Heartland Financial USA (HTLF) 10-Q 5 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 03, 2017
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	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		26,674,871

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 129,386	$ 151,290
Interest bearing deposits with the Federal Reserve Bank and other banks and other short-term investments	43,765	7,434
Cash and cash equivalents	173,151	158,724
Time deposits in other financial institutions	41,539	2,105
Securities:
Available for sale, at fair value (cost of $1,938,457 at March 31, 2017, and $1,893,947 at December 31, 2016)	1,893,528	1,845,864
Held to maturity, at cost (fair value of $272,797 at March 31, 2017, and $274,799 at December 31, 2016)	260,616	263,662
Other investments, at cost	21,557	21,560
Loans held for sale	49,009	61,261
Loans receivable:
Held to maturity	5,361,604	5,351,719
Allowance for loan losses	(54,999)	(54,324)
Loans receivable, net	5,306,605	5,297,395
Premises, furniture and equipment, net	164,183	163,614
Premises, furniture and equipment held for sale	1,242	414
Other real estate, net	11,188	9,744
Goodwill	141,461	127,699
Core deposit intangibles and customer relationship intangibles, net	24,068	22,775
Servicing rights, net	35,441	35,778
Cash surrender value on life insurance	117,613	112,615
Other assets	120,644	123,869
TOTAL ASSETS	8,361,845	8,247,079
Deposits:
Demand	2,319,256	2,202,036
Savings	3,940,146	3,788,089
Time	830,459	857,286
Total deposits	7,089,861	6,847,411
Short-term borrowings	155,025	306,459
Other borrowings	282,051	288,534
Accrued expenses and other liabilities	53,596	63,759
TOTAL LIABILITIES	7,580,533	7,506,163
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 30,000,000 shares authorized at both March 31, 2017, and December 31, 2016; issued 26,674,121 shares at March 31, 2017, and 26,119,929 shares at December 31, 2016)	26,674	26,120
Capital surplus	351,423	328,376
Retained earnings	431,219	416,109
Accumulated other comprehensive income (loss)	(28,942)	(31,046)
Treasury stock at cost (0 shares at both March 31, 2017, and December 31, 2016)	0	0
TOTAL STOCKHOLDERS' EQUITY	781,312	740,916
TOTAL LIABILITIES AND EQUITY	8,361,845	8,247,079
Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series A Junior Participating Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series D Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 938	$ 1,357

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Cost of available for sale securities	$ 1,938,457	$ 1,893,947
Fair value of held to maturity securities	$ 272,797	$ 274,799
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)	26,674,121	26,119,929
Treasury stock (shares)	0	0
Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (shares)	17,604	17,604
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Series A Junior Participating Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (shares)	16,000	16,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (shares)	81,698	81,698
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Series D Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (shares)	3,000	3,000
Preferred stock, shares issued (shares)	745	1,078
Preferred stock, shares outstanding (shares)	745	1,078

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
INTEREST INCOME:
Interest and fees on loans	$ 66,898	$ 68,425
Interest on securities:
Taxable	8,253	8,644
Nontaxable	5,191	3,510
Interest on federal funds sold	0	10
Interest on interest bearing deposits in other financial institutions	209	95
TOTAL INTEREST INCOME	80,551	80,684
INTEREST EXPENSE:
Interest on deposits	3,730	4,173
Interest on short-term borrowings	137	329
Interest on other borrowings (includes $397 and $506 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended March 31, 2017 and 2016, respectively)	3,656	3,475
TOTAL INTEREST EXPENSE	7,523	7,977
NET INTEREST INCOME	73,028	72,707
Provision for loan losses	3,641	2,067
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	69,387	70,640
NONINTEREST INCOME:
Service charges and fees	9,457	7,162
Loan servicing income	1,724	1,268
Trust fees	3,631	3,813
Brokerage and insurance commissions	1,036	1,022
Securities gains, net (includes $2,482 and $3,756 of net security gains reclassified from accumulated other comprehensive income for the three months ended March 31, 2017 and 2016, respectively)	2,482	3,526
Net gains on sale of loans held for sale	6,147	11,065
Valuation allowance on commercial servicing rights	5	0
Income on bank owned life insurance	617	522
Other noninterest income	794	1,200
TOTAL NONINTEREST INCOME	25,893	29,578
NONINTEREST EXPENSES:
Salaries and employee benefits	41,767	41,714
Occupancy	5,073	5,003
Furniture and equipment	2,501	2,113
Professional fees	8,309	7,010
FDIC insurance assessments	807	1,168
Advertising	2,424	1,284
Core deposit intangibles and customer relationship intangibles amortization	1,171	1,895
Other real estate and loan collection expenses	828	572
Loss on sales/valuations of assets, net	412	313
Other noninterest expenses	8,448	9,237
TOTAL NONINTEREST EXPENSES	71,740	70,309
Income (loss) before taxes	23,540	29,909
Income taxes (includes $778 and $1,212 of income tax expense reclassified from accumulated other comprehensive income for the three months ended March 31, 2017 and 2016, respectively)	5,530	9,900
NET INCOME	18,010	20,009
Preferred dividends	(19)	(168)
Interest expense on convertible preferred debt	5	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 17,996	$ 19,841
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.68	$ 0.84
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.68	0.82
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.11	$ 0.10

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest expense related to derivatives reclassified from accumulated other comprehensive income	$ 3,656	$ 3,475
Net security gains reclassified from accumulated other comprehensive income	2,482	3,526
Income tax expense reclassified from accumulated other comprehensive income	5,530	9,900
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Derivatives
Interest expense related to derivatives reclassified from accumulated other comprehensive income	397	506
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Net security gains reclassified from accumulated other comprehensive income	2,482	3,756
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income (Loss)
Income tax expense reclassified from accumulated other comprehensive income	$ 778	$ 1,212

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 18,010	$ 20,009
Securities:
Net change in unrealized gain on securities	5,379	20,067
Reclassification adjustment for net gains realized in net income	(2,482)	(3,756)
Net change in non-credit related other than temporary impairment	0	7
Income taxes	(1,111)	(6,524)
Other comprehensive income on securities	1,786	9,794
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain (loss) on derivatives	136	(3,423)
Reclassification adjustment for net losses on derivatives realized in net income	397	506
Income taxes	(215)	1,074
Other comprehensive income (loss) on cash flow hedges	318	(1,843)
Other comprehensive income	2,104	7,951
TOTAL COMPREHENSIVE INCOME	$ 20,114	$ 27,960

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 18,010	$ 20,009
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,023	7,713
Provision for loan losses	3,641	2,067
Net amortization of premium on securities	7,226	7,846
Securities gains, net	(2,482)	(3,526)
Stock based compensation	1,782	1,087
Write downs and losses on sales of assets, net	412	313
Loans originated for sale	(164,324)	(227,823)
Proceeds on sales of loans held for sale	180,404	234,516
Net gains on sale of loans held for sale	(3,828)	(8,475)
Decrease in accrued interest receivable	93	787
Decrease in prepaid expenses	84	598
Increase in accrued interest payable	825	637
Capitalization of servicing rights	(2,226)	(2,590)
Valuation allowance on commercial servicing rights	(5)	0
Net excess tax benefit from stock based compensation	888	1,100
Other, net	(13,767)	(9,855)
NET CASH PROVIDED BY OPERATING ACTIVITIES	33,756	24,404
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	221,637	303,448
Proceeds from the sale of securities held to maturity	0	4,057
Proceeds from the sale of other investments	0	2,830
Proceeds from the redemption of time deposits in other financial institutions	5,867	0
Proceeds from the maturity of and principal paydowns on securities available for sale	47,515	35,379
Proceeds from the maturity of and principal paydowns on securities held to maturity	2,823	3,254
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	3,185	0
Proceeds from the maturity of and principal paydowns on other investments	1,521	0
Purchase of securities available for sale	(312,769)	(362,764)
Purchase of other investments	(968)	(226)
Net decrease in loans	80,916	78,502
Capital expenditures	(3,588)	(898)
Net cash and cash equivalents received in acquisitions	33,698	8,084
Proceeds from the sale of equipment	3	0
Proceeds on sale of OREO and other repossessed assets	585	2,384
NET CASH PROVIDED BY INVESTING ACTIVITIES	80,425	74,050
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits	22,799	1,098
Net increase in savings deposits	88,767	661
Net decrease in time deposit accounts	(50,612)	(131,373)
Net increase (decrease) in short-term borrowings	(131,068)	1,077
Proceeds from short term FHLB advances	60,939	5,000
Repayments of short term FHLB advances	(81,305)	(10,000)
Repayments of other borrowings	(6,432)	(5,501)
Redemption of preferred stock	0	(81,698)
Purchase of treasury stock	(160)	(1,227)
Proceeds from issuance of common stock	218	563
Dividends paid	(2,900)	(2,625)
NET CASH USED BY FINANCING ACTIVITIES	(99,754)	(224,025)
Net increase (decrease) in cash and cash equivalents	14,427	(125,571)
Cash and cash equivalents at beginning of year	158,724	258,799
CASH AND CASH EQUIVALENTS AT END OF PERIOD	173,151	133,228
Supplemental disclosures:
Cash paid for income/franchise taxes	5	2,305
Cash paid for interest	6,698	7,340
Loans transferred to OREO	2,680	442
Purchases of securities available for sale, accrued, not paid	3,654	0
Sales of securities available for sale, accrued, not settled	0	17,189
Conversion of convertible debt to common stock	167	0
Conversion of Series D preferred stock to common stock	419	0
Stock consideration granted for acquisitions	$ 22,589	$ 57,433

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 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, 2015	$ 663,173			$ 81,698		$ 22,436	$ 216,436	$ 348,630			$ (6,027)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	27,960							20,009			7,951
Cash dividends declared:
Series C/D Preferred		$ (168)							$ (168)
Common	(2,457)							(2,457)
Redemption of Series C Preferred Stock					$ (81,698)
Issuance of Series D Preferred Stock					3,777
Purchase of shares of common stock	(1,227)											(1,227)
Issuance of shares of common stock	59,096					2,084	55,787					1,225
Stock based compensation	1,087						1,087
Balance at end of period at Mar. 31, 2016	669,543			3,777		24,520	273,310	366,014			1,924	(2)
Balance at beginning of period at Dec. 31, 2016	740,916			1,357		26,120	328,376	416,109			(31,046)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	20,114							18,010			2,104
Cash dividends declared:
Series C/D Preferred			$ (19)							$ (19)
Common	(2,881)							(2,881)
Conversion of Series D preferred stock					$ (419)
Purchase of shares of common stock	(160)											(160)
Issuance of shares of common stock	21,979					554	21,265					160
Stock based compensation	1,782						1,782
Balance at end of period at Mar. 31, 2017	$ 781,312			$ 938		$ 26,674	$ 351,423	$ 431,219			$ (28,942)	$ 0

Consolidated Statements of Cha9

Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash dividends per share common stock (in dollars per share)	$ 0.11	$ 0.10
Shares of common stock purchased (in shares)	3,338	20,070
Shares of common stock issued (in shares)	557,530	2,104,305
Series C Preferred Stock
Cash dividends per share preferred stock (in dollars per share)		$ 2.50
Series D Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 17.50

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2017
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, 2016 , included in the Form 10-K of Heartland Financial USA, Inc. ("Heartland") filed with the Securities and Exchange Commission ("SEC") on March 1, 2017 . 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 March 31, 2017 , are not necessarily indicative of the results expected for the year ending December 31, 2017 . Earnings Per Share Basic earnings per share is determined using net income available to common stockholders and weighted average common shares outstanding. Diluted earnings per share is computed by dividing net income available to common stockholders by the weighted average common shares and assumed incremental common shares issued. Amounts used in the determination of basic and diluted earnings per share for the three -month periods ended March 31, 2017 and 2016 , are shown in the table below: Three Months Ended (Dollars and number of shares in thousands, except per share data) 2017 2016 Net income attributable to Heartland $ 18,010 $ 20,009 Preferred dividends (19 ) (168 ) Interest expense on convertible preferred debt 5 — Net income available to common stockholders $ 17,996 $ 19,841 Weighted average common shares outstanding for basic earnings per share 26,335 23,657 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 293 460 Weighted average common shares for diluted earnings per share 26,628 24,117 Earnings per common share — basic $ 0.68 $ 0.84 Earnings per common share — diluted $ 0.68 $ 0.82 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — 57 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 March 31, 2017 , 507,226 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 as a tax benefit in Heartland's income tax expense was $888,000 during the three months ended March 31, 2017. Prior to the adoption of ASU 2016-09 on January 1, 2017, $1.1 million of tax benefit related to the exercise, vesting and forfeiture of equity based awards was reflected in additional paid-in-capital during the three months ended March 31, 2016. Restricted Stock Units The Plan permits the Compensation Committee to grant restricted stock units ("RSUs"). In the first quarter of 2017, the Compensation Committee granted time-based RSUs with respect to 55,665 shares of common stock, and in the first quarter of 2016, the Compensation Committee granted time-based RSUs with respect to 72,644 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. These time-based RSUs vest over three years in equal installments on the first, second and third 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 27,570 shares of common stock in the first quarter of 2017, and 35,516 shares of common stock in the first quarter of 2016. These performance-based RSUs are earned based on satisfaction of performance targets for the fiscal years ended December 31, 2017, and December 31, 2016, respectively, and then fully vest two years after the end of the performance period. For the grants awarded in 2017, the portion of the RSUs earned based on performance vests on December 31, 2019, and for the grants awarded in 2016, the portion of the RSUs earned based on performance vests on December 31, 2018, 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 three-year performance-based RSUs with respect to 9,032 shares of common stock in the first quarter of 2017, and 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, 2019 and December 31, 2018, respectively. These performance-based RSUs will vest in 2020 and 2019, respectively, 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 as incentives. During the three months ended March 31, 2017 , and March 31, 2016 , 0 and 150 RSUs, respectively, were granted to directors and new employees. A summary of the RSUs outstanding as of March 31, 2017 and 2016 , and changes during the three months ended March 31, 2017 and 2016 , follows: 2017 2016 Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 346,817 $ 27.61 353,195 $ 25.53 Granted 92,267 47.50 119,718 29.05 Vested (103,897 ) 24.74 (83,982 ) 20.79 Forfeited (7,765 ) 31.03 (2,078 ) 27.17 Outstanding at March 31 327,422 $ 34.04 386,853 $ 27.53 Total compensation costs recorded for RSUs were $1.7 million and $1.1 million for the three -month periods ended March 31, 2017 and 2016 . As of March 31, 2017 , there were $5.4 million of total unrecognized compensation costs related to the Plan for RSUs that are expected to be recognized through 2020. Options Although the Plan provides authority to the Compensation Committee to grant stock options, no options were granted during the first three months of 2017 and 2016 . 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 March 31, 2017 and 2016 , and changes during the three months ended March 31, 2017 and 2016 , follows: 2017 2016 Shares Weighted-Average Exercise Price Shares Weighted-Average Exercise Price Outstanding at January 1 26,400 $ 18.60 125,950 $ 24.08 Granted — — — — Exercised (5,500 ) 18.60 (19,750 ) 21.60 Forfeited — — (1,250 ) 21.60 Outstanding at March 31 20,900 $ 18.60 104,950 $ 24.58 Options exercisable at March 31 20,900 $ 18.60 104,950 $ 24.58 At March 31, 2017 , the vested options totale d 20,900 shares with a weighted average exercise price of $ 18.60 per share and a weighted average remaining contractual life of 0.82 years. The intrinsic value (the difference between the market price and the aggregate exercise price) for the vested options as of March 31, 2017 , was $655,000 . The intrinsic value for the total of all options exercised during the three months ended March 31, 2017 , was $161,000 . 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 $ 102,000 for the three months ended March 31, 2017 , and $427,000 for the three months ended March 31, 2016 . Total compensation costs recorded for options were $0 for both three month periods ended March 31, 2017 and 2016 . There are no unrecorded compensation costs related to options at March 31, 2017 . No stock options vested during the three -month periods ended March 31, 2017 and 2016 . Subsequent Events - Heartland has evaluated subsequent events that may require recognition or disclosure through the filing date of this Quarterly Report on Form 10-Q with the SEC. Based on this evaluation, Heartland has determined that none of these events were required to be recognized or disclosed in the consolidated financial statements and related notes. 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 new guidance does not apply to certain contracts within the scope of other ASC Topics, such as lease contracts, insurance contracts, financing arrangements, financial instruments, guarantees other than product or service warranties and nonmonetary exchanges between entities in the same line of business to facilitate sales to customers. Heartland intends to adopt the accounting standard in 2018, as required, which may require a change in the recognition of certain recurring revenue streams within trust and investment management fees; however, the adoption of these amendments are not expected to have a significant effect on 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) require equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplify 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 leases on-balance sheet and disclose key information about leasing arrangements. The new standard establishes a right-of-use model (ROU) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as financing or operating, with classification affecting the pattern and classification of expense recognition in the income statement. 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 leases certain properties and equipment under operating leases that will result in recognition of lease assets and lease liabilities on the consolidated balance sheets under the ASU; however the majority of Heartland's properties and equipment are owned, not leased. Heartland intends to adopt the accounting standard in 2019 as required. 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 adopted this ASU on January 1, 2017, as required, using a prospective transition method. The requirement to report the excess tax benefit or shortfall related to settlements of share-based payment awards in earnings as an increase or decrease to tax expense has been applied to settlements occurring on or after January 1, 2017, and the impact of applying that guidance reduced reported income tax expense by $888,000 . ASU 2016-09 also requires that all income tax-related cash flows resulting from share-based payments be reported as an operating activity in the consolidated statements of cash flow. Previously income tax benefits resulting from the settlement of a share-based payment award were reported as a reduction of operating cash flows and an increase to financing cash flows to the extent that those benefits exceeded the income tax benefits reported in earnings during period in which the share-based payment awards vested. Heartland elected to adopt the change in cash flow classification on a retrospective basis, which resulted in a $1.1 million increase to net cash from operating activities and a corresponding decrease to net cash from financing activities in the accompanying consolidated statement of cash flows for the three months ended March 31, 2016. Heartland has elected to account for forfeitures as they occur. 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. In January 2017, the FASB issued ASU 2017-4, "Intangibles - Goodwill and Other (Topic 350)." This amendment is to simplify the subsequent measurement of goodwill by eliminating step two from the goodwill impairment test. Instead, an entity will perform only step one of its quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and then recognizing the impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity will still have the option to perform a qualitative assessment for a reporting unit to determine if the quantitative step one impairment test is necessary. This amendment is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied prospectively. Early adoption is permitted, including in an interim period for impairment tests performed after January 1, 2017. Heartland intends to adopt this ASU in the third quarter of 2020, consistent with the annual impairment test as of September 30 each year, and is currently evaluating the potential impact of this guidance on its results of operations, financial position and liquidity. In March 2017, the FASB issued ASU 2017-08, "Receivables - Nonrefundable Fee and Other Costs (Subtopic 310-20)." These amendments shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount. Discounts continue to be amortized to maturity. These amendments are effective for public business entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. If any entity early adopts in an interim period, any adjustments should be reflected as to the beginning of the fiscal year that includes the interim period. The amendments should be applied on a modified retrospective basis, with a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Heartland intends to adopt this ASU in 2019, as required, and is currently evaluating the potential impact on its results of operations, financial position, and liquidity.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Citywide Banks of Colorado, Inc. On February 13, 2017, Heartland entered into a definitive merger agreement with Citywide Banks of Colorado, Inc., parent company of Citywide Banks, headquartered in Aurora, Colorado. Under the terms of the definitive merger agreement, Heartland will acquire Citywide Banks of Colorado Inc., in a transaction valued at approximately $203.0 million as of the announcement date, subject to certain adjustments. Citywide Banks of Colorado, Inc. common shareholders will receive a combination of Heartland common stock and cash. The transaction is subject to customary closing conditions, including approval by shareholders of Citywide Banks of Colorado, Inc., and bank regulatory authorities. The transaction is also subject to Heartland stockholders approving an increase in the number of authorized shares of Heartland common stock at the 2017 annual meeting of stockholders. The transaction is expected to close in the third quarter of 2017, and simultaneous with the closing, Citywide Banks will merge into Heartland's Centennial Bank and Trust subsidiary. The combined entity will operate as Citywide Banks. As of March 31, 2017, Citywide Banks had total assets of $1.35 billion , including $982.0 million in net loans outstanding, and $1.17 billion of deposits. Founders Bancorp On February 28, 2017, Heartland acquired Founders Bancorp, parent company of Founders Community Bank, based in San Luis Obispo, California. The purchase price was approximately $31.0 million , which was paid by delivery of 455,877 shares of Heartland common stock and cash of $8.4 million . The transaction included, at fair value, total assets of $213.9 million , loans of $96.4 million , and deposits of $181.5 million on the acquisition date. The transaction also included one bank building with a fair value of $576,000 that Heartland intends to sell and is part of the balance of premises, furniture and equipment held for sale on the consolidated balance sheet. Simultaneous with the closing of the transaction, Founders Community Bank merged into Heartland's Premier Valley Bank subsidiary. The transaction was a tax-free reorganization with respect to the stock consideration received by the stockholders of Founders Bancorp. 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.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , and December 31, 2016 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value March 31, 2017 U.S. government corporations and agencies $ 15,027 $ 71 $ (31 ) $ 15,067 Mortgage-backed securities 1,319,662 3,859 (34,994 ) 1,288,527 Obligations of states and political subdivisions 588,559 2,997 (16,963 ) 574,593 Total debt securities 1,923,248 6,927 (51,988 ) 1,878,187 Equity securities 15,209 132 — 15,341 Total $ 1,938,457 $ 7,059 $ (51,988 ) $ 1,893,528 December 31, 2016 U.S. government corporations and agencies $ 4,716 $ 16 $ (32 ) $ 4,700 Mortgage-backed securities 1,321,760 7,026 (38,286 ) 1,290,500 Obligations of states and political subdivisions 553,020 2,436 (19,312 ) 536,144 Total debt securities 1,879,496 9,478 (57,630 ) 1,831,344 Equity securities 14,451 69 — 14,520 Total $ 1,893,947 $ 9,547 $ (57,630 ) $ 1,845,864 The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of March 31, 2017 , and December 31, 2016 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value March 31, 2017 Obligations of states and political subdivisions 260,616 13,176 (995 ) 272,797 Total $ 260,616 $ 13,176 $ (995 ) $ 272,797 December 31, 2016 Obligations of states and political subdivisions 263,662 12,282 (1,145 ) 274,799 Total $ 263,662 $ 12,282 $ (1,145 ) $ 274,799 At March 31, 2017, 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 March 31, 2017 , 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. March 31, 2017 Amortized Cost Estimated Fair Value Due in 1 year or less $ 380 $ 380 Due in 1 to 5 years 47,478 47,375 Due in 5 to 10 years 96,785 94,282 Due after 10 years 458,943 447,623 Total debt securities 603,586 589,660 Mortgage-backed securities 1,319,662 1,288,527 Equity securities 15,209 15,341 Total investment securities $ 1,938,457 $ 1,893,528 The amortized cost and estimated fair value of debt securities held to maturity at March 31, 2017 , 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. March 31, 2017 Amortized Cost Estimated Fair Value Due in 1 year or less $ 1,993 $ 2,022 Due in 1 to 5 years 19,307 20,246 Due in 5 to 10 years 89,388 92,873 Due after 10 years 149,928 157,656 Total investment securities $ 260,616 $ 272,797 As of March 31, 2017 , and December 31, 2016 , securities with a fair value of $714.5 million and $810.6 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 -month periods ended March 31, 2017 and 2016 , are summarized as follows, in thousands: Three Months Ended 2017 2016 Proceeds from sales $ 221,637 $ 303,448 Gross security gains 3,830 4,558 Gross security losses 1,339 682 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 March 31, 2017 , and December 31, 2016 . 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 March 31, 2016, and December 31, 2015 , respectively. Securities for which Heartland has taken credit-related other-than-temporary impairment ("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 March 31, 2017 U.S. government corporations and agencies $ 4,071 $ (31 ) $ — $ — $ 4,071 $ (31 ) Mortgage-backed securities 696,073 (17,851 ) 316,686 (17,143 ) 1,012,759 (34,994 ) Obligations of states and political subdivisions 454,072 (16,960 ) 250 (3 ) 454,322 (16,963 ) Total debt securities 1,154,216 (34,842 ) 316,936 (17,146 ) 1,471,152 (51,988 ) Equity securities — — — — — — Total temporarily impaired securities $ 1,154,216 $ (34,842 ) $ 316,936 $ (17,146 ) $ 1,471,152 $ (51,988 ) December 31, 2016 U.S. government corporations and agencies $ 4,185 $ (32 ) $ — $ — $ 4,185 $ (32 ) Mortgage-backed securities 744,202 (23,527 ) 272,449 (14,759 ) 1,016,651 (38,286 ) Obligations of states and political subdivisions 414,151 (19,309 ) 251 (3 ) 414,402 (19,312 ) Total debt securities 1,162,538 (42,868 ) 272,700 (14,762 ) 1,435,238 (57,630 ) Equity securities — — — — — — Total temporarily impaired securities $ 1,162,538 $ (42,868 ) $ 272,700 $ (14,762 ) $ 1,435,238 $ (57,630 ) 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 March 31, 2017 Obligations of states and political subdivisions 24,248 (752 ) 2,024 (243 ) 26,272 (995 ) Total temporarily impaired securities $ 24,248 $ (752 ) $ 2,024 $ (243 ) $ 26,272 $ (995 ) December 31, 2016 Obligations of states and political subdivisions 31,479 (884 ) 2,017 (261 ) 33,496 (1,145 ) Total temporarily impaired securities $ 31,479 $ (884 ) $ 2,017 $ (261 ) $ 33,496 $ (1,145 ) 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. 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. 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 March 31, 2017 . 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 March 31, 2017 . There were no gross realized gains and $85,000 of gross realized losses on the sale of available for sale securities with OTTI writedowns for the period ended March 31, 2016 . Additionally, there were no gross realized gains and $439,000 of gross realized losses on the sale of held to maturity securities with OTTI write-downs for the period ended March 31, 2016 . 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 2017 2016 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 — (7 ) Total changes to AOCI for non-credit related impairment — (127 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (127 ) Included in other securities at March 31, 2017 , and December 31, 2016 , were shares of stock in each Federal Home Loan Bank (the "FHLB") of Des Moines, Chicago, Dallas, San Francisco and Topeka, both at an amortized cost of $ 14.4 million . The Heartland banks are required to maintain FHLB stock as members of the various FHLBs as required by these institutions. These equity securities are "restricted" in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other marketable equity securities and their fair value approximates amortized cost. Heartland considers its FHLB stock as a long-term investment that provides access to competitive products and liquidity. Heartland evaluates impairment in these investments based on the ultimate recoverability of the par value and at March 31, 2017 , did not consider the investments to be other than temporarily impaired.

Loans

Loans	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans	LOANS Loans as of March 31, 2017 , and December 31, 2016 , were as follows, in thousands: March 31, 2017 December 31, 2016 Loans receivable held to maturity: Commercial $ 1,314,393 $ 1,287,265 Commercial real estate 2,535,355 2,538,582 Agricultural and agricultural real estate 481,125 489,318 Residential real estate 604,902 617,924 Consumer 427,962 420,613 Gross loans receivable held to maturity 5,363,737 5,353,702 Unearned discount (668 ) (699 ) Deferred loan fees (1,465 ) (1,284 ) Total net loans receivable held to maturity 5,361,604 5,351,719 Allowance for loan losses (54,999 ) (54,324 ) Loans receivable, net $ 5,306,605 $ 5,297,395 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 March 31, 2017 , Heartland had $2.6 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 18% 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 March 31, 2017 , and December 31, 2016 , 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 2017. 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 March 31, 2017 Commercial $ 1,763 $ 14,417 $ 16,180 $ 3,989 $ 1,310,404 $ 1,314,393 Commercial real estate 2,666 21,131 23,797 34,549 2,500,806 2,535,355 Agricultural and agricultural real estate 41 3,942 3,983 13,243 467,882 481,125 Residential real estate 496 1,687 2,183 26,978 577,924 604,902 Consumer 1,397 7,459 8,856 6,149 421,813 427,962 Total $ 6,363 $ 48,636 $ 54,999 $ 84,908 $ 5,278,829 $ 5,363,737 December 31, 2016 Commercial $ 1,318 $ 13,447 $ 14,765 $ 3,712 $ 1,283,553 $ 1,287,265 Commercial real estate 2,671 21,648 24,319 45,217 2,493,365 2,538,582 Agricultural and agricultural real estate 816 3,394 4,210 16,730 472,588 489,318 Residential real estate 497 1,766 2,263 25,726 592,198 617,924 Consumer 1,451 7,316 8,767 5,988 414,625 420,613 Total $ 6,753 $ 47,571 $ 54,324 $ 97,373 $ 5,256,329 $ 5,353,702 The following table presents nonaccrual loans, accruing loans past due 90 days or more and troubled debt restructured loans at March 31, 2017 , and December 31, 2016 , in thousands: March 31, 2017 December 31, 2016 Nonaccrual loans $ 61,789 $ 62,591 Nonaccrual troubled debt restructured loans 1,079 1,708 Total nonaccrual loans $ 62,868 $ 64,299 Accruing loans past due 90 days or more $ 872 $ 86 Performing troubled debt restructured loans $ 11,010 $ 10,380 The following tables provide information on troubled debt restructured loans that were modified during the three -month periods ended March 31, 2017 , and March 31, 2016 , dollars in thousands: Three Months Ended March 31, 2017 2016 Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Commercial — $ — $ — — $ — $ — Commercial real estate — — — — — — Total commercial and commercial real estate — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate 3 348 348 — — — Consumer — — — — — — Total 3 $ 348 $ 348 — $ — $ — 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 March 31, 2017 , there were no commitments to extend credit to any of the borrowers with an existing troubled debt restructuring. Heartland had no troubled debt restructured loans for which there was a payment default during the three -month periods ended March 31, 2017 , and March 31, 2016 , that had been modified during the twelve-month period prior to default: 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 March 31, 2017 , 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 March 31, 2017 , and December 31, 2016 , in thousands: Pass Nonpass Total March 31, 2017 Commercial $ 1,216,550 $ 97,843 $ 1,314,393 Commercial real estate 2,362,759 172,596 2,535,355 Total commercial and commercial real estate 3,579,309 270,439 3,849,748 Agricultural and agricultural real estate 415,716 65,409 481,125 Residential real estate 569,322 35,580 604,902 Consumer 416,515 11,447 427,962 Total gross loans receivable held to maturity $ 4,980,862 $ 382,875 $ 5,363,737 December 31, 2016 Commercial $ 1,187,557 $ 99,708 $ 1,287,265 Commercial real estate 2,379,632 158,950 2,538,582 Total commercial and commercial real estate 3,567,189 258,658 3,825,847 Agricultural and agricultural real estate 424,311 65,007 489,318 Residential real estate 584,626 33,298 617,924 Consumer 409,474 11,139 420,613 Total gross loans receivable held to maturity $ 4,985,600 $ 368,102 $ 5,353,702 The nonpass category in the table above is comprised of approximately 54% special mention loans and 46% substandard loans as of March 31, 2017 . The percent of nonpass loans on nonaccrual status as of March 31, 2017 , was 17% . As of December 31, 2016 , the nonpass category in the table above was comprised of approximately 47% special mention loans and 53% substandard loans. The percent of nonpass loans on nonaccrual status as of December 31, 2016 , was 17% . Loans delinquent 30 to 89 days as a percent of total loans were 0.44% at March 31, 2017 , compared to 0 .37% at December 31, 2016 . 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 March 31, 2017 , and December 31, 2016 , 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 March 31, 2017 Commercial $ 11,940 $ 2,421 $ 291 $ 14,652 $ 1,296,900 $ 2,841 $ 1,314,393 Commercial real estate 3,618 310 500 4,428 2,506,236 24,691 2,535,355 Total commercial and commercial real estate 15,558 2,731 791 19,080 3,803,136 27,532 3,849,748 Agricultural and agricultural real estate 347 — 61 408 469,918 10,799 481,125 Residential real estate 2,141 163 — 2,304 581,850 20,748 604,902 Consumer 2,014 746 20 2,780 421,393 3,789 427,962 Total gross loans receivable held to maturity $ 20,060 $ 3,640 $ 872 $ 24,572 $ 5,276,297 $ 62,868 $ 5,363,737 December 31, 2016 Commercial $ 1,127 $ 219 $ 77 $ 1,423 $ 1,281,241 $ 4,601 $ 1,287,265 Commercial real estate 886 3,929 — 4,815 2,513,069 20,698 2,538,582 Total commercial and commercial real estate 2,013 4,148 77 6,238 3,794,310 25,299 3,825,847 Agricultural and agricultural real estate 199 3,191 — 3,390 472,597 13,331 489,318 Residential real estate 4,986 846 — 5,832 590,626 21,466 617,924 Consumer 3,455 1,021 9 4,485 411,925 4,203 420,613 Total gross loans receivable held to maturity $ 10,653 $ 9,206 $ 86 $ 19,945 $ 5,269,458 $ 64,299 $ 5,353,702 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 March 31, 2017 , and December 31, 2016 ; the outstanding loan balances recorded on the consolidated balance sheets at March 31, 2017 , and December 31, 2016 ; any related allowance recorded for those loans as of March 31, 2017 , and December 31, 2016 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three months ended March 31, 2017 , and year ended December 31, 2016 ; and the interest income recognized on the impaired loans during the three -month period ended March 31, 2017 , and year ended December 31, 2016 , in thousands: Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year- to- Date Avg. Loan Balance Year- to- Date Interest Income Recognized March 31, 2017 Impaired loans with a related allowance: Commercial $ 2,841 $ 2,829 $ 1,763 $ 2,776 $ 137 Commercial real estate 12,423 12,423 2,666 13,635 4 Total commercial and commercial real estate 15,264 15,252 4,429 16,411 141 Agricultural and agricultural real estate 575 575 41 2,013 5 Residential real estate 2,464 2,464 496 3,103 10 Consumer 2,473 2,473 1,397 2,480 11 Total impaired loans with a related allowance $ 20,776 $ 20,764 $ 6,363 $ 24,007 $ 167 Impaired loans without a related allowance: Commercial $ 1,201 $ 1,160 $ — $ 1,650 $ 59 Commercial real estate 23,203 22,126 — 27,545 196 Total commercial and commercial real estate 24,404 23,286 — 29,195 255 Agricultural and agricultural real estate 12,668 12,668 — 13,512 35 Residential real estate 24,518 24,514 — 24,061 77 Consumer 3,676 3,676 — 3,755 19 Total impaired loans without a related allowance $ 65,266 $ 64,144 $ — $ 70,523 $ 386 Total impaired loans held to maturity: Commercial $ 4,042 $ 3,989 $ 1,763 $ 4,426 $ 196 Commercial real estate 35,626 34,549 2,666 41,180 200 Total commercial and commercial real estate 39,668 38,538 4,429 45,606 396 Agricultural and agricultural real estate 13,243 13,243 41 15,525 40 Residential real estate 26,982 26,978 496 27,164 87 Consumer 6,149 6,149 1,397 6,235 30 Total impaired loans held to maturity $ 86,042 $ 84,908 $ 6,363 $ 94,530 $ 553 Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year-to- Date Avg. Loan Balance Year-to- Date Interest Income Recognized December 31, 2016 Impaired loans with a related allowance: Commercial $ 2,852 $ 2,840 $ 1,318 $ 3,136 $ 2 Commercial real estate 14,221 14,221 2,671 10,625 21 Total commercial and commercial real estate 17,073 17,061 3,989 13,761 23 Agricultural and agricultural real estate 2,771 2,771 816 912 21 Residential real estate 3,490 3,490 497 3,371 43 Consumer 2,644 2,644 1,451 3,082 42 Total impaired loans with a related allowance $ 25,978 $ 25,966 $ 6,753 $ 21,126 $ 129 Impaired loans without a related allowance: Commercial $ 925 $ 872 $ — $ 5,329 $ 251 Commercial real estate 31,875 30,996 — 39,632 1,647 Total commercial and commercial real estate 32,800 31,868 — 44,961 1,898 Agricultural and agricultural real estate 13,959 13,959 — 12,722 157 Residential real estate 22,408 22,236 — 18,446 202 Consumer 3,344 3,344 — 2,659 68 Total impaired loans without a related allowance $ 72,511 $ 71,407 $ — $ 78,788 $ 2,325 Total impaired loans held to maturity: Commercial $ 3,777 $ 3,712 $ 1,318 $ 8,465 $ 253 Commercial real estate 46,096 45,217 2,671 50,257 1,668 Total commercial and commercial real estate 49,873 48,929 3,989 58,722 1,921 Agricultural and agricultural real estate 16,730 16,730 816 13,634 178 Residential real estate 25,898 25,726 497 21,817 245 Consumer 5,988 5,988 1,451 5,741 110 Total impaired loans held to maturity $ 98,489 $ 97,373 $ 6,753 $ 99,914 $ 2,454 On February 28, 2017, Heartland acquired Founders Bancorp, parent company of Founders Community Bank, based in San Luis Obispo, California. As of February 28, 2017, Founder Community Bank had gross loans of $98.9 million , and the estimated fair value of the loans acquired was $96.4 million . 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 gross loans of $ 594.9 million , and the estimated fair value of the loans acquired was $ 581.5 million . Heartland uses 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 March 31, 2017 , and December 31, 2016 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: March 31, 2017 December 31, 2016 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 1,962 $ 94,339 $ 96,301 $ 2,198 $ 99,082 $ 101,280 Commercial real estate 2,294 617,124 619,418 2,079 622,117 624,196 Agricultural and agricultural real estate — 1,339 1,339 — 181 181 Residential real estate 187 147,389 147,576 186 157,468 157,654 Consumer loans — 49,023 49,023 — 47,368 47,368 Total loans $ 4,443 $ 909,214 $ 913,657 $ 4,463 $ 926,216 $ 930,679 Changes in accretable yield on acquired loans with evidence of credit deterioration at the date of acquisition for the three -month periods ended March 31, 2017 , and March 31, 2016 , were as follows, in thousands: For the Three Months Ended March 31, 2017 March 31, 2016 Balance at beginning of year $ 182 $ 557 Original yield discount, net, at date of acquisitions — 19 Accretion (173 ) (273 ) Reclassification from nonaccretable difference (1) 127 2 Balance at end of period $ 136 $ 305 (1) Represents increased in estimated cash flows expected to be received, primarily due to lower estimated credit losses. For loans acquired since January 2015, 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 March 31, 2017 , 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 March 31, 2017 , and December 31, 2016, there was an allowance for loan losses of $ 589,000 and $588,000 , respectively, related to these ASC 310-30 loans. Provision expense of $ 1,000 and $124,000 was recorded for the three-month periods ended March 31, 2017, and 2016, respectively. For loans acquired since January 2015, on the acquisition dates the preliminary estimate of the contractually required payments receivable for all nonimpaired loans acquired in the acquisitions was $1.65 billion , and the estimated fair value of the loans was $1.60 billion .

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2017
Loans and Leases Receivable Disclosure [Abstract]
Allowance for Loan Losses	ALLOWANCE FOR LOAN LOSSES Changes in the allowance for loan losses for the three -month periods ended March 31, 2017 , and March 31, 2016 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2016 $ 14,765 $ 24,319 $ 4,210 $ 2,263 $ 8,767 $ 54,324 Charge-offs (230 ) (608 ) (871 ) (265 ) (1,744 ) (3,718 ) Recoveries 234 212 1 2 303 752 Provision 1,411 (126 ) 643 183 1,530 3,641 Balance at March 31, 2017 $ 16,180 $ 23,797 $ 3,983 $ 2,183 $ 8,856 $ 54,999 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 (98 ) (312 ) — (37 ) (1,158 ) (1,605 ) Recoveries 176 146 3 20 246 591 Provision 201 1,129 138 (66 ) 665 2,067 Balance at March 31, 2016 $ 16,374 $ 20,495 $ 4,028 $ 1,851 $ 6,990 $ 49,738 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	3 Months Ended
	Mar. 31, 2017
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 $ 141.5 million at March 31, 2017 , and $127.7 million at December 31, 2016 . 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 $13.8 million of goodwill in connection with the acquisition of Founders Bancorp, parent company of Founders Community Bank, based in San Luis Obispo, California on February 28, 2017. The goodwill associated with this transaction is not deductible for tax purposes. As part of this acquisition, Heartland recognized core deposit intangibles of $2.5 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 $ 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 . Goodwill related to the Founders Bancorp and CIC Bancshares, Inc. acquisitions resulted from expected operational synergies, increased market presence, cross-selling opportunities, and expanded business lines. Heartland's intangible assets consist of core deposit intangibles, mortgage servicing rights, customer relationship intangible, and commercial servicing rights. The gross carrying amount of these intangible assets and the associated accumulated amortization at March 31, 2017 , and December 31, 2016 , are presented in the table below, in thousands: March 31, 2017 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizing intangible assets: Core deposit intangibles $ 45,968 $ 22,211 $ 23,757 $ 43,504 $ 21,049 $ 22,455 Mortgage servicing rights 51,302 19,343 31,959 50,467 18,379 32,088 Customer relationship intangible 1,177 866 311 1,177 857 320 Commercial servicing rights 6,597 3,115 3,482 6,504 2,814 3,690 Total $ 105,044 $ 45,535 $ 59,509 $ 101,652 $ 43,099 $ 58,553 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 Nine months ending December 31, 2017 $ 3,577 $ 6,784 $ 30 $ 632 $ 11,023 Year ending December 31, 2018 4,261 6,294 39 789 11,383 2019 3,741 5,395 38 638 9,812 2020 3,264 4,496 37 476 8,273 2021 2,716 3,596 35 408 6,755 2022 1,876 2,697 34 323 4,930 Thereafter 4,322 2,697 98 216 7,333 Total $ 23,757 $ 31,959 $ 311 $ 3,482 $ 59,509 Projections of amortization expense for mortgage servicing rights are based on existing asset balances and the existing interest rate environment as of March 31, 2017 . Heartland's actual experience may be significantly different depending upon changes in mortgage interest rates and market conditions. Mortgage loans serviced for others were $4.34 billion and $ 4.31 billion as of March 31, 2017 , and December 31, 2016 , respectively. Custodial escrow balances maintained in connection with the mortgage loan servicing portfolio were approximately $27.3 million and $21.4 million as of March 31, 2017 , and December 31, 2016 , respectively. The fair value of Heartland's mortgage servicing rights was estimated at $47.6 million at March 31, 2017 , and $45.2 million at December 31, 2016 . 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 9.39% and 9.63% for the March 31, 2017 , and December 31, 2016 , valuations, respectively. The discount rate was 9.25% and 9.26% for the March 31, 2017 , and December 31, 2016 , valuations, respectively. The average capitalization rate for the first three months of 2017 ranged from 100 to 150 basis points compared to the range of 88 to 135 basis points for 2016 . Fees collected for the servicing of mortgage loans for others were $ 3.2 million and $ 2.9 million for the three months ended March 31, 2017 , and March 31, 2016 , respectively. The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the three months ended March 31, 2017 , and March 31, 2016 : 2017 2016 Balance at January 1, $ 32,088 $ 30,314 Originations 2,132 2,395 Amortization (2,261 ) (2,259 ) Balance at March 31, $ 31,959 $ 30,450 Fair value of mortgage servicing rights $ 47,564 $ 45,210 Mortgage servicing rights, net to servicing portfolio 0.74 % 0.74 % Heartland's 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 $160.7 million at March 31, 2017. 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 $415,000 and $80,000 for the three months ended March 31, 2017 , and March 31, 2016 , 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 was 6.72% to 8.07% as of March 31, 2017, compared to 6.96% to 7.88% as of December 31, 2016 . The discount rate range was 12.07% to 13.69% for the March 31, 2017 , valuations compared to 12.44% to 13.88% for the December 31, 2016 , valuations. The capitalization rate for 2017 ranged from 310 to 445 basis points compared to 310 to 445 basis points for 2016 . The total fair value of Heartland's commercial servicing rights was estimated at $4.0 million as of March 31, 2017 . The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the three months ended March 31, 2017 , and March 31, 2016 : 2017 2016 Balance at January 1, $ 3,690 $ 4,611 Purchased commercial servicing rights — 190 Originations 93 195 Amortization (306 ) (536 ) Valuation allowance on commercial servicing rights 5 — Balance at March 31, $ 3,482 $ 4,460 Fair value of commercial servicing rights $ 4,040 $ 4,899 Commercial servicing rights, net to servicing portfolio 2.17 % 2.35 % 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 March 31, 2017 , no valuation allowance was required on commercial servicing rights less than 20 years and a $28,000 valuation allowance was required on commercial servicing rights greater than 20 years. At December 31, 2016 , no valuation allowance was required on commercial servicing rights less than 20 years and a $33,000 valuation allowance was required on commercial servicing rights greater than 20 years. 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 March 31, 2017 , and December 31, 2016 : March 31, 2017 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 $ 17 $ 18 $ — $ 103 $ 114 $ — Premier Valley Bank 131 161 — 345 317 28 Wisconsin Bank & Trust 748 929 — 2,166 2,501 — Total $ 896 $ 1,108 $ — $ 2,614 $ 2,932 $ 28 December 31, 2016 Centennial Bank and Trust $ 19 $ 23 $ — $ 107 $ 114 $ — Premier Valley Bank 156 180 — 359 326 33 Wisconsin Bank & Trust 833 997 — 2,249 2,487 — Total $ 1,008 $ 1,200 $ — $ 2,715 $ 2,927 $ 33

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2017
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 $1.8 million and $2.2 million of cash as collateral at March 31, 2017 , and December 31, 2016 , respectively. Heartland's counterparties were required to pledge $0 at both March 31, 2017 and December 31, 2016 . 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 related to derivatives will be reclassified to interest expense as interest payments are received or made on Heartland's variable-rate liabilities. For the three months ended March 31, 2017 , 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 $397,000 . For the next twelve months, Heartland estimates that cash payments and reclassification from accumulated other comprehensive income to interest expense will total $ 1.6 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 was effective on March 1, 2017, and replaced the 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 March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity March 31, 2017 Interest rate swap $ 25,000 $ (346 ) Other liabilities 1.148 % 2.255 % 03/17/2021 Interest rate swap — — Other liabilities — % 3.220 % 03/01/2017 Interest rate swap 20,000 (996 ) Other liabilities 1.009 % 3.355 % 01/07/2020 Interest rate swap 10,000 (17 ) Other liabilities 1.153 % 1.674 % 03/26/2019 Interest rate swap 10,000 (16 ) Other liabilities 1.148 % 1.658 % 03/18/2019 Interest rate swap 36,667 633 Other assets 3.358 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (207 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap 20,000 (253 ) Other liabilities 1.055 % 2.352 % 03/01/2024 December 31, 2016 Interest rate swap $ 25,000 $ (447 ) Other liabilities 0.993 % 2.255 % 03/17/2021 Interest rate swap 20,000 (114 ) Other liabilities 0.931 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,145 ) Other liabilities 0.868 % 3.355 % 01/07/2020 Interest rate swap 10,000 (42 ) Other liabilities 0.997 % 1.674 % 03/26/2019 Interest rate swap 10,000 (41 ) Other liabilities 0.993 % 1.658 % 03/18/2019 Interest rate swap 37,667 530 Other assets 3.164 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (214 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (262 ) 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 -month periods ended March 31, 2017 , and March 31, 2016 , 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 March 31, 2017 Interest rate swaps $ 533 Interest expense $ (397 ) Other income $ — Three Months Ended March 31, 2016 Interest rate swaps $ (2,917 ) Interest expense $ (506 ) 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. Heartland was required to pledge $5.0 million of cash as collateral for these fair value hedges at both March 31, 2017 , and December 31, 2016. The table below identifies the notional amount, fair value and balance sheet category of Heartland's fair value hedges at March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Fair value hedges $ 36,144 $ (1,432 ) Other liabilities December 31, 2016 Fair value hedges $ 40,807 $ (1,626 ) Other liabilities The table below identifies the gains and losses recognized on Heartland's fair value hedges for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Fair value hedges $ 194 Interest income Three Months Ended March 31, 2016 Fair value hedges $ (1,222 ) Interest income Embedded Derivatives Heartland has fixed rate loans with embedded derivatives. 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 March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Embedded derivatives $ 14,418 $ 987 Other assets December 31, 2016 Embedded derivatives $ 14,549 $ 1,104 Other assets The table below identifies the gains and losses recognized on Heartland's embedded derivatives for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Embedded derivatives $ 117 Other noninterest income Three Months Ended March 31, 2016 Embedded derivatives $ 272 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 and at the discretion of the holder. 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 . At March 31, 2017, and December 31, 2016, the remaining shares to be issued upon conversion totaled 14,353 and 20,481 , respectively. 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 March 31, 2017 , and December 31, 2016: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Embedded conversion option $ 391 $ (325 ) Other liabilities December 31, 2016 Embedded conversion option $ 558 $ (422 ) Other liabilities The table below identifies the gains and losses recognized on Heartland's embedded conversion options for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Embedded conversion option $ 97 Other noninterest income Three Months Ended March 31, 2016 Embedded conversion option $ (100 ) Other noninterest income Back-To-Back Loan Swaps Heartland has 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 $ 997,000 and $1.8 million as of March 31, 2017 , and December 31, 2016 , respectively, as collateral related to these back-to-back swaps. Heartland's counterparties were required to pledge $768,000 at both March 31, 2017 , and December 31, 2016 . 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 months ended March 31, 2017 and March 31, 2016 , no gain or loss was recognized. The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as loan swaps at March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate March 31, 2017 Customer interest rate swaps $ 73,780 $ 1,658 Other assets 4.75 % 3.74 % Customer interest rate swaps 73,780 (1,658 ) Other liabilities 3.74 % 4.75 % December 31, 2016 Customer interest rate swaps $ 69,594 $ 1,588 Other assets 4.66 % 3.47 % Customer interest rate swaps 69,594 (1,588 ) Other liabilities 3.47 % 4.66 % 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 $30,000 at March 31, 2017 , and $0 at December 31, 2016 . Heartland's counterparties were required to pledge $8,000 and $2.9 million at March 31, 2017 , and December 31, 2016 , respectively, as collateral for these forward commitments. Heartland acquired undesignated interest rate swaps in 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 March 31, 2017 , and December 31, 2016 , in thousands: Balance Sheet Category Notional Amount Fair Value March 31, 2017 Interest rate lock commitments (mortgage) Other assets $ 92,528 $ 3,745 Forward commitments Other assets 48,392 176 Forward commitments Other liabilities 123,944 (634 ) Undesignated interest rate swaps Other liabilities 14,418 (987 ) December 31, 2016 Interest rate lock commitments (mortgage) Other assets $ 80,465 $ 2,790 Forward commitments Other assets 142,750 2,546 Forward commitments Other liabilities 59,276 (266 ) Undesignated interest rate swaps Other liabilities 15,564 (1,126 ) 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 -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended March 31, 2017 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 1,062 Forward commitments Net gains on sale of loans held for sale (2,739 ) Undesignated interest rate swaps Other noninterest income 117 Three Months Ended March 31, 2016 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 4,727 Forward commitments Net gains on sale of loans held for sale (1,489 ) Undesignated interest rate swaps Other noninterest income (316 )

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , and December 31, 2016 , 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 March 31, 2017 , and December 31, 2016 , 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 March 31, 2017 Assets Securities available for sale U.S. government corporations and agencies $ 15,067 $ 10,496 $ 4,571 $ — Mortgage-backed securities 1,288,527 — 1,288,527 — Obligations of states and political subdivisions 574,593 — 574,593 — Equity securities 15,341 — 15,341 — Derivative financial instruments (1) 3,278 — 3,278 — Interest rate lock commitments 3,745 — — 3,745 Forward commitments 176 — 176 — Total assets at fair value $ 1,900,727 $ 10,496 $ 1,886,486 $ 3,745 Liabilities Derivative financial instruments (2) $ 6,237 $ — $ 6,237 $ — Forward commitments 634 — 634 — Total liabilities at fair value $ 6,871 $ — $ 6,871 $ — December 31, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 4,700 $ 517 $ 4,183 $ — Mortgage-backed securities 1,290,500 — 1,288,276 2,224 Obligations of states and political subdivisions 536,144 — 536,144 — Equity securities 14,520 — 14,520 — Derivative financial instruments (1) 3,222 — 3,222 — Interest rate lock commitments 2,790 — — 2,790 Forward commitments 2,546 — 2,546 — Total assets at fair value $ 1,854,422 $ 517 $ 1,848,891 $ 5,014 Liabilities Derivative financial instruments (2) $ 7,027 $ — $ 7,027 $ — Forward commitments 266 — 266 — Total liabilities at fair value $ 7,293 $ — $ 7,293 $ — (1) Includes cash flow hedges, 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 March 31, 2017 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,216 $ — $ — $ 1,216 $ — Commercial real estate 1,490 — — 1,490 375 Agricultural and agricultural real estate 534 — — 534 — Residential real estate 2,097 — — 2,097 — Consumer 1,076 — — 1,076 — Total collateral dependent impaired loans $ 6,413 $ — $ — $ 6,413 $ 375 Other real estate owned $ 11,188 $ — $ — $ 11,188 $ 274 Premises, furniture and equipment held for sale $ 1,242 $ — $ 1,242 $ — Commercial servicing rights $ 317 $ — $ — $ 317 $ — Fair Value Measurements at December 31, 2016 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,683 $ — $ — $ 1,683 $ 41 Commercial real estate 3,026 — — 3,026 527 Agricultural and agricultural real estate 1,955 — — 1,955 — Residential real estate 3,565 — — 3,565 85 Consumer 1,193 — — 1,193 — Total collateral dependent impaired loans $ 11,422 $ — $ — — $ 11,422 $ 653 Other real estate owned $ 9,744 $ — $ — $ 9,744 $ 1,341 Premises, furniture and equipment held for sale $ 414 $ — $ — $ 414 $ 35 Commercial servicing rights $ 326 $ — $ — $ 326 $ 33 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 3/31/17 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ — Discounted cash flows Pretax discount rate — Actual defaults — Actual deferrals — Interest rate lock commitments 3,745 Discounted cash flows Closing ratio 0-99% (87%) (1) Premises, furniture and equipment held for sale 1,242 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Commercial servicing rights 317 Discounted cash flows Third party valuation (3) Other real estate owned 11,188 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% Collateral dependent impaired loans: Commercial 1,216 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Commercial real estate 1,490 Modified appraised value Third party appraisal (2) Appraisal discount 0-11% (4) Agricultural and agricultural real estate 534 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Residential real estate 2,097 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Consumer 1,076 Modified appraised value Third party valuation (2) Valuation discount 0-12% (4) (1) 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. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) 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. (4) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. Fair Value at 12/31/16 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ 2,224 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 21.77 - 37.62% (33.11%) Actual deferrals 10.44 - 26.29% (14.81%) Interest rate lock commitments 2,790 Discounted cash flows Closing ratio 0-99% (89%) (1) Premises, furniture and equipment held for sale 414 Modified appraised value Third party appraisal (2) 0-8% (4) Commercial servicing rights 326 Discounted cash flows Third party valuation (3) Other real estate owned 9,744 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% Collateral dependent impaired loans: Commercial 1,683 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Commercial real estate 3,026 Modified appraised value Third party appraisal (2) Appraisal discount 0-7% (4) Agricultural and agricultural real estate 1,955 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Residential real estate 3,565 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Consumer 1,193 Modified appraised value Third party valuation (2) Valuation discount 0-11% (4) (1) 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. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) 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. (4) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. The changes in fair value of the Z-TRANCHE securities, Level 3 assets that are measured on a recurring basis, are summarized in the following table, in thousands: For the Three Months Ended March 31, 2017 For the Year Ended December 31, 2016 Balance at January 1, $ 2,224 $ 2,039 Total gains (losses): Included in earnings 2,810 — Included in other comprehensive income (2,166 ) 185 Purchases, sales and settlements: Purchases — — Sales (2,868 ) — Settlements — — Balance at period end $ — $ 2,224 The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments measured on a recurring basis, are summarized in the following table, in thousands: For the Three Months Ended March 31, 2017 For the Year Ended December 31, 2016 Balance at January 1, $ 2,790 $ 3,168 Total gains (losses) included in earnings 1,062 (1,564 ) Issuances 382 5,373 Settlements (489 ) (4,187 ) Balance at period end $ 3,745 $ 2,790 Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments held at March 31, 2017 , and December 31, 2016 , were $3.7 million and $2.8 million , respectively. The tables below summarize the estimated fair value of Heartland's financial instruments as defined by ASC 825 as of March 31, 2017 , and December 31, 2016 , 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 $ 173,151 $ 173,151 $ 173,151 $ — $ — Time deposits in other financial institutions 41,539 41,539 41,539 — — Securities: Available for sale 1,893,528 1,893,528 10,496 1,883,032 — Held to maturity 260,616 272,797 — 272,797 — Other investments 21,557 21,557 — 21,362 195 Loans held for sale 49,009 49,009 — 49,009 — Loans, net: Commercial 1,297,723 1,271,354 — 1,270,138 1,216 Commercial real estate 2,510,614 2,514,151 — 2,512,661 1,490 Agricultural and agricultural real estate 477,867 479,134 — 478,600 534 Residential real estate 601,314 591,256 — 589,159 2,097 Consumer 419,087 421,627 — 420,551 1,076 Total Loans, net 5,306,605 5,277,522 — 5,271,109 6,413 Derivative financial instruments (1) 3,278 3,278 — 3,278 — Interest rate lock commitments 3,745 3,745 — — 3,745 Forward commitments 176 176 — 176 — Financial liabilities: Deposits Demand deposits 2,319,256 2,319,256 — 2,319,256 — Savings deposits 3,940,146 3,940,146 — 3,940,146 — Time deposits 830,459 830,459 — 830,459 — Short term borrowings 155,025 155,025 — 155,025 — Other borrowings 282,051 282,346 — 282,346 — Derivative financial instruments (2) 6,237 6,237 — 6,237 — Forward commitments 634 634 — 634 — (1) Includes cash flow hedges, 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 $ 158,724 $ 158,724 $ 158,724 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,845,864 1,845,864 517 1,843,123 2,224 Held to maturity 263,662 274,799 — 274,799 — Other investments 21,560 21,560 — 21,365 195 Loans held for sale 61,261 61,261 — 61,261 — Loans, net: Commercial 1,272,089 1,258,754 — 1,257,071 1,683 Commercial real estate 2,513,446 2,506,858 — 2,503,832 3,026 Agricultural and agricultural real estate 485,820 487,001 — 485,046 1,955 Residential real estate 614,207 604,233 — 600,668 3,565 Consumer 411,833 414,266 — 413,073 1,193 Total Loans, net 5,297,395 5,271,112 — 5,259,690 11,422 Derivative financial instruments (1) 3,222 3,222 — 3,222 — Interest rate lock commitments 2,790 2,790 — — 2,790 Forward commitments 2,546 2,546 — 2,546 — Financial liabilities: Deposits Demand deposits 2,202,036 2,202,036 — 2,202,036 — Savings deposits 3,788,089 3,788,089 — 3,788,089 — Time deposits 857,286 857,286 — 857,286 — Short term borrowings 306,459 306,459 — 306,459 — Other borrowings 288,534 288,534 — 288,534 — Derivative financial instruments (2) 7,027 7,027 — 7,027 — Forward commitments 266 266 — 266 — (1) Includes cash flow hedges, 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	3 Months Ended
	Mar. 31, 2017
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 -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Three Months Ended March 31, 2017 2016 Community Retail Total Community Retail Total Net interest income $ 72,183 $ 845 $ 73,028 $ 71,583 $ 1,124 $ 72,707 Provision for loan losses 3,641 — 3,641 2,067 — 2,067 Total noninterest income 19,034 6,859 25,893 18,537 11,041 29,578 Total noninterest expense 63,212 8,528 71,740 59,739 10,570 70,309 Income (loss) before taxes $ 24,364 $ (824 ) $ 23,540 $ 28,314 $ 1,595 $ 29,909 Average Loans, for the period $ 5,334,659 $ 30,995 $ 5,365,654 $ 5,296,191 $ 61,911 $ 5,358,102 Segment Assets, at period end $ 8,291,723 $ 70,122 $ 8,361,845 $ 8,141,960 $ 111,819 $ 8,253,779

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2017
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, 2016 , included in the Form 10-K of Heartland Financial USA, Inc. ("Heartland") filed with the Securities and Exchange Commission ("SEC") on March 1, 2017 . 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 March 31, 2017 , are not necessarily indicative of the results expected for the year ending December 31, 2017 .
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 March 31, 2017 , 507,226 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 new guidance does not apply to certain contracts within the scope of other ASC Topics, such as lease contracts, insurance contracts, financing arrangements, financial instruments, guarantees other than product or service warranties and nonmonetary exchanges between entities in the same line of business to facilitate sales to customers. Heartland intends to adopt the accounting standard in 2018, as required, which may require a change in the recognition of certain recurring revenue streams within trust and investment management fees; however, the adoption of these amendments are not expected to have a significant effect on 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) require equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplify 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 leases on-balance sheet and disclose key information about leasing arrangements. The new standard establishes a right-of-use model (ROU) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as financing or operating, with classification affecting the pattern and classification of expense recognition in the income statement. 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 leases certain properties and equipment under operating leases that will result in recognition of lease assets and lease liabilities on the consolidated balance sheets under the ASU; however the majority of Heartland's properties and equipment are owned, not leased. Heartland intends to adopt the accounting standard in 2019 as required. 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 adopted this ASU on January 1, 2017, as required, using a prospective transition method. The requirement to report the excess tax benefit or shortfall related to settlements of share-based payment awards in earnings as an increase or decrease to tax expense has been applied to settlements occurring on or after January 1, 2017, and the impact of applying that guidance reduced reported income tax expense by $888,000 . ASU 2016-09 also requires that all income tax-related cash flows resulting from share-based payments be reported as an operating activity in the consolidated statements of cash flow. Previously income tax benefits resulting from the settlement of a share-based payment award were reported as a reduction of operating cash flows and an increase to financing cash flows to the extent that those benefits exceeded the income tax benefits reported in earnings during period in which the share-based payment awards vested. Heartland elected to adopt the change in cash flow classification on a retrospective basis, which resulted in a $1.1 million increase to net cash from operating activities and a corresponding decrease to net cash from financing activities in the accompanying consolidated statement of cash flows for the three months ended March 31, 2016. Heartland has elected to account for forfeitures as they occur. 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. In January 2017, the FASB issued ASU 2017-4, "Intangibles - Goodwill and Other (Topic 350)." This amendment is to simplify the subsequent measurement of goodwill by eliminating step two from the goodwill impairment test. Instead, an entity will perform only step one of its quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and then recognizing the impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity will still have the option to perform a qualitative assessment for a reporting unit to determine if the quantitative step one impairment test is necessary. This amendment is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied prospectively. Early adoption is permitted, including in an interim period for impairment tests performed after January 1, 2017. Heartland intends to adopt this ASU in the third quarter of 2020, consistent with the annual impairment test as of September 30 each year, and is currently evaluating the potential impact of this guidance on its results of operations, financial position and liquidity. In March 2017, the FASB issued ASU 2017-08, "Receivables - Nonrefundable Fee and Other Costs (Subtopic 310-20)." These amendments shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount. Discounts continue to be amortized to maturity. These amendments are effective for public business entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. If any entity early adopts in an interim period, any adjustments should be reflected as to the beginning of the fiscal year that includes the interim period. The amendments should be applied on a modified retrospective basis, with a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Heartland intends to adopt this ASU in 2019, 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 March 31, 2017 , and December 31, 2016 , 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)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Amounts used in the determination of basic and diluted earnings per share for the three -month periods ended March 31, 2017 and 2016 , are shown in the table below: Three Months Ended (Dollars and number of shares in thousands, except per share data) 2017 2016 Net income attributable to Heartland $ 18,010 $ 20,009 Preferred dividends (19 ) (168 ) Interest expense on convertible preferred debt 5 — Net income available to common stockholders $ 17,996 $ 19,841 Weighted average common shares outstanding for basic earnings per share 26,335 23,657 Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units 293 460 Weighted average common shares for diluted earnings per share 26,628 24,117 Earnings per common share — basic $ 0.68 $ 0.84 Earnings per common share — diluted $ 0.68 $ 0.82 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation — 57
Summary of Status of RSUs	A summary of the RSUs outstanding as of March 31, 2017 and 2016 , and changes during the three months ended March 31, 2017 and 2016 , follows: 2017 2016 Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 346,817 $ 27.61 353,195 $ 25.53 Granted 92,267 47.50 119,718 29.05 Vested (103,897 ) 24.74 (83,982 ) 20.79 Forfeited (7,765 ) 31.03 (2,078 ) 27.17 Outstanding at March 31 327,422 $ 34.04 386,853 $ 27.53
Summary of Status of Stock Options	A summary of the stock options outstanding as of March 31, 2017 and 2016 , and changes during the three months ended March 31, 2017 and 2016 , follows: 2017 2016 Shares Weighted-Average Exercise Price Shares Weighted-Average Exercise Price Outstanding at January 1 26,400 $ 18.60 125,950 $ 24.08 Granted — — — — Exercised (5,500 ) 18.60 (19,750 ) 21.60 Forfeited — — (1,250 ) 21.60 Outstanding at March 31 20,900 $ 18.60 104,950 $ 24.58 Options exercisable at March 31 20,900 $ 18.60 104,950 $ 24.58

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , and December 31, 2016 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value March 31, 2017 U.S. government corporations and agencies $ 15,027 $ 71 $ (31 ) $ 15,067 Mortgage-backed securities 1,319,662 3,859 (34,994 ) 1,288,527 Obligations of states and political subdivisions 588,559 2,997 (16,963 ) 574,593 Total debt securities 1,923,248 6,927 (51,988 ) 1,878,187 Equity securities 15,209 132 — 15,341 Total $ 1,938,457 $ 7,059 $ (51,988 ) $ 1,893,528 December 31, 2016 U.S. government corporations and agencies $ 4,716 $ 16 $ (32 ) $ 4,700 Mortgage-backed securities 1,321,760 7,026 (38,286 ) 1,290,500 Obligations of states and political subdivisions 553,020 2,436 (19,312 ) 536,144 Total debt securities 1,879,496 9,478 (57,630 ) 1,831,344 Equity securities 14,451 69 — 14,520 Total $ 1,893,947 $ 9,547 $ (57,630 ) $ 1,845,864
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 March 31, 2017 , and December 31, 2016 , are summarized in the table below, in thousands: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value March 31, 2017 Obligations of states and political subdivisions 260,616 13,176 (995 ) 272,797 Total $ 260,616 $ 13,176 $ (995 ) $ 272,797 December 31, 2016 Obligations of states and political subdivisions 263,662 12,282 (1,145 ) 274,799 Total $ 263,662 $ 12,282 $ (1,145 ) $ 274,799
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities available for sale at March 31, 2017 , 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. March 31, 2017 Amortized Cost Estimated Fair Value Due in 1 year or less $ 380 $ 380 Due in 1 to 5 years 47,478 47,375 Due in 5 to 10 years 96,785 94,282 Due after 10 years 458,943 447,623 Total debt securities 603,586 589,660 Mortgage-backed securities 1,319,662 1,288,527 Equity securities 15,209 15,341 Total investment securities $ 1,938,457 $ 1,893,528 The amortized cost and estimated fair value of debt securities held to maturity at March 31, 2017 , 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. March 31, 2017 Amortized Cost Estimated Fair Value Due in 1 year or less $ 1,993 $ 2,022 Due in 1 to 5 years 19,307 20,246 Due in 5 to 10 years 89,388 92,873 Due after 10 years 149,928 157,656 Total investment securities $ 260,616 $ 272,797
Schedule of Realized Gross Gains (Losses)	Gross gains and losses realized related to the sales of securities available for sale for the three -month periods ended March 31, 2017 and 2016 , are summarized as follows, in thousands: Three Months Ended 2017 2016 Proceeds from sales $ 221,637 $ 303,448 Gross security gains 3,830 4,558 Gross security losses 1,339 682
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 March 31, 2017 , and December 31, 2016 . 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 March 31, 2016, and December 31, 2015 , respectively. Securities for which Heartland has taken credit-related other-than-temporary impairment ("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 March 31, 2017 U.S. government corporations and agencies $ 4,071 $ (31 ) $ — $ — $ 4,071 $ (31 ) Mortgage-backed securities 696,073 (17,851 ) 316,686 (17,143 ) 1,012,759 (34,994 ) Obligations of states and political subdivisions 454,072 (16,960 ) 250 (3 ) 454,322 (16,963 ) Total debt securities 1,154,216 (34,842 ) 316,936 (17,146 ) 1,471,152 (51,988 ) Equity securities — — — — — — Total temporarily impaired securities $ 1,154,216 $ (34,842 ) $ 316,936 $ (17,146 ) $ 1,471,152 $ (51,988 ) December 31, 2016 U.S. government corporations and agencies $ 4,185 $ (32 ) $ — $ — $ 4,185 $ (32 ) Mortgage-backed securities 744,202 (23,527 ) 272,449 (14,759 ) 1,016,651 (38,286 ) Obligations of states and political subdivisions 414,151 (19,309 ) 251 (3 ) 414,402 (19,312 ) Total debt securities 1,162,538 (42,868 ) 272,700 (14,762 ) 1,435,238 (57,630 ) Equity securities — — — — — — Total temporarily impaired securities $ 1,162,538 $ (42,868 ) $ 272,700 $ (14,762 ) $ 1,435,238 $ (57,630 )
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 March 31, 2017 Obligations of states and political subdivisions 24,248 (752 ) 2,024 (243 ) 26,272 (995 ) Total temporarily impaired securities $ 24,248 $ (752 ) $ 2,024 $ (243 ) $ 26,272 $ (995 ) December 31, 2016 Obligations of states and political subdivisions 31,479 (884 ) 2,017 (261 ) 33,496 (1,145 ) Total temporarily impaired securities $ 31,479 $ (884 ) $ 2,017 $ (261 ) $ 33,496 $ (1,145 )
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 2017 2016 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 — (7 ) Total changes to AOCI for non-credit related impairment — (127 ) Total OTTI losses (accretion) recorded on debt securities, net $ — $ (127 )

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Schedule of Loans and Leases	Loans as of March 31, 2017 , and December 31, 2016 , were as follows, in thousands: March 31, 2017 December 31, 2016 Loans receivable held to maturity: Commercial $ 1,314,393 $ 1,287,265 Commercial real estate 2,535,355 2,538,582 Agricultural and agricultural real estate 481,125 489,318 Residential real estate 604,902 617,924 Consumer 427,962 420,613 Gross loans receivable held to maturity 5,363,737 5,353,702 Unearned discount (668 ) (699 ) Deferred loan fees (1,465 ) (1,284 ) Total net loans receivable held to maturity 5,361,604 5,351,719 Allowance for loan losses (54,999 ) (54,324 ) Loans receivable, net $ 5,306,605 $ 5,297,395
Allowance for Loan and Lease Losses, Based on Impairment Methodology	The following table shows the balance in the allowance for loan losses at March 31, 2017 , and December 31, 2016 , 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 2017. 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 March 31, 2017 Commercial $ 1,763 $ 14,417 $ 16,180 $ 3,989 $ 1,310,404 $ 1,314,393 Commercial real estate 2,666 21,131 23,797 34,549 2,500,806 2,535,355 Agricultural and agricultural real estate 41 3,942 3,983 13,243 467,882 481,125 Residential real estate 496 1,687 2,183 26,978 577,924 604,902 Consumer 1,397 7,459 8,856 6,149 421,813 427,962 Total $ 6,363 $ 48,636 $ 54,999 $ 84,908 $ 5,278,829 $ 5,363,737 December 31, 2016 Commercial $ 1,318 $ 13,447 $ 14,765 $ 3,712 $ 1,283,553 $ 1,287,265 Commercial real estate 2,671 21,648 24,319 45,217 2,493,365 2,538,582 Agricultural and agricultural real estate 816 3,394 4,210 16,730 472,588 489,318 Residential real estate 497 1,766 2,263 25,726 592,198 617,924 Consumer 1,451 7,316 8,767 5,988 414,625 420,613 Total $ 6,753 $ 47,571 $ 54,324 $ 97,373 $ 5,256,329 $ 5,353,702
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 March 31, 2017 , and December 31, 2016 , in thousands: March 31, 2017 December 31, 2016 Nonaccrual loans $ 61,789 $ 62,591 Nonaccrual troubled debt restructured loans 1,079 1,708 Total nonaccrual loans $ 62,868 $ 64,299 Accruing loans past due 90 days or more $ 872 $ 86 Performing troubled debt restructured loans $ 11,010 $ 10,380
Troubled Debt Restructuring on Loans Modified	The following tables provide information on troubled debt restructured loans that were modified during the three -month periods ended March 31, 2017 , and March 31, 2016 , dollars in thousands: Three Months Ended March 31, 2017 2016 Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Number of Loans Pre- Modification Recorded Investment Post- Modification Recorded Investment Commercial — $ — $ — — $ — $ — Commercial real estate — — — — — — Total commercial and commercial real estate — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate 3 348 348 — — — Consumer — — — — — — Total 3 $ 348 $ 348 — $ — $ —
Financing Receivable Credit Quality Indicators	The following table presents loans by credit quality indicator at March 31, 2017 , and December 31, 2016 , in thousands: Pass Nonpass Total March 31, 2017 Commercial $ 1,216,550 $ 97,843 $ 1,314,393 Commercial real estate 2,362,759 172,596 2,535,355 Total commercial and commercial real estate 3,579,309 270,439 3,849,748 Agricultural and agricultural real estate 415,716 65,409 481,125 Residential real estate 569,322 35,580 604,902 Consumer 416,515 11,447 427,962 Total gross loans receivable held to maturity $ 4,980,862 $ 382,875 $ 5,363,737 December 31, 2016 Commercial $ 1,187,557 $ 99,708 $ 1,287,265 Commercial real estate 2,379,632 158,950 2,538,582 Total commercial and commercial real estate 3,567,189 258,658 3,825,847 Agricultural and agricultural real estate 424,311 65,007 489,318 Residential real estate 584,626 33,298 617,924 Consumer 409,474 11,139 420,613 Total gross loans receivable held to maturity $ 4,985,600 $ 368,102 $ 5,353,702
Past Due Financing Receivables	The following table sets forth information regarding Heartland's accruing and nonaccrual loans at March 31, 2017 , and December 31, 2016 , 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 March 31, 2017 Commercial $ 11,940 $ 2,421 $ 291 $ 14,652 $ 1,296,900 $ 2,841 $ 1,314,393 Commercial real estate 3,618 310 500 4,428 2,506,236 24,691 2,535,355 Total commercial and commercial real estate 15,558 2,731 791 19,080 3,803,136 27,532 3,849,748 Agricultural and agricultural real estate 347 — 61 408 469,918 10,799 481,125 Residential real estate 2,141 163 — 2,304 581,850 20,748 604,902 Consumer 2,014 746 20 2,780 421,393 3,789 427,962 Total gross loans receivable held to maturity $ 20,060 $ 3,640 $ 872 $ 24,572 $ 5,276,297 $ 62,868 $ 5,363,737 December 31, 2016 Commercial $ 1,127 $ 219 $ 77 $ 1,423 $ 1,281,241 $ 4,601 $ 1,287,265 Commercial real estate 886 3,929 — 4,815 2,513,069 20,698 2,538,582 Total commercial and commercial real estate 2,013 4,148 77 6,238 3,794,310 25,299 3,825,847 Agricultural and agricultural real estate 199 3,191 — 3,390 472,597 13,331 489,318 Residential real estate 4,986 846 — 5,832 590,626 21,466 617,924 Consumer 3,455 1,021 9 4,485 411,925 4,203 420,613 Total gross loans receivable held to maturity $ 10,653 $ 9,206 $ 86 $ 19,945 $ 5,269,458 $ 64,299 $ 5,353,702
Summary of Impaired Loans	The following tables present, by category of loan, impaired loans, the unpaid contractual loan balances at March 31, 2017 , and December 31, 2016 ; the outstanding loan balances recorded on the consolidated balance sheets at March 31, 2017 , and December 31, 2016 ; any related allowance recorded for those loans as of March 31, 2017 , and December 31, 2016 ; the average outstanding loan balances recorded on the consolidated balance sheets during the three months ended March 31, 2017 , and year ended December 31, 2016 ; and the interest income recognized on the impaired loans during the three -month period ended March 31, 2017 , and year ended December 31, 2016 , in thousands: Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year- to- Date Avg. Loan Balance Year- to- Date Interest Income Recognized March 31, 2017 Impaired loans with a related allowance: Commercial $ 2,841 $ 2,829 $ 1,763 $ 2,776 $ 137 Commercial real estate 12,423 12,423 2,666 13,635 4 Total commercial and commercial real estate 15,264 15,252 4,429 16,411 141 Agricultural and agricultural real estate 575 575 41 2,013 5 Residential real estate 2,464 2,464 496 3,103 10 Consumer 2,473 2,473 1,397 2,480 11 Total impaired loans with a related allowance $ 20,776 $ 20,764 $ 6,363 $ 24,007 $ 167 Impaired loans without a related allowance: Commercial $ 1,201 $ 1,160 $ — $ 1,650 $ 59 Commercial real estate 23,203 22,126 — 27,545 196 Total commercial and commercial real estate 24,404 23,286 — 29,195 255 Agricultural and agricultural real estate 12,668 12,668 — 13,512 35 Residential real estate 24,518 24,514 — 24,061 77 Consumer 3,676 3,676 — 3,755 19 Total impaired loans without a related allowance $ 65,266 $ 64,144 $ — $ 70,523 $ 386 Total impaired loans held to maturity: Commercial $ 4,042 $ 3,989 $ 1,763 $ 4,426 $ 196 Commercial real estate 35,626 34,549 2,666 41,180 200 Total commercial and commercial real estate 39,668 38,538 4,429 45,606 396 Agricultural and agricultural real estate 13,243 13,243 41 15,525 40 Residential real estate 26,982 26,978 496 27,164 87 Consumer 6,149 6,149 1,397 6,235 30 Total impaired loans held to maturity $ 86,042 $ 84,908 $ 6,363 $ 94,530 $ 553 Unpaid Contractual Balance Loan Balance Related Allowance Recorded Year-to- Date Avg. Loan Balance Year-to- Date Interest Income Recognized December 31, 2016 Impaired loans with a related allowance: Commercial $ 2,852 $ 2,840 $ 1,318 $ 3,136 $ 2 Commercial real estate 14,221 14,221 2,671 10,625 21 Total commercial and commercial real estate 17,073 17,061 3,989 13,761 23 Agricultural and agricultural real estate 2,771 2,771 816 912 21 Residential real estate 3,490 3,490 497 3,371 43 Consumer 2,644 2,644 1,451 3,082 42 Total impaired loans with a related allowance $ 25,978 $ 25,966 $ 6,753 $ 21,126 $ 129 Impaired loans without a related allowance: Commercial $ 925 $ 872 $ — $ 5,329 $ 251 Commercial real estate 31,875 30,996 — 39,632 1,647 Total commercial and commercial real estate 32,800 31,868 — 44,961 1,898 Agricultural and agricultural real estate 13,959 13,959 — 12,722 157 Residential real estate 22,408 22,236 — 18,446 202 Consumer 3,344 3,344 — 2,659 68 Total impaired loans without a related allowance $ 72,511 $ 71,407 $ — $ 78,788 $ 2,325 Total impaired loans held to maturity: Commercial $ 3,777 $ 3,712 $ 1,318 $ 8,465 $ 253 Commercial real estate 46,096 45,217 2,671 50,257 1,668 Total commercial and commercial real estate 49,873 48,929 3,989 58,722 1,921 Agricultural and agricultural real estate 16,730 16,730 816 13,634 178 Residential real estate 25,898 25,726 497 21,817 245 Consumer 5,988 5,988 1,451 5,741 110 Total impaired loans held to maturity $ 98,489 $ 97,373 $ 6,753 $ 99,914 $ 2,454
Summary of Purchased Impaired and Nonimpaired Loans	The carrying amount of the acquired loans at March 31, 2017 , and December 31, 2016 , consisted of purchased impaired and nonimpaired loans as summarized in the following table, in thousands: March 31, 2017 December 31, 2016 Impaired Non Impaired Total Loans Impaired Non Impaired Total Loans Commercial $ 1,962 $ 94,339 $ 96,301 $ 2,198 $ 99,082 $ 101,280 Commercial real estate 2,294 617,124 619,418 2,079 622,117 624,196 Agricultural and agricultural real estate — 1,339 1,339 — 181 181 Residential real estate 187 147,389 147,576 186 157,468 157,654 Consumer loans — 49,023 49,023 — 47,368 47,368 Total loans $ 4,443 $ 909,214 $ 913,657 $ 4,463 $ 926,216 $ 930,679
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 -month periods ended March 31, 2017 , and March 31, 2016 , were as follows, in thousands: For the Three Months Ended March 31, 2017 March 31, 2016 Balance at beginning of year $ 182 $ 557 Original yield discount, net, at date of acquisitions — 19 Accretion (173 ) (273 ) Reclassification from nonaccretable difference (1) 127 2 Balance at end of period $ 136 $ 305 (1) Represents increased 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)	3 Months Ended
	Mar. 31, 2017
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 -month periods ended March 31, 2017 , and March 31, 2016 , were as follows, in thousands: Commercial Commercial Real Estate Agricultural Residential Real Estate Consumer Total Balance at December 31, 2016 $ 14,765 $ 24,319 $ 4,210 $ 2,263 $ 8,767 $ 54,324 Charge-offs (230 ) (608 ) (871 ) (265 ) (1,744 ) (3,718 ) Recoveries 234 212 1 2 303 752 Provision 1,411 (126 ) 643 183 1,530 3,641 Balance at March 31, 2017 $ 16,180 $ 23,797 $ 3,983 $ 2,183 $ 8,856 $ 54,999 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 (98 ) (312 ) — (37 ) (1,158 ) (1,605 ) Recoveries 176 146 3 20 246 591 Provision 201 1,129 138 (66 ) 665 2,067 Balance at March 31, 2016 $ 16,374 $ 20,495 $ 4,028 $ 1,851 $ 6,990 $ 49,738

Goodwill, Core Deposit Premiu24

Goodwill, Core Deposit Premium and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets	The gross carrying amount of these intangible assets and the associated accumulated amortization at March 31, 2017 , and December 31, 2016 , are presented in the table below, in thousands: March 31, 2017 December 31, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizing intangible assets: Core deposit intangibles $ 45,968 $ 22,211 $ 23,757 $ 43,504 $ 21,049 $ 22,455 Mortgage servicing rights 51,302 19,343 31,959 50,467 18,379 32,088 Customer relationship intangible 1,177 866 311 1,177 857 320 Commercial servicing rights 6,597 3,115 3,482 6,504 2,814 3,690 Total $ 105,044 $ 45,535 $ 59,509 $ 101,652 $ 43,099 $ 58,553
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 Nine months ending December 31, 2017 $ 3,577 $ 6,784 $ 30 $ 632 $ 11,023 Year ending December 31, 2018 4,261 6,294 39 789 11,383 2019 3,741 5,395 38 638 9,812 2020 3,264 4,496 37 476 8,273 2021 2,716 3,596 35 408 6,755 2022 1,876 2,697 34 323 4,930 Thereafter 4,322 2,697 98 216 7,333 Total $ 23,757 $ 31,959 $ 311 $ 3,482 $ 59,509
Summary of Changes in Servicing Rights	The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the three months ended March 31, 2017 , and March 31, 2016 : 2017 2016 Balance at January 1, $ 3,690 $ 4,611 Purchased commercial servicing rights — 190 Originations 93 195 Amortization (306 ) (536 ) Valuation allowance on commercial servicing rights 5 — Balance at March 31, $ 3,482 $ 4,460 Fair value of commercial servicing rights $ 4,040 $ 4,899 Commercial servicing rights, net to servicing portfolio 2.17 % 2.35 % The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the three months ended March 31, 2017 , and March 31, 2016 : 2017 2016 Balance at January 1, $ 32,088 $ 30,314 Originations 2,132 2,395 Amortization (2,261 ) (2,259 ) Balance at March 31, $ 31,959 $ 30,450 Fair value of mortgage servicing rights $ 47,564 $ 45,210 Mortgage servicing rights, net to servicing portfolio 0.74 % 0.74 %
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 March 31, 2017 , and December 31, 2016 : March 31, 2017 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 $ 17 $ 18 $ — $ 103 $ 114 $ — Premier Valley Bank 131 161 — 345 317 28 Wisconsin Bank & Trust 748 929 — 2,166 2,501 — Total $ 896 $ 1,108 $ — $ 2,614 $ 2,932 $ 28 December 31, 2016 Centennial Bank and Trust $ 19 $ 23 $ — $ 107 $ 114 $ — Premier Valley Bank 156 180 — 359 326 33 Wisconsin Bank & Trust 833 997 — 2,249 2,487 — Total $ 1,008 $ 1,200 $ — $ 2,715 $ 2,927 $ 33

Derivative Financial Instrume25

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Balance Sheet Category and Fair Values of Derivative Instruments	The table below identifies the notional amount, fair value and balance sheet category of Heartland's fair value hedges at March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Fair value hedges $ 36,144 $ (1,432 ) Other liabilities December 31, 2016 Fair value hedges $ 40,807 $ (1,626 ) Other liabilities The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as loan swaps at March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category Weighted Average Receive Rate Weighted Average Pay Rate March 31, 2017 Customer interest rate swaps $ 73,780 $ 1,658 Other assets 4.75 % 3.74 % Customer interest rate swaps 73,780 (1,658 ) Other liabilities 3.74 % 4.75 % December 31, 2016 Customer interest rate swaps $ 69,594 $ 1,588 Other assets 4.66 % 3.47 % Customer interest rate swaps 69,594 (1,588 ) Other liabilities 3.47 % 4.66 % The table below identifies the balance sheet category and fair values of Heartland's derivative instruments designated as cash flow hedges at March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category Receive Rate Weighted Average Pay Rate Maturity March 31, 2017 Interest rate swap $ 25,000 $ (346 ) Other liabilities 1.148 % 2.255 % 03/17/2021 Interest rate swap — — Other liabilities — % 3.220 % 03/01/2017 Interest rate swap 20,000 (996 ) Other liabilities 1.009 % 3.355 % 01/07/2020 Interest rate swap 10,000 (17 ) Other liabilities 1.153 % 1.674 % 03/26/2019 Interest rate swap 10,000 (16 ) Other liabilities 1.148 % 1.658 % 03/18/2019 Interest rate swap 36,667 633 Other assets 3.358 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (207 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap 20,000 (253 ) Other liabilities 1.055 % 2.352 % 03/01/2024 December 31, 2016 Interest rate swap $ 25,000 $ (447 ) Other liabilities 0.993 % 2.255 % 03/17/2021 Interest rate swap 20,000 (114 ) Other liabilities 0.931 % 3.220 % 03/01/2017 Interest rate swap 20,000 (1,145 ) Other liabilities 0.868 % 3.355 % 01/07/2020 Interest rate swap 10,000 (42 ) Other liabilities 0.997 % 1.674 % 03/26/2019 Interest rate swap 10,000 (41 ) Other liabilities 0.993 % 1.658 % 03/18/2019 Interest rate swap 37,667 530 Other assets 3.164 % 3.674 % 05/10/2021 Interest rate swap (1) 20,000 (214 ) Other liabilities — % 2.390 % 06/15/2024 Interest rate swap (2) 20,000 (262 ) 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.
Gains (Losses) on Derivative Instruments	The table below identifies the gains and losses recognized on Heartland's fair value hedges for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Fair value hedges $ 194 Interest income Three Months Ended March 31, 2016 Fair value hedges $ (1,222 ) Interest income The table below identifies the gains and losses recognized on Heartland's derivative instruments designated as cash flow hedges for the three -month periods ended March 31, 2017 , and March 31, 2016 , 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 March 31, 2017 Interest rate swaps $ 533 Interest expense $ (397 ) Other income $ — Three Months Ended March 31, 2016 Interest rate swaps $ (2,917 ) Interest expense $ (506 ) 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 March 31, 2017 , and December 31, 2016 , in thousands: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Embedded derivatives $ 14,418 $ 987 Other assets December 31, 2016 Embedded derivatives $ 14,549 $ 1,104 Other assets The table below identifies the gains and losses recognized on Heartland's embedded derivatives for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Embedded derivatives $ 117 Other noninterest income Three Months Ended March 31, 2016 Embedded derivatives $ 272 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 March 31, 2017 , and December 31, 2016: Notional Amount Fair Value Balance Sheet Category March 31, 2017 Embedded conversion option $ 391 $ (325 ) Other liabilities December 31, 2016 Embedded conversion option $ 558 $ (422 ) Other liabilities The table below identifies the gains and losses recognized on Heartland's embedded conversion options for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended March 31, 2017 Embedded conversion option $ 97 Other noninterest income Three Months Ended March 31, 2016 Embedded conversion option $ (100 ) Other noninterest income
Schedule of Other Derivatives Not Designated as Hedging Instruments, Balance Sheet and Income Category	The table below identifies the balance sheet category and fair values of Heartland's other free standing derivative instruments not designated as hedging instruments at March 31, 2017 , and December 31, 2016 , in thousands: Balance Sheet Category Notional Amount Fair Value March 31, 2017 Interest rate lock commitments (mortgage) Other assets $ 92,528 $ 3,745 Forward commitments Other assets 48,392 176 Forward commitments Other liabilities 123,944 (634 ) Undesignated interest rate swaps Other liabilities 14,418 (987 ) December 31, 2016 Interest rate lock commitments (mortgage) Other assets $ 80,465 $ 2,790 Forward commitments Other assets 142,750 2,546 Forward commitments Other liabilities 59,276 (266 ) Undesignated interest rate swaps Other liabilities 15,564 (1,126 ) 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 -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended March 31, 2017 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 1,062 Forward commitments Net gains on sale of loans held for sale (2,739 ) Undesignated interest rate swaps Other noninterest income 117 Three Months Ended March 31, 2016 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 4,727 Forward commitments Net gains on sale of loans held for sale (1,489 ) Undesignated interest rate swaps Other noninterest income (316 )

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 , and December 31, 2016 , 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 March 31, 2017 Assets Securities available for sale U.S. government corporations and agencies $ 15,067 $ 10,496 $ 4,571 $ — Mortgage-backed securities 1,288,527 — 1,288,527 — Obligations of states and political subdivisions 574,593 — 574,593 — Equity securities 15,341 — 15,341 — Derivative financial instruments (1) 3,278 — 3,278 — Interest rate lock commitments 3,745 — — 3,745 Forward commitments 176 — 176 — Total assets at fair value $ 1,900,727 $ 10,496 $ 1,886,486 $ 3,745 Liabilities Derivative financial instruments (2) $ 6,237 $ — $ 6,237 $ — Forward commitments 634 — 634 — Total liabilities at fair value $ 6,871 $ — $ 6,871 $ — December 31, 2016 Assets Securities available for sale U.S. government corporations and agencies $ 4,700 $ 517 $ 4,183 $ — Mortgage-backed securities 1,290,500 — 1,288,276 2,224 Obligations of states and political subdivisions 536,144 — 536,144 — Equity securities 14,520 — 14,520 — Derivative financial instruments (1) 3,222 — 3,222 — Interest rate lock commitments 2,790 — — 2,790 Forward commitments 2,546 — 2,546 — Total assets at fair value $ 1,854,422 $ 517 $ 1,848,891 $ 5,014 Liabilities Derivative financial instruments (2) $ 7,027 $ — $ 7,027 $ — Forward commitments 266 — 266 — Total liabilities at fair value $ 7,293 $ — $ 7,293 $ — (1) Includes cash flow hedges, 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 March 31, 2017 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,216 $ — $ — $ 1,216 $ — Commercial real estate 1,490 — — 1,490 375 Agricultural and agricultural real estate 534 — — 534 — Residential real estate 2,097 — — 2,097 — Consumer 1,076 — — 1,076 — Total collateral dependent impaired loans $ 6,413 $ — $ — $ 6,413 $ 375 Other real estate owned $ 11,188 $ — $ — $ 11,188 $ 274 Premises, furniture and equipment held for sale $ 1,242 $ — $ 1,242 $ — Commercial servicing rights $ 317 $ — $ — $ 317 $ — Fair Value Measurements at December 31, 2016 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Year-to- Date Losses Collateral dependent impaired loans: Commercial $ 1,683 $ — $ — $ 1,683 $ 41 Commercial real estate 3,026 — — 3,026 527 Agricultural and agricultural real estate 1,955 — — 1,955 — Residential real estate 3,565 — — 3,565 85 Consumer 1,193 — — 1,193 — Total collateral dependent impaired loans $ 11,422 $ — $ — — $ 11,422 $ 653 Other real estate owned $ 9,744 $ — $ — $ 9,744 $ 1,341 Premises, furniture and equipment held for sale $ 414 $ — $ — $ 414 $ 35 Commercial servicing rights $ 326 $ — $ — $ 326 $ 33
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 3/31/17 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ — Discounted cash flows Pretax discount rate — Actual defaults — Actual deferrals — Interest rate lock commitments 3,745 Discounted cash flows Closing ratio 0-99% (87%) (1) Premises, furniture and equipment held for sale 1,242 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Commercial servicing rights 317 Discounted cash flows Third party valuation (3) Other real estate owned 11,188 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% Collateral dependent impaired loans: Commercial 1,216 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Commercial real estate 1,490 Modified appraised value Third party appraisal (2) Appraisal discount 0-11% (4) Agricultural and agricultural real estate 534 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Residential real estate 2,097 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Consumer 1,076 Modified appraised value Third party valuation (2) Valuation discount 0-12% (4) (1) 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. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) 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. (4) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. Fair Value at 12/31/16 Valuation Technique Unobservable Input Range (Weighted Average) Z-TRANCHE Securities $ 2,224 Discounted cash flows Pretax discount rate 7.50 - 9.50% Actual defaults 21.77 - 37.62% (33.11%) Actual deferrals 10.44 - 26.29% (14.81%) Interest rate lock commitments 2,790 Discounted cash flows Closing ratio 0-99% (89%) (1) Premises, furniture and equipment held for sale 414 Modified appraised value Third party appraisal (2) 0-8% (4) Commercial servicing rights 326 Discounted cash flows Third party valuation (3) Other real estate owned 9,744 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% Collateral dependent impaired loans: Commercial 1,683 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Commercial real estate 3,026 Modified appraised value Third party appraisal (2) Appraisal discount 0-7% (4) Agricultural and agricultural real estate 1,955 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (4) Residential real estate 3,565 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (4) Consumer 1,193 Modified appraised value Third party valuation (2) Valuation discount 0-11% (4) (1) 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. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) 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. (4) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The changes in fair value of the Z-TRANCHE securities, Level 3 assets that are measured on a recurring basis, are summarized in the following table, in thousands: For the Three Months Ended March 31, 2017 For the Year Ended December 31, 2016 Balance at January 1, $ 2,224 $ 2,039 Total gains (losses): Included in earnings 2,810 — Included in other comprehensive income (2,166 ) 185 Purchases, sales and settlements: Purchases — — Sales (2,868 ) — Settlements — — Balance at period end $ — $ 2,224 The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments measured on a recurring basis, are summarized in the following table, in thousands: For the Three Months Ended March 31, 2017 For the Year Ended December 31, 2016 Balance at January 1, $ 2,790 $ 3,168 Total gains (losses) included in earnings 1,062 (1,564 ) Issuances 382 5,373 Settlements (489 ) (4,187 ) Balance at period end $ 3,745 $ 2,790
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 $ 173,151 $ 173,151 $ 173,151 $ — $ — Time deposits in other financial institutions 41,539 41,539 41,539 — — Securities: Available for sale 1,893,528 1,893,528 10,496 1,883,032 — Held to maturity 260,616 272,797 — 272,797 — Other investments 21,557 21,557 — 21,362 195 Loans held for sale 49,009 49,009 — 49,009 — Loans, net: Commercial 1,297,723 1,271,354 — 1,270,138 1,216 Commercial real estate 2,510,614 2,514,151 — 2,512,661 1,490 Agricultural and agricultural real estate 477,867 479,134 — 478,600 534 Residential real estate 601,314 591,256 — 589,159 2,097 Consumer 419,087 421,627 — 420,551 1,076 Total Loans, net 5,306,605 5,277,522 — 5,271,109 6,413 Derivative financial instruments (1) 3,278 3,278 — 3,278 — Interest rate lock commitments 3,745 3,745 — — 3,745 Forward commitments 176 176 — 176 — Financial liabilities: Deposits Demand deposits 2,319,256 2,319,256 — 2,319,256 — Savings deposits 3,940,146 3,940,146 — 3,940,146 — Time deposits 830,459 830,459 — 830,459 — Short term borrowings 155,025 155,025 — 155,025 — Other borrowings 282,051 282,346 — 282,346 — Derivative financial instruments (2) 6,237 6,237 — 6,237 — Forward commitments 634 634 — 634 — (1) Includes cash flow hedges, 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 $ 158,724 $ 158,724 $ 158,724 $ — $ — Time deposits in other financial institutions 2,105 2,105 2,105 — — Securities: Available for sale 1,845,864 1,845,864 517 1,843,123 2,224 Held to maturity 263,662 274,799 — 274,799 — Other investments 21,560 21,560 — 21,365 195 Loans held for sale 61,261 61,261 — 61,261 — Loans, net: Commercial 1,272,089 1,258,754 — 1,257,071 1,683 Commercial real estate 2,513,446 2,506,858 — 2,503,832 3,026 Agricultural and agricultural real estate 485,820 487,001 — 485,046 1,955 Residential real estate 614,207 604,233 — 600,668 3,565 Consumer 411,833 414,266 — 413,073 1,193 Total Loans, net 5,297,395 5,271,112 — 5,259,690 11,422 Derivative financial instruments (1) 3,222 3,222 — 3,222 — Interest rate lock commitments 2,790 2,790 — — 2,790 Forward commitments 2,546 2,546 — 2,546 — Financial liabilities: Deposits Demand deposits 2,202,036 2,202,036 — 2,202,036 — Savings deposits 3,788,089 3,788,089 — 3,788,089 — Time deposits 857,286 857,286 — 857,286 — Short term borrowings 306,459 306,459 — 306,459 — Other borrowings 288,534 288,534 — 288,534 — Derivative financial instruments (2) 7,027 7,027 — 7,027 — Forward commitments 266 266 — 266 — (1) Includes cash flow hedges, 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)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting	The following tables present financial information from Heartland's operating segments for the three -month periods ended March 31, 2017 , and March 31, 2016 , in thousands: Three Months Ended March 31, 2017 2016 Community Retail Total Community Retail Total Net interest income $ 72,183 $ 845 $ 73,028 $ 71,583 $ 1,124 $ 72,707 Provision for loan losses 3,641 — 3,641 2,067 — 2,067 Total noninterest income 19,034 6,859 25,893 18,537 11,041 29,578 Total noninterest expense 63,212 8,528 71,740 59,739 10,570 70,309 Income (loss) before taxes $ 24,364 $ (824 ) $ 23,540 $ 28,314 $ 1,595 $ 29,909 Average Loans, for the period $ 5,334,659 $ 30,995 $ 5,365,654 $ 5,296,191 $ 61,911 $ 5,358,102 Segment Assets, at period end $ 8,291,723 $ 70,122 $ 8,361,845 $ 8,141,960 $ 111,819 $ 8,253,779

Basis of Presentation (Earnings

Basis of Presentation (Earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share
Net income attributable to Heartland	$ 18,010	$ 20,009
Preferred dividends	(19)	(168)
Interest expense on convertible preferred debt	5	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 17,996	$ 19,841
Weighted average common shares outstanding for basic earnings per share (in shares)	26,335	23,657
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units (in shares)	293	460
Weighted average common shares for diluted earnings per share (shares)	26,628	24,117
Earnings per common share — basic (in dollars per share)	$ 0.68	$ 0.84
Earnings per common share — diluted (in dollars per share)	$ 0.68	$ 0.82
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation (in shares)	0	57

Basis of Presentation (Stock-ba

Basis of Presentation (Stock-based compensation) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit from equity based awards	$ 888,000	$ 1,100,000
Options granted (in shares)	0	0
Vested options (in shares)	20,900	104,950
Vested options, weighted average exercise price (in dollars per share)	$ 18.60	$ 24.58
Vested options, weighted average remaining contractual life	9 months 25 days
Intrinsic value for vested options	$ 655,000
Intrinsic value for the total of all options exercised	$ 161,000
Maximum exercise period	10 years
Cash received from options exercised	$ 102,000	$ 427,000
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	$ 1,700,000	$ 1,100,000
Share-based unrecognized compensation costs	5,400,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs	0	$ 0
Share-based unrecognized compensation costs	$ 0
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)	507,226
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)	55,665	72,644
Share-based compensation, award vesting periods	3 years	3 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)	27,570	35,516
Share-based compensation, award vesting periods	2 years	2 years
Long-Term Incentive Plan 2012 | Performance-Based RSUs | Share-based Compensation Award, Performance Period Ended December 31, 2019 and December 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	9,032	11,408
Share-based compensation, award vesting periods	3 years	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)	0	150

Basis of Presentation (Summary

Basis of Presentation (Summary of RSUs activity) (Details) - RSUs - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares
Outstanding at beginning of period (in shares)	346,817	353,195
Granted (in shares)	92,267	119,718
Vested (in shares)	(103,897)	(83,982)
Forfeited (in shares)	(7,765)	(2,078)
Outstanding at end of period (in shares)	327,422	386,853
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 27.61	$ 25.53
Granted (in dollars per share)	47.50	29.05
Vested (in dollars per share)	24.74	20.79
Forfeited (in dollars per share)	31.03	27.17
Outstanding at end of period (in dollars per share)	$ 34.04	$ 27.53

Basis of Presentation (Summar31

Basis of Presentation (Summary of stock options activity) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares
Outstanding at beginning of period (in shares)	26,400	125,950
Granted (in shares)	0	0
Exercised (in shares)	(5,500)	(19,750)
Forfeited (in shares)	0	(1,250)
Outstanding at end of period (in shares)	20,900	104,950
Options exercisable at end of period (in shares)	20,900	104,950
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 18.60	$ 24.08
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	18.60	21.60
Forfeited (in dollars per share)	0	21.60
Outstanding at end of period (in dollars per share)	18.60	24.58
Options exercisable at end of period (in dollars per share)	$ 18.60	$ 24.58

Basis of Presentation (New Fina

Basis of Presentation (New Financial Accounting Standards) (Details) - USD ($) $ in Thousands	Jan. 01, 2017	Mar. 31, 2017	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction in tax expense	$ 888
Increase in cash from operating activities		$ 33,756	$ 24,404
Decrease in net cash from financing activities		$ 99,754	224,025
ASU 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in cash from operating activities			1,100
Decrease in net cash from financing activities			$ 1,100

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) $ in Thousands	Feb. 28, 2017USD ($)buildingshares	Feb. 05, 2016USD ($)shares	Sep. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Mar. 31, 2016USD ($)
Business Acquisition [Line Items]
Assets				$ 8,361,845	$ 8,247,079	$ 8,253,779
Loans outstanding				5,306,605	5,297,395
Deposits				7,089,861	6,847,411
Premises, furniture and equipment held for sale				1,242	$ 414
Founders Bancorp
Business Acquisition [Line Items]
Total purchase price	$ 31,000
Assets	213,900
Deposits	$ 181,500
Purchase price paid by delivery of shares of common stock (shares) | shares	455,877
Purchase price in cash	$ 8,400
Loans	$ 96,400
Number of bank buildings held-for-sale (building) | building	1
Premises, furniture and equipment held for sale	$ 576
CIC Bancshares, Inc.
Business Acquisition [Line Items]
Total purchase price		$ 76,900
Assets		772,600
Deposits		$ 648,100
Purchase price paid by delivery of shares of common stock (shares) | shares		2,003,235
Purchase price in cash		$ 15,700
Loans		581,500
Other borrowings		7,900
CIC Bancshares, Inc. | Preferred Stock
Business Acquisition [Line Items]
Convertible preferred stock issue, fair value		$ 3,800
Citywide Banks of Colorado, Inc. | Citywide Banks of Colorado, Inc.
Business Acquisition [Line Items]
Assets				1,350,000
Loans outstanding				982,000
Deposits				$ 1,170,000
Scenario, Forecast | Citywide Banks of Colorado, Inc.
Business Acquisition [Line Items]
Total purchase price			$ 203,000

Securities (Securities availabl

Securities (Securities available for sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,938,457	$ 1,893,947
Gross Unrealized Gains	7,059	9,547
Gross Unrealized Losses	(51,988)	(57,630)
Estimated Fair Value	1,893,528	1,845,864
Total debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,923,248	1,879,496
Gross Unrealized Gains	6,927	9,478
Gross Unrealized Losses	(51,988)	(57,630)
Estimated Fair Value	1,878,187	1,831,344
U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,027	4,716
Gross Unrealized Gains	71	16
Gross Unrealized Losses	(31)	(32)
Estimated Fair Value	15,067	4,700
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,319,662	1,321,760
Gross Unrealized Gains	3,859	7,026
Gross Unrealized Losses	(34,994)	(38,286)
Estimated Fair Value	1,288,527	1,290,500
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	588,559	553,020
Gross Unrealized Gains	2,997	2,436
Gross Unrealized Losses	(16,963)	(19,312)
Estimated Fair Value	574,593	536,144
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,209	14,451
Gross Unrealized Gains	132	69
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 15,341	$ 14,520

Securities (Held to maturity se

Securities (Held to maturity securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 260,616	$ 263,662
Gross Unrealized Gains	13,176	12,282
Gross Unrealized Losses	(995)	(1,145)
Estimated Fair Value	272,797	274,799
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	260,616	263,662
Gross Unrealized Gains	13,176	12,282
Gross Unrealized Losses	(995)	(1,145)
Estimated Fair Value	$ 272,797	$ 274,799

Securities (Other securities) (

Securities (Other securities) (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Investment [Line Items]
Fair value of securities pledged	$ 714.5	$ 810.6
FHLB	$ 14.4	$ 14.4
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 (Other-than-temporar

Securities (Other-than-temporary impairments) (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Carrying value of held to maturity securities		$ 4,400,000
Realized gross gains (losses) on held to maturity securities	$ 0	0
Gross realized gains on available-for-sale securities	0	0
Gross realized losses on available-for-sale securities	1,339,000	682,000
Mortgage Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Realized gross gains on carrying value of securities		89,000
Realized gross gains (losses) on held to maturity securities	0	(439,000)
Gross realized losses on available-for-sale securities	$ 0	$ 85,000

Securities (Securities availa38

Securities (Securities available for sale (debt maturities)) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in 1 year or less	$ 380
Due in 1 to 5 years	47,478
Due in 5 to 10 years	96,785
Due after 10 years	458,943
Total debt securities	603,586
Mortgage-backed securities	1,319,662
Equity securities	15,209
Amortized Cost	1,938,457	$ 1,893,947
Estimated Fair Value
Due in 1 year or less	380
Due in 1 to 5 years	47,375
Due in 5 to 10 years	94,282
Due after 10 years	447,623
Total debt securities	589,660
Mortgage-backed securities	1,288,527
Equity securities	15,341
Estimated Fair Value	$ 1,893,528	$ 1,845,864

Securities (Securities held to

Securities (Securities held to maturity (debt maturities)) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in 1 year or less	$ 1,993
Due in 1 to 5 years	19,307
Due in 5 to 10 years	89,388
Due after 10 years	149,928
Amortized Cost	260,616	$ 263,662
Estimated Fair Value
Due in 1 year or less	2,022
Due in 1 to 5 years	20,246
Due in 5 to 10 years	92,873
Due after 10 years	157,656
Estimated Fair Value	$ 272,797	$ 274,799

Securities (Realized gain (loss

Securities (Realized gain (loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 221,637	$ 303,448
Gross security gains	3,830	4,558
Gross security losses	$ 1,339	$ 682

Securities (Available for sale

Securities (Available for sale securities losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value
Less than 12 months	$ 1,154,216	$ 1,162,538
12 months or longer	316,936	272,700
Total	1,471,152	1,435,238
Unrealized Losses
Less than 12 months	(34,842)	(42,868)
12 months or longer	(17,146)	(14,762)
Total	(51,988)	(57,630)
Total debt securities
Fair Value
Less than 12 months	1,154,216	1,162,538
12 months or longer	316,936	272,700
Total	1,471,152	1,435,238
Unrealized Losses
Less than 12 months	(34,842)	(42,868)
12 months or longer	(17,146)	(14,762)
Total	(51,988)	(57,630)
U.S. government corporations and agencies
Fair Value
Less than 12 months	4,071	4,185
12 months or longer	0	0
Total	4,071	4,185
Unrealized Losses
Less than 12 months	(31)	(32)
12 months or longer	0	0
Total	(31)	(32)
Mortgage-backed securities
Fair Value
Less than 12 months	696,073	744,202
12 months or longer	316,686	272,449
Total	1,012,759	1,016,651
Unrealized Losses
Less than 12 months	(17,851)	(23,527)
12 months or longer	(17,143)	(14,759)
Total	(34,994)	(38,286)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	454,072	414,151
12 months or longer	250	251
Total	454,322	414,402
Unrealized Losses
Less than 12 months	(16,960)	(19,309)
12 months or longer	(3)	(3)
Total	(16,963)	(19,312)
Equity securities
Fair Value
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Unrealized Losses
Less than 12 months	0	0
12 months or longer	0	0
Total	$ 0	$ 0

Securities (Held to maturity 42

Securities (Held to maturity securities losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value
Less than 12 months	$ 24,248	$ 31,479
12 months or longer	2,024	2,017
Total	26,272	33,496
Unrealized Losses
Less than 12 months	(752)	(884)
12 months or longer	(243)	(261)
Total	(995)	(1,145)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	24,248	31,479
12 months or longer	2,024	2,017
Total	26,272	33,496
Unrealized Losses
Less than 12 months	(752)	(884)
12 months or longer	(243)	(261)
Total	$ (995)	$ (1,145)

Securities (Other-than-tempor43

Securities (Other-than-temporary impairments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Recorded as part of gross realized losses:
Credit related OTTI	$ 0	$ 0
Intent to sell OTTI	0	0
Total recorded as part of gross realized losses	0	0
Recorded directly to AOCI for non-credit related impairment:
Residential mortgage backed securities	0	0
Reduction of non-credit related impairment related to security sales	0	(120)
Accretion of non-credit related impairment	0	(7)
Total changes to AOCI for non-credit related impairment	0	(127)
Total OTTI losses (accretion) recorded on debt securities, net	$ 0	$ (127)

Loans (Loans receivable) (Detai

Loans (Loans receivable) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 5,363,737	$ 5,353,702
Unearned discount	(668)	(699)
Deferred loan fees	(1,465)	(1,284)
Total net loans receivable held to maturity	5,361,604	5,351,719
Allowance for loan losses	(54,999)	(54,324)
Loans receivable, net	5,306,605	5,297,395
Loans secured by residential real estate property in process of foreclosure	$ 2,600
Threshold period past due, nonperforming status of loans and leases	90 days
Commercial
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 3,849,748	3,825,847
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	$ 1,314,393	1,287,265
Commercial | Commercial real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	2,535,355	2,538,582
Agricultural and agricultural real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	481,125	489,318
Residential real estate
Loans and Leases [Line Items]
Gross loans receivable held to maturity	$ 604,902	617,924
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	$ 427,962	$ 420,613
Consumer | Citizens Finance Co | Loans and Finance Receivables
Loans and Leases [Line Items]
Concentration risk, percentage	18.00%

Loans (Allowance for credit los

Loans (Allowance for credit losses on financing receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	$ 6,363	$ 6,753
Ending Balance Under ASC 450-20	48,636	47,571
Total	54,999	54,324	$ 49,738	$ 48,685
Ending Balance Evaluated for Impairment Under ASC 310-10-35	84,908	97,373
Ending Balance Evaluated for Impairment Under ASC 450-20	5,278,829	5,256,329
Total	5,363,737	5,353,702
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,849,748	3,825,847
Commercial | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	1,763	1,318
Ending Balance Under ASC 450-20	14,417	13,447
Total	16,180	14,765	16,374	16,095
Ending Balance Evaluated for Impairment Under ASC 310-10-35	3,989	3,712
Ending Balance Evaluated for Impairment Under ASC 450-20	1,310,404	1,283,553
Total	1,314,393	1,287,265
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	2,666	2,671
Ending Balance Under ASC 450-20	21,131	21,648
Total	23,797	24,319	20,495	19,532
Ending Balance Evaluated for Impairment Under ASC 310-10-35	34,549	45,217
Ending Balance Evaluated for Impairment Under ASC 450-20	2,500,806	2,493,365
Total	2,535,355	2,538,582
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	41	816
Ending Balance Under ASC 450-20	3,942	3,394
Total	3,983	4,210	4,028	3,887
Ending Balance Evaluated for Impairment Under ASC 310-10-35	13,243	16,730
Ending Balance Evaluated for Impairment Under ASC 450-20	467,882	472,588
Total	481,125	489,318
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	496	497
Ending Balance Under ASC 450-20	1,687	1,766
Total	2,183	2,263	1,851	1,934
Ending Balance Evaluated for Impairment Under ASC 310-10-35	26,978	25,726
Ending Balance Evaluated for Impairment Under ASC 450-20	577,924	592,198
Total	604,902	617,924
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending Balance Under ASC 310-10-35	1,397	1,451
Ending Balance Under ASC 450-20	7,459	7,316
Total	8,856	8,767	$ 6,990	$ 7,237
Ending Balance Evaluated for Impairment Under ASC 310-10-35	6,149	5,988
Ending Balance Evaluated for Impairment Under ASC 450-20	421,813	414,625
Total	$ 427,962	$ 420,613

Loans (Financing receivables, n

Loans (Financing receivables, non accrual status) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Nonaccrual loans	$ 61,789	$ 62,591
Nonaccrual troubled debt restructured loans	1,079	1,708
Total nonaccrual loans	62,868	64,299
Accruing loans past due 90 days or more	872	86
Performing troubled debt restructured loans	$ 11,010	$ 10,380

Loans (Troubled debt restructur

Loans (Troubled debt restructuring on loans modified) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)loan	Mar. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	0
Pre- Modification Recorded Investment	$ 348	$ 0
Post- Modification Recorded Investment	$ 348	$ 0
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre- Modification Recorded Investment	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0
Commercial | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre- Modification Recorded Investment	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0
Commercial | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre- Modification Recorded Investment	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0
Agricultural and agricultural real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre- Modification Recorded Investment	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	0
Pre- Modification Recorded Investment	$ 348	$ 0
Post- Modification Recorded Investment	$ 348	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre- Modification Recorded Investment	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0

Loans (Troubled debt in text) (

Loans (Troubled debt in text) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Number of loans for which there was a payment default (loan)	$ 0	$ 0
Gross loans receivable held to maturity	5,363,737,000		$ 5,353,702,000
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 (Credit quality indicator

Loans (Credit quality indicator) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 5,363,737	$ 5,353,702
Loans delinquent 30 to 89 days, percentage	0.44%	0.37%
Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 4,980,862	$ 4,985,600
Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 382,875	$ 368,102
Percent of nonaccrual loans	17.00%	17.00%
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	54.00%	47.00%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Percent of loans	46.00%	53.00%
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 3,849,748	$ 3,825,847
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	3,579,309	3,567,189
Commercial | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	270,439	258,658
Commercial | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	1,314,393	1,287,265
Commercial | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	1,216,550	1,187,557
Commercial | Commercial | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	97,843	99,708
Commercial | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	2,535,355	2,538,582
Commercial | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	2,362,759	2,379,632
Commercial | Commercial real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	172,596	158,950
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	481,125	489,318
Agricultural and agricultural real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	415,716	424,311
Agricultural and agricultural real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	65,409	65,007
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	604,902	617,924
Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	569,322	584,626
Residential real estate | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	35,580	33,298
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	427,962	420,613
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	416,515	409,474
Consumer | Nonpass
Financing Receivable, Recorded Investment [Line Items]
Total gross loans receivable held to maturity	$ 11,447	$ 11,139

Loans (Past due financing recei

Loans (Past due financing receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 24,572	$ 19,945
Accruing Loans and Leases, Current	5,276,297	5,269,458
Nonaccrual	62,868	64,299
Total	5,363,737	5,353,702
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	20,060	10,653
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	3,640	9,206
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	872	86
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	19,080	6,238
Accruing Loans and Leases, Current	3,803,136	3,794,310
Nonaccrual	27,532	25,299
Total	3,849,748	3,825,847
Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	15,558	2,013
Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,731	4,148
Commercial | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	791	77
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	4,428	4,815
Accruing Loans and Leases, Current	2,506,236	2,513,069
Nonaccrual	24,691	20,698
Total	2,535,355	2,538,582
Commercial | Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	3,618	886
Commercial | Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	310	3,929
Commercial | Commercial real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	500	0
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	14,652	1,423
Accruing Loans and Leases, Current	1,296,900	1,281,241
Nonaccrual	2,841	4,601
Total	1,314,393	1,287,265
Commercial | Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	11,940	1,127
Commercial | Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,421	219
Commercial | Commercial | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	291	77
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	408	3,390
Accruing Loans and Leases, Current	469,918	472,597
Nonaccrual	10,799	13,331
Total	481,125	489,318
Agricultural and agricultural real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	347	199
Agricultural and agricultural real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	0	3,191
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	61	0
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,304	5,832
Accruing Loans and Leases, Current	581,850	590,626
Nonaccrual	20,748	21,466
Total	604,902	617,924
Residential real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,141	4,986
Residential real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	163	846
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	2,780	4,485
Accruing Loans and Leases, Current	421,393	411,925
Nonaccrual	3,789	4,203
Total	427,962	420,613
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	2,014	3,455
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	746	1,021
Consumer | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans and Leases, Past Due	$ 20	$ 9

Loans (Impaired loans) (Details

Loans (Impaired loans) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Unpaid Contractual Balance
Total impaired loans with a related allowance	$ 20,776	$ 25,978
Total impaired loans without a related allowance	65,266	72,511
Total impaired loans held to maturity	86,042	98,489
Loan Balance
Total impaired loans with a related allowance	20,764	25,966
Total impaired loans without a related allowance	64,144	71,407
Total impaired loans held to maturity	84,908	97,373
Related Allowance Recorded	6,363	6,753
Average Loan Balance
Total impaired loans with a related allowance	24,007	21,126
Total impaired loans without a related allowance	70,523	78,788
Total impaired loans held to maturity	94,530	99,914
Interest Income Recognized
Total impaired loans with a related allowance	167	129
Total impaired loans without a related allowance	386	2,325
Total impaired loans held to maturity	553	2,454
Commercial
Unpaid Contractual Balance
Total impaired loans with a related allowance	15,264	17,073
Total impaired loans without a related allowance	24,404	32,800
Total impaired loans held to maturity	39,668	49,873
Loan Balance
Total impaired loans with a related allowance	15,252	17,061
Total impaired loans without a related allowance	23,286	31,868
Total impaired loans held to maturity	38,538	48,929
Related Allowance Recorded	4,429	3,989
Average Loan Balance
Total impaired loans with a related allowance	16,411	13,761
Total impaired loans without a related allowance	29,195	44,961
Total impaired loans held to maturity	45,606	58,722
Interest Income Recognized
Total impaired loans with a related allowance	141	23
Total impaired loans without a related allowance	255	1,898
Total impaired loans held to maturity	396	1,921
Commercial | Commercial
Unpaid Contractual Balance
Total impaired loans with a related allowance	2,841	2,852
Total impaired loans without a related allowance	1,201	925
Total impaired loans held to maturity	4,042	3,777
Loan Balance
Total impaired loans with a related allowance	2,829	2,840
Total impaired loans without a related allowance	1,160	872
Total impaired loans held to maturity	3,989	3,712
Related Allowance Recorded	1,763	1,318
Average Loan Balance
Total impaired loans with a related allowance	2,776	3,136
Total impaired loans without a related allowance	1,650	5,329
Total impaired loans held to maturity	4,426	8,465
Interest Income Recognized
Total impaired loans with a related allowance	137	2
Total impaired loans without a related allowance	59	251
Total impaired loans held to maturity	196	253
Commercial | Commercial real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	12,423	14,221
Total impaired loans without a related allowance	23,203	31,875
Total impaired loans held to maturity	35,626	46,096
Loan Balance
Total impaired loans with a related allowance	12,423	14,221
Total impaired loans without a related allowance	22,126	30,996
Total impaired loans held to maturity	34,549	45,217
Related Allowance Recorded	2,666	2,671
Average Loan Balance
Total impaired loans with a related allowance	13,635	10,625
Total impaired loans without a related allowance	27,545	39,632
Total impaired loans held to maturity	41,180	50,257
Interest Income Recognized
Total impaired loans with a related allowance	4	21
Total impaired loans without a related allowance	196	1,647
Total impaired loans held to maturity	200	1,668
Agricultural and agricultural real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	575	2,771
Total impaired loans without a related allowance	12,668	13,959
Total impaired loans held to maturity	13,243	16,730
Loan Balance
Total impaired loans with a related allowance	575	2,771
Total impaired loans without a related allowance	12,668	13,959
Total impaired loans held to maturity	13,243	16,730
Related Allowance Recorded	41	816
Average Loan Balance
Total impaired loans with a related allowance	2,013	912
Total impaired loans without a related allowance	13,512	12,722
Total impaired loans held to maturity	15,525	13,634
Interest Income Recognized
Total impaired loans with a related allowance	5	21
Total impaired loans without a related allowance	35	157
Total impaired loans held to maturity	40	178
Residential real estate
Unpaid Contractual Balance
Total impaired loans with a related allowance	2,464	3,490
Total impaired loans without a related allowance	24,518	22,408
Total impaired loans held to maturity	26,982	25,898
Loan Balance
Total impaired loans with a related allowance	2,464	3,490
Total impaired loans without a related allowance	24,514	22,236
Total impaired loans held to maturity	26,978	25,726
Related Allowance Recorded	496	497
Average Loan Balance
Total impaired loans with a related allowance	3,103	3,371
Total impaired loans without a related allowance	24,061	18,446
Total impaired loans held to maturity	27,164	21,817
Interest Income Recognized
Total impaired loans with a related allowance	10	43
Total impaired loans without a related allowance	77	202
Total impaired loans held to maturity	87	245
Consumer
Unpaid Contractual Balance
Total impaired loans with a related allowance	2,473	2,644
Total impaired loans without a related allowance	3,676	3,344
Total impaired loans held to maturity	6,149	5,988
Loan Balance
Total impaired loans with a related allowance	2,473	2,644
Total impaired loans without a related allowance	3,676	3,344
Total impaired loans held to maturity	6,149	5,988
Related Allowance Recorded	1,397	1,451
Average Loan Balance
Total impaired loans with a related allowance	2,480	3,082
Total impaired loans without a related allowance	3,755	2,659
Total impaired loans held to maturity	6,235	5,741
Interest Income Recognized
Total impaired loans with a related allowance	11	42
Total impaired loans without a related allowance	19	68
Total impaired loans held to maturity	$ 30	$ 110

Loans (Purchased impaired loans

Loans (Purchased impaired loans (in text)) (Details) - USD ($) $ in Millions	Feb. 28, 2017	Feb. 05, 2016
Founders Bancorp
Financing Receivable, Impaired [Line Items]
Loans	$ 98.9
Loans held to maturity	$ 96.4
Centennial Bank
Financing Receivable, Impaired [Line Items]
Loans		$ 594.9
Loans held to maturity		$ 581.5

Loans (Carrying amount loans) (

Loans (Carrying amount loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	$ 4,443	$ 4,463
Non Impaired Purchased Loans	909,214	926,216
Total Purchased Loans	913,657	930,679
Commercial | Commercial
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	1,962	2,198
Non Impaired Purchased Loans	94,339	99,082
Total Purchased Loans	96,301	101,280
Commercial | Commercial real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	2,294	2,079
Non Impaired Purchased Loans	617,124	622,117
Total Purchased Loans	619,418	624,196
Agricultural and agricultural real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	1,339	181
Total Purchased Loans	1,339	181
Residential real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	187	186
Non Impaired Purchased Loans	147,389	157,468
Total Purchased Loans	147,576	157,654
Consumer
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	49,023	47,368
Total Purchased Loans	$ 49,023	$ 47,368

Loans (Change in accretable yie

Loans (Change in accretable yield) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 182	$ 557
Original yield discount, net, at date of acquisitions	0	19
Accretion	(173)	(273)
Reclassification from nonaccretable difference	127	2
Balance at end of period	$ 136	$ 305

Loans (Carrying amount loans (i

Loans (Carrying amount loans (in text)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 54,999		$ 54,324
Provision for loan losses	3,641	$ 2,067
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	589		$ 588
Provision for loan losses	1	$ 124
Contractually required payments receivable of nonimpaired loans	1,650,000
Estimated fair value of nonimpaired loans acquired	$ 1,600,000

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 54,324	$ 48,685
Charge-offs	(3,718)	(1,605)
Recoveries	752	591
Provision	3,641	2,067
Ending Balance	54,999	49,738
Commercial | Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	14,765	16,095
Charge-offs	(230)	(98)
Recoveries	234	176
Provision	1,411	201
Ending Balance	16,180	16,374
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	24,319	19,532
Charge-offs	(608)	(312)
Recoveries	212	146
Provision	(126)	1,129
Ending Balance	23,797	20,495
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,210	3,887
Charge-offs	(871)	0
Recoveries	1	3
Provision	643	138
Ending Balance	3,983	4,028
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	2,263	1,934
Charge-offs	(265)	(37)
Recoveries	2	20
Provision	183	(66)
Ending Balance	2,183	1,851
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	8,767	7,237
Charge-offs	(1,744)	(1,158)
Recoveries	303	246
Provision	1,530	665
Ending Balance	$ 8,856	$ 6,990

Goodwill, Core Deposit Premiu57

Goodwill, Core Deposit Premium and Other Intangible Assets (Goodwill) (Details) - USD ($)	Sep. 30, 2016	Feb. 05, 2016	Mar. 31, 2017	Feb. 28, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill			$ 141,461,000		$ 127,699,000
Goodwill impairment	$ 0
Founders Bancorp
Goodwill [Line Items]
Goodwill				$ 13,800,000
Founders Bancorp | Core Deposits
Goodwill [Line Items]
Intangibles recognized				$ 2,500,000
CIC Bancshares, Inc.
Goodwill [Line Items]
Goodwill		$ 29,800,000
CIC Bancshares, Inc. | Core Deposits
Goodwill [Line Items]
Intangibles recognized		$ 6,400,000
Intangibles, amortization period		10 years
CIC Bancshares, Inc. | Commercial Servicing Rights
Goodwill [Line Items]
Intangibles recognized		$ 190,000

Goodwill, Core Deposit Premiu58

Goodwill, Core Deposit Premium and Other Intangible Assets (Carrying amount of intangible assets (incl accumulated amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 105,044	$ 101,652
Accumulated Amortization	45,535	43,099
Net Carrying Amount	59,509	58,553
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	45,968	43,504
Accumulated Amortization	22,211	21,049
Net Carrying Amount	23,757	22,455
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	51,302	50,467
Accumulated Amortization	19,343	18,379
Net Carrying Amount	31,959	32,088
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,177	1,177
Accumulated Amortization	866	857
Net Carrying Amount	311	320
Commercial servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,597	6,504
Accumulated Amortization	3,115	2,814
Net Carrying Amount	$ 3,482	$ 3,690

Goodwill, Core Deposit Premiu59

Goodwill, Core Deposit Premium and Other Intangible Assets (Estimated future amortization expense for amortizable intangible assets) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Future amortization expense for amortizable intangible assets [Line Items]
Nine months ending December 31, 2017	$ 11,023
Year ending December 31,
2,018	11,383
2,019	9,812
2,020	8,273
2,021	6,755
2,022	4,930
Thereafter	7,333
Total	59,509
Core deposit intangibles
Future amortization expense for amortizable intangible assets [Line Items]
Nine months ending December 31, 2017	3,577
Year ending December 31,
2,018	4,261
2,019	3,741
2,020	3,264
2,021	2,716
2,022	1,876
Thereafter	4,322
Total	23,757
Mortgage servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Nine months ending December 31, 2017	6,784
Year ending December 31,
2,018	6,294
2,019	5,395
2,020	4,496
2,021	3,596
2,022	2,697
Thereafter	2,697
Total	31,959
Customer relationship intangible
Future amortization expense for amortizable intangible assets [Line Items]
Nine months ending December 31, 2017	30
Year ending December 31,
2,018	39
2,019	38
2,020	37
2,021	35
2,022	34
Thereafter	98
Total	311
Commercial servicing rights
Future amortization expense for amortizable intangible assets [Line Items]
Nine months ending December 31, 2017	632
Year ending December 31,
2,018	789
2,019	638
2,020	476
2,021	408
2,022	323
Thereafter	216
Total	$ 3,482

Goodwill, Core Deposit Premiu60

Goodwill, Core Deposit Premium and Other Intangible Assets (Mortgage and commercial loans servicing) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Valuation servicing rights in tranches [Line Items]
Mortgage loans serviced for others	$ 4,340,000,000		$ 4,310,000,000
Custodial escrow balances maintained	27,300,000		21,400,000
Loans serviced	35,441,000		35,778,000
Mortgage Servicing Rights
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	$ 47,564,000	$ 45,210,000	$ 45,200,000
Prepayment rate	9.39%		9.63%
Discount rate	9.25%		9.26%
Fees collected for servicing of mortgage loans	$ 3,200,000	$ 2,900,000
Mortgage Servicing Rights | Minimum
Valuation servicing rights in tranches [Line Items]
Average cap rate	1.00%	0.88%
Mortgage Servicing Rights | Maximum
Valuation servicing rights in tranches [Line Items]
Average cap rate	1.50%	1.35%
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	$ 4,040,000	$ 4,899,000
Fees collected for servicing of mortgage loans	415,000	$ 80,000
Loans serviced	$ 160,700,000
Commercial Servicing Rights | Minimum
Valuation servicing rights in tranches [Line Items]
Prepayment rate	6.72%		6.96%
Discount rate	12.07%		12.44%
Average cap rate	3.10%	3.10%
Commercial Servicing Rights | Maximum
Valuation servicing rights in tranches [Line Items]
Prepayment rate	8.07%		7.88%
Discount rate	13.69%		13.88%
Average cap rate	4.45%	4.45%
Commercial Servicing Rights Less Than 20 Years
Valuation servicing rights in tranches [Line Items]
Servicing asset at amortized value	$ 1,108,000		$ 1,200,000
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	$ 2,932,000		2,927,000
Servicing asset, agreement term	20 years
Valuation allowance	$ 28,000		$ 33,000

Goodwill, Core Deposit Premiu61

Goodwill, Core Deposit Premium and Other Intangible Assets (Changes in capitalized mortgage and commercial servicing rights) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Valuation allowance on commercial servicing rights	$ 5	$ 0
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	32,088	30,314
Originations	2,132	2,395
Amortization	(2,261)	(2,259)
Balance at end of period	31,959	30,450
Fair value of servicing rights	$ 47,564	$ 45,210	$ 45,200
Servicing rights, net to servicing portfolio (as a percent)	0.74%	0.74%
Commercial servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	$ 3,690	$ 4,611
Purchased commercial servicing rights	0	190
Originations	93	195
Amortization	(306)	(536)
Valuation allowance on commercial servicing rights	5	0
Balance at end of period	3,482	4,460
Fair value of servicing rights	$ 4,040	$ 4,899
Servicing rights, net to servicing portfolio (as a percent)	2.17%	2.35%

Goodwill, Core Deposit Premiu62

Goodwill, Core Deposit Premium and Other Intangible Assets (Book value, fair value of commercial serving rights and impairment) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Less than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	$ 896,000	$ 1,008,000
Fair Value	1,108,000	1,200,000
Impairment	0	0
Less than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	17,000	19,000
Fair Value	18,000	23,000
Impairment	0	0
Less than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	131,000	156,000
Fair Value	161,000	180,000
Impairment	0	0
Less than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	748,000	833,000
Fair Value	929,000	997,000
Impairment	0	0
More than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	2,614,000	2,715,000
Fair Value	2,932,000	2,927,000
Impairment	28,000	33,000
More than 20 Years | Centennial Bank and Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	103,000	107,000
Fair Value	114,000	114,000
Impairment	0	0
More than 20 Years | Premier Valley Bank
Finite-Lived Intangible Assets [Line Items]
Book Value	345,000	359,000
Fair Value	317,000	326,000
Impairment	28,000	33,000
More than 20 Years | Wisconsin Bank & Trust
Finite-Lived Intangible Assets [Line Items]
Book Value	2,166,000	2,249,000
Fair Value	2,501,000	2,487,000
Impairment	$ 0	$ 0

Derivative Financial Instrume63

Derivative Financial Instruments (Cash collateral on derivative financial instruments) (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Cash pledged as collateral	$ 1,800,000	$ 2,200,000
Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 0

Derivative Financial Instrume64

Derivative Financial Instruments (Estimated cash payments and reclassification to interest expense) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in net unrealized losses on cash flow hedges	$ 397
Estimated amount to be reclassified from accumulated other comprehensive income to interest expense within the next twelve months	$ 1,600

Derivative Financial Instrume65

Derivative Financial Instruments (Executed interest rate swap) (Details) - Derivative Financial Instruments $ in Millions	Mar. 31, 2017USD ($)transaction	May 10, 2016USD ($)	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 Instrume66

Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other liabilities | Interest Rate Swap due March 17, 2021
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 25,000	$ 25,000
Fair Value, Other Liabilities	$ (346)	$ (447)
Receive Rate	1.148%	0.993%
Weighted Average Pay Rate	2.255%	2.255%
Other liabilities | Interest Rate Swap due March 1, 2017
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 0	$ 20,000
Fair Value, Other Liabilities	$ 0	$ (114)
Receive Rate	0.00%	0.931%
Weighted Average Pay Rate	3.22%	3.22%
Other liabilities | Interest Rate Swap due January 7, 2020
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 20,000	$ 20,000
Fair Value, Other Liabilities	$ (996)	$ (1,145)
Receive Rate	1.009%	0.868%
Weighted Average Pay Rate	3.355%	3.355%
Other liabilities | Interest Rate Swap due March 26, 2019
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 10,000	$ 10,000
Fair Value, Other Liabilities	$ (17)	$ (42)
Receive Rate	1.153%	0.997%
Weighted Average Pay Rate	1.674%	1.674%
Other liabilities | Interest Rate Swap due March 18, 2019
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 10,000	$ 10,000
Fair Value, Other Liabilities	$ (16)	$ (41)
Receive Rate	1.148%	0.993%
Weighted Average Pay Rate	1.658%	1.658%
Other liabilities | Interest Rate Swap due June 15, 2024
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 20,000	$ 20,000
Fair Value, Other Liabilities	$ (207)	$ (214)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.39%	2.39%
Other liabilities | Interest Rate Swap due March 1, 2024
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	$ 20,000	$ 20,000
Fair Value, Other Liabilities	$ (253)	$ (262)
Receive Rate	1.055%	0.00%
Weighted Average Pay Rate	2.352%	2.352%
Other assets | Interest Rate Swap due May 10, 2021
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	$ 36,667	$ 37,667
Fair Value, Other Assets	$ 633	$ 530
Receive Rate	3.358%	3.164%
Weighted Average Pay Rate	3.674%	3.674%

Derivative Financial Instrume67

Derivative Financial Instruments (Gains (losses) recognized on derivatives (cash flow hedges)) (Details) - Interest Rate Swap - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest Expense
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	$ 533	$ (2,917)
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	(397)	(506)
Other Income
Trading Activity, Gains and Losses, Net [Line Items]
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	$ 0	$ 0

Derivative Financial Instrume68

Derivative Financial Instruments (Narrative) (Details)	Mar. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Feb. 05, 2016USD ($)shares
Derivative [Line Items]
Cash pledged as collateral	$ 1,800,000	$ 2,200,000
Number of shares to be issued upon conversion | shares	14,353	20,481	73,394
Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 0
Not Designated as Hedging Instrument
Derivative [Line Items]
Cash pledged as collateral	30,000	0
Not Designated as Hedging Instrument | Counterparties
Derivative [Line Items]
Cash pledged as collateral	8,000	2,900,000
Other liabilities
Derivative [Line Items]
Derivative, notional amount			$ 2,000,000
Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Cash pledged as collateral	5,000,000	5,000,000
Back-to-back Loan Swaps | Interest Rate Swap
Derivative [Line Items]
Cash pledged as collateral	997,000	1,800,000
Back-to-back Loan Swaps | Interest Rate Swap | Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 768,000	$ 768,000

Derivative Financial Instrume69

Derivative Financial Instruments (Fair value hedge) (Details) - Other liabilities - USD ($)	Mar. 31, 2017	Dec. 31, 2016	Feb. 05, 2016
Derivative [Line Items]
Notional Amount			$ 2,000,000
Fair Value Hedging
Derivative [Line Items]
Notional Amount	$ 36,144,000	$ 40,807,000
Fair Value	$ (1,432,000)	$ (1,626,000)

Derivative Financial Instrume70

Derivative Financial Instruments (Gains (losses) on fair value hedges) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value Hedging | Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$ 194	$ (1,222)

Derivative Financial Instrume71

Derivative Financial Instruments (Balance sheet and income statement category and fair value of embedded derivatives) (Details) - Embedded derivatives - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Other noninterest income
Derivative [Line Items]
Gain (Loss) Recognized	$ 117	$ 272
Other assets
Derivative [Line Items]
Notional Amount	14,418		$ 14,549
Fair Value	$ 987		$ 1,104

Derivative Financial Instrume72

Derivative Financial Instruments (Balance sheet and income statement category and fair values of embedded conversion option) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 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	$ 97,000	$ (100,000)
Embedded conversion option | Other liabilities
Derivative [Line Items]
Notional Amount	391,000		$ 558,000
Fair Value	$ (325,000)		$ (422,000)

Derivative Financial Instrume73

Derivative Financial Instruments (Loan swaps) (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016	Feb. 05, 2016
Other liabilities
Derivative [Line Items]
Notional Amount			$ 2,000,000
Back-to-back Loan Swaps | Other assets
Derivative [Line Items]
Notional Amount	$ 73,780,000	$ 69,594,000
Fair Value, Receive fixed-pay floating interest rate swap	$ 1,658,000	$ 1,588,000
Weighted Average Receive Rate	4.75%	4.66%
Weighted Average Pay Rate	3.74%	3.47%
Back-to-back Loan Swaps | Other liabilities
Derivative [Line Items]
Notional Amount	$ 73,780,000	$ 69,594,000
Fair Value, Pay fixed-receive floating interest rate swap	$ (1,658,000)	$ (1,588,000)
Weighted Average Receive Rate	3.74%	3.47%
Weighted Average Pay Rate	4.75%	4.66%

Derivative Financial Instrume74

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	Mar. 31, 2017	Dec. 31, 2016
Other assets | Interest rate lock commitments (mortgage)
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	$ 92,528	$ 80,465
Fair Value, Other Assets	3,745	2,790
Other assets | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount. Other Assets	48,392	142,750
Fair Value, Other Assets	176	2,546
Other liabilities | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	123,944	59,276
Fair Value, Other Liabilities	(634)	(266)
Other liabilities | Undesignated interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount, Other Liabilities	14,418	15,564
Fair Value, Other Liabilities	$ (987)	$ (1,126)

Derivative Financial Instrume75

Derivative Financial Instruments (Derivative instruments gains and losses recognized (not designated as hedging instruments)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net gains on sale of loans held for sale | Interest rate lock commitments (mortgage)
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 1,062	$ 4,727
Net gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	(2,739)	(1,489)
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 117	$ (316)

Fair Value (Fair value measurem

Fair Value (Fair value measurement recurring) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Securities available for sale	$ 1,893,528	$ 1,845,864
U.S. government corporations and agencies
Assets
Securities available for sale	15,067	4,700
Mortgage-backed securities
Assets
Securities available for sale	1,288,527	1,290,500
Obligations of states and political subdivisions
Assets
Securities available for sale	574,593	536,144
Equity securities
Assets
Securities available for sale	15,341	14,520
Level 1
Assets
Securities available for sale	10,496	517
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	1,883,032	1,843,123
Derivative assets	3,278	3,222
Liabilities
Derivative liabilities	6,237	7,027
Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Level 2 | Forward commitments
Assets
Derivative assets	176	2,546
Liabilities
Derivative liabilities	634	266
Level 3
Assets
Securities available for sale	0	2,224
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 3 | Interest rate lock commitments
Assets
Derivative assets	3,745	2,790
Level 3 | Forward commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis
Assets
Total assets at fair value	1,900,727	1,854,422
Liabilities
Total liabilities at fair value	6,871	7,293
Recurring Basis | Derivative financial instruments
Assets
Derivative assets	3,278	3,222
Liabilities
Derivative liabilities	6,237	7,027
Recurring Basis | Interest rate lock commitments
Assets
Derivative assets	3,745	2,790
Recurring Basis | Forward commitments
Assets
Derivative assets	176	2,546
Liabilities
Derivative liabilities	634	266
Recurring Basis | U.S. government corporations and agencies
Assets
Securities available for sale	15,067	4,700
Recurring Basis | Mortgage-backed securities
Assets
Securities available for sale	1,288,527	1,290,500
Recurring Basis | Obligations of states and political subdivisions
Assets
Securities available for sale	574,593	536,144
Recurring Basis | Equity securities
Assets
Securities available for sale	15,341	14,520
Recurring Basis | Level 1
Assets
Total assets at fair value	10,496	517
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	10,496	517
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 | Equity securities
Assets
Securities available for sale	0	0
Recurring Basis | Level 2
Assets
Total assets at fair value	1,886,486	1,848,891
Liabilities
Total liabilities at fair value	6,871	7,293
Recurring Basis | Level 2 | Derivative financial instruments
Assets
Derivative assets	3,278	3,222
Liabilities
Derivative liabilities	6,237	7,027
Recurring Basis | Level 2 | Interest rate lock commitments
Assets
Derivative assets	0	0
Recurring Basis | Level 2 | Forward commitments
Assets
Derivative assets	176	2,546
Liabilities
Derivative liabilities	634	266
Recurring Basis | Level 2 | U.S. government corporations and agencies
Assets
Securities available for sale	4,571	4,183
Recurring Basis | Level 2 | Mortgage-backed securities
Assets
Securities available for sale	1,288,527	1,288,276
Recurring Basis | Level 2 | Obligations of states and political subdivisions
Assets
Securities available for sale	574,593	536,144
Recurring Basis | Level 2 | Equity securities
Assets
Securities available for sale	15,341	14,520
Recurring Basis | Level 3
Assets
Total assets at fair value	3,745	5,014
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	3,745	2,790
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	0	2,224
Recurring Basis | Level 3 | Obligations of states and political subdivisions
Assets
Securities available for sale	0	0
Recurring Basis | Level 3 | Equity securities
Assets
Securities available for sale	$ 0	$ 0

Fair Value (Fair value measur77

Fair Value (Fair value measurement non-recurring) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	$ 1,242	$ 414
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	11,188	9,744
Significant Unobservable Inputs (Level 3) | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	317	326
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	1,242	414
Significant Unobservable Inputs (Level 3) | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,216	1,683
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	1,490	3,026
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	534	1,955
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	2,097	3,565
Significant Unobservable Inputs (Level 3) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,076	1,193
Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	6,413	11,422
Other real estate owned	11,188	9,744
Nonrecurring Basis | Commercial servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial servicing rights	317	326
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	1,242	414
Nonrecurring Basis | Commercial | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,216	1,683
Nonrecurring Basis | Commercial | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,490	3,026
Nonrecurring Basis | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	534	1,955
Nonrecurring Basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,097	3,565
Nonrecurring Basis | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,076	1,193
Nonrecurring Basis | Year-to- Date Losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	375	653
Other real estate owned	274	1,341
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	0	33
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	0	35
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	0	41
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	375	527
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	85
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	6,413	11,422
Other real estate owned	11,188	9,744
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	317	326
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	1,242	414
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	1,216	1,683
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	1,490	3,026
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	534	1,955
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	2,097	3,565
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	$ 1,076	$ 1,193

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 fair value measurements) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 1,893,528	$ 1,845,864
Premises, furniture and equipment held for sale	$ 1,242	$ 414
Commercial servicing rights | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	12.07%	12.44%
Commercial servicing rights | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	13.69%	13.88%
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 0	$ 2,224
Derivative assets	0	0
Other real estate owned	$ 11,188	$ 9,744
Level 3 | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	10.00%	10.00%
Level 3 | Commercial | Commercial
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 1,216	$ 1,683
Level 3 | Commercial | Commercial | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Commercial | Commercial | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	8.00%	8.00%
Level 3 | Commercial | Commercial real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 1,490	$ 3,026
Level 3 | Commercial | Commercial real estate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Commercial | Commercial real estate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	11.00%	7.00%
Level 3 | Agricultural and agricultural real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 534	$ 1,955
Level 3 | Agricultural and agricultural real estate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Agricultural and agricultural real estate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	10.00%	10.00%
Level 3 | Residential real estate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 2,097	$ 3,565
Level 3 | Residential real estate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Residential real estate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	10.00%	8.00%
Level 3 | Consumer
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 1,076	$ 1,193
Level 3 | Consumer | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Consumer | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	12.00%	11.00%
Level 3 | Commercial servicing rights
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Commercial servicing rights	$ 317	$ 326
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	$ 1,242	$ 414
Level 3 | Premises, furniture and equipment held for sale | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	0.00%	0.00%
Level 3 | Premises, furniture and equipment held for sale | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate	10.00%	8.00%
Level 3 | Interest rate lock commitments
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Derivative assets	$ 3,745	$ 2,790
Level 3 | Interest rate lock commitments | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Closing ratio	0.00%	0.00%
Level 3 | Interest rate lock commitments | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Closing ratio	99.00%	99.00%
Level 3 | Interest rate lock commitments | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Closing ratio	87.00%	89.00%
Level 3 | Z-TRANCHE Securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Securities available for sale	$ 0	$ 2,224
Level 3 | Z-TRANCHE Securities | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate		7.50%
Actual defaults (as a percent)		21.77%
Actual deferrals (as a percent)		10.44%
Level 3 | Z-TRANCHE Securities | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pretax discount rate		9.50%
Actual defaults (as a percent)		37.62%
Actual deferrals (as a percent)		26.29%
Level 3 | Z-TRANCHE Securities | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Actual defaults (as a percent)		33.11%
Actual deferrals (as a percent)		14.81%

Fair Value (Changes Level 3 ass

Fair Value (Changes Level 3 assets (fair value, recurring)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Purchases, acquired, sales and settlements:
Gains included in net gains on sale of loans held for sale	$ 3,828	$ 8,475
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,790	3,168	$ 3,168
Total gains (losses):
Included in earnings	1,062		(1,564)
Purchases, acquired, sales and settlements:
Issuances	382		5,373
Settlements	(489)		(4,187)
Balance at period end	3,745		2,790
Gains included in net gains on sale of loans held for sale	3,700		2,800
Z-TRANCHE Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,224	$ 2,039	2,039
Total gains (losses):
Included in earnings	2,810		0
Included in other comprehensive income	(2,166)		185
Purchases, acquired, sales and settlements:
Purchases	0		0
Sales	(2,868)		0
Settlements	0		0
Balance at period end	$ 0		$ 2,224

Fair Value (Estimated fair valu

Fair Value (Estimated fair value financial instruments (incl. carrying amounts)) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Securities:
Securities available for sale	$ 1,893,528	$ 1,845,864
Held to maturity	272,797	274,799
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	173,151	158,724
Time deposits in other financial institutions	41,539	2,105
Securities:
Securities available for sale	10,496	517
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	1,883,032	1,843,123
Held to maturity	272,797	274,799
Other investments	21,362	21,365
Loans held for sale	49,009	61,261
Loans, net	5,271,109	5,259,690
Derivative assets	3,278	3,222
Financial liabilities:
Short term borrowings	155,025	306,459
Other borrowings	282,346	288,534
Derivative liabilities	6,237	7,027
Significant Other Observable Inputs (Level 2) | Demand deposits
Financial liabilities:
Deposits	2,319,256	2,202,036
Significant Other Observable Inputs (Level 2) | Savings deposits
Financial liabilities:
Deposits	3,940,146	3,788,089
Significant Other Observable Inputs (Level 2) | Time deposits
Financial liabilities:
Deposits	830,459	857,286
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	176	2,546
Financial liabilities:
Derivative liabilities	634	266
Significant Other Observable Inputs (Level 2) | Commercial | Commercial
Securities:
Loans, net	1,270,138	1,257,071
Significant Other Observable Inputs (Level 2) | Commercial | Commercial real estate
Securities:
Loans, net	2,512,661	2,503,832
Significant Other Observable Inputs (Level 2) | Agricultural and agricultural real estate
Securities:
Loans, net	478,600	485,046
Significant Other Observable Inputs (Level 2) | Residential real estate
Securities:
Loans, net	589,159	600,668
Significant Other Observable Inputs (Level 2) | Consumer
Securities:
Loans, net	420,551	413,073
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	0	2,224
Held to maturity	0	0
Other investments	195	195
Loans held for sale	0	0
Loans, net	6,413	11,422
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	3,745	2,790
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	1,216	1,683
Significant Unobservable Inputs (Level 3) | Commercial | Commercial real estate
Securities:
Loans, net	1,490	3,026
Significant Unobservable Inputs (Level 3) | Agricultural and agricultural real estate
Securities:
Loans, net	534	1,955
Significant Unobservable Inputs (Level 3) | Residential real estate
Securities:
Loans, net	2,097	3,565
Significant Unobservable Inputs (Level 3) | Consumer
Securities:
Loans, net	1,076	1,193
Carrying Amount
Financial assets:
Cash and cash equivalents	173,151	158,724
Time deposits in other financial institutions	41,539	2,105
Securities:
Securities available for sale	1,893,528	1,845,864
Held to maturity	260,616	263,662
Other investments	21,557	21,560
Loans held for sale	49,009	61,261
Loans, net	5,306,605	5,297,395
Derivative assets	3,278	3,222
Financial liabilities:
Short term borrowings	155,025	306,459
Other borrowings	282,051	288,534
Derivative liabilities	6,237	7,027
Carrying Amount | Demand deposits
Financial liabilities:
Deposits	2,319,256	2,202,036
Carrying Amount | Savings deposits
Financial liabilities:
Deposits	3,940,146	3,788,089
Carrying Amount | Time deposits
Financial liabilities:
Deposits	830,459	857,286
Carrying Amount | Interest rate lock commitments
Securities:
Derivative assets	3,745	2,790
Carrying Amount | Forward commitments
Securities:
Derivative assets	176	2,546
Financial liabilities:
Derivative liabilities	634	266
Carrying Amount | Commercial | Commercial
Securities:
Loans, net	1,297,723	1,272,089
Carrying Amount | Commercial | Commercial real estate
Securities:
Loans, net	2,510,614	2,513,446
Carrying Amount | Agricultural and agricultural real estate
Securities:
Loans, net	477,867	485,820
Carrying Amount | Residential real estate
Securities:
Loans, net	601,314	614,207
Carrying Amount | Consumer
Securities:
Loans, net	419,087	411,833
Estimated Fair Value
Financial assets:
Cash and cash equivalents	173,151	158,724
Time deposits in other financial institutions	41,539	2,105
Securities:
Securities available for sale	1,893,528	1,845,864
Held to maturity	272,797	274,799
Other investments	21,557	21,560
Loans held for sale	49,009	61,261
Loans, net	5,277,522	5,271,112
Derivative assets	3,278	3,222
Financial liabilities:
Short term borrowings	155,025	306,459
Other borrowings	282,346	288,534
Derivative liabilities	6,237	7,027
Estimated Fair Value | Demand deposits
Financial liabilities:
Deposits	2,319,256	2,202,036
Estimated Fair Value | Savings deposits
Financial liabilities:
Deposits	3,940,146	3,788,089
Estimated Fair Value | Time deposits
Financial liabilities:
Deposits	830,459	857,286
Estimated Fair Value | Interest rate lock commitments
Securities:
Derivative assets	3,745	2,790
Estimated Fair Value | Forward commitments
Securities:
Derivative assets	176	2,546
Financial liabilities:
Derivative liabilities	634	266
Estimated Fair Value | Commercial | Commercial
Securities:
Loans, net	1,271,354	1,258,754
Estimated Fair Value | Commercial | Commercial real estate
Securities:
Loans, net	2,514,151	2,506,858
Estimated Fair Value | Agricultural and agricultural real estate
Securities:
Loans, net	479,134	487,001
Estimated Fair Value | Residential real estate
Securities:
Loans, net	591,256	604,233
Estimated Fair Value | Consumer
Securities:
Loans, net	$ 421,627	$ 414,266

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)segment	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting [Abstract]
Number of operating segments (segment) | segment	2
Segment Reporting Information [Line Items]
Net interest income	$ 73,028	$ 72,707
Provision for loan losses	3,641	2,067
Total noninterest income	25,893	29,578
Total noninterest expense	71,740	70,309
Income (loss) before taxes	23,540	29,909
Average Loans, for the period	5,365,654	5,358,102
Segment Assets, at period end	8,361,845	8,253,779	$ 8,247,079
Community and Other Banking
Segment Reporting Information [Line Items]
Net interest income	72,183	71,583
Provision for loan losses	3,641	2,067
Total noninterest income	19,034	18,537
Total noninterest expense	63,212	59,739
Income (loss) before taxes	24,364	28,314
Average Loans, for the period	5,334,659	5,296,191
Segment Assets, at period end	8,291,723	8,141,960
Retail Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income	845	1,124
Provision for loan losses	0	0
Total noninterest income	6,859	11,041
Total noninterest expense	8,528	10,570
Income (loss) before taxes	(824)	1,595
Average Loans, for the period	30,995	61,911
Segment Assets, at period end	$ 70,122	$ 111,819