20,767 ) Obligations of states and political subdivisions 70,894 (986 ) 253 (1 ) 71,147 (987 ) Total debt securities 645,999 (15,303 ) 180,659 (6,451 ) 826,658 (21,754 ) Equity securities — — — — — — Total temporarily impaired securities $ 645,999 $ (15,303 ) $ 180,659 $ (6,451 ) $ 826,658 $ (21,754 ) 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 ) 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 September 30, 2016 Obligations of states and political subdivisions 2,639 (276 ) 1,123 (269 ) 3,762 (545 ) Total temporarily impaired securities $ 2,639 $ (276 ) $ 1,123 $ (269 ) $ 3,762 $ (545 ) 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. In the third quarter of 2016, Heartland sold one obligation of states and political subdivisions from the held to maturity portfolio because the credit quality of the security showed significant deterioration, and it was unlikely Heartland would recover the remaining basis of the security prior to maturity. The significant deterioration of the credit quality of this security was inconsistent with Heartland's original intent upon purchase and classification of this held to maturity security. The carrying value of this security was $503,000 , and the associated gross loss was $1,500 . The remaining 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 September 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 September 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 September 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 Nine 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 ) (72 ) Total changes to AOCI for non-credit related impairment — (24 ) (127 ) (72 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (24 ) $ (127 ) $ (72 ) Included in other securities at September 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 $ 14.9 million and $ 14.3 million , respectively.

Loans

Loans	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans	LOANS Loans as of September 30, 2016 , and December 31, 2015 , were as follows, in thousands: September 30, 2016 December 31, 2015 Loans receivable held to maturity: Commercial $ 1,295,316 $ 1,279,214 Commercial real estate 2,605,296 2,326,360 Agricultural and agricultural real estate 489,387 471,870 Residential real estate 625,965 539,555 Consumer 425,582 386,867 Gross loans receivable held to maturity 5,441,546 5,003,866 Unearned discount (721 ) (488 ) Deferred loan fees (2,110 ) (1,892 ) Total net loans receivable held to maturity 5,438,715 5,001,486 Allowance for loan losses (54,653 ) (48,685 ) Loans receivable, net $ 5,384,062 $ 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 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 is based upon the discounted market value of the collateral. The primary repayment risks of commercial loans 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 September 30, 2016 , Heartland had $1.5 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 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 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 losses. Nonaccrual loans 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 losses at September 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 losses policy during 2016. Allowance For Loan Losses Gross Loans 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 September 30, 2016 Commercial $ 2,077 $ 14,814 $ 16,891 $ 8,002 $ 1,287,314 $ 1,295,316 Commercial real estate 2,661 21,020 23,681 56,894 2,548,402 2,605,296 Agricultural and agricultural real estate 967 4,039 5,006 17,155 472,232 489,387 Residential real estate 473 1,509 1,982 22,448 603,517 625,965 Consumer 1,364 5,729 7,093 5,858 419,724 425,582 Total $ 7,542 $ 47,111 $ 54,653 $ 110,357 $ 5,331,189 $ 5,441,546 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 September 30, 2016 , and December 31, 2015 , in thousands. September 30, 2016 December 31, 2015 Nonaccrual loans $ 57,344 $ 37,874 Nonaccrual troubled debt restructured loans 455 1,781 Total nonaccrual loans $ 57,799 $ 39,655 Accruing loans past due 90 days or more $ 105 $ — Performing troubled debt restructured loans $ 10,281 $ 11,075 The following tables provide information on troubled debt restructured loans that were modified during the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , dollars in thousands: Three Months Ended September 30, 2016 2015 Number Pre- Post- Number Pre- Post- Commercial — $ — $ — — $ — $ — Commercial real estate — — — — — — Total commercial and commercial real estate — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate 5 651 651 1 55 55 Consumer — — — — — — Total 5 $ 651 $ 651 1 $ 55 $ 55 Nine Months Ended September 30, 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 5 651 651 1 55 55 Consumer — — — — — — Total 7 $ 930 $ 930 4 $ 5,188 $ 5,188 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 September 30, 2016 , there were no commitments to extend credit to any of the borrowers with an existing troubled debt restructuring. The following tables present troubled debt restructured loans for which there was a payment default during the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , that had been modified during the twelve-month period prior to default: With Payment Defaults During the Following Periods Three Months Ended September 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial — $ — — $ — Commercial real estate — — 1 814 Total commercial and commercial real estate — — 1 814 Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total — $ — 1 $ 814 With Payment Defaults During the Following Periods Nine Months Ended September 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 95 — $ — Commercial real estate — — 1 814 Total commercial and commercial real estate 1 95 1 814 Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 95 1 $ 814 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 September 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 by credit quality indicator at September 30, 2016 , and December 31, 2015 , in thousands: Pass Nonpass Total September 30, 2016 Commercial $ 1,196,389 $ 98,927 $ 1,295,316 Commercial real estate 2,412,518 192,778 2,605,296 Total commercial and commercial real estate 3,608,907 291,705 3,900,612 Agricultural and agricultural real estate 422,810 66,577 489,387 Residential real estate 596,479 29,486 625,965 Consumer 415,919 9,663 425,582 Total gross loans receivable held to maturity $ 5,044,115 $ 397,431 $ 5,441,546 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 receivable held to maturity $ 4,541,863 $ 462,003 $ 5,003,866 The nonpass category in the table above is comprised of approximately 53% special mention loans and 47% substandard loans as of September 30, 2016 . The percent of nonpass loans on nonaccrual status as of September 30, 2016 , was 15% . 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 0.40% at September 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 at September 30, 2016 , and December 31, 2015 , in thousands: Accruing Loans 30-59 Days Past Due 60-89 Days 90 Days or More Past Due Total Past Due Current Nonaccrual Total Loans September 30, 2016 Commercial $ 2,754 $ 427 $ 91 $ 3,272 $ 1,287,663 $ 4,381 $ 1,295,316 Commercial real estate 8,499 815 — 9,314 2,576,946 19,036 2,605,296 Total commercial and commercial real estate 11,253 1,242 91 12,586 3,864,609 23,417 3,900,612 Agricultural and agricultural real estate 93 1,473 — 1,566 473,708 14,113 489,387 Residential real estate 2,042 142 — 2,184 607,229 16,552 625,965 Consumer 4,888 760 14 5,662 416,203 3,717 425,582 Total gross loans receivable held to maturity $ 18,276 $ 3,617 $ 105 $ 21,998 $ 5,361,749 $ 57,799 $ 5,441,546 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 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 September 30, 2016 , and December 31, 2015 ; the outstanding loan balances recorded on the consolidated balance sheets at September 30, 2016 , and December 31, 2015 ; any related allowance recorded for those loans as of September 30, 2016 , and December 31, 2015 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three- and nine- months ended September 30, 2016 , and year ended December 31, 2015 ; and the interest income recognized on the impaired loans during the three- and nine- month periods ended September 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 September 30, 2016 Impaired loans with a related allowance: Commercial $ 4,664 $ 4,283 $ 2,077 $ 3,121 $ 73 $ 2,566 $ 87 Commercial real estate 15,379 15,346 2,661 15,696 138 9,114 350 Total commercial and commercial real estate 20,043 19,629 4,738 18,817 211 11,680 437 Agricultural and agricultural real estate 3,181 3,181 967 1,112 — 390 — Residential real estate 3,512 3,427 473 3,602 8 3,285 15 Consumer 3,277 3,277 1,364 3,198 10 3,251 25 Total impaired loans with a related allowance $ 30,013 $ 29,514 $ 7,542 $ 26,729 $ 229 $ 18,606 $ 477 Impaired loans without a related allowance: Commercial $ 4,632 $ 3,719 $ — $ 4,413 $ 78 $ 7,105 $ 339 Commercial real estate 44,750 41,548 — 37,243 452 41,645 1,236 Total commercial and commercial real estate 49,382 45,267 — 41,656 530 48,750 1,575 Agricultural and agricultural real estate 13,974 13,974 — 15,310 23 12,232 118 Residential real estate 19,496 19,021 — 18,660 136 17,684 217 Consumer 2,741 2,581 — 2,397 12 2,619 32 Total impaired loans without a related allowance $ 85,593 $ 80,843 $ — $ 78,023 $ 701 $ 81,285 $ 1,942 Total impaired loans held to maturity: Commercial $ 9,296 $ 8,002 $ 2,077 $ 7,534 $ 151 $ 9,671 $ 426 Commercial real estate 60,129 56,894 2,661 52,939 590 50,759 1,586 Total commercial and commercial real estate 69,425 64,896 4,738 60,473 741 60,430 2,012 Agricultural and agricultural real estate 17,155 17,155 967 16,422 23 12,622 118 Residential real estate 23,008 22,448 473 22,262 144 20,969 232 Consumer 6,018 5,858 1,364 5,595 22 5,870 57 Total impaired loans held to maturity $ 115,606 $ 110,357 $ 7,542 $ 104,752 $ 930 $ 99,891 $ 2,419 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 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 losses. Subsequent increases in cash flows result in a reversal of the provision for loan 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 September 30, 2016 , and December 31, 2015 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: September 30, 2016 December 31, 2015 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 2,371 $ 119,811 $ 122,182 $ — $ 159,393 $ 159,393 Commercial real estate 4,119 688,587 692,706 7,716 494,010 501,726 Agricultural and agricultural real estate — 174 174 — 2,985 2,985 Residential real estate 185 175,812 175,997 — 85,549 85,549 Consumer loans — 49,515 49,515 — 33,644 33,644 Total Loans $ 6,675 $ 1,033,899 $ 1,040,574 $ 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , were as follows, in thousands: Balance at June 30, 2016 $ 168 Original yield discount, net, at date of acquisition — Accretion (379 ) Reclassification from nonaccretable difference (1) 331 Balance at September 30, 2016 $ 120 Balance at December 31, 2015 $ 557 Original yield discount, net, at date of acquisitions 19 Accretion (845 ) Reclassification from nonaccretable difference (1) 389 Balance at September 30, 2016 $ 120 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses. Balance at June 30, 2015 $ 398 Original yield discount, net, at date of acquisitions 68 Accretion (202 ) Reclassification from nonaccretable difference (1) 34 Balance at September 30, 2015 $ 298 Balance at December 31, 2014 $ — Original yield discount, net, at date of acquisitions 420 Accretion (318 ) Reclassification from nonaccretable difference (1) 196 Balance at September 30, 2015 $ 298 (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 September 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 September 30, 2016 , there was an allowance for loan losses of $ 549,000 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 Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2016
Loans and Leases Receivable Disclosure [Abstract]
Allowance for Loan Losses	ALLOWANCE FOR LOAN LOSSES Changes in the allowance for loan losses for the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Charge-offs (240 ) (814 ) — (106 ) (2,123 ) (3,283 ) Recoveries 119 467 2 1 263 852 Provision 1,487 1,060 904 22 1,855 5,328 Balance at September 30, 2016 $ 16,891 $ 23,681 $ 5,006 $ 1,982 $ 7,093 $ 54,653 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 (587 ) (2,229 ) — (248 ) (4,775 ) (7,839 ) Recoveries 438 3,056 9 25 766 4,294 Provision 945 3,322 1,110 271 3,865 9,513 Balance at September 30, 2016 $ 16,891 $ 23,681 $ 5,006 $ 1,982 $ 7,093 $ 54,653 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614 Charge-offs (869 ) (376 ) — (13 ) (1,181 ) (2,439 ) Recoveries 87 357 5 71 229 749 Provision 1,628 497 258 (311 ) 1,109 3,181 Balance at September 30, 2015 $ 13,910 $ 18,086 $ 3,939 $ 3,846 $ 7,324 $ 47,105 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 (1,825 ) (1,080 ) (551 ) (126 ) (3,595 ) (7,177 ) Recoveries 518 853 29 178 729 2,307 Provision 3,308 2,415 1,166 53 3,584 10,526 Balance at September 30, 2015 $ 13,910 $ 18,086 $ 3,939 $ 3,846 $ 7,324 $ 47,105 Management allocates the allowance for loan losses by pools of risk within each loan portfolio. The allocation of the allowance for loan losses by loan portfolio is made for analytical purposes and is not necessarily indicative of the trend of future loan losses in any particular category. The total allowance for loan 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	9 Months Ended
	Sep. 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 September 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. There was no goodwill impairment as of the most recent assessment. 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, 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 September 30, 2016 , and December 31, 2015 , are presented in the table below, in thousands: September 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 $ 19,913 $ 23,591 $ 37,118 $ 15,460 $ 21,658 Mortgage servicing rights 49,494 17,652 31,842 45,744 15,430 30,314 Customer relationship intangible 1,177 846 331 1,177 815 362 Commercial servicing rights 6,409 2,345 4,064 5,685 1,074 4,611 Total $ 100,584 $ 40,756 $ 59,828 $ 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 Three months ending December 31, 2016 $ 1,206 $ 2,968 $ 10 $ 232 $ 4,416 Year ending December 31, 2017 4,409 7,219 40 908 12,576 2018 3,900 6,187 39 836 10,962 2019 3,418 5,156 38 657 9,269 2020 2,975 4,125 37 482 7,619 2021 2,457 3,094 35 489 6,075 Thereafter 5,226 3,093 132 460 8,911 Total $ 23,591 $ 31,842 $ 331 $ 4,064 $ 59,828 Projections of amortization expense for mortgage servicing rights are based on existing asset balances and the existing interest rate environment as of September 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 $4.26 billion and $ 4.06 billion as of September 30, 2016 , and December 31, 2015 , respectively. Custodial escrow balances maintained in connection with the mortgage loan servicing portfolio were approximately $28.3 million and $19.2 million as of September 30, 2016 , and December 31, 2015 , respectively. The fair value of Heartland's mortgage servicing rights was estimated at $38.1 million at September 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 13.13% and 10.65% for the September 30, 2016 , and December 31, 2015 , valuations, respectively. The discount rate was 9.26% and 9.25% for the September 30, 2016 , and December 31, 2015 , valuations, respectively. The average capitalization rate for the first nine months of 2016 ranged from 88 to 141 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 $3.1 million and $2.6 million for the quarter ended September 30, 2016 , and September 30, 2015 , respectively and $ 9.0 million and $ 7.8 million for the nine months ended September 30, 2016 , and September 30, 2015 , respectively. The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the nine months ended September 30, 2016 , and September 30, 2015 : 2016 2015 Balance at January 1, $ 30,314 $ 24,984 Originations 9,323 11,062 Amortization (7,795 ) (6,446 ) Balance at September 30, $ 31,842 $ 29,600 Fair value of mortgage servicing rights $ 38,127 $ 40,166 Mortgage servicing rights, net to servicing portfolio 0.75 % 0.75 % 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 $175.6 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 $230,000 and $78,000 for the quarter ended September 30, 2016 , and September 30, 2015 , respectively and $685,000 and $438,000 for the nine months ended September 30, 2016 , and September 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 nine months of 2016 was 6.65% to 7.63% compared to 7.33% to 8.10% as of December 31, 2015 . The discount rate range was 12.07% to 13.59% for the September 30, 2016 , valuations compared to 12.35% to 13.49% for the December 31, 2015 , valuations. The capitalization rate for 2016 ranged from 310 to 445 basis points compared to 180 to 445 basis points for 2015. The total fair value of Heartland's commercial servicing rights was estimated at $4.4 million as of September 30, 2016 . The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the nine months ended September 30, 2016 , and September 30, 2015 : 2016 2015 Balance at January 1, $ 4,611 $ — Purchased commercial servicing rights 190 4,255 Originations 533 704 Amortization (1,229 ) (802 ) Valuation allowance on commercial servicing rights (41 ) — Balance at September 30, $ 4,064 $ 4,157 Fair value of commercial servicing rights $ 4,397 $ 4,412 Commercial servicing rights, net to servicing portfolio 2.38 % 2.33 % 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 September 30, 2016 , no valuation allowance was required on commercial servicing rights less than 20 years and a $41,000 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 September 30, 2016 , and December 31, 2015 : September 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 $ 25 $ 27 $ — $ 118 $ 121 $ — Premier Valley Bank 171 188 — 373 332 41 Wisconsin Bank & Trust 916 1,031 — 2,502 2,698 — Total $ 1,112 $ 1,246 $ — $ 2,993 $ 3,151 $ 41 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	9 Months Ended
	Sep. 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 September 30, 2016 , and December 31, 2015 , respectively. Heartland's counterparties were required to pledge $0 at September 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 nine months ended September 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 $1.5 million . For the next twelve months, Heartland estimates that cash payments and reclassification from accumulated other comprehensive income to interest expense will total $ 2.0 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 September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity September 30, 2016 Interest rate swap $ — $ — Other liabilities — % — % 04/20/2016 Interest rate swap 25,000 (1,263 ) Other liabilities 0.857 % 2.255 % 03/17/2021 Interest rate swap 20,000 (236 ) Other liabilities 0.842 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,626 ) Other liabilities 0.657 % 3.355 % 01/07/2020 Interest rate swap 10,000 (163 ) Other liabilities 0.857 % 1.674 % 03/26/2019 Interest rate swap 10,000 (160 ) Other liabilities 0.857 % 1.658 % 03/18/2019 Interest rate swap 38,667 (352 ) Other liabilities 3.018 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (1,391 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (1,409 ) 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 nine- month periods ended September 30, 2016 , and September 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 September 30, 2016 Interest rate swaps $ 1,336 Interest expense $ (492 ) Other income $ — Nine Months Ended September 30, 2016 Interest rate swaps $ (3,160 ) Interest expense $ (1,463 ) Other income $ — Three Months Ended September 30, 2015 Interest rate swaps $ (2,514 ) Interest expense $ (557 ) Other income $ — Nine Months Ended September 30, 2015 Interest rate swaps $ (1,336 ) Interest expense $ (1,680 ) 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 $6.7 million of cash and securities as collateral as of September 30, 2016 . The table below identifies the notional amount, fair value and balance sheet category of Heartland's fair value hedges at September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category September 30, 2016 Fair value hedges $ 41,007 $ (4,467 ) 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended September 30, 2016 Fair value hedges $ (225 ) Interest income Nine Months Ended September 30, 2016 Fair value hedges $ (2,335 ) Interest income Three Months Ended September 30, 2015 Fair value hedges $ — Interest income Nine Months Ended September 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 September 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 September 30, 2016 Embedded derivatives $ 14,668 $ 1,817 Other assets Other noninterest income $ (173 ) $ 243 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 common 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 . During the third quarter of 2016, $1.4 million of the debt was converted to 52,917 shares of common equity. As of September 30, 2016, the remaining shares to be issued upon conversion total 20,477 . 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 embedded conversion option as of September 30, 2016 : Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter- to-Date Gain (Loss) Recognized Year- to-Date September 30, 2016 Embedded conversion option $ 558 $ (184 ) Other liabilities Other noninterest income $ 435 $ 138 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 $ 3.6 million and $ 0 as of September 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 nine months ended September 30, 2016 and September 30, 2015 , 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 September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate September 30, 2016 Receive fixed-pay floating interest rate swap $ 52,930 $ 3,411 Other assets 4.82 % 3.34 % Pay fixed-receive floating interest rate swap 52,930 (3,411 ) Other liabilities 3.34 % 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 $768,000 and $0 at September 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 September 30, 2016 , and December 31, 2015 , in thousands: Balance Sheet Category Notional Amount Fair Value September 30, 2016 Interest rate lock commitments (mortgage) Other assets $ 139,704 $ 6,239 Forward commitments Other assets 112,500 209 Forward commitments Other liabilities 285,248 (1,312 ) Undesignated interest rate swaps Other liabilities 22,620 (1,944 ) 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended September 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (1,344 ) Forward commitments Gains on sale of loans held for sale 931 Undesignated interest rate swaps Other noninterest income 269 Nine Months Ended September 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 4,464 Forward commitments Gains on sale of loans held for sale (1,311 ) Undesignated interest rate swaps Other noninterest income (101 ) Three Months Ended September 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (361 ) Forward commitments Gains on sale of loans held for sale (4,237 ) Nine Months Ended September 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 3,471 Forward commitments Gains on sale of loans held for sale (662 )

Fair Value

Fair Value	9 Months Ended
	Sep. 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 September 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 September 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 September 30, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 4,955 $ 530 $ 4,425 $ — Mortgage-backed securities 1,275,093 — 1,273,196 1,897 Obligations of states and political subdivisions 362,107 — 362,107 — Corporate debt securities — — — — Equity securities 13,541 — 13,541 — Derivative financial instruments (1) 5,228 — 5,228 — Interest rate lock commitments 6,239 — — 6,239 Forward commitments 209 — 209 — Total assets at fair value $ 1,667,372 $ 530 $ 1,658,706 $ 8,136 Liabilities Derivative financial instruments (2) $ 16,606 $ — $ 16,606 $ — Forward commitments 1,312 — 1,312 — Total liabilities at fair value $ 17,918 $ — $ 17,918 $ — 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 September 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 $ 2,366 $ — $ — $ 2,366 $ 190 Commercial real estate 14,707 — — 14,707 3,895 Agricultural and agricultural real estate 2,213 — — 2,213 — Residential real estate 3,200 — — 3,200 — Consumer 1,913 — — 1,913 — Total collateral dependent impaired loans $ 24,399 $ — $ — $ 24,399 $ 4,085 Other real estate owned $ 10,740 $ — $ — $ 10,740 $ 1,094 Premises, furniture and equipment held for sale $ 3,634 $ — $ 3,634 $ 255 Commercial servicing rights $ 332 $ — $ — $ 332 $ 41 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 9/30/16 Valuation Unobservable Range Z-TRANCHE Securities $ 1,897 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 17.09 - 35.91% (30.93%) Actual deferrals 8.22 - 22.82% (13.62%) Corporate debt securities — Discounted cash flows Bank analysis (1) Interest rate lock commitments 6,239 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,634 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial servicing rights 332 Discounted cash flows Third party valuation (4) Other real estate owned 10,740 Modified appraised value Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 2,366 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 14,707 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate 2,213 Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 3,200 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,913 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 September 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 Nine Months Ended September 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 (142 ) 982 Purchases, sales and settlements: Purchases — 6 Sales — (736 ) Settlements — (122 ) Balance at period end $ 1,897 $ 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 Nine Months Ended September 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 846 $ — Total gains (losses): Included in earnings 56 — Included in other comprehensive income (106 ) 106 Purchases, acquired, sales and settlements: Purchases — — Acquired — 740 Sales (796 ) — Settlements — — Balance at period end $ — $ 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 Nine Months Ended September 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 3,168 $ 2,496 Total gains (losses) included in earnings 4,464 288 Issuances 1,540 5,428 Settlements (2,933 ) (5,044 ) Balance at period end $ 6,239 $ 3,168 Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments held at September 30, 2016 , and December 31, 2015 , were $6.2 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 September 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 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 $ 202,089 $ 202,089 $ 202,089 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,655,696 1,655,696 530 1,653,269 1,897 Held to maturity 265,302 284,948 — 284,948 — Other investments 22,082 22,082 — 21,847 235 Loans held for sale 78,317 78,317 — 78,317 — Loans, net: Commercial 1,277,691 1,271,961 — 1,269,595 2,366 Commercial real estate 2,580,136 2,584,885 — 2,570,178 14,707 Agricultural and agricultural real estate 485,071 487,861 — 485,648 2,213 Residential real estate 622,684 618,770 — 615,570 3,200 Consumer 418,480 422,770 — 420,857 1,913 Total Loans, net 5,384,062 5,386,247 — 5,361,848 24,399 Derivative financial instruments (1) 5,228 5,228 — 5,228 — Interest rate lock commitments 6,239 6,239 — — 6,239 Forward commitments 209 209 — 209 — Financial liabilities: Deposits Demand deposits 2,238,736 2,238,736 — 2,238,736 — Savings deposits 3,753,300 3,753,300 — 3,753,300 — Time deposits 920,657 920,657 — 920,657 — Short term borrowings 214,105 214,105 — 214,105 — Other borrowings 294,493 297,018 — 297,018 — Derivative financial instruments (2) 16,606 16,606 — 16,606 — Forward commitments 1,312 1,312 — 1,312 — (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 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, embedded conversion options 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 — 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	9 Months Ended
	Sep. 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands. Three Months Ended September 30, 2016 2015 Community and Other Banking Retail Mortgage Banking Total Community and Other Banking Retail Mortgage Banking Total Net interest income $ 72,694 $ 987 $ 73,681 $ 58,123 $ 1,601 $ 59,724 Provision for loan losses 5,328 — 5,328 3,181 — 3,181 Total noninterest income 17,337 11,205 28,542 16,015 8,965 24,980 Total noninterest expense 57,988 10,439 68,427 49,168 12,828 61,996 Income (loss) before taxes $ 26,715 $ 1,753 $ 28,468 $ 21,789 $ (2,262 ) $ 19,527 Average Loans, for the period $ 5,464,304 $ 73,784 $ 5,538,088 $ 4,563,221 $ 90,958 $ 4,654,179 Segment Assets, at period end $ 8,084,810 $ 117,405 $ 8,202,215 $ 6,676,526 $ 129,358 $ 6,805,884 Nine Months Ended September 30, 2016 2015 Community Retail Total Community Retail Total Net interest income $ 216,172 $ 3,334 $ 219,506 $ 167,000 $ 4,298 $ 171,298 Provision for loan losses 9,513 — 9,513 10,526 — 10,526 Total noninterest income 55,773 33,373 89,146 48,679 37,625 86,304 Total noninterest expense 177,421 32,335 209,756 145,614 39,478 185,092 Income before taxes $ 85,011 $ 4,372 $ 89,383 $ 59,539 $ 2,445 $ 61,984 Average Loans, for the period $ 5,422,843 $ 70,344 $ 5,493,187 $ 4,365,908 $ 91,807 $ 4,457,715 Segment Assets, at period end $ 8,084,810 $ 117,405 $ 8,202,215 $ 6,676,526 $ 129,358 $ 6,805,884

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 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 September 30, 2016 , are not necessarily indicative of the results expected for the year ending December 31, 2016 .
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 September 30, 2016 , 549,144 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 potential impact of this guidance 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 potential impact of this guidance 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 is currently evaluating the potential impact of this guidance 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 potential impact of this guidance on its results of operations, financial position, and liquidity. In August 2016, the FASB issued ASU 2016-15, " Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments. " The amendments in this update address eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendment is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. An entity that elects early adoption must adopt all of the amendments in the same period. The amendments in this update should be applied using a retrospective transition method to each period presented. Heartland intends to adopt this ASU in 2018, as required, and is currently evaluating the potential impact on its results of operations, financial position, and liquidity.
Fair Value Hierarchy	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 September 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.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 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 nine- month periods ended September 30, 2016 and 2015 , are shown in the table below: Three Months Ended September 30, (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 20,208 $ 14,582 Preferred dividends and discount (53 ) (205 ) Interest expense on convertible preferred debt 17 — Net income available to common stockholders $ 20,172 $ 14,377 Weighted average common shares outstanding for basic earnings per share 24,601 20,620 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 322 273 Weighted average common shares for diluted earnings per share 24,923 20,893 Earnings per common share — basic $ 0.82 $ 0.70 Earnings per common share — diluted $ 0.81 $ 0.69 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — — Nine Months Ended September 30, (Dollars and number of shares in thousands, except per share data) 2016 2015 Net income attributable to Heartland $ 61,187 $ 45,451 Preferred dividends (273 ) (613 ) Interest expense on convertible preferred debt 48 — Net income available to common stockholders $ 60,962 $ 44,838 Weighted average common shares outstanding for basic earnings per share 24,262 20,483 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 319 269 Weighted average common shares for diluted earnings per share 24,581 20,752 Earnings per common share — basic $ 2.51 $ 2.19 Earnings per common share — diluted $ 2.48 $ 2.16 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 September 30, 2016 and 2015 , and changes during the nine months ended September 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 143,721 29.75 139,943 28.90 Vested (117,898 ) 23.44 (151,681 ) 17.98 Forfeited (11,547 ) 27.12 (15,636 ) 25.08 Outstanding at September 30 367,471 $ 27.60 369,181 $ 25.56
Summary of Status of Stock Options	A summary of the stock options outstanding as of September 30, 2016 and 2015 , and changes during the nine months ended September 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 (55,250 ) 24.82 (81,401 ) 23.34 Forfeited (1,500 ) 21.10 (3,250 ) 23.51 Outstanding at September 30 69,200 $ 23.55 131,200 $ 24.15 Options exercisable at September 30 69,200 $ 23.55 131,200 $ 24.15

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 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)	9 Months Ended
	Sep. 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 September 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 September 30, 2016 U.S. government corporations and agencies $ 4,830 $ 125 $ — $ 4,955 Mortgage-backed securities 1,281,459 14,401 (20,767 ) 1,275,093 Obligations of states and political subdivisions 353,483 9,611 (987 ) 362,107 Corporate debt securities — — — — Total debt securities 1,639,772 24,137 (21,754 ) 1,642,155 Equity securities 13,166 375 — 13,541 Total $ 1,652,938 $ 24,512 $ (21,754 ) $ 1,655,696 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 September 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 September 30, 2016 Mortgage-backed securities $ — $ — $ — $ — Obligations of states and political subdivisions 265,302 20,191 (545 ) 284,948 Total $ 265,302 $ 20,191 $ (545 ) $ 284,948 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 September 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 $ 1,075 $ 1,078 Due in 1 to 5 years 22,931 23,277 Due in 5 to 10 years 103,104 105,529 Due after 10 years 231,203 237,178 Total debt securities 358,313 367,062 Mortgage-backed securities 1,281,459 1,275,093 Equity securities 13,166 13,541 Total investment securities $ 1,652,938 $ 1,655,696 The amortized cost and estimated fair value of debt securities held to maturity at September 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 $ 3,695 $ 3,760 Due in 1 to 5 years 14,233 15,163 Due in 5 to 10 years 87,275 92,278 Due after 10 years 160,099 173,747 Total debt securities 265,302 284,948 Mortgage-backed securities — — Total investment securities $ 265,302 $ 284,948
Schedule of Realized Gross Gains (Losses)	Gross gains and losses realized related to the sales of securities available for sale for the three- and nine -month periods ended September 30, 2016 and 2015 , are summarized as follows, in thousands: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Proceeds from sales $ 146,242 $ 351,050 $ 768,617 $ 877,077 Gross security gains 1,763 2,416 11,416 10,857 Gross security losses 177 609 1,332 1,587
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	The following tables summarize, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in Heartland's securities portfolio as of September 30, 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 September 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 September 30, 2016 U.S. government corporations and agencies $ — $ — $ — $ — $ — $ — Mortgage-backed securities 575,105 (14,317 ) 180,406 (6,450 ) 755,511 (20,767 ) Obligations of states and political subdivisions 70,894 (986 ) 253 (1 ) 71,147 (987 ) Total debt securities 645,999 (15,303 ) 180,659 (6,451 ) 826,658 (21,754 ) Equity securities — — — — — — Total temporarily impaired securities $ 645,999 $ (15,303 ) $ 180,659 $ (6,451 ) $ 826,658 $ (21,754 ) 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 ) 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 September 30, 2016 Obligations of states and political subdivisions 2,639 (276 ) 1,123 (269 ) 3,762 (545 ) Total temporarily impaired securities $ 2,639 $ (276 ) $ 1,123 $ (269 ) $ 3,762 $ (545 ) 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 Nine 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 ) (72 ) Total changes to AOCI for non-credit related impairment — (24 ) (127 ) (72 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (24 ) $ (127 ) $ (72 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Schedule of Loans and Leases	Loans as of September 30, 2016 , and December 31, 2015 , were as follows, in thousands: September 30, 2016 December 31, 2015 Loans receivable held to maturity: Commercial $ 1,295,316 $ 1,279,214 Commercial real estate 2,605,296 2,326,360 Agricultural and agricultural real estate 489,387 471,870 Residential real estate 625,965 539,555 Consumer 425,582 386,867 Gross loans receivable held to maturity 5,441,546 5,003,866 Unearned discount (721 ) (488 ) Deferred loan fees (2,110 ) (1,892 ) Total net loans receivable held to maturity 5,438,715 5,001,486 Allowance for loan losses (54,653 ) (48,685 ) Loans receivable, net $ 5,384,062 $ 4,952,801
Allowance for Loan and Lease Losses, Based on Impairment Methodology	The following table shows the balance in the allowance for loan losses at September 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 losses policy during 2016. Allowance For Loan Losses Gross Loans 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 September 30, 2016 Commercial $ 2,077 $ 14,814 $ 16,891 $ 8,002 $ 1,287,314 $ 1,295,316 Commercial real estate 2,661 21,020 23,681 56,894 2,548,402 2,605,296 Agricultural and agricultural real estate 967 4,039 5,006 17,155 472,232 489,387 Residential real estate 473 1,509 1,982 22,448 603,517 625,965 Consumer 1,364 5,729 7,093 5,858 419,724 425,582 Total $ 7,542 $ 47,111 $ 54,653 $ 110,357 $ 5,331,189 $ 5,441,546 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 September 30, 2016 , and December 31, 2015 , in thousands. September 30, 2016 December 31, 2015 Nonaccrual loans $ 57,344 $ 37,874 Nonaccrual troubled debt restructured loans 455 1,781 Total nonaccrual loans $ 57,799 $ 39,655 Accruing loans past due 90 days or more $ 105 $ — Performing troubled debt restructured loans $ 10,281 $ 11,075
Troubled Debt Restructuring on Loans Modified	The following tables provide information on troubled debt restructured loans that were modified during the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , dollars in thousands: Three Months Ended September 30, 2016 2015 Number Pre- Post- Number Pre- Post- Commercial — $ — $ — — $ — $ — Commercial real estate — — — — — — Total commercial and commercial real estate — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate 5 651 651 1 55 55 Consumer — — — — — — Total 5 $ 651 $ 651 1 $ 55 $ 55 Nine Months Ended September 30, 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 5 651 651 1 55 55 Consumer — — — — — — Total 7 $ 930 $ 930 4 $ 5,188 $ 5,188
Troubled Debt Restructured Loans with Payment Default	The following tables present troubled debt restructured loans for which there was a payment default during the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , that had been modified during the twelve-month period prior to default: With Payment Defaults During the Following Periods Three Months Ended September 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial — $ — — $ — Commercial real estate — — 1 814 Total commercial and commercial real estate — — 1 814 Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total — $ — 1 $ 814 With Payment Defaults During the Following Periods Nine Months Ended September 30, 2016 2015 Number of Loans Recorded Investment Number of Loans Recorded Investment Commercial 1 $ 95 — $ — Commercial real estate — — 1 814 Total commercial and commercial real estate 1 95 1 814 Agricultural and agricultural real estate — — — — Residential real estate — — — — Consumer — — — — Total 1 $ 95 1 $ 814
Financing Receivable Credit Quality Indicators	The following table presents loans by credit quality indicator at September 30, 2016 , and December 31, 2015 , in thousands: Pass Nonpass Total September 30, 2016 Commercial $ 1,196,389 $ 98,927 $ 1,295,316 Commercial real estate 2,412,518 192,778 2,605,296 Total commercial and commercial real estate 3,608,907 291,705 3,900,612 Agricultural and agricultural real estate 422,810 66,577 489,387 Residential real estate 596,479 29,486 625,965 Consumer 415,919 9,663 425,582 Total gross loans receivable held to maturity $ 5,044,115 $ 397,431 $ 5,441,546 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 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 at September 30, 2016 , and December 31, 2015 , in thousands: Accruing Loans 30-59 Days Past Due 60-89 Days 90 Days or More Past Due Total Past Due Current Nonaccrual Total Loans September 30, 2016 Commercial $ 2,754 $ 427 $ 91 $ 3,272 $ 1,287,663 $ 4,381 $ 1,295,316 Commercial real estate 8,499 815 — 9,314 2,576,946 19,036 2,605,296 Total commercial and commercial real estate 11,253 1,242 91 12,586 3,864,609 23,417 3,900,612 Agricultural and agricultural real estate 93 1,473 — 1,566 473,708 14,113 489,387 Residential real estate 2,042 142 — 2,184 607,229 16,552 625,965 Consumer 4,888 760 14 5,662 416,203 3,717 425,582 Total gross loans receivable held to maturity $ 18,276 $ 3,617 $ 105 $ 21,998 $ 5,361,749 $ 57,799 $ 5,441,546 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 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 September 30, 2016 , and December 31, 2015 ; the outstanding loan balances recorded on the consolidated balance sheets at September 30, 2016 , and December 31, 2015 ; any related allowance recorded for those loans as of September 30, 2016 , and December 31, 2015 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three- and nine- months ended September 30, 2016 , and year ended December 31, 2015 ; and the interest income recognized on the impaired loans during the three- and nine- month periods ended September 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 September 30, 2016 Impaired loans with a related allowance: Commercial $ 4,664 $ 4,283 $ 2,077 $ 3,121 $ 73 $ 2,566 $ 87 Commercial real estate 15,379 15,346 2,661 15,696 138 9,114 350 Total commercial and commercial real estate 20,043 19,629 4,738 18,817 211 11,680 437 Agricultural and agricultural real estate 3,181 3,181 967 1,112 — 390 — Residential real estate 3,512 3,427 473 3,602 8 3,285 15 Consumer 3,277 3,277 1,364 3,198 10 3,251 25 Total impaired loans with a related allowance $ 30,013 $ 29,514 $ 7,542 $ 26,729 $ 229 $ 18,606 $ 477 Impaired loans without a related allowance: Commercial $ 4,632 $ 3,719 $ — $ 4,413 $ 78 $ 7,105 $ 339 Commercial real estate 44,750 41,548 — 37,243 452 41,645 1,236 Total commercial and commercial real estate 49,382 45,267 — 41,656 530 48,750 1,575 Agricultural and agricultural real estate 13,974 13,974 — 15,310 23 12,232 118 Residential real estate 19,496 19,021 — 18,660 136 17,684 217 Consumer 2,741 2,581 — 2,397 12 2,619 32 Total impaired loans without a related allowance $ 85,593 $ 80,843 $ — $ 78,023 $ 701 $ 81,285 $ 1,942 Total impaired loans held to maturity: Commercial $ 9,296 $ 8,002 $ 2,077 $ 7,534 $ 151 $ 9,671 $ 426 Commercial real estate 60,129 56,894 2,661 52,939 590 50,759 1,586 Total commercial and commercial real estate 69,425 64,896 4,738 60,473 741 60,430 2,012 Agricultural and agricultural real estate 17,155 17,155 967 16,422 23 12,622 118 Residential real estate 23,008 22,448 473 22,262 144 20,969 232 Consumer 6,018 5,858 1,364 5,595 22 5,870 57 Total impaired loans held to maturity $ 115,606 $ 110,357 $ 7,542 $ 104,752 $ 930 $ 99,891 $ 2,419 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 September 30, 2016 , and December 31, 2015 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: September 30, 2016 December 31, 2015 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 2,371 $ 119,811 $ 122,182 $ — $ 159,393 $ 159,393 Commercial real estate 4,119 688,587 692,706 7,716 494,010 501,726 Agricultural and agricultural real estate — 174 174 — 2,985 2,985 Residential real estate 185 175,812 175,997 — 85,549 85,549 Consumer loans — 49,515 49,515 — 33,644 33,644 Total Loans $ 6,675 $ 1,033,899 $ 1,040,574 $ 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , were as follows, in thousands: Balance at June 30, 2016 $ 168 Original yield discount, net, at date of acquisition — Accretion (379 ) Reclassification from nonaccretable difference (1) 331 Balance at September 30, 2016 $ 120 Balance at December 31, 2015 $ 557 Original yield discount, net, at date of acquisitions 19 Accretion (845 ) Reclassification from nonaccretable difference (1) 389 Balance at September 30, 2016 $ 120 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses. Balance at June 30, 2015 $ 398 Original yield discount, net, at date of acquisitions 68 Accretion (202 ) Reclassification from nonaccretable difference (1) 34 Balance at September 30, 2015 $ 298 Balance at December 31, 2014 $ — Original yield discount, net, at date of acquisitions 420 Accretion (318 ) Reclassification from nonaccretable difference (1) 196 Balance at September 30, 2015 $ 298 (1) Represents increases in estimated cash flows expected to be received, primarily due to lower estimated credit losses.

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2016
Loans and Leases Receivable Disclosure [Abstract]
Changes in the Allowance for Loan and Leases Losses	Changes in the allowance for loan losses for the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at June 30, 2016 $ 15,525 $ 22,968 $ 4,100 $ 2,065 $ 7,098 $ 51,756 Charge-offs (240 ) (814 ) — (106 ) (2,123 ) (3,283 ) Recoveries 119 467 2 1 263 852 Provision 1,487 1,060 904 22 1,855 5,328 Balance at September 30, 2016 $ 16,891 $ 23,681 $ 5,006 $ 1,982 $ 7,093 $ 54,653 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 (587 ) (2,229 ) — (248 ) (4,775 ) (7,839 ) Recoveries 438 3,056 9 25 766 4,294 Provision 945 3,322 1,110 271 3,865 9,513 Balance at September 30, 2016 $ 16,891 $ 23,681 $ 5,006 $ 1,982 $ 7,093 $ 54,653 Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at June 30, 2015 $ 13,064 $ 17,608 $ 3,676 $ 4,099 $ 7,167 $ 45,614 Charge-offs (869 ) (376 ) — (13 ) (1,181 ) (2,439 ) Recoveries 87 357 5 71 229 749 Provision 1,628 497 258 (311 ) 1,109 3,181 Balance at September 30, 2015 $ 13,910 $ 18,086 $ 3,939 $ 3,846 $ 7,324 $ 47,105 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 (1,825 ) (1,080 ) (551 ) (126 ) (3,595 ) (7,177 ) Recoveries 518 853 29 178 729 2,307 Provision 3,308 2,415 1,166 53 3,584 10,526 Balance at September 30, 2015 $ 13,910 $ 18,086 $ 3,939 $ 3,846 $ 7,324 $ 47,105

Goodwill, Core Deposit Premiu25

Goodwill, Core Deposit Premium and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 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 September 30, 2016 , and December 31, 2015 , are presented in the table below, in thousands: September 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 $ 19,913 $ 23,591 $ 37,118 $ 15,460 $ 21,658 Mortgage servicing rights 49,494 17,652 31,842 45,744 15,430 30,314 Customer relationship intangible 1,177 846 331 1,177 815 362 Commercial servicing rights 6,409 2,345 4,064 5,685 1,074 4,611 Total $ 100,584 $ 40,756 $ 59,828 $ 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 Three months ending December 31, 2016 $ 1,206 $ 2,968 $ 10 $ 232 $ 4,416 Year ending December 31, 2017 4,409 7,219 40 908 12,576 2018 3,900 6,187 39 836 10,962 2019 3,418 5,156 38 657 9,269 2020 2,975 4,125 37 482 7,619 2021 2,457 3,094 35 489 6,075 Thereafter 5,226 3,093 132 460 8,911 Total $ 23,591 $ 31,842 $ 331 $ 4,064 $ 59,828
Summary of Changes in Servicing Rights	The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the nine months ended September 30, 2016 , and September 30, 2015 : 2016 2015 Balance at January 1, $ 30,314 $ 24,984 Originations 9,323 11,062 Amortization (7,795 ) (6,446 ) Balance at September 30, $ 31,842 $ 29,600 Fair value of mortgage servicing rights $ 38,127 $ 40,166 Mortgage servicing rights, net to servicing portfolio 0.75 % 0.75 % The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the nine months ended September 30, 2016 , and September 30, 2015 : 2016 2015 Balance at January 1, $ 4,611 $ — Purchased commercial servicing rights 190 4,255 Originations 533 704 Amortization (1,229 ) (802 ) Valuation allowance on commercial servicing rights (41 ) — Balance at September 30, $ 4,064 $ 4,157 Fair value of commercial servicing rights $ 4,397 $ 4,412 Commercial servicing rights, net to servicing portfolio 2.38 % 2.33 %
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 September 30, 2016 , and December 31, 2015 : September 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 $ 25 $ 27 $ — $ 118 $ 121 $ — Premier Valley Bank 171 188 — 373 332 41 Wisconsin Bank & Trust 916 1,031 — 2,502 2,698 — Total $ 1,112 $ 1,246 $ — $ 2,993 $ 3,151 $ 41 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)	9 Months Ended
	Sep. 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 loan swaps at September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate September 30, 2016 Receive fixed-pay floating interest rate swap $ 52,930 $ 3,411 Other assets 4.82 % 3.34 % Pay fixed-receive floating interest rate swap 52,930 (3,411 ) Other liabilities 3.34 % 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 balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity September 30, 2016 Interest rate swap $ — $ — Other liabilities — % — % 04/20/2016 Interest rate swap 25,000 (1,263 ) Other liabilities 0.857 % 2.255 % 03/17/2021 Interest rate swap 20,000 (236 ) Other liabilities 0.842 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,626 ) Other liabilities 0.657 % 3.355 % 01/07/2020 Interest rate swap 10,000 (163 ) Other liabilities 0.857 % 1.674 % 03/26/2019 Interest rate swap 10,000 (160 ) Other liabilities 0.857 % 1.658 % 03/18/2019 Interest rate swap 38,667 (352 ) Other liabilities 3.018 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (1,391 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (1,409 ) 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 notional amount, fair value and balance sheet category of Heartland's fair value hedges at September 30, 2016 , and December 31, 2015 , in thousands: Notional Amount Fair Value Balance Sheet Category September 30, 2016 Fair value hedges $ 41,007 $ (4,467 ) 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended September 30, 2016 Fair value hedges $ (225 ) Interest income Nine Months Ended September 30, 2016 Fair value hedges $ (2,335 ) Interest income Three Months Ended September 30, 2015 Fair value hedges $ — Interest income Nine Months Ended September 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 nine- month periods ended September 30, 2016 , and September 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 September 30, 2016 Interest rate swaps $ 1,336 Interest expense $ (492 ) Other income $ — Nine Months Ended September 30, 2016 Interest rate swaps $ (3,160 ) Interest expense $ (1,463 ) Other income $ — Three Months Ended September 30, 2015 Interest rate swaps $ (2,514 ) Interest expense $ (557 ) Other income $ — Nine Months Ended September 30, 2015 Interest rate swaps $ (1,336 ) Interest expense $ (1,680 ) Other income $ —
Balance Sheet Category and Fair Values of Embedded Derivatives	The table below identifies the notional amount, fair value and balance sheet category of Heartland's embedded derivatives at September 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 September 30, 2016 Embedded derivatives $ 14,668 $ 1,817 Other assets Other noninterest income $ (173 ) $ 243 December 31, 2015 Embedded derivatives $ 15,020 $ 1,574 Other assets Other noninterest income $ — $ — 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 embedded conversion option as of September 30, 2016 : Notional Amount Fair Value Balance Sheet Category Income Statement Category Quarter- to-Date Gain (Loss) Recognized Year- to-Date September 30, 2016 Embedded conversion option $ 558 $ (184 ) Other liabilities Other noninterest income $ 435 $ 138
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 September 30, 2016 , and December 31, 2015 , in thousands: Balance Sheet Category Notional Amount Fair Value September 30, 2016 Interest rate lock commitments (mortgage) Other assets $ 139,704 $ 6,239 Forward commitments Other assets 112,500 209 Forward commitments Other liabilities 285,248 (1,312 ) Undesignated interest rate swaps Other liabilities 22,620 (1,944 ) 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 nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended September 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (1,344 ) Forward commitments Gains on sale of loans held for sale 931 Undesignated interest rate swaps Other noninterest income 269 Nine Months Ended September 30, 2016 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 4,464 Forward commitments Gains on sale of loans held for sale (1,311 ) Undesignated interest rate swaps Other noninterest income (101 ) Three Months Ended September 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ (361 ) Forward commitments Gains on sale of loans held for sale (4,237 ) Nine Months Ended September 30, 2015 Interest rate lock commitments (mortgage) Gains on sale of loans held for sale $ 3,471 Forward commitments Gains on sale of loans held for sale (662 )

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 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 September 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 September 30, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 4,955 $ 530 $ 4,425 $ — Mortgage-backed securities 1,275,093 — 1,273,196 1,897 Obligations of states and political subdivisions 362,107 — 362,107 — Corporate debt securities — — — — Equity securities 13,541 — 13,541 — Derivative financial instruments (1) 5,228 — 5,228 — Interest rate lock commitments 6,239 — — 6,239 Forward commitments 209 — 209 — Total assets at fair value $ 1,667,372 $ 530 $ 1,658,706 $ 8,136 Liabilities Derivative financial instruments (2) $ 16,606 $ — $ 16,606 $ — Forward commitments 1,312 — 1,312 — Total liabilities at fair value $ 17,918 $ — $ 17,918 $ — 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 September 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 $ 2,366 $ — $ — $ 2,366 $ 190 Commercial real estate 14,707 — — 14,707 3,895 Agricultural and agricultural real estate 2,213 — — 2,213 — Residential real estate 3,200 — — 3,200 — Consumer 1,913 — — 1,913 — Total collateral dependent impaired loans $ 24,399 $ — $ — $ 24,399 $ 4,085 Other real estate owned $ 10,740 $ — $ — $ 10,740 $ 1,094 Premises, furniture and equipment held for sale $ 3,634 $ — $ 3,634 $ 255 Commercial servicing rights $ 332 $ — $ — $ 332 $ 41 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 9/30/16 Valuation Unobservable Range Z-TRANCHE Securities $ 1,897 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 17.09 - 35.91% (30.93%) Actual deferrals 8.22 - 22.82% (13.62%) Corporate debt securities — Discounted cash flows Bank analysis (1) Interest rate lock commitments 6,239 Discounted cash flows Closing ratio (2) Premises, furniture and equipment held for sale 3,634 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial servicing rights 332 Discounted cash flows Third party valuation (4) Other real estate owned 10,740 Modified appraised value Third party appraisal (3) Appraisal discount (3) Collateral dependent impaired loans: Commercial 2,366 Modified appraised value Third party appraisal (3) Appraisal discount (3) Commercial real estate 14,707 Modified appraised value Third party appraisal (3) Appraisal discount (3) Agricultural and agricultural real estate 2,213 Modified appraised value Third party appraisal (3) Appraisal discount (3) Residential real estate 3,200 Modified appraised value Third party appraisal (3) Appraisal discount (3) Consumer 1,913 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 September 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 Nine Months Ended September 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 (142 ) 982 Purchases, sales and settlements: Purchases — 6 Sales — (736 ) Settlements — (122 ) Balance at period end $ 1,897 $ 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 Nine Months Ended September 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 846 $ — Total gains (losses): Included in earnings 56 — Included in other comprehensive income (106 ) 106 Purchases, acquired, sales and settlements: Purchases — — Acquired — 740 Sales (796 ) — Settlements — — Balance at period end $ — $ 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 Nine Months Ended September 30, 2016 For the Year Ended December 31, 2015 Balance at January 1, $ 3,168 $ 2,496 Total gains (losses) included in earnings 4,464 288 Issuances 1,540 5,428 Settlements (2,933 ) (5,044 ) Balance at period end $ 6,239 $ 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 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 $ 202,089 $ 202,089 $ 202,089 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,655,696 1,655,696 530 1,653,269 1,897 Held to maturity 265,302 284,948 — 284,948 — Other investments 22,082 22,082 — 21,847 235 Loans held for sale 78,317 78,317 — 78,317 — Loans, net: Commercial 1,277,691 1,271,961 — 1,269,595 2,366 Commercial real estate 2,580,136 2,584,885 — 2,570,178 14,707 Agricultural and agricultural real estate 485,071 487,861 — 485,648 2,213 Residential real estate 622,684 618,770 — 615,570 3,200 Consumer 418,480 422,770 — 420,857 1,913 Total Loans, net 5,384,062 5,386,247 — 5,361,848 24,399 Derivative financial instruments (1) 5,228 5,228 — 5,228 — Interest rate lock commitments 6,239 6,239 — — 6,239 Forward commitments 209 209 — 209 — Financial liabilities: Deposits Demand deposits 2,238,736 2,238,736 — 2,238,736 — Savings deposits 3,753,300 3,753,300 — 3,753,300 — Time deposits 920,657 920,657 — 920,657 — Short term borrowings 214,105 214,105 — 214,105 — Other borrowings 294,493 297,018 — 297,018 — Derivative financial instruments (2) 16,606 16,606 — 16,606 — Forward commitments 1,312 1,312 — 1,312 — (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 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, embedded conversion options and free standing derivative instruments

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting	The following tables present financial information from Heartland's operating segments for the three- and nine- month periods ended September 30, 2016 , and September 30, 2015 , in thousands. Three Months Ended September 30, 2016 2015 Community and Other Banking Retail Mortgage Banking Total Community and Other Banking Retail Mortgage Banking Total Net interest income $ 72,694 $ 987 $ 73,681 $ 58,123 $ 1,601 $ 59,724 Provision for loan losses 5,328 — 5,328 3,181 — 3,181 Total noninterest income 17,337 11,205 28,542 16,015 8,965 24,980 Total noninterest expense 57,988 10,439 68,427 49,168 12,828 61,996 Income (loss) before taxes $ 26,715 $ 1,753 $ 28,468 $ 21,789 $ (2,262 ) $ 19,527 Average Loans, for the period $ 5,464,304 $ 73,784 $ 5,538,088 $ 4,563,221 $ 90,958 $ 4,654,179 Segment Assets, at period end $ 8,084,810 $ 117,405 $ 8,202,215 $ 6,676,526 $ 129,358 $ 6,805,884 Nine Months Ended September 30, 2016 2015 Community Retail Total Community Retail Total Net interest income $ 216,172 $ 3,334 $ 219,506 $ 167,000 $ 4,298 $ 171,298 Provision for loan losses 9,513 — 9,513 10,526 — 10,526 Total noninterest income 55,773 33,373 89,146 48,679 37,625 86,304 Total noninterest expense 177,421 32,335 209,756 145,614 39,478 185,092 Income before taxes $ 85,011 $ 4,372 $ 89,383 $ 59,539 $ 2,445 $ 61,984 Average Loans, for the period $ 5,422,843 $ 70,344 $ 5,493,187 $ 4,365,908 $ 91,807 $ 4,457,715 Segment Assets, at period end $ 8,084,810 $ 117,405 $ 8,202,215 $ 6,676,526 $ 129,358 $ 6,805,884

Basis of Presentation (Earnings

Basis of Presentation (Earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share
Net income attributable to Heartland	$ 20,208	$ 14,582	$ 61,187	$ 45,451
Preferred dividends	(53)	(205)	(273)	(613)
Interest expense on convertible preferred debt	17	0	48	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 20,172	$ 14,377	$ 60,962	$ 44,838
Weighted average common shares outstanding for basic earnings per share (in shares)	24,601	20,620	24,262	20,483
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units (in shares)	322	273	319	269
Weighted average common shares for diluted earnings per share (shares)	24,923	20,893	24,581	20,752
Earnings per common share — basic (in dollars per share)	$ 0.82	$ 0.70	$ 2.51	$ 2.19
Earnings per common share — diluted (in dollars per share)	$ 0.81	$ 0.69	$ 2.48	$ 2.16
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		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit from equity based awards			$ 1,100,000	$ 671,000
Options granted (in shares)			0	0
Vested options (in shares)			69,200	131,200
Vested options, weighted average exercise price (in dollars per share)			$ 23.55	$ 24.15
Vested options, weighted average remaining contractual life			10 months 9 days
Intrinsic value for vested options			$ 866,000
Intrinsic value for the total of all options exercised			$ 486,000
Maximum exercise period			10 years
Cash received from options exercised			$ 1,400,000	$ 1,900,000
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			$ 3,100,000	$ 2,600,000
Share-based unrecognized compensation costs			3,700,000
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
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 (in shares)			549,144
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	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)			24,153	22,648

Basis of Presentation (Summary

Basis of Presentation (Summary of RSUs activity) (Details) - RSUs - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Shares
Outstanding at beginning of period (in shares)	353,195	396,555
Granted (in shares)	143,721	139,943
Vested (in shares)	(117,898)	(151,681)
Forfeited (in shares)	(11,547)	(15,636)
Outstanding at end of period (in shares)	367,471	369,181
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 25.53	$ 21.48
Granted (in dollars per share)	29.75	28.90
Vested (in dollars per share)	23.44	17.98
Forfeited (in dollars per share)	27.12	25.08
Outstanding at end of period (in dollars per share)	$ 27.60	$ 25.56

Basis of Presentation (Summar32

Basis of Presentation (Summary of stock options activity) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Shares
Outstanding at beginning of period (in shares)	125,950	215,851
Granted (in shares)	0	0
Exercised (in shares)	(55,250)	(81,401)
Forfeited (in shares)	(1,500)	(3,250)
Outstanding at end of period (in shares)	69,200	131,200
Options exercisable at end of period (in shares)	69,200	131,200
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)	24.82	23.34
Forfeited (in dollars per share)	21.10	23.51
Outstanding at end of period (in dollars per share)	23.55	24.15
Options exercisable at end of period (in dollars per share)	$ 23.55	$ 24.15

Basis of Presentation (Subseque

Basis of Presentation (Subsequent Events) (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 08, 2016	Oct. 29, 2016	Sep. 30, 2016	Sep. 30, 2015	Nov. 02, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Assets			$ 8,202,215	$ 6,805,884		$ 7,694,754
Deposits			$ 6,912,693			$ 6,405,823
Common stock public offering (in shares)			30,000,000			30,000,000
Proceeds from issuance of common stock			$ 1,863	$ 2,330
Subsequent Event | Founders Bancorp
Subsequent Event [Line Items]
Total purchase price		$ 29,100
Percent of consideration in shares of common stock		70.00%
Percent of consideration in form of cash		30.00%
Subsequent Event | Founders Bancorp | Founders Bancorp
Subsequent Event [Line Items]
Assets		$ 198,500
Gross loans		106,600
Deposits		$ 180,500
Public Offering | Subsequent Event | Common Stock
Subsequent Event [Line Items]
Common stock public offering (in shares)					1,379,690
Public offering share price (usd per share)					$ 36.24
Proceeds from issuance of common stock	$ 49,700

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Feb. 05, 2016	Nov. 30, 2015	Sep. 11, 2015	Aug. 21, 2015	Jan. 16, 2015	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Business Acquisition [Line Items]
Assets						$ 8,202,215	$ 7,694,754	$ 6,805,884
Deposits						6,912,693	6,405,823
Goodwill						127,699	97,852
Nonaccrual loans						57,344	37,874
Premises, furniture and equipment held for sale						3,634	$ 3,889
CIC Bancshares, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 76,882
Purchase price paid by delivery of shares of common stock (shares)	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
Loans held to maturity	581,477
CIC Bancshares, Inc. | Preferred Stock
Business Acquisition [Line Items]
Convertible preferred stock issue, 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 (shares)		1,758,543
Purchase price in cash		$ 28,500
Assets		692,700
Loans		389,800
Deposits		622,700
Goodwill		41,000
Loans held to maturity		$ 389,800
First Scottsdale Bank, N.A.
Business Acquisition [Line Items]
Purchase price in cash			$ 17,700
Assets			81,200
Deposits			65,900
Goodwill			2,500
Loans held to maturity			$ 54,700
Community Bancorporation of New Mexico, Inc.
Business Acquisition [Line Items]
Purchase price in cash				$ 11,100
Assets				166,300
Deposits				147,400
Goodwill				213
Loans held to maturity				99,500
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 (shares)					1,970,720
Assets					$ 506,800
Deposits					433,900
Goodwill					18,600
Loans held to maturity					$ 395,000
Purchase price, percentage of adjusted tangible book value					155.00%

Acquisitions (Acquisition, fair

Acquisitions (Acquisition, fair values) (Details) - USD ($) $ in Thousands	Feb. 05, 2016	Sep. 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 (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 (shares)	2,003,235
CIC Bancshares, Inc. | Preferred Stock
Fair value of consideration paid:
Stock	$ 3,777
Stock (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	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,652,938	$ 1,584,703
Gross Unrealized Gains	24,512	15,849
Gross Unrealized Losses	(21,754)	(22,118)
Estimated Fair Value	1,655,696	1,578,434
Total debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,639,772	1,571,561
Gross Unrealized Gains	24,137	15,809
Gross Unrealized Losses	(21,754)	(22,074)
Estimated Fair Value	1,642,155	1,565,296
U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,830	25,847
Gross Unrealized Gains	125	22
Gross Unrealized Losses	0	(103)
Estimated Fair Value	4,955	25,766
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,281,459	1,254,452
Gross Unrealized Gains	14,401	9,134
Gross Unrealized Losses	(20,767)	(20,884)
Estimated Fair Value	1,275,093	1,242,702
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	353,483	290,522
Gross Unrealized Gains	9,611	6,547
Gross Unrealized Losses	(987)	(1,087)
Estimated Fair Value	362,107	295,982
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	740
Gross Unrealized Gains	0	106
Gross Unrealized Losses	0	0
Estimated Fair Value	0	846
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,166	13,142
Gross Unrealized Gains	375	40
Gross Unrealized Losses	0	(44)
Estimated Fair Value	$ 13,541	$ 13,138

Securities (Other-than-temporar

Securities (Other-than-temporary impairments) (Narrative) (Details)	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 31, 2012USD ($)security	Sep. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	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) | 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) | 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	0
Gross realized losses with OTTI write-downs		177,000		$ 609,000	1,332,000	$ 1,587,000
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
Obligations of states and political subdivisions
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Carrying value of held to maturity securities		503,000			$ 503,000
Realized gross gains (losses) on held to maturity securities		$ (1,500)

Securities (Held to maturity se

Securities (Held to maturity securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 265,302	$ 279,117
Gross Unrealized Gains	20,191	15,901
Gross Unrealized Losses	(545)	(505)
Estimated Fair Value	284,948	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	265,302	274,748
Gross Unrealized Gains	20,191	15,595
Gross Unrealized Losses	(545)	(505)
Estimated Fair Value	$ 284,948	$ 289,838

Securities (Other securities) (

Securities (Other securities) (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Fair value of securities pledged	$ 792.7	$ 855.8
FHLB	$ 14.9	$ 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%

Securities (Securities availa41

Securities (Securities available for sale (debt maturities)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in 1 year or less	$ 1,075
Due in 1 to 5 years	22,931
Due in 5 to 10 years	103,104
Due after 10 years	231,203
Total debt securities	358,313
Mortgage-backed securities	1,281,459
Equity securities	13,166
Amortized Cost	1,652,938	$ 1,584,703
Estimated Fair Value
Due in 1 year or less	1,078
Due in 1 to 5 years	23,277
Due in 5 to 10 years	105,529
Due after 10 years	237,178
Total debt securities	367,062
Mortgage-backed securities	1,275,093
Equity securities	13,541
Estimated Fair Value	$ 1,655,696	$ 1,578,434

Securities (Securities held to

Securities (Securities held to maturity (debt maturities)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in 1 year or less	$ 3,695
Due in 1 to 5 years	14,233
Due in 5 to 10 years	87,275
Due after 10 years	160,099
Total debt securities	265,302
Mortgage-backed securities	0
Amortized Cost	265,302	$ 279,117
Estimated Fair Value
Due in 1 year or less	3,760
Due in 1 to 5 years	15,163
Due in 5 to 10 years	92,278
Due after 10 years	173,747
Total debt securities	284,948
Mortgage-backed securities	0
Estimated Fair Value	$ 284,948	$ 294,513

Securities (Realized gain (loss

Securities (Realized gain (loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 146,242	$ 351,050	$ 768,617	$ 877,077
Gross security gains	1,763	2,416	11,416	10,857
Gross security losses	$ 177	$ 609	$ 1,332	$ 1,587

Securities (Available for sale

Securities (Available for sale securities losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value
Less than 12 months	$ 645,999	$ 821,737
12 months or longer	180,659	147,022
Total	826,658	968,759
Unrealized Losses
Less than 12 months	(15,303)	(16,566)
12 months or longer	(6,451)	(5,552)
Total	(21,754)	(22,118)
Total debt securities
Fair Value
Less than 12 months	645,999	815,171
12 months or longer	180,659	147,022
Total	826,658	962,193
Unrealized Losses
Less than 12 months	(15,303)	(16,522)
12 months or longer	(6,451)	(5,552)
Total	(21,754)	(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	575,105	724,330
12 months or longer	180,406	139,562
Total	755,511	863,892
Unrealized Losses
Less than 12 months	(14,317)	(15,523)
12 months or longer	(6,450)	(5,361)
Total	(20,767)	(20,884)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	70,894	68,482
12 months or longer	253	7,460
Total	71,147	75,942
Unrealized Losses
Less than 12 months	(986)	(896)
12 months or longer	(1)	(191)
Total	(987)	(1,087)
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 45

Securities (Held to maturity securities losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value
Less than 12 months	$ 2,639	$ 3,646
12 months or longer	1,123	18,033
Total	3,762	21,679
Unrealized Losses
Less than 12 months	(276)	(12)
12 months or longer	(269)	(493)
Total	(545)	(505)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	2,639	3,646
12 months or longer	1,123	18,033
Total	3,762	21,679
Unrealized Losses
Less than 12 months	(276)	(12)
12 months or longer	(269)	(493)
Total	$ (545)	$ (505)

Securities (Other-than-tempor46

Securities (Other-than-temporary impairments) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2012	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 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)	(72)
Total changes to AOCI for non-credit related impairment		0	(24)	(127)	(72)
Total OTTI losses (accretion) recorded on debt securities, net		$ 0	$ (24)	$ (127)	$ (72)

Loans (Loans receivable) (Detai

Loans (Loans receivable) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 5,441,546	$ 5,003,866
Unearned discount	(721)	(488)
Deferred loan fees	(2,110)	(1,892)
Total net loans receivable held to maturity	5,438,715	5,001,486
Allowance for loan losses	(54,653)	(48,685)
Loans receivable, net	5,384,062	4,952,801
Loans secured by residential real estate property in process of foreclosure	$ 1,500
Threshold period past due, nonperforming status of loans and leases	90 days
Commercial
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 3,900,612	3,605,574
Commercial | Minimum
Loans and Leases [Line Items]
Length of loan agreements	1 year
Commercial | Maximum
Loans and Leases [Line Items]
Length of loan agreements	5 years
Commercial | Commercial
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 1,295,316	1,279,214
Commercial | Commercial real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	2,605,296	2,326,360
Agricultural and agricultural real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	489,387	471,870
Residential real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 625,965	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 receivable held to maturity	$ 425,582	$ 386,867
Consumer | Citizens Finance Co | Loans and Finance Receivables
Loans and Leases [Line Items]
Concentration risk, percentage	19.00%

Loans (Allowance for credit los

Loans (Allowance for credit losses on financing receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	$ 7,542		$ 2,768
Ending Balance Under ASC 450-20	47,111		45,917
Total	54,653	$ 51,756	48,685	$ 47,105	$ 45,614	$ 41,449
Ending Balance Evaluated for Impairment Under ASC 310-10-35	110,357		80,221
Ending Balance Evaluated for Impairment Under ASC 450-20	5,331,189		4,923,645
Total	5,441,546		5,003,866
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,900,612		3,605,574
Commercial | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	2,077		471
Ending Balance Under ASC 450-20	14,814		15,624
Total	16,891	15,525	16,095	13,910	13,064	11,909
Ending Balance Evaluated for Impairment Under ASC 310-10-35	8,002		6,919
Ending Balance Evaluated for Impairment Under ASC 450-20	1,287,314		1,272,295
Total	1,295,316		1,279,214
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	2,661		698
Ending Balance Under ASC 450-20	21,020		18,834
Total	23,681	22,968	19,532	18,086	17,608	15,898
Ending Balance Evaluated for Impairment Under ASC 310-10-35	56,894		45,442
Ending Balance Evaluated for Impairment Under ASC 450-20	2,548,402		2,280,918
Total	2,605,296		2,326,360
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	967		0
Ending Balance Under ASC 450-20	4,039		3,887
Total	5,006	4,100	3,887	3,939	3,676	3,295
Ending Balance Evaluated for Impairment Under ASC 310-10-35	17,155		4,612
Ending Balance Evaluated for Impairment Under ASC 450-20	472,232		467,258
Total	489,387		471,870
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	473		393
Ending Balance Under ASC 450-20	1,509		1,541
Total	1,982	2,065	1,934	3,846	4,099	3,741
Ending Balance Evaluated for Impairment Under ASC 310-10-35	22,448		17,790
Ending Balance Evaluated for Impairment Under ASC 450-20	603,517		521,765
Total	625,965		539,555
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	1,364		1,206
Ending Balance Under ASC 450-20	5,729		6,031
Total	7,093	$ 7,098	7,237	$ 7,324	$ 7,167	$ 6,606
Ending Balance Evaluated for Impairment Under ASC 310-10-35	5,858		5,458
Ending Balance Evaluated for Impairment Under ASC 450-20	419,724		381,409
Total	$ 425,582		$ 386,867

Loans (Financing receivables, n

Loans (Financing receivables, non accrual status) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Nonaccrual loans	$ 57,344	$ 37,874
Nonaccrual troubled debt restructured loans	455	1,781
Total nonaccrual loans	57,799	39,655
Accruing loans past due 90 days or more	105	0
Performing troubled debt restructured loans	$ 10,281	$ 11,075

Loans (Troubled debt restructur

Loans (Troubled debt restructuring on loans modified) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	5	1	7	4
Pre- Modification Recorded Investment	$ 651	$ 55	$ 930	$ 5,188
Post- Modification Recorded Investment	$ 651	$ 55	$ 930	$ 5,188
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	2	2
Pre- Modification Recorded Investment	$ 0	$ 0	$ 279	$ 4,822
Post- Modification Recorded Investment	$ 0	$ 0	$ 279	$ 4,822
Commercial | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	1	1
Pre- Modification Recorded Investment	$ 0	$ 0	$ 100	$ 830
Post- Modification Recorded Investment	$ 0	$ 0	$ 100	$ 830
Commercial | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	1	1
Pre- Modification Recorded Investment	$ 0	$ 0	$ 179	$ 3,992
Post- Modification Recorded Investment	$ 0	$ 0	$ 179	$ 3,992
Agricultural and agricultural real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0	1
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 311
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 311
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	5	1	5	1
Pre- Modification Recorded Investment	$ 651	$ 55	$ 651	$ 55
Post- Modification Recorded Investment	$ 651	$ 55	$ 651	$ 55
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 (Troubled debt restruct51

Loans (Troubled debt restructuring with payment defaults) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1,000	1	1,000
Recorded Investment | $	$ 0	$ 814	$ 95	$ 814
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1,000	1	1,000
Recorded Investment | $	$ 0	$ 814	$ 95	$ 814
Commercial | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	1	0
Recorded Investment | $	$ 0	$ 0	$ 95	$ 0
Commercial | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1,000	0	1,000
Recorded Investment | $	$ 0	$ 814	$ 0	$ 814
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 (Troubled debt in text) (

Loans (Troubled debt in text) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable held to maturity	$ 5,441,546,000	$ 5,003,866,000
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable held to maturity	0
Loss
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable held to maturity	$ 0

Loans (Loans not covered by sha

Loans (Loans not covered by share agreements (credit quality indicator)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 5,441,546	$ 5,003,866
Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	5,044,115	4,541,863
Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	397,431	462,003
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	3,900,612	3,605,574
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	3,608,907	3,213,750
Commercial | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	291,705	391,824
Commercial | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	1,295,316	1,279,214
Commercial | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	1,196,389	1,106,276
Commercial | Commercial | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	98,927	172,938
Commercial | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	2,605,296	2,326,360
Commercial | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	2,412,518	2,107,474
Commercial | Commercial real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	192,778	218,886
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	489,387	471,870
Agricultural and agricultural real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	422,810	435,745
Agricultural and agricultural real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	66,577	36,125
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	625,965	539,555
Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	596,479	515,195
Residential real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	29,486	24,360
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	425,582	386,867
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	415,919	377,173
Consumer | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 9,663	$ 9,694

Loans (Loans not covered by s54

Loans (Loans not covered by share agreements (in text)) (Details)	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans delinquent 30 to 89 days, percentage	0.40%	0.31%
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	53.00%	68.00%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	47.00%	32.00%
Nonpass
Financing Receivable, Recorded Investment [Line Items]
Percent of nonaccrual loans	15.00%	8.00%

Loans (Loans not covered by s55

Loans (Loans not covered by share agreements (past due financing receivables)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 21,998	$ 15,348
Accruing Loans and Leases, Current	5,361,749	4,948,863
Nonaccrual	57,799	39,655
Total	5,441,546	5,003,866
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	18,276	11,561
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	3,617	3,787
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	105	0
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	12,586	8,239
Accruing Loans and Leases, Current	3,864,609	3,575,730
Nonaccrual	23,417	21,605
Total	3,900,612	3,605,574
Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	11,253	5,554
Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,242	2,685
Commercial | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	91	0
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	9,314	5,626
Accruing Loans and Leases, Current	2,576,946	2,302,052
Nonaccrual	19,036	18,682
Total	2,605,296	2,326,360
Commercial | Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	8,499	3,549
Commercial | Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	815	2,077
Commercial | Commercial real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	3,272	2,613
Accruing Loans and Leases, Current	1,287,663	1,273,678
Nonaccrual	4,381	2,923
Total	1,295,316	1,279,214
Commercial | Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,754	2,005
Commercial | Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	427	608
Commercial | Commercial | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	91	0
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,566	197
Accruing Loans and Leases, Current	473,708	470,455
Nonaccrual	14,113	1,218
Total	489,387	471,870
Agricultural and agricultural real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	93	143
Agricultural and agricultural real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	1,473	54
Agricultural and agricultural real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,184	2,015
Accruing Loans and Leases, Current	607,229	523,915
Nonaccrual	16,552	13,625
Total	625,965	539,555
Residential real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,042	1,900
Residential real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	142	115
Residential real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	5,662	4,897
Accruing Loans and Leases, Current	416,203	378,763
Nonaccrual	3,717	3,207
Total	425,582	386,867
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	4,888	3,964
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	760	933
Consumer | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 14	$ 0

Loans (Impaired loans not cover

Loans (Impaired loans not covered by loss share agreements) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Unpaid Contractual Balance
Total impaired loans with a related allowance	$ 30,013	$ 30,013	$ 9,210
Total impaired loans without a related allowance	85,593	85,593	74,644
Total impaired loans held to maturity	115,606	115,606	83,854
Loan Balance
Total impaired loans with a related allowance	29,514	29,514	9,093
Total impaired loans without a related allowance	80,843	80,843	71,128
Total impaired loans held to maturity	110,357	110,357	80,221
Related Allowance Recorded	7,542	7,542	2,768
Average Loan Balance
Total impaired loans with a related allowance	26,729	18,606	11,287
Total impaired loans without a related allowance	78,023	81,285	60,831
Total impaired loans held to maturity	104,752	99,891	72,118
Interest Income Recognized
Total impaired loans with a related allowance	229	477	80
Total impaired loans without a related allowance	701	1,942	2,268
Total impaired loans held to maturity	930	2,419	2,348
Commercial
Unpaid Contractual Balance
Total impaired loans with a related allowance	20,043	20,043	3,889
Total impaired loans without a related allowance	49,382	49,382	51,883
Total impaired loans held to maturity	69,425	69,425	55,772
Loan Balance
Total impaired loans with a related allowance	19,629	19,629	3,857
Total impaired loans without a related allowance	45,267	45,267	48,504
Total impaired loans held to maturity	64,896	64,896	52,361
Related Allowance Recorded	4,738	4,738	1,169
Average Loan Balance
Total impaired loans with a related allowance	18,817	11,680	3,063
Total impaired loans without a related allowance	41,656	48,750	45,955
Total impaired loans held to maturity	60,473	60,430	49,018
Interest Income Recognized
Total impaired loans with a related allowance	211	437	31
Total impaired loans without a related allowance	530	1,575	1,910
Total impaired loans held to maturity	741	2,012	1,941
Commercial | Commercial
Unpaid Contractual Balance
Total impaired loans with a related allowance	4,664	4,664	1,192
Total impaired loans without a related allowance	4,632	4,632	5,784
Total impaired loans held to maturity	9,296	9,296	6,976
Loan Balance
Total impaired loans with a related allowance	4,283	4,283	1,160
Total impaired loans without a related allowance	3,719	3,719	5,759
Total impaired loans held to maturity	8,002	8,002	6,919
Related Allowance Recorded	2,077	2,077	471
Average Loan Balance
Total impaired loans with a related allowance	3,121	2,566	524
Total impaired loans without a related allowance	4,413	7,105	7,511
Total impaired loans held to maturity	7,534	9,671	8,035
Interest Income Recognized
Total impaired loans with a related allowance	73	87	12
Total impaired loans without a related allowance	78	339	515
Total impaired loans held to maturity	151	426	527
Commercial | Commercial real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	15,379	15,379	2,697
Total impaired loans without a related allowance	44,750	44,750	46,099
Total impaired loans held to maturity	60,129	60,129	48,796
Loan Balance
Total impaired loans with a related allowance	15,346	15,346	2,697
Total impaired loans without a related allowance	41,548	41,548	42,745
Total impaired loans held to maturity	56,894	56,894	45,442
Related Allowance Recorded	2,661	2,661	698
Average Loan Balance
Total impaired loans with a related allowance	15,696	9,114	2,539
Total impaired loans without a related allowance	37,243	41,645	38,444
Total impaired loans held to maturity	52,939	50,759	40,983
Interest Income Recognized
Total impaired loans with a related allowance	138	350	19
Total impaired loans without a related allowance	452	1,236	1,395
Total impaired loans held to maturity	590	1,586	1,414
Agricultural and agricultural real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	3,181	3,181	0
Total impaired loans without a related allowance	13,974	13,974	4,612
Total impaired loans held to maturity	17,155	17,155	4,612
Loan Balance
Total impaired loans with a related allowance	3,181	3,181	0
Total impaired loans without a related allowance	13,974	13,974	4,612
Total impaired loans held to maturity	17,155	17,155	4,612
Related Allowance Recorded	967	967	0
Average Loan Balance
Total impaired loans with a related allowance	1,112	390	2,823
Total impaired loans without a related allowance	15,310	12,232	2,287
Total impaired loans held to maturity	16,422	12,622	5,110
Interest Income Recognized
Total impaired loans with a related allowance	0	0	0
Total impaired loans without a related allowance	23	118	175
Total impaired loans held to maturity	23	118	175
Residential real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	3,512	3,512	2,210
Total impaired loans without a related allowance	19,496	19,496	15,802
Total impaired loans held to maturity	23,008	23,008	18,012
Loan Balance
Total impaired loans with a related allowance	3,427	3,427	2,125
Total impaired loans without a related allowance	19,021	19,021	15,665
Total impaired loans held to maturity	22,448	22,448	17,790
Related Allowance Recorded	473	473	393
Average Loan Balance
Total impaired loans with a related allowance	3,602	3,285	2,524
Total impaired loans without a related allowance	18,660	17,684	10,186
Total impaired loans held to maturity	22,262	20,969	12,710
Interest Income Recognized
Total impaired loans with a related allowance	8	15	16
Total impaired loans without a related allowance	136	217	145
Total impaired loans held to maturity	144	232	161
Consumer
Unpaid Contractual Balance
Total impaired loans with a related allowance	3,277	3,277	3,111
Total impaired loans without a related allowance	2,741	2,741	2,347
Total impaired loans held to maturity	6,018	6,018	5,458
Loan Balance
Total impaired loans with a related allowance	3,277	3,277	3,111
Total impaired loans without a related allowance	2,581	2,581	2,347
Total impaired loans held to maturity	5,858	5,858	5,458
Related Allowance Recorded	1,364	1,364	1,206
Average Loan Balance
Total impaired loans with a related allowance	3,198	3,251	2,877
Total impaired loans without a related allowance	2,397	2,619	2,403
Total impaired loans held to maturity	5,595	5,870	5,280
Interest Income Recognized
Total impaired loans with a related allowance	10	25	33
Total impaired loans without a related allowance	12	32	38
Total impaired loans held to maturity	$ 22	$ 57	$ 71

Loans (Purchased impaired loans

Loans (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
Loans held to maturity	$ 581.5
Premier Valley Bank
Financing Receivable, Impaired [Line Items]
Loans		$ 400.5
Loans held to maturity		389.8
Estimated fair value of loans acquired		$ 389.8
First Scottsdale Bank, N.A.
Financing Receivable, Impaired [Line Items]
Loans			$ 56.5
Loans held to maturity			$ 54.7
Community Bancorporation of New Mexico, Inc.
Financing Receivable, Impaired [Line Items]
Loans				$ 103.7
Loans held to maturity				$ 99.5
Community Banc-Corp of Sheboygan, Inc.
Financing Receivable, Impaired [Line Items]
Loans					$ 413.4
Loans held to maturity					$ 395

Loans (Carrying amount loans no

Loans (Carrying amount loans not covered by loss share agreements) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	$ 6,675	$ 7,716
Non Impaired Purchased Loans	1,033,899	775,581
Total Purchased Loans	1,040,574	783,297
Commercial | Commercial
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	2,371	0
Non Impaired Purchased Loans	119,811	159,393
Total Purchased Loans	122,182	159,393
Commercial | Commercial real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	4,119	7,716
Non Impaired Purchased Loans	688,587	494,010
Total Purchased Loans	692,706	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	174	2,985
Total Purchased Loans	174	2,985
Residential real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	185	0
Non Impaired Purchased Loans	175,812	85,549
Total Purchased Loans	175,997	85,549
Consumer
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	49,515	33,644
Total Purchased Loans	$ 49,515	$ 33,644

Loans (Change in accretable yie

Loans (Change in accretable yield) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 168	$ 398	$ 557	$ 0
Original yield discount, net, at date of acquisitions	0	68	19	420
Accretion	(379)	(202)	(845)	(318)
Reclassification from nonaccretable difference	331	34	389	196
Balance at end of period	$ 120	$ 298	$ 120	$ 298

Loans (Carrying amount loans 60

Loans (Carrying amount loans not covered by loss share agreements (in text)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 54,653	$ 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	549
Contractually required payments receivable of nonimpaired loans	1,550,000
Estimated fair value of nonimpaired loans acquired	$ 1,510,000

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 51,756	$ 45,614	$ 48,685	$ 41,449
Charge-offs	(3,283)	(2,439)	(7,839)	(7,177)
Recoveries	852	749	4,294	2,307
Provision	5,328	3,181	9,513	10,526
Ending Balance	54,653	47,105	54,653	47,105
Commercial | Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	15,525	13,064	16,095	11,909
Charge-offs	(240)	(869)	(587)	(1,825)
Recoveries	119	87	438	518
Provision	1,487	1,628	945	3,308
Ending Balance	16,891	13,910	16,891	13,910
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	22,968	17,608	19,532	15,898
Charge-offs	(814)	(376)	(2,229)	(1,080)
Recoveries	467	357	3,056	853
Provision	1,060	497	3,322	2,415
Ending Balance	23,681	18,086	23,681	18,086
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,100	3,676	3,887	3,295
Charge-offs	0	0	0	(551)
Recoveries	2	5	9	29
Provision	904	258	1,110	1,166
Ending Balance	5,006	3,939	5,006	3,939
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	2,065	4,099	1,934	3,741
Charge-offs	(106)	(13)	(248)	(126)
Recoveries	1	71	25	178
Provision	22	(311)	271	53
Ending Balance	1,982	3,846	1,982	3,846
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	7,098	7,167	7,237	6,606
Charge-offs	(2,123)	(1,181)	(4,775)	(3,595)
Recoveries	263	229	766	729
Provision	1,855	1,109	3,865	3,584
Ending Balance	$ 7,093	$ 7,324	$ 7,093	$ 7,324

Goodwill, Core Deposit Premiu62

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	Sep. 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 Premiu63

Goodwill, Core Deposit Premium and Other Intangible Assets (Carrying amount of intangible assets (incl accumulated amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 100,584	$ 89,724
Accumulated Amortization	40,756	32,779
Net Carrying Amount	59,828	56,945
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,504	37,118
Accumulated Amortization	19,913	15,460
Net Carrying Amount	23,591	21,658
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	49,494	45,744
Accumulated Amortization	17,652	15,430
Net Carrying Amount	31,842	30,314
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,177	1,177
Accumulated Amortization	846	815
Net Carrying Amount	331	362
Commercial servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,409	5,685
Accumulated Amortization	2,345	1,074
Net Carrying Amount	$ 4,064	$ 4,611

Goodwill, Core Deposit Premiu64

Goodwill, Core Deposit Premium and Other Intangible Assets (Estimated future amortization expense for amortizable intangible assets) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Future amortization expense for amortizable intangible assets [Line Items]
Three months ending December 31, 2016	$ 4,416
Year ending December 31,
2,017	12,576
2,018	10,962
2,019	9,269
2,020	7,619
2,021	6,075
Thereafter	8,911
Total	59,828
Core deposit intangibles
Future amortization expense for amortizable intangible assets [Line Items]
Three months ending December 31, 2016	1,206
Year ending December 31,
2,017	4,409
2,018	3,900
2,019	3,418
2,020	2,975
2,021	2,457
Thereafter	5,226
Total	23,591
Mortgage servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Three months ending December 31, 2016	2,968
Year ending December 31,
2,017	7,219
2,018	6,187
2,019	5,156
2,020	4,125
2,021	3,094
Thereafter	3,093
Total	31,842
Customer relationship intangible
Future amortization expense for amortizable intangible assets [Line Items]
Three months ending December 31, 2016	10
Year ending December 31,
2,017	40
2,018	39
2,019	38
2,020	37
2,021	35
Thereafter	132
Total	331
Commercial servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Three months ending December 31, 2016	232
Year ending December 31,
2,017	908
2,018	836
2,019	657
2,020	482
2,021	489
Thereafter	460
Total	$ 4,064

Goodwill, Core Deposit Premiu65

Goodwill, Core Deposit Premium and Other Intangible Assets (Mortgage and commercial loans servicing) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Valuation servicing rights in tranches [Line Items]
Mortgage loans serviced for others	$ 4,260,000,000		$ 4,260,000,000		$ 4,060,000,000
Custodial escrow balances maintained	28,300,000		28,300,000		19,200,000
Loans serviced	35,906,000		35,906,000		34,926,000
Valuation allowance					0
Mortgage Servicing Rights
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	38,127,000	$ 40,166,000	$ 38,127,000	$ 40,166,000	$ 40,900,000
Prepayment rate			13.13%		10.65%
Discount rate			9.26%		9.25%
Fees collected for servicing of mortgage loans	3,100,000	2,600,000	$ 9,000,000	$ 7,800,000
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			1.41%	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	4,397,000	4,412,000	$ 4,397,000	$ 4,412,000
Fees collected for servicing of mortgage loans	230,000	$ 78,000	685,000	$ 438,000
Loans serviced	175,600,000		$ 175,600,000
Commercial Servicing Rights | Minimum
Valuation servicing rights in tranches [Line Items]
Prepayment rate			6.65%		7.33%
Discount rate			12.07%		12.35%
Average cap rate			0.031%	0.018%
Commercial Servicing Rights | Maximum
Valuation servicing rights in tranches [Line Items]
Prepayment rate			7.63%		8.10%
Discount rate			13.59%		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	1,246,000		$ 1,246,000		$ 1,297,000
Servicing asset, agreement term			20 years
Valuation allowance			$ 0		0
Commercial Servicing Rights More Than 20 Years
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	$ 3,151,000		$ 3,151,000		3,605,000
Servicing asset, agreement term			20 years
Valuation allowance			$ 41,000		$ 0

Goodwill, Core Deposit Premiu66

Goodwill, Core Deposit Premium and Other Intangible Assets (Changes in capitalized mortgage and commercial servicing rights) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Servicing Asset at Fair Value, Amount [Roll Forward]
Valuation allowance on commercial servicing rights	$ 5	$ 0	$ (41)	$ 0
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period			30,314	24,984
Originations			9,323	11,062
Amortization			(7,795)	(6,446)
Balance at end of period	31,842	29,600	31,842	29,600
Fair value of servicing rights	38,127	40,166	$ 38,127	$ 40,166	$ 40,900
Servicing rights, net to servicing portfolio (as a percent)			0.75%	0.75%
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			533	704
Amortization			(1,229)	(802)
Valuation allowance on commercial servicing rights			(41)	0
Balance at end of period	4,064	4,157	4,064	4,157
Fair value of servicing rights	$ 4,397	$ 4,412	$ 4,397	$ 4,412
Servicing rights, net to servicing portfolio (as a percent)			2.38%	2.33%

Goodwill, Core Deposit Premiu67

Goodwill, Core Deposit Premium and Other Intangible Assets (Book value, fair value of commercial serving rights and impairment) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 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	$ 1,112,000	1,237,000
Fair Value	1,246,000	1,297,000
Impairment	0	0
Less than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	25,000	0
Fair Value	27,000	0
Impairment	0	0
Less than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	171,000	189,000
Fair Value	188,000	200,000
Impairment	0	0
Less than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	916,000	1,048,000
Fair Value	1,031,000	1,097,000
Impairment	0	0
More than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	2,993,000	3,374,000
Fair Value	3,151,000	3,605,000
Impairment	41,000	0
More than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	118,000	0
Fair Value	121,000	0
Impairment	0	0
More than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	373,000	417,000
Fair Value	332,000	432,000
Impairment	41,000	0
More than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	2,502,000	2,957,000
Fair Value	2,698,000	3,173,000
Impairment	$ 0	$ 0

Derivative Financial Instrume68

Derivative Financial Instruments (Cash collateral on derivative financial instruments) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Cash pledged as collateral	$ 7,600,000	$ 5,300,000
Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 79,000

Derivative Financial Instrume69

Derivative Financial Instruments (Estimated cash payments and reclassification to interest expense) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in net unrealized losses on cash flow hedges	$ 1.5
Estimated amount to be reclassified from accumulated other comprehensive income to interest expense within the next twelve months	$ 2

Derivative Financial Instrume70

Derivative Financial Instruments (Executed interest rate swap) (Details) - Derivative Financial Instruments $ in Millions	Sep. 30, 2016USD ($)transaction	May 10, 2016USD ($)	Mar. 31, 2015USD ($)transaction	Apr. 05, 2011USD ($)
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 Instrume71

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) - Other liabilities - USD ($) $ in Thousands	Sep. 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	$ (1,263)	$ (713)
Receive Rate	0.857%	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	$ (236)	$ (600)
Receive Rate	0.842%	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	$ (1,626)	$ (1,582)
Receive Rate	0.657%	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	$ (163)	$ (83)
Receive Rate	0.857%	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	$ (160)	$ (83)
Receive Rate	0.857%	0.526%
Weighted Average Pay Rate	1.658%	1.658%
Interest Rate Swap due May 10, 2021
Derivatives, Fair Value [Line Items]
Notional Amount	$ 38,667
Fair Value	$ (352)
Receive Rate	3.018%
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	$ (1,391)	$ (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	$ (1,409)	$ (176)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.352%	2.352%

Derivative Financial Instrume72

Derivative Financial Instruments (Gains (losses) recognized on derivatives (cash flow hedges)) (Details) - Interest Rate Swap - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest Expense
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	$ 1,336	$ (2,514)	$ (3,160)	$ (1,336)
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	(492)	(557)	(1,463)	(1,680)
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 Instrume73

Derivative Financial Instruments (Narrative) (Details)	Sep. 30, 2016USD ($)shares	Feb. 05, 2016USD ($)shares	Sep. 30, 2016USD ($)shares	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)
Derivative [Line Items]
Cash pledged as collateral	$ 7,600,000		$ 7,600,000	$ 5,300,000
Number of shares to be issued upon conversion | shares	20,477	73,394
Amount of debt converted			1,400,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Cash pledged as collateral	$ 768,000,000		$ 768,000,000	0
Common Stock
Derivative [Line Items]
Number of shares issued in debt conversion (in shares) | shares			52,917
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	6,700,000		$ 6,700,000
Back-to-back Loan Swaps | Interest Rate Swap
Derivative [Line Items]
Cash pledged as collateral	$ 3,600,000		$ 3,600,000	$ 0

Derivative Financial Instrume74

Derivative Financial Instruments (Fair value hedge) (Details) - Other liabilities - USD ($)	Sep. 30, 2016	Feb. 05, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional Amount		$ 2,000,000
Fair Value Hedging
Derivative [Line Items]
Notional Amount	$ 41,007,000		$ 13,805,000
Fair Value	$ (4,467,000)		$ (621,000)

Derivative Financial Instrume75

Derivative Financial Instruments (Gains (losses) on fair value hedges) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Hedging | Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$ (225)	$ 0	$ (2,335)	$ 0

Derivative Financial Instrume76

Derivative Financial Instruments (Balance sheet and income statement category and fair value of embedded derivatives) (Details) - Embedded derivatives - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2016	Dec. 31, 2015
Other noninterest income
Derivative [Line Items]
Gain (Loss) Recognized	$ (173)	$ 0	$ 243	$ 0
Other assets
Derivative [Line Items]
Notional Amount	14,668	15,020	14,668	15,020
Fair Value	$ 1,817	$ 1,574	$ 1,817	$ 1,574

Derivative Financial Instrume77

Derivative Financial Instruments (Balance sheet and income statement category and fair values of embedded conversion option) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 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	$ 435,000	$ 138,000
Embedded conversion option | Other liabilities
Derivative [Line Items]
Notional Amount	558,000	558,000
Fair Value	$ (184,000)	$ (184,000)

Derivative Financial Instrume78

Derivative Financial Instruments (Loan swaps) (Details) - USD ($)	Sep. 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	$ 52,930,000		$ 15,782,000
Fair Value, Receive fixed-pay floating interest rate swap	$ 3,411,000		$ 663,000
Weighted Average Receive Rate	4.82%		5.08%
Weighted Average Pay Rate	3.34%		3.07%
Back-to-back Loan Swaps | Other liabilities
Derivative [Line Items]
Notional Amount	$ 52,930,000		$ 15,782,000
Fair Value, Pay fixed-receive floating interest rate swap	$ (3,411,000)		$ (663,000)
Weighted Average Receive Rate	3.34%		3.07%
Weighted Average Pay Rate	4.82%		5.08%

Derivative Financial Instrume79

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	Sep. 30, 2016	Dec. 31, 2015
Other assets | Interest rate lock commitments (mortgage)
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	$ 139,704	$ 99,665
Fair Value, Other Assets	6,239	3,168
Other assets | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	112,500	118,378
Fair Value, Other Assets	209	523
Other liabilities | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	285,248	136,709
Fair Value, Other Liabilities	(1,312)	(315)
Other liabilities | Undesignated interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	22,620	50,975
Fair Value, Other Liabilities	$ (1,944)	$ (3,677)

Derivative Financial Instrume80

Derivative Financial Instruments (Derivative instruments gains and losses recognized (not designated as hedging instruments)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 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	$ (1,344)	$ (361)	$ 4,464	$ 3,471
Gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	931	$ (4,237)	(1,311)	$ (662)
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 269		$ (101)

Fair Value (Fair value measurem

Fair Value (Fair value measurement recurring) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Securities available for sale	$ 1,655,696	$ 1,578,434
U.S. government corporations and agencies
Assets
Securities available for sale	4,955	25,766
Mortgage-backed securities
Assets
Securities available for sale	1,275,093	1,242,702
Obligations of states and political subdivisions
Assets
Securities available for sale	362,107	295,982
Corporate debt securities
Assets
Securities available for sale	0	846
Equity securities
Assets
Securities available for sale	13,541	13,138
Level 1
Assets
Securities available for sale	530	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	1,653,269	1,575,030
Derivative assets	5,228	2,237
Liabilities
Derivative liabilities	16,606	8,401
Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Level 2 | Forward commitments
Assets
Derivative assets	209	523
Liabilities
Derivative liabilities	1,312	315
Level 3
Assets
Securities available for sale	1,897	2,885
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 3 | Interest rate lock commitments
Assets
Derivative assets	6,239	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	0	846
Recurring Basis
Assets
Total assets at fair value	1,667,372	1,584,362
Liabilities
Total liabilities at fair value	17,918	8,716
Recurring Basis | Derivative financial instruments
Assets
Derivative assets	5,228	2,237
Liabilities
Derivative liabilities	16,606	8,401
Recurring Basis | Interest rate lock commitments
Assets
Derivative assets	6,239	3,168
Recurring Basis | Forward commitments
Assets
Derivative assets	209	523
Liabilities
Derivative liabilities	1,312	315
Recurring Basis | U.S. government corporations and agencies
Assets
Securities available for sale	4,955	25,766
Recurring Basis | Mortgage-backed securities
Assets
Securities available for sale	1,275,093	1,242,702
Recurring Basis | Obligations of states and political subdivisions
Assets
Securities available for sale	362,107	295,982
Recurring Basis | Corporate debt securities
Assets
Securities available for sale	0	846
Recurring Basis | Equity securities
Assets
Securities available for sale	13,541	13,138
Recurring Basis | Level 1
Assets
Total assets at fair value	530	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	530	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	1,658,706	1,577,790
Liabilities
Total liabilities at fair value	17,918	8,716
Recurring Basis | Level 2 | Derivative financial instruments
Assets
Derivative assets	5,228	2,237
Liabilities
Derivative liabilities	16,606	8,401
Recurring Basis | Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Recurring Basis | Level 2 | Forward commitments
Assets
Derivative assets	209	523
Liabilities
Derivative liabilities	1,312	315
Recurring Basis | Level 2 | U.S. government corporations and agencies
Assets
Securities available for sale	4,425	25,247
Recurring Basis | Level 2 | Mortgage-backed securities
Assets
Securities available for sale	1,273,196	1,240,663
Recurring Basis | Level 2 | Obligations of states and political subdivisions
Assets
Securities available for sale	362,107	295,982
Recurring Basis | Level 2 | Corporate debt securities
Assets
Securities available for sale	0	0
Recurring Basis | Level 2 | Equity securities
Assets
Securities available for sale	13,541	13,138
Recurring Basis | Level 3
Assets
Total assets at fair value	8,136	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	6,239	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	1,897	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	0	846
Recurring Basis | Level 3 | Equity securities
Assets
Securities available for sale	$ 0	$ 0

Fair Value (Fair value measur82

Fair Value (Fair value measurement non-recurring) (Details) - USD ($) $ in Thousands	Sep. 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	$ 3,634	$ 3,889
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	10,740	11,524
Significant Unobservable Inputs (Level 3) | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	332	0
Significant Unobservable Inputs (Level 3) | 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	3,634	3,889
Significant Unobservable Inputs (Level 3) | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,366	597
Significant Unobservable Inputs (Level 3) | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,707	1,522
Significant Unobservable Inputs (Level 3) | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,213	0
Significant Unobservable Inputs (Level 3) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,200	2,330
Significant Unobservable Inputs (Level 3) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,913	1,905
Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	24,399	6,354
Other real estate owned	10,740	11,524
Nonrecurring Basis | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	332	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	3,634	3,889
Nonrecurring Basis | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,366	597
Nonrecurring Basis | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,707	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	2,213	0
Nonrecurring Basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,200	2,330
Nonrecurring Basis | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,913	1,905
Nonrecurring Basis | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	4,085	272
Other real estate owned	1,094	5,520
Nonrecurring Basis | Year-to- Date Losses | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	41	0
Nonrecurring Basis | Year-to- Date Losses | 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	255	0
Nonrecurring Basis | Year-to- Date Losses | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	190	82
Nonrecurring Basis | Year-to- Date Losses | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,895	86
Nonrecurring Basis | Year-to- Date Losses | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Year-to- Date Losses | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	104
Nonrecurring Basis | Year-to- Date Losses | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
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 | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	0	0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | 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		0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	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 Other Observable Inputs (Level 2) | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | 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	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	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	24,399	6,354
Other real estate owned	10,740	11,524
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	332	0
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | 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	3,634	3,889
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,366	597
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,707	1,522
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,213	0
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,200	2,330
Nonrecurring Basis | Significant Unobservable Inputs (Level 3) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	$ 1,913	$ 1,905

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 fair value measurements) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 1,655,696	$ 1,578,434
Premises, furniture and equipment held for sale	$ 3,634	$ 3,889
Commercial servicing rights | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	12.07%	12.35%
Commercial servicing rights | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	13.59%	13.49%
Corporate debt securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 0	$ 846
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	1,897	2,885
Derivative assets	0	0
Other real estate owned	10,740	11,524
Level 3 | Commercial | Commercial
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	2,366	597
Level 3 | Commercial | Commercial real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	14,707	1,522
Level 3 | Agricultural and agricultural real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	2,213	0
Level 3 | Residential real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	3,200	2,330
Level 3 | Consumer
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	1,913	1,905
Level 3 | Commercial servicing rights
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Commercial servicing rights	332	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	3,634	3,889
Level 3 | Interest rate lock commitments
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Derivative assets	$ 6,239	$ 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	$ 1,897	$ 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)	17.09%	22.20%
Actual deferrals (as a percent)	8.22%	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)	35.91%	33.55%
Actual deferrals (as a percent)	22.82%	21.82%
Level 3 | Z-TRANCHE Securities | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Actual defaults (as a percent)	30.93%	30.60%
Actual deferrals (as a percent)	13.62%	13.36%
Level 3 | Corporate debt securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 0	$ 846

Fair Value (Changes Level 3 ass

Fair Value (Changes Level 3 assets (fair value, recurring)) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Purchases, acquired, sales and settlements:
Gains included in net gains on sale of loans held for sale	$ 23,938	$ 27,102
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	4,464		288
Purchases, acquired, sales and settlements:
Issuances	1,540		5,428
Settlements	(2,933)		(5,044)
Balance at period end	6,239		3,168
Gains included in net gains on sale of loans held for sale	6,200		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	(142)		982
Purchases, acquired, sales and settlements:
Purchases	0		6
Sales	0		(736)
Settlements	0		(122)
Balance at period end	1,897		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	56		0
Included in other comprehensive income	(106)		106
Purchases, acquired, sales and settlements:
Purchases	0		0
Acquired	0		740
Sales	(796)		0
Settlements	0		0
Balance at period end	$ 0		$ 846

Fair Value (Estimated fair valu

Fair Value (Estimated fair value financial instruments (incl. carrying amounts)) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Securities:
Securities available for sale	$ 1,655,696	$ 1,578,434
Held to maturity	284,948	294,513
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	202,089	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	530	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 | Commercial
Securities:
Loans, net	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial | 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	1,653,269	1,575,030
Held to maturity	284,948	294,513
Other investments	21,847	21,208
Loans held for sale	78,317	74,783
Loans, net	5,361,848	4,939,712
Derivative assets	5,228	2,237
Financial liabilities:
Short term borrowings	214,105	293,898
Other borrowings	297,018	281,271
Derivative liabilities	16,606	8,401
Significant Other Observable Inputs (Level 2) | Demand deposits
Financial liabilities:
Deposits	2,238,736	1,914,141
Significant Other Observable Inputs (Level 2) | Savings deposits
Financial liabilities:
Deposits	3,753,300	3,367,479
Significant Other Observable Inputs (Level 2) | Time deposits
Financial liabilities:
Deposits	920,657	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	209	523
Financial liabilities:
Derivative liabilities	1,312	315
Significant Other Observable Inputs (Level 2) | Commercial | Commercial
Securities:
Loans, net	1,269,595	1,256,758
Significant Other Observable Inputs (Level 2) | Commercial | Commercial real estate
Securities:
Loans, net	2,570,178	2,303,194
Significant Other Observable Inputs (Level 2) | Agricultural and agricultural real estate
Securities:
Loans, net	485,648	469,485
Significant Other Observable Inputs (Level 2) | Residential real estate
Securities:
Loans, net	615,570	529,601
Significant Other Observable Inputs (Level 2) | Consumer
Securities:
Loans, net	420,857	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	1,897	2,885
Held to maturity	0	0
Other investments	235	235
Loans held for sale	0	0
Loans, net	24,399	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	6,239	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 | Commercial
Securities:
Loans, net	2,366	597
Significant Unobservable Inputs (Level 3) | Commercial | Commercial real estate
Securities:
Loans, net	14,707	1,522
Significant Unobservable Inputs (Level 3) | Agricultural and agricultural real estate
Securities:
Loans, net	2,213	0
Significant Unobservable Inputs (Level 3) | Residential real estate
Securities:
Loans, net	3,200	2,330
Significant Unobservable Inputs (Level 3) | Consumer
Securities:
Loans, net	1,913	1,905
Carrying Amount
Financial assets:
Cash and cash equivalents	202,089	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	1,655,696	1,578,434
Held to maturity	265,302	279,117
Other investments	22,082	21,443
Loans held for sale	78,317	74,783
Loans, net	5,384,062	4,952,801
Derivative assets	5,228	2,237
Financial liabilities:
Short term borrowings	214,105	293,898
Other borrowings	294,493	263,214
Derivative liabilities	16,606	8,401
Carrying Amount | Demand deposits
Financial liabilities:
Deposits	2,238,736	1,914,141
Carrying Amount | Savings deposits
Financial liabilities:
Deposits	3,753,300	3,367,479
Carrying Amount | Time deposits
Financial liabilities:
Deposits	920,657	1,124,203
Carrying Amount | Interest rate lock commitments
Securities:
Derivative assets	6,239	3,168
Carrying Amount | Forward commitments
Securities:
Derivative assets	209	523
Financial liabilities:
Derivative liabilities	1,312	315
Carrying Amount | Commercial | Commercial
Securities:
Loans, net	1,277,691	1,262,612
Carrying Amount | Commercial | Commercial real estate
Securities:
Loans, net	2,580,136	2,305,908
Carrying Amount | Agricultural and agricultural real estate
Securities:
Loans, net	485,071	468,533
Carrying Amount | Residential real estate
Securities:
Loans, net	622,684	536,190
Carrying Amount | Consumer
Securities:
Loans, net	418,480	379,558
Estimated Fair Value
Financial assets:
Cash and cash equivalents	202,089	258,799
Time deposits in other financial institutions	2,105	2,355
Securities:
Securities available for sale	1,655,696	1,578,434
Held to maturity	284,948	294,513
Other investments	22,082	21,443
Loans held for sale	78,317	74,783
Loans, net	5,386,247	4,946,066
Derivative assets	5,228	2,237
Financial liabilities:
Short term borrowings	214,105	293,898
Other borrowings	297,018	281,271
Derivative liabilities	16,606	8,401
Estimated Fair Value | Demand deposits
Financial liabilities:
Deposits	2,238,736	1,914,141
Estimated Fair Value | Savings deposits
Financial liabilities:
Deposits	3,753,300	3,367,479
Estimated Fair Value | Time deposits
Financial liabilities:
Deposits	920,657	1,124,203
Estimated Fair Value | Interest rate lock commitments
Securities:
Derivative assets	6,239	3,168
Estimated Fair Value | Forward commitments
Securities:
Derivative assets	209	523
Financial liabilities:
Derivative liabilities	1,312	315
Estimated Fair Value | Commercial | Commercial
Securities:
Loans, net	1,271,961	1,257,355
Estimated Fair Value | Commercial | Commercial real estate
Securities:
Loans, net	2,584,885	2,304,716
Estimated Fair Value | Agricultural and agricultural real estate
Securities:
Loans, net	487,861	469,485
Estimated Fair Value | Residential real estate
Securities:
Loans, net	618,770	531,931
Estimated Fair Value | Consumer
Securities:
Loans, net	$ 422,770	$ 382,579

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)segment	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Segment Reporting [Abstract]
Number of operating segments (segment) | segment			2
Segment Reporting Information [Line Items]
Net interest income	$ 73,681	$ 59,724	$ 219,506	$ 171,298
Provision for loan losses	5,328	3,181	9,513	10,526
Total noninterest income	28,542	24,980	89,146	86,304
Total noninterest expense	68,427	61,996	209,756	185,092
Income before taxes	28,468	19,527	89,383	61,984
Average Loans, for the period	5,538,088	4,654,179	5,493,187	4,457,715
Segment Assets, at period end	8,202,215	6,805,884	8,202,215	6,805,884	$ 7,694,754
Community and Other Banking
Segment Reporting Information [Line Items]
Net interest income	72,694	58,123	216,172	167,000
Provision for loan losses	5,328	3,181	9,513	10,526
Total noninterest income	17,337	16,015	55,773	48,679
Total noninterest expense	57,988	49,168	177,421	145,614
Income before taxes	26,715	21,789	85,011	59,539
Average Loans, for the period	5,464,304	4,563,221	5,422,843	4,365,908
Segment Assets, at period end	8,084,810	6,676,526	8,084,810	6,676,526
Retail Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income	987	1,601	3,334	4,298
Provision for loan losses	0	0	0	0
Total noninterest income	11,205	8,965	33,373	37,625
Total noninterest expense	10,439	12,828	32,335	39,478
Income before taxes	1,753	(2,262)	4,372	2,445
Average Loans, for the period	73,784	90,958	70,344	91,807
Segment Assets, at period end	$ 117,405	$ 129,358	$ 117,405	$ 129,358