QCR (QCRH) 10-K 12 Mar 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	QCR HOLDINGS INC
Entity Central Index Key	906,465
Trading Symbol	qcrh
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		13,931,628
Entity Public Float			$ 586,207,934
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Cash and due from banks		$ 75,721,663	$ 70,569,993
Federal funds sold		30,197,000	22,257,000
Interest-bearing deposits at financial institutions		55,765,012	63,948,925
Securities held to maturity, at amortized cost		379,474,205	322,909,056
Securities available for sale, at fair value		272,907,907	251,113,139
Total securities		652,382,112	574,022,195
Loans receivable, held for sale		645,001	1,135,500
Loans/leases receivable, held for investment		2,963,840,399	2,404,351,485
Gross loans/leases receivable		2,964,485,400	2,405,486,985
Less allowance for estimated losses on loans/leases		(34,355,728)	(30,757,448)
Net loans/leases receivable	[1]	2,930,129,672	2,374,729,537
Bank-owned life insurance		59,059,494	57,257,051
Premises and equipment, net		62,838,255	60,643,508
Restricted investment securities, at cost		19,782,525	14,997,025
Other real estate owned, net		13,558,308	5,523,104
Goodwill		28,334,092	13,110,913
Core deposit intangible		9,078,953	7,381,213
Other assets		45,817,687	37,503,284
Total assets		3,982,664,773	3,301,943,748
Liabilities and Stockholders' Equity
Noninterest-bearing		789,547,696	797,415,090
Interest-bearing		2,477,107,360	1,871,846,183
Total deposits		3,266,655,056	2,669,261,273
Short-term borrowings		13,993,122	39,971,387
Federal Home Loan Bank advances		192,000,000	137,500,000
Other borrowings		66,000,000	80,000,000
Junior subordinated debentures, net		37,486,487	33,480,202
Other liabilities		53,242,979	55,690,087
Total liabilities		3,629,377,644	3,015,902,949
Commitments and Contingencies
Stockholders' Equity:
Preferred stock, $1 par value; shares authorized 250,000 December 2017 and 2016 - No shares issued or outstanding
Common stock, $1 par value; shares authorized 20,000,000 December 2017 - 13,918,168 shares issued and outstanding December 2016 - 13,106,845 shares issued and outstanding		13,918,168	13,106,845
Additional paid-in capital		189,077,550	156,776,642
Retained earnings		151,962,661	118,616,901
Accumulated other comprehensive loss:
Securities available for sale		(866,223)	(1,527,433)
Interest rate cap derivatives		(805,027)	(932,156)
Total stockholders' equity		353,287,129	286,040,799
Total liabilities and stockholders' equity		$ 3,982,664,773	$ 3,301,943,748
[1]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized (in shares)	250,000	250,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, issued (in shares)	13,918,168	13,106,845
Common stock, outstanding (in shares)	13,918,168	13,106,845

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest and dividend income:
Loans/leases, including fees		$ 117,465,275	$ 91,235,049	$ 74,615,499
Securities:
Taxable		5,144,336	4,585,300	6,772,244
Nontaxable		11,253,351	9,686,844	7,782,370
Interest-bearing deposits at financial institutions		873,988	393,048	304,602
Restricted investment securities		631,049	522,047	503,764
Federal funds sold		149,319	45,447	24,774
Total interest and dividend income		135,517,318	106,467,735	90,003,253
Interest expense:
Deposits		13,011,906	6,018,366	4,495,538
Short-term borrowings		113,981	93,934	210,306
Federal Home Loan Bank advances		1,981,593	1,284,212	3,511,541
Other borrowings		2,878,879	3,317,513	4,233,193
Junior subordinated debentures		1,465,678	1,236,933	1,255,951
Total interest expense		19,452,037	11,950,958	13,706,529
Net interest income		116,065,281	94,516,777	76,296,724
Provision for loan/lease losses		8,469,919	7,478,166	6,870,900
Net interest income after provision for loan/lease losses		107,595,362	87,038,611	69,425,824
Noninterest income:
Trust department fees		7,187,820	6,164,137	6,131,209
Investment advisory and management fees		3,869,699	2,992,811	2,971,964
Deposit service fees		5,919,317	4,439,455	3,784,935
Gains on sales of residential real estate loans, net		408,655	431,313	322,872
Gains on sales of government guaranteed portions of loans, net		1,163,741	3,159,073	1,304,575
Swap fee income		3,094,939	1,708,204	1,717,552
Securities gains (losses), net		(87,885)	4,592,398	798,983
Earnings on bank-owned life insurance		1,802,443	1,771,396	1,762,107
Debit card fees		2,941,703	1,814,488	1,244,912
Correspondent banking fees		915,647	1,050,142	1,190,411
Other		3,266,213	2,913,458	3,133,801
Total noninterest income		30,482,292	31,036,875	24,363,321
Noninterest expenses:
Salaries and employee benefits		55,722,288	46,317,060	42,967,915
Occupancy and equipment expense		10,938,037	8,404,605	7,042,706
Professional and data processing fees		10,757,057	7,113,443	5,523,447
Acquisition costs		1,068,918	1,400,004
Post-acquisition compensation, transition and integration costs		4,309,565	1,041,169
FDIC insurance, other insurance and regulatory fees		2,752,270	2,549,314	2,724,968
Loan/lease expense		1,163,708	662,299	882,591
Net cost of (income from) operations of other real estate		1,599	591,303	(1,092,401)
Advertising and marketing		2,624,951	2,127,566	1,900,539
Bank service charges		1,770,942	1,692,957	1,486,265
Losses on debt extinguishment, net			4,577,668	7,185,601
Correspondent banking expense		807,077	750,646	703,495
CDI amortization		1,000,561	442,849	199,512
Other		4,507,724	3,815,028	3,667,384
Total noninterest expenses		97,424,697	81,485,912	73,192,022
Income before income taxes		40,652,957	36,589,574	20,597,123
Federal and state income tax expense		4,946,450	8,902,787	3,669,242
Net income		$ 35,706,507	$ 27,686,787	$ 16,927,881
Basic earnings per common share (in dollars per share)		$ 2.68	$ 2.20	$ 1.64
Diluted earnings per common share (in dollars per share)		$ 2.61	$ 2.17	$ 1.61
Weighted average common shares outstanding (in shares)	[1]	13,325,128	12,570,767	10,345,286
Weighted average common and common equivalent shares outstanding (in shares)		13,680,472	12,766,003	10,499,841
Cash dividends declared per common share (in dollars per share)		$ 0.20	$ 0.16	$ 0.08
[1]	The increase in weighted average common shares outstanding from 2015 to 2016 was primarily due to the common stock issuance that occurred in conjunction with the CSB acquisition.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 35,706,507	$ 27,686,787	$ 16,927,881
Other comprehensive income (loss):
Unrealized holding gains arising during the period before tax	1,257,289	4,258,154	1,144,314
Less reclassification adjustment for gains (losses) included in net income before tax	(87,885)	4,592,398	798,983
	1,345,174	(334,244)	345,331
Unrealized holding losses arising during the period before tax	(69,827)	(279,497)	(631,363)
Less reclassification adjustment for ineffectiveness and caplet amortization before tax	(484,891)	(75,290)	(15,895)
	415,064	(204,207)	(615,468)
Other comprehensive income (loss), before tax	1,760,238	(538,451)	(270,137)
Tax expense (benefit)	668,085	(202,691)	(81,524)
Other comprehensive income (loss), net of tax	1,092,153	(335,760)	(188,613)
Comprehensive income	$ 36,798,660	$ 27,351,027	$ 16,739,268

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2014	$ 8,074,443	$ 61,668,968	$ 77,876,824	$ (1,935,216)	$ (1,606,510)	$ 144,078,509
Net income			16,927,881			16,927,881
Other comprehensive loss, net of tax				(188,613)		(188,613)
Common cash dividends declared			(934,682)			(934,682)
Issuance of shares of common stock, net of issuance costs	3,680,000	59,804,123				63,484,123
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan	24,033	375,120				399,153
Issuance of shares of common stock as s result of stock options exercised	79,638	1,091,402				1,171,040
Stock-based compensation expense		941,469				941,469
Tax benefit of nonqualified stock options exercised		93,096				93,096
Retirement of treasury stock, 121,246 shares of common stock	(121,246)	(580,886)	(904,378)		1,606,510
Restricted stock awards - shares of common stock	28,846	(28,846)
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested	(4,631)	(81,595)				(86,226)
Balance at Dec. 31, 2015	11,761,083	123,282,851	92,965,645	(2,123,829)		225,885,750
Net income			27,686,787			27,686,787
Other comprehensive loss, net of tax				(335,760)		(335,760)
Common cash dividends declared			(2,035,531)			(2,035,531)
Issuance of shares of common stock, net of issuance costs	1,215,000	28,613,916				29,828,916
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan	20,192	417,336				437,528
Issuance of shares of common stock as s result of stock options exercised	111,423	1,556,823				1,668,246
Stock-based compensation expense		947,174				947,174
Tax benefit of nonqualified stock options exercised		394,149				394,149
Restricted stock awards - shares of common stock	21,882	(21,882)
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested	(22,735)	(546,140)				(568,875)
Tax basis adjustment related to the acquisition of noncontrolling interest in m2 Lease Funds		2,132,415				2,132,415
Balance at Dec. 31, 2016	13,106,845	156,776,642	118,616,901	(2,459,589)		286,040,799
Net income			35,706,507			35,706,507
Other comprehensive loss, net of tax				1,092,153		1,092,153
Common cash dividends declared			(2,664,561)			(2,664,561)
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan	13,318	454,822				468,140
Issuance of shares of common stock as s result of stock options exercised	114,100	1,611,338				1,725,438
Stock-based compensation expense		1,187,036				1,187,036
Restricted stock awards - shares of common stock	28,289	(28,289)
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested	(23,054)	(986,743)				(1,009,797)
Reclassification of certain tax effects from accumulated other comprehensive income			303,814	(303,814)
Issuance of 678,670 shares of common stock as a result of the acquisition of Guaranty Bank & Trust, net of issuance cost	678,670	30,062,744				30,741,414
Balance at Dec. 31, 2017	$ 13,918,168	$ 189,077,550	$ 151,962,661	$ (1,671,250)		$ 353,287,129

Consolidated Statements of Cha7

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retained Earnings [Member]
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.16	$ 0.08
Common Stock [Member]
Proceeds from issuance of common stock, net of issuance costs, shares (in shares)		1,215,000	3,680,000
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan (in shares)	13,318	20,192	24,033
Issuance of shares of common stock as s result of stock options exercised (in shares)	114,100	111,423	79,638
Retirement of treasury stock, shares of common stock (in shares)			121,246
Restricted stock awards (in shares)	28,289	21,882	28,846
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested (in shares)	23,054	22,735	4,631
Issuance of shares of common stock as a result of the acquisition of Guaranty Bank & Trust, net of issuance cost (in shares)	678,670
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.16	$ 0.08
Issuance of shares of common stock as s result of stock options exercised (in shares)	114,100	111,423	79,638

Consolidated Statements of Cash

Consolidated Statements of Cash Flows	12 Months Ended
	Dec. 31, 2017USD ($)		Dec. 31, 2016USD ($)		Dec. 31, 2015USD ($)
Cash Flows from Operating Activities:
Net income	$ 35,706,507		$ 27,686,787		$ 16,927,881
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	3,948,934		3,424,140		3,065,031
Provision for loan/lease losses	8,469,919		7,478,166		6,870,900
Deferred income taxes	(6,029,555)		(3,066,407)		(2,004,532)
Stock-based compensation expense	1,187,036		947,174		941,469
Deferred compensation expense accrued	1,425,717		1,171,406		1,023,827
Losses (gains) on sale of other real estate owned, net	(151,211)		243,858		(1,021,242)
Amortization of premiums on securities, net	1,839,196		1,302,962		1,040,275
Securities (gains) losses, net	87,885		(4,592,398)		(798,983)
Loans originated for sale	(49,578,773)		(74,329,667)		(38,748,100)
Proceeds on sales of loans	51,641,668		77,850,553		40,362,697
Gains on sales of residential real estate loans, net	(408,655)		(431,313)		(322,872)
Gains on sales of government guaranteed portions of loans, net	(1,163,741)		(3,159,073)		(1,304,575)
Losses on debt extinguishment, net			4,577,668		7,185,601
Amortization of core deposit intangible	1,000,561		442,849		199,512
Accretion of acquisition fair value adjustments, net	(5,040,873)		(3,718,160)		(367,009)
Increase in cash value of bank-owned life insurance	(1,802,443)		(1,771,396)		(1,762,107)
(Increase) decrease in other assets	826,449		(943,891)		(3,910,486)
Increase (decrease) in other liabilities	(8,245,340)		10,269,563		2,721,335
Net cash provided by operating activities	33,713,281		43,382,821		30,098,622
Cash Flows from Investing Activities:
Net decrease (increase) in federal funds sold	(7,940,000)		(1,709,000)		26,930,000
Net decrease (increase) in interest-bearing deposits at financial institutions	12,137,820		(12,904,803)		(979,283)
Proceeds from sales of other real estate owned	1,138,520		2,084,696		7,696,026
Activity in securities portfolio:
Purchases	(179,785,944)		(179,598,630)		(232,092,732)
Calls, maturities and redemptions	43,010,478		117,876,284		211,942,737
Paydowns	38,495,801		33,169,638		15,476,369
Sales	71,091,580		134,188,737		81,410,368
Activity in restricted investment securities:
Purchases	(4,824,000)		(1,098,200)		(3,752,450)
Redemptions	515,000		2,450,000		4,476,100
Net increase in loans/leases originated and held for investment	(375,226,301)		(187,496,180)		(172,786,032)
Purchase of premises and equipment	(5,760,802)		(6,032,416)		(4,394,255)
Net cash paid for acquisitions	(3,368,909)		(69,905,355)
Net cash used in investing activities	(410,516,757)		(168,975,229)		(66,073,152)
Cash Flows from Financing Activities:
Net increase in deposits	385,082,234		302,390,928		200,988,645
Net decrease in short-term borrowings	(39,080,308)		(104,691,329)		(123,688,954)
Activity in Federal Home Loan Bank advances:
Term advances	1,600,000				5,000,000
Calls and maturities	(8,000,000)		(24,000,000)		(26,000,000)
Net change in short-term and overnight advances	60,900,000		20,500,000		47,000,000
Prepayments	(4,108,027)		(31,008,668)		(84,401,601)
Activity in other borrowings:
Proceeds from other borrowings	7,000,000		35,000,000
Calls, maturities and scheduled principal payments	(21,000,000)				(7,350,000)
Prepayments			(69,769,000)		(34,559,000)
Retirement of junior subordinated debentures			(3,955,000)		(1,762,000)
Payment of cash dividends on common and preferred stock	(2,494,260)		(1,981,541)		(782,054)
Net cash provided by financing activities	381,955,146		154,420,080		39,481,832
Net increase in cash and due from banks	5,151,670		28,827,672		3,507,302
Cash and due from banks, beginning	70,569,993		41,742,321		38,235,019
Cash and due from banks, ending	75,721,663		70,569,993		41,742,321
Supplemental Disclosures of Cash Flow Information, cash payments for:
Interest	19,053,645		11,926,012		14,027,512
Income and franchise taxes	13,039,516		10,758,611		2,619,288
Supplemental Schedule of Noncash Investing and Financing Activities:
Change in accumulated other comprehensive income, unrealized gains (losses) on securities available for sale and derivative instruments, net	1,092,153		(335,760)		(188,613)
Exchange of shares of common stock in connection with payroll taxes for restricted stock and options exercised	(1,009,797)		(568,875)		(68,706)
Tax benefit of nonqualified stock options exercised			394,149		93,096
Transfers of loans to other real estate owned	9,022,514		51,000		1,577,060
Due to broker for purchases of securities			2,655,492
Tax basis adjustment related to the acquisition of noncontrolling interest in m2 Lease Funds			2,132,415
Increase (decrease) in the fair market value of interest rate swap assets and liabilities	2,058,957		(706,244)		1,568,548
Dividends payable	692,874		522,573		468,583
Fair value of assets acquired:
Cash and due from banks	4,434,511	[1]	10,094,645	[1]		[1]
Federal funds sold			698,000
Interest-bearing deposits at financial institutions	3,953,907		14,730,157
Securities	49,703,419		102,640,029
Loans receivable, net	192,517,677		419,029,277
Premises and equipment, net	4,808,343		20,684,880
Restricted investment securities	476,500		1,512,900
Other real estate owned			650,000
Core deposit intangible	2,698,301		6,352,653
Other assets	997,810		5,283,937
Total assets acquired	259,590,468		581,676,478
Fair value of liabilities assumed:
Deposits	212,467,514		486,298,262
Short-term borrowings	13,102,043
FHLB advances	4,108,027		20,368,877
Junior subordinated debentures	3,857,275
Other liabilities	2,595,883		4,897,564
Total liabilities assumed	236,130,742		511,564,703
Net assets acquired	23,459,726		70,111,775
Consideration paid:
Cash paid	7,803,420	[2]	80,000,000	[2]		[2]
Common stock	30,879,485
Total consideration paid	38,682,905		80,000,000
Goodwill	15,223,179		9,888,225
Common Stock Offering 1 [Member]
Activity in other borrowings:
Net proceeds from common stock offering			29,828,916		63,484,123
Common Stock Offering 2 [Member]
Activity in other borrowings:
Net proceeds from common stock offering	$ 2,055,507		$ 2,105,774		$ 1,552,673
[1]	Net cash paid at closing totaled $69,905,355
[2]	Net cash paid at closing totaled $69,905,355 for acquisition of CSB in 2016.

Note 1 - Nature of Business and

Note 1 - Nature of Business and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. Nature of Business and Significant Accounting Policies Basis of presentation : The acronyms and abbreviations identified below are used in the Notes to the Consolidated Financial Statements , as well as in the other sections of this Form 10 may Allowance: Allowance for estimated losses on loans/leases Goldman Sachs: Goldman Sachs and Company AOCI: Accumulated other comprehensive income (loss) HTM: Held to maturity AFS: Available for sale Iowa Superintendent: Iowa Superintendent of Banking ASC: Accounting Standards Codification LCR: Liquidity Coverage Ratio ASC 805: m2: m2 ASU: Accounting Standards Update MD&A: Management's Discussion & Analysis BHCA: Bank Holding Company Act of 1956 MSA: Metropolitan Statistical Area BOLI: Bank-owned life insurance NIM: Net interest margin Caps: Interest rate cap derivatives NPA: Nonperforming asset CFPB: Bureau of Consumer Financial Protection NPL: Nonperforming loan Community National: Community National Bancorporation NSFR: Net Stable Funding Ratio CNB: Community National Bank OREO: Other real estate owned CRA: Community Reinvestment Act OTTI: Other-than-temporary impairment CRBT: Cedar Rapids Bank & Trust Company PCAOB: Public Company Accounting Oversight Board CRE: Commercial real estate PCI: Purchased credit impaired CRE Guidance: Interagency Concentrations in Commercial Real Estate Provision: Provision for loan/lease losses Lending, Sound Risk Management Practices guidance PUD LOC: Public Unit Deposit Letter of Credit CSB: Community State Bank QCBT: Quad City Bank & Trust Company C&I: Commercial and industrial RB&T: Rockford Bank & Trust Company Dodd-Frank Act: Dodd-Frank Wall Street Reform and ROAA: Return on Average Assets Consumer Protection Act ROACE: Return on Average Common Equity IDFPR: Illinois Department of Financial & Professional Regulation ROAE: Return on Average Equity DGCL: Delaware General Corporation Law SBA: U.S. Small Business Administration DIF: Deposit Insurance Fund SBLF: Small Business Lending Fund EPS: Earnings per share SEC: Securities and Exchange Commission Exchange Act: Securities Exchange Act of 1934, SERPs: Supplemental Executive Retirement Plans FASB: Financial Accounting Standards Board TA: Tangible assets FDIC: Federal Deposit Insurance Corporation Tax Act: Tax Cuts and Jobs Act Federal Reserve: Board of Governors of the Federal Reserve System TCE: Tangible common equity FHLB: Federal Home Loan Bank TDRs: Troubled debt restructurings FICO: Financing Corporation TEY: Tax equivalent yield FRB: Federal Reserve Bank of Chicago The Company: QCR Holdings, Inc. FTEs: Full-time equivalents Treasury: U.S. Department of the Treasury GAAP: Generally Accepted Accounting Principles USA Patriot Act: Uniting and Strengthening America by Guaranty: Guaranty Bankshares, Ltd. Providing Appropriate Tools Required to Intercept and Guaranty Bank: Guaranty Bank and Trust Company Obstruct Terrorism Act of 2001 USDA: U.S. Department of Agriculture Nature of business : QCR Holdings, Inc. is a bank holding company that has elected to operate as a financial holding company under the BHCA. The Company provides bank and bank-related services through its banking subsidiaries, QCBT, CRBT, CSB and RB&T. The Company also engages in direct financing lease contracts through its wholly-owned equity investment by QCBT in m2, On October 1, 2017 . On December 2, 2017, On August 31, 2016, The financial results of the acquisitions of both Guaranty Bank and CSB for the periods since acquisition are included in this report. See Note 2 QCBT is a commercial bank that serves the Iowa and Illinois Quad Cities and adjacent communities. CRBT is a commercial bank that serves Cedar Rapids, Iowa, and adjacent communities including Cedar Falls and Waterloo, Iowa. CSB is a commercial bank that serves Des Moines, Iowa, and adjacent communities. RB&T is a commercial bank that serves Rockford, Illinois, and adjacent communities. QCBT , CRBT, and CSB are chartered and regulated by the state of Iowa, and RB&T is chartered and regulated by the state of Illinois. All four The remaining subsidiaries of the Company consist of six 12 Significant accounting policies: Accounting estimates : The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance, OTTI of securities, the fair value of financial instruments, and the fair value of assets acquired/liabilities assumed in a business combination. Principles of consolidation : The accompanying consolidated financial statements include the accounts of the Company and its subsidiaries, except those six not 12 Presentation of cash flows : For purposes of reporting cash flows, cash and due from banks include cash on hand and noninterest bearing amounts due from banks. Cash flows from federal funds sold, interest bearing deposits at financial institutions, loans/leases, deposits, and short-term borrowings are treated as net increases or decreases. Cash and due from banks : The subsidiary banks are required by federal banking regulations to maintain certain cash and due from bank reserves. The reserve requirement was approximately $41,803,000 $42,233,000 December 31, 2017 2016, Investment securities : Investment securities held to maturity are those debt securities that the Company has the ability and intent to hold until maturity regardless of changes in market conditions, liquidity needs, or changes in general economic conditions. Such securities are carried at cost adjusted for amortization of premiums and accretion of discounts. If the ability or intent to hold to maturity is not not All securities are evaluated to determine whether declines in fair value below their amortized cost are other-than-temporary. In estimating OTTI losses on AFS debt securities, management considers a number of factors including, but not 1 2 3 4 not not If the Company lacks the intent to sell the security, and it is not not Loans receivable , held for sale Loans receivable, held for investment : Loans that management has the intent and ability to hold for the foreseeable future, or until pay-off or maturity occurs, are classified as held for investment. These loans are stated at the amount of unpaid principal adjusted for charge-offs, the allowance, and any deferred fees and/or costs on originated loans. Interest is credited to earnings as earned based on the principal amount outstanding. Deferred direct loan origination fees and/or costs are amortized as an adjustment of the related loan’s yield. As assets held for and used in the production of services, the origination and collection of these loans are classified as investing activities in the statement of cash flows. The Company discloses the allowance for credit losses (also known as the allowance) by portfolio segment, and credit quality information, impaired financing receivables, nonaccrual status, and TDRs by class of financing receivable. A portfolio segment is the level at which the Company develops and documents a systematic methodology to determine its allowance for credit losses. A class of financing receivable is a further disaggregation of a portfolio segment based on risk characteristics and the Company’s method for monitoring and assessing credit risk. See the following information and Note 4. The Company ’s portfolio segments are as follows: ● C&I ● CRE ● Residential real estate ● Installment and other consumer Direct financing leases are considered a segment within the overall loan/lease portfolio. The Company’s classes of loans receivable are as follows: ● C&I ● Owner-occupied CRE ● Commercial construction, land development, and other land loans that are not CRE ● Other non-owner-occupied CRE ● Residential real estate ● Installment and other consumer Direct financing leases are considered a class of financing receivable within the overall loan/lease portfolio. The accounting policies for direct financing leases are disclosed below. Generally , for all classes of loans receivable, loans are considered past due when contractual payments are delinquent for 31 For al l classes of loans receivable, loans will generally be placed on nonaccrual status when the loan has become 90 ● It becomes evident that the borrower will not not ; ● When full repayment of principal and interest is not ; ● When the loan is graded “doubtful” ; ● When the borrower files bankruptcy and an approved plan of reorganization or liquidation is not ; or ● When foreclosure action is initiated. When a loan is placed on nonaccrual status, income recognition is ceased. Previously recorded but uncollected amounts of interest on nonaccrual loans are reversed at the time the loan is placed on nonaccrual status. Generally, cash collected on nonaccrual loans is applied to principal. Should full collection of principal be expected, cash collected on nonaccrual loans can be recognized as interest income. For all classes of loans receivable, nonaccrual loans may ● The loan is current, and all principal and interest amounts contractually due have been made ; ● All principal and interest amounts contractually due, including past due payments, are reasonabl y assured of repayment within a reasonable period; and ● There is a period of minimum repayment performance, as follows, by the borrower in accordance with contractual terms: ○ Six months of repayment performance for contractual monthly payments, or ○ One year of repayment performance for contractual quarterly or semi-annual payments . Direct finance leases receivable, held for investment : The Company leases machinery and equipment to customers under leases that qualify as direct financing leases for financial reporting and as operating leases for income tax purposes. Under the direct financing method of accounting, the minimum lease payments to be received under the lease contract, together with the estimated unguaranteed residual values (approximately 3% 25% Lease income is recognized on the interest method. Residual value is the estimated fair market value of the equipment on lease at lease termination. In estimating the equipment’s fair value at lease termination, the Company relies on historical experience by equipment type and manufacturer and, where available, valuations by independent appraisers, adjusted for known trends. The Company ’s estimates are reviewed continuously to ensure reasonableness; however, the amounts the Company will ultimately realize could differ from the estimated amounts. If the review results in a lower estimate than had been previously established, a determination is made as to whether the decline in estimated residual value is other-than-temporary. If the decline in estimated unguaranteed residual value is judged to be other-than-temporary, the accounting for the transaction is revised using the changed estimate. The resulting reduction in the investment is recognized as a loss in the period in which the estimate is changed. An upward adjustment of the estimated residual value is not T he policies for delinquency and nonaccrual for direct financing leases are materially consistent with those described above for all classes of loan receivables. The Company defers and amortizes fees and certain incremental direct costs over the contractual term of the lease as an adjustment to the yield. These initial direct leasing costs generally approximate 5.5% TDRs : TDRs exist when the Company, for economic or legal reasons related to the borrower’s/lessee’s financial difficulties, grants a concession (either imposed by court order, law, or agreement between the borrower/lessee and the Company) to the borrower/lessee that it would not The following criteria, related to granting a concession, together or separately, create a TDR: ● A modification of terms of a debt such as one ○ The reduction of the stated interest rate to a rate lower than the current market rate for new debt with similar risk. ○ The extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk. ○ The reduction of the face amount or maturity amount of the debt as stated in the instrument or other agreement. ○ The reduction of accrued interest. ● A transfer from the borrower /lessee to the Company of receivables from third ● The issuance or other granting of an equity position to the Company to fully or partially satisfy a debt unless the equity position is granted pursuant to existing terms for converting the debt into an equity position. Allowance : For all portfolio segments , the allowance is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans/leases in light of historical experience, the nature and volume of the loan/lease portfolio, adverse situations that may A discussion of the risk characteristics and the allowance by each portfolio segment follows: For C&I loans, the Company focuses on small and mid-sized businesses with primary operations as wholesalers, manufacturers, building contractors, business services companies, other banks, and retailers. The Company provides a wide range of C&I loans, including lines of credit for working capital and operational purposes, and term loans for the acquisition of facilities, equipment and other purposes. Approval is generally based on the following factors: ● Ability and stability of current management of the borrower; ● Stable earnings with positive financial trends; ● Sufficient cash flow to support debt repayment; ● Earnings projections based on reasonable assumptions; ● Financial strength of the industry and business; and ● Value and marketability of collateral. Collateral for C&I loans generally includes accounts receivable, inventory, equipment and real estate. The Company’s lending policy specifies approved collateral types and corresponding maximum advance percentages. The value of collateral pledged on loans must exceed the loan amount by a margin sufficient to absorb potential erosion of its value in the event of foreclosure and cover the loan amount plus costs incurred to convert it to cash. The Company’s lending policy specifies maximum term limits for C&I loans. For term loans, the maximum term is generally 7 3 5 365 In addition, the Company often takes personal guarantees or cosigners to help assure repayment. Loans may CRE loans are subject to underwriting standards and processes similar to C&I loans, in addition to those standards and processes specific to real estate loans. Collateral for CRE loans generally includes the underlying real estate and improvements, and may The Company’s lending policy also includes guidelines for real estate appraisals, including minimum appraisal standards based on certain transactions. In addition, the Company often takes personal guarantees to help assure repayment. In addition, management tracks the level of owner-occupied CRE loans versus non-owner occupied loans. Owner-occupied loans are generally considered to have less risk. As of December 31, 2017 2016, 26% 30%, The Company ’s lending policy incorporates regulatory guidelines which stipulate that non-owner occupied CRE lending in excess of 300% 100% December 31, 2017 2016, December 31, 2017, December 31, 2016. In some instances for all loans/leases, it may Company’s lending policy described above and below. In general, exceptions to the lending policy do not For C&I and CRE loans, the allowance consists of specific and general components. The specific component relates to loans that are classified as impaired , as defined below. For those loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan are lower than the carrying value of that loan. For C&I loans and all classes of CRE loans, a loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not The general component consists of quantitative and qualitative factors and covers non-impaired loans. The quantitative factors are based on historical charge-off experience and expected loss given default derived from the Company’s internal risk rating process. See below for a detailed description of the Company’s internal risk rating scale. The qualitative factors are determined based on an assessment of internal and/or external influences on credit quality that are not For C&I and CRE loans, the Company utilizes the following internal risk rating scale: 1 . Highest Quality (Pass) – loans of the highest quality with no 2 . Superior Quality (Pass) – loans with very strong credit quality. Borrowers have exceptionally strong earnings, liquidity, capital, cash flow coverage, and management ability. Includes loans secured by high quality marketable securities, certificates of deposit from other institutions, and cash value of life insurance. Also includes loans supported by U.S. government, state, or municipal guarantees. 3 . Satisfactory Quality (Pass) – loans with satisfactory credit quality. Established borrowers with satisfactory financial condition, including credit quality, earnings, liquidity, capital and cash flow coverage. Management is capable and experienced. Collateral coverage and guarantor support, if applicable, are more than adequate. Includes loans secured by personal assets and business assets, including equipment, accounts receivable, inventory, and real estate. 4 . Fair Quality (Pass) – loans with moderate but still acceptable credit quality. The primary repayment source remains adequate; however, management’s ability to maintain consistent profitability is unproven or uncertain. Borrowers exhibit acceptable leverage and liquidity. May 5 . Early Warning (Pass) – loans where the borrowers have generally performed as agreed, however unfavorable financial trends exist or are anticipated. Earnings may may may may 6 . Special Mention – loans where the borrowers exhibit credit weaknesses or unfavorable financial trends requiring close monitoring. Weaknesses and adverse trends are more pronounced than Early Warning loans, and if left uncorrected, may no not one 7 . Substandard – loans which are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if applicable. These loans have a well-defined weakness or weaknesses which jeopardize repayment according to the contractual terms. There is distinct loss potential if the weaknesses are not 8 . Doubtful – loans which have all the weaknesses inherent in a Substandard loan, with the added characteristic that existing weaknesses make full principal collection, on the basis of current facts, conditions and values, highly doubtful. The possibility of loss is extremely high, but because of pending factors, recognition of a loss is deferred until a more exact status can be determined. All doubtful loans will be placed on non-accrual, with all payments, including principal and interest, applied to principal reduction. The Company has certain loans risk-rated 7 not 7 not follow the same allowance methodology as it does for all other non-impaired, collectively evaluated loans. Rather, the Company performs a more detailed analysis including evaluation of the cash flow and collateral valuations. Based upon this evaluation, an estimate of the probable loss in this portfolio is collectively evaluated under ASC 450 20. 7 For term C&I and CRE loans greater than $1,000,000, 15 The Company’s Loan Quality area performs a documentation review of a sampling of C&I and CRE loans, the primary purpose of which is to ensure the credit is properly documented and closed in accordance with approval authorities and conditions. A review is also performed by the Company’s Internal Audit Department of a sampling of C&I and CRE loans for proper documentation, according to an approved schedule. Validation of the risk rating is also part of Internal Audit’s review (performed by Internal Loan Review). Additionally, over the past several years, the Company has contracted an independent outside third The Company leases machinery and equipment to C&I customers under direct financing leases. All lease requests are subject to the credit requirements and criteria as set forth in the lending/leasing policy. In all cases, a formal independent credit analysis of the lessee is performed. For direct financing leases, the allowance consists of specific and general components. The specific component relates to leases that are classified as impaired, as defined for commercial loans above. For those leases that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired lease is lower than the carrying value of that lease. The general component consists of quantitative and qualitative factors and covers nonimpaired leases. The quantitative factors are based on historical charge-off experience for the entire lease portfolio. The qualitative factors are determined based on an assessment of internal and/or external influences on credit quality that are not Generally, the Company’s residential real estate loans conform to the underwriting requirements of Freddie Mac and Fannie Mae to allow the subsidiary banks to resell loans in the secondary market. The subsidiary banks structure most loans that will not one five 15 not The Company provides many types of installment and other consumer loans including motor vehicle, home improvement, home equity, signature loans and small personal credit lines. The Company’s lending policy addresses specific credit guidelines by consumer loan type. For residential real estate loans, and installment and other consumer loans, these large groups of smaller balance homogenous loans are collectively evaluated for impairment. The Company applies a quantitative factor based on historical charge-off experience in total for each of these segments. Accordingly, the Company generally does not TDRs are considered impaired loans/leases and are subject to the same allowance methodology as described above for impaired loans/leases by portfolio segment. Once a loan is classified as a TDR, it will remain a TDR until the loan is paid off, charged off, moved to OREO or restructured into a new note without a concession. TDR status may Credit related financial instruments : In the ordinary course of business, the Company has entered into commitments to extend credit and standby letters of credit. Such financial instruments are recorded when they are funded. Transfers of financial assets : Transfers of financial assets are accounted for as sales only when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when: ( 1 2 no 3 not ● Pro-rata ownership in an entire financial asset . ● From the date of the transfer, all cash flows received from entire financial assets are divided proportionately among the participating interest holders in an amount equal to their share of ownership. ● The rights of each participating interest holder have the same priority, and no ’s interest is subordinated to the interest of another participating interest holder. That is, no ● No BOLI : BOLI is carried at cash surrender value with increases/decreases reflected as income/expense in the statement of income. Premises and equipment : Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed primarily by the straight-line method over the estimated useful lives of the assets. Restricted investment securities : Restricted investment securities represent FHLB and FRB common stock. The stock is carried at cost. These equity securities are “restricted” in that they can only be sold back to the respective institution or another member institution at par. Therefore, they are less liquid than other tradable equity securities. The Company views its investment in restricted stock as a long-term investment. Accordingly, when evaluating for impairment, the value is determined based on the ultimate recovery of the par value, rather than recognizing temporary declines in value. There have been no OREO : Real estate acquired through, or in lieu of, loan foreclosures, is held for sale and initially recorded at fair value less costs to sell, establishing a new cost basis. Any writedown to fair value taken at the time of foreclosure is charged to the allowance. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less costs to sell. Subsequent write-downs to fair value are charged to earnings. Repossessed assets : Equipment or other non-real estate property acquired through, or in lieu of foreclosure, is held for sale and initially recorded at fair value less costs to sell. Goodwill : The Company recorded goodwill totaling $3,222,688 80% m2 August 2005. $9,888,225 2016. not September 30, 2017, not $15,223,179 2017. 2 not 2018. Core deposit intangible : The Company has recorded a core deposit intangible from historical acquisitions including CNB, CSB and Guaranty Bank. The core deposit intangible was the portion of the acquisition purchase price which represented the value assigned to the existing deposit base at acquisition. See Notes 2 7 ten Swap transactions : The Company offers a loan swap program to certain commercial loan customers. Through this program, the Company originates a variable rate loan with the customer. The Company and the swap customer will then enter into a fixed interest rate swap. Lastly, an identical offsetting swap is entered into by the Company with a counterparty. These “back-to-back” swap arrangements are intended to offset each other and allow the Company to book a variable rate loan, while providing the customer with a contract for fixed interest payments. In these arrangements, the Company’s net cash flow is equal to the interest income received from the variable rate loan originated with the customer. These customer swaps are not $3.1 $1.7 $1.7 December 31, 2017, 2016 2015, Derivatives and hedging activities : The Company enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one one The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: ( 1 2 short-term fixed rate liabilities. Interest rate caps are valued by the transaction counterparty on a monthly basis and corroborated by a third ASC 815, Preferred stock : The Company currently has 250,000 none December 31, 2017 2016. Treasury s tock 2015. Stock-based compensation plans: The Company accounts for stock-based compensation with measurement of compensation cost for all stock-based awards at fair value on the grant date and recognition of compensation over the requisite service period for awards expected to vest. As discussed in Note 15, December 31, 2017, 2016, 2015, $1,187,035, $947,174 $941,469, The Company use s the Black-Scholes option pricing model to estimate the fair value of stock option grants with the following assumptions for the indicated periods: 2017 2016 201 5 Dividend yield 0.36% to 0.47% 0.35% to 0.51% 0.37% to 0.46% Expected volatilit y 29.64% to 29.95% 29.32% to 29.37% 28.92% to 29.32% Risk-free interest rate 2.50% to 2.81% 1.73% to 2.18% 1.89% to 2.37% Expected life of option grants (in years) 6 6 6 Weighted-average grant date fair value $14.75 $7.31 $5.11 The Compan y also uses the Black-Scholes option pricing model to estimate the fair value of stock purchase grants with the following assumptions for the indicated periods: 2017 2016 20 15 Dividend yield 0.37% to 0.42% 0.33% to 0.59% 0.37% to 0.45% Expect ed volatility 19.80% to 19.86% 12.70% to 15.60% 8.81% to 13.10% Risk-free interest rate 0.67% to 1.18% 0.39% to 0.57% 0.09% to .016% Expected life of purchase grants (in months) 3 to 6 3 to 6 3 to 6 Weighted-average grant date fair value $6.42 $3.28 $2.39 The fair value is amortized on a straight-line basis over the vesting periods of the grants and will be adjusted for subsequent changes in estimated forfeitures. The expected dividend yield assumption is based on the Company's current expectations about its anticipated dividend policy. Expected volatility is based on historical volatility of the Company's common stock price. The risk-free interest rate for periods within the contractual life of the option or purchase is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected life of the option and purchase grants is derived using the “simplified” method and represents the period of time that options and purchases are expected to be outstanding. Historical data is used to estimate forfeitures used in the model. Two separate groups of employees (employees subject to broad based grants, and executive employees and directors) are used. As of December 31, 2017, $961,972 1.92 The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company's common stock for the 495,004 December 31, 2017. December 31, 2017 $13.2 $10.5 December 31, 2017, 2016 2015, $1,055,193, $1,525,902, $480,354, Restricted stock awards granted may not not All restricted share awards are classified as equity awards. The grant-date fair value of equity-classified restricted stock awards is amortized as compensation expense on a straight-line basis over the period restrictions lapse. As of December 31, 2017, 1,210,425 2.60 Income taxes : The Company files its tax return on a consolidated basis with its subsidiaries. The entities follow the direct reimbursement method of accounting for income taxes under which income taxes or credits which result from the inclusion of the subsidiaries in the consolidated tax return are paid to or received from the parent company. Deferred income taxes are provided under the liability method whereby deferred tax assets are recognized for deductible temporary differences and net operating loss and tax credit carryforwards and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax basis. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not not ects of changes in tax laws and rates on the date of enactment. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not likely than not 50 Interest and penalties associated with unrecognized tax benefits are classified as additional income taxes in the statement s of income. Trust assets : Trust assets held by the subsidiary banks in a fiduciary, agency, or custodial capacity for their customers, other than cash on deposit at the subsidiary banks, are not not Earnings per share : See Note 17 Reclassifications : Certain amounts in the prior year financial statements have been reclassified, with no New accounting pronouncements: In May 2014, 2014 09, Revenue from Contracts with Customers 2014 09 2014 09 2014 09 January 1, 2017, 2015 14 2014 09 January 1, 2018 no In January 2016, 2016 01, Financial Instruments – Overall 2016 01 2016 01was January 1, 2018 no In February 2016, 2016 02, Leases 2016 02, 2016 02. 2016 02

Note 2 - Acquisitions

Note 2 - Acquisitions	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	2 . Acquisitions Guaranty Bank and Trust On October 1, 2017 five The acquisition of Guaranty Bank allowed the Company to grow its market share in the Cedar Rapids market. Guaranty Bank has a strong core deposit base and retail franchise. Although Guaranty already has strong earnings, the Company has identified several opportunities for enhanced future earnings performance. Lastly, financial metrics related to the transaction were favorable, as measured by EPS accretion, ROAA accretion and earn back of tangible book value dilution. In the acquisition, the Company acquired 100% ’s outstanding common stock and purchased certain assets and assumed certain liabilities of Guaranty for aggregate consideration consisting of 79% 678,670 21% $7.8 September 29, 2017, $45.50, $30.9 $38.7 To help fund the cash portion of the purchase price, on September 27, 2017, $7.0 four See further information in Note 11. December 31, 2017 The Company accounted for the business combination under the acquisition method of accounting in accordance with ASC 805. one The excess of the consideration paid over the fair value of the net assets acquired is recorded as goodwill. This goodwill is deductible over 15 The Company has several areas of specialization, including government guaranteed lending, C&I lending, interest rate swaps, leasing, wealth management, private banking and municipal bond offerings that will be offered in this expanded market, increasing future earnings potential. Guaranty Bank has a strong core deposit base. There is also value added to the Company through having an expanded footprint in a market that has strong growth potential. The experience and value of the personnel at Guaranty Bank and their knowledge of the expanded market is also beneficial. On December 2, 2017 , the Company merged Guaranty Bank with and into CRBT, with CRBT as the surviving bank. As part of the merger, the Guaranty Bank branches located at 302 3 rd 1819 42 nd $3.6 December 31, 2017 three The fair values of the assets acquired and liabilities assumed including the consideration paid and resulting goodwill is as follows: As of October 1, 2017 ASSETS Cash and due from banks $ 4,434,511 Interest-bearing deposits at financial institutions 3,953,907 Securities 49,703,419 Loans/leases receivable, net 192,517,677 Premises and equipment 4,808,343 Restricted investment securities 476,500 Core deposit intangible 2,698,301 Other assets 997,810 Total assets acquired $ 259,590,468 LIABILITIES Deposits $ 212,467,514 Short-term borrowings 13,102,043 FHLB advances 4,108,027 Junior subordinated debentures 3,857,275 Other liabilities 2,595,883 Total liabilities assumed 236,130,742 Net assets acquired $ 23,459,726 CONSIDERATION PAID: Cash $ 7,803,420 Common stock 30,879,485 Total consideration paid 38,682,905 Goodwill $ 15,223,179 Loans acquired in a business combination are recorded and initially measured at their estimated fair value as of the acquisition date. Credit discounts are included in the determination of fair value. A third Purchased loans are segregated into two 310 30, 310 20, not For PCI loans, the difference between the contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable discount. Further, any excess cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the expected remaining life of the loan. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. The present value of any decreases in expected cash flows after the purchase date is recognized by recording an allowance for loan and lease losses and provision for loan losses. For performing loans, the difference between the estimated fair value of the loans and the principal balance outstanding is accreted over the remaining life of the loans The following table presents the purchased loans as of the acquisition date: PCI Performing Loans Loans Total Contractually required principal payments $ 3,126,327 $ 192,982,439 $ 196,108,766 Nonaccretable discount (1,147,198 ) - (1,147,198 ) Principal cash flows expected to be collected 1,979,129 192,982,439 194,961,568 Accretable discount (219,902 ) (2,223,989 ) (2,443,891 ) Fair Value of acquired loans $ 1,759,227 $ 190,758,450 $ 192,517,677 Changes in accretable yield for the loans acquired are as follows: For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (219,902 ) (2,223,989 ) (2,443,891 ) Accretion recognized 54,070 26,836 80,906 Balance at the end of the period $ (165,832 ) $ (2,197,153 ) $ (2,362,985 ) During 2017, $158 Premises and equipment acquired with a fair value of $ 4,808,343 five $4,614,604, $998,343. third 39 The Company recorded a core deposit intangible totaling $ 2,698,301 ten 6 During the current year, the Company incurred $1.1 2017, $3.1 Unaudited pro forma combined operating results for the years ended December 31, 2017 2016, January 1, 2016, Year Ended December 31, 2017 2016 (dollars in thousands, except per share data) Net interest income $ 122,923 $ 102,902 Noninterest income $ 32,703 $ 34,238 Net income $ 38,728 $ 27,103 Earnings per common share: Basic $ 2.80 $ 2.05 Diluted $ 2.73 $ 2.02 The pro forma results do not January 1, 2016 C ommunity State Bank On August 31, 2016, ten 100% $80.0 The acquisition of CSB allowed the Company to expand its footprint into the Des Moines market. CSB has an experienced and capable leadership team that is committed to leading the Company ’s efforts in the Des Moines area. CSB has demonstrated significant improvement in earnings and asset quality during the last three $581 not In connection with the acquisition, during the second 2016, 1,215,000 $24.75 $29.8 May 23, 2016. Cash received from the common stock offering was used to help finance the purchase price of the acquisition. Additionally, the Company drew $5.0 $10.0 $30.0 11 $15.2 The Company accounted for the business combination under the acquisition method of accounting in accordance with ASC 805. The excess of the consideration paid over the fair value of the net assets acquired is recorded as goodwill. This goodwill is not The Company has several areas of specialization, including government guaranteed lending, C&I lending, interest rate swaps, leasing, wealth management, private banking and municipal bond offerings that will be offered in this new market, increasing future earnings potential. There is also value added to the Company through having a footprint in a market that has strong growth potential. Additionally, there are qualitative benefits gained through the addition of a new charter including better leverage of centralized operations and increased lending limits. The experience and value of the personnel at CSB and their knowledge of the Des Moines MSA is also beneficial. The fair values of the assets acquired and liabilities assumed including the consideration paid and resulting goodwill is as follows: As of August 31, 2016 ASSETS Cash and due from banks $ 10,094,645 Federal funds sold 698,000 Interest-bearing deposits at financial institutions 14,730,157 Securities 102,640,029 Loans/leases receivable, net 419,029,277 Premises and equipment 20,684,880 Core deposit intangible 6,352,653 Restricted investment securities 1,512,900 Other real estate owned 650,000 Other assets 5,283,937 Total assets acquired $ 581,676,478 LIABILITIES Deposits $ 486,298,262 FHLB advances 20,368,877 Other liabilities 4,897,564 Total liabilities assumed $ 511,564,703 Net assets acquired $ 70,111,775 CONSIDERATION PAID: Cash $ 80,000,000 Total consideration paid $ 80,000,000 Goodwill $ 9,888,225 Loans acquired in a business combination are recorded and initially measured at their estimated fair value as of the acquisition date. Credit discounts are included in the determination of fair value. A third Purchased loans are segregated into two 310 30, 310 20, not For PCI loans, the difference between the contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable discount. Further, any excess cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the expected remaining life of the loan. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. The present value of any decreases in expected cash flows after the purchase date is recognized by recording an allowance for loan and lease losses and provision for loan losses. For performing loans, the difference between the estimated fair value of the loans and the principal balance outstanding is accreted over the remaining life of the loans. The following table presents the purchased loans as of the acquisition date: PCI Performing Loans Loans Total Contractually required principal payments $ 8,349,688 $ 427,398,400 $ 435,748,088 Nonaccretable discount (4,525,223 ) - (4,525,223 ) Principal cash flows expected to be collected $ 3,824,465 $ 427,398,400 $ 431,222,865 Accretable discount (277,579 ) (11,916,009 ) (12,193,588 ) Fair Value of acquired loans $ 3,546,886 $ 415,482,391 $ 419,029,277 Changes in accretable yield for the loans acquired are as follows: For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) Accretion recognized 169,006 5,032,692 5,201,698 Balance at the end of the period $ (25,300 ) $ (4,082,922 ) $ (4,108,222 ) For the year ended December 31, 2016 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (277,579 ) (11,916,009 ) (12,193,588 ) Accretion recognized 83,273 2,800,395 2,883,668 Balance at the end of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) During 2017 2016, $198 $186 Premises and equipment acquired with a fair value of $20,684,880 ten $19,735,000, $8,334,437. third buildings and building write-ups will be recognized in depreciation expense over 39 The Company recorded a core deposit intangible totaling $6,352,653 ten See Note 6 During 2016, $1.4 2016, $1.0 August 31, 2016 December 31, 2016, $11.4 $2.1 $473 During the current year, the Company incurred $1.2 Unaudited pro forma combined operating results for the years ended December 31, 2016 2015, January 1, 2015, Year Ended December 31, 2016 2015 (dollars in thousands, except per share data) Net interest income $ 110,035 $ 98,483 Noninterest income $ 34,773 $ 31,051 Net income $ 34,137 $ 22,118 Earnings per common share: Basic $ 2.62 $ 1.91 Diluted $ 2.58 $ 1.89 The pro forma results do not January 1, 2015

Note 3 - Investment Securities

Note 3 - Investment Securities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Investment Holdings [Text Block]	3. The amortized cost and fair value of investment securities as of December 31, 2017 2016 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains (Losses) Value December 31, 2017: Securities held to maturity: Municipal securities $ 378,424,205 $ 2,763,718 $ (2,488,119 ) $ 378,699,804 Other securities 1,050,000 - - 1,050,000 $ 379,474,205 $ 2,763,718 $ (2,488,119 ) $ 379,749,804 Securities available for sale: U.S. govt. sponsored agency securities $ 38,409,157 $ 37,344 $ (349,967 ) $ 38,096,534 Residential mortgage-backed and related securities 165,459,470 155,363 (2,313,529 ) 163,301,304 Municipal securities 66,176,364 660,232 (211,100 ) 66,625,496 Other securities 4,014,004 896,384 (25,815 ) 4,884,573 $ 274,058,995 $ 1,749,323 $ (2,900,411 ) $ 272,907,907 December 31, 2016: Securities held to maturity: Municipal securities $ 321,859,056 $ 2,200,577 $ (4,694,734 ) $ 319,364,899 Other securities 1,050,000 - - 1,050,000 $ 322,909,056 $ 2,200,577 $ (4,694,734 ) $ 320,414,899 Securities available for sale: U.S. govt. sponsored agency securities $ 46,281,306 $ 132,886 $ (330,585 ) $ 46,083,607 Residential mortgage-backed and related securities 150,465,222 174,993 (2,938,088 ) 147,702,127 Municipal securities 52,816,541 425,801 (637,916 ) 52,604,426 Other securities 4,046,332 703,978 (27,331 ) 4,722,979 $ 253,609,401 $ 1,437,658 $ (3,933,920 ) $ 251,113,139 The Company ’s HTM municipal securities consist largely of private issues of municipal debt. The municipalities are located primarily within the Midwest. The municipal debt investments are underwritten using specific guidelines with ongoing monitoring. The Company ’s residential mortgage-backed and related securities portfolio consists entirely of government sponsored or government guaranteed securities. The Company has not Gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of December 31, 2017 2016, Less than 12 Months 12 Months or More Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses December 31, 2017: Securities held to maturity: Municipal securities $ 23,750,826 $ (354,460 ) $ 72,611,780 $ (2,133,659 ) $ 96,362,606 $ (2,488,119 ) Securities available for sale: U.S. govt. sponsored agency securities $ 28,576,258 $ (200,022 ) $ 3,640,477 $ (149,945 ) $ 32,216,735 $ (349,967 ) Residential mortgage-backed and related securities 88,927,779 (871,855 ) 57,931,731 (1,441,674 ) 146,859,510 (2,313,529 ) Municipal securities 10,229,337 (41,151 ) 9,997,433 (169,949 ) 20,226,770 (211,100 ) Other securities 923,535 (25,815 ) - - 923,535 (25,815 ) $ 128,656,909 $ (1,138,843 ) $ 71,569,641 $ (1,761,568 ) $ 200,226,550 $ (2,900,411 ) December 31, 2016: Securities held to maturity: Municipal securities $ 122,271,533 $ (4,076,647 ) $ 13,010,803 $ (618,087 ) $ 135,282,336 $ (4,694,734 ) Securities available for sale: U.S. govt. sponsored agency securities $ 21,788,139 $ (257,640 ) $ 5,499,012 $ (72,945 ) $ 27,287,151 $ (330,585 ) Residential mortgage-backed and related securities 121,506,582 (2,641,664 ) 7,437,615 (296,424 ) 128,944,197 (2,938,088 ) Municipal securities 34,152,822 (618,462 ) 338,099 (19,454 ) 34,490,921 (637,916 ) Other securities 3,177,414 (27,331 ) - - 3,177,414 (27,331 ) $ 180,624,957 $ (3,545,097 ) $ 13,274,726 $ (388,823 ) $ 193,899,683 $ (3,933,920 ) At December 31, 2017, 613 223 0.8% 223 110 12 not not December 31, 2017 2016, 1% T he Company did not December 31, 2017, 2016 2015. All sales of securities for the years ended December 31, 2017, 2016 2015, 2017 2016 2015 Proceeds from sales of securities $ 71,091,580 $ 134,188,737 $ 81,410,368 Gross gains from sales of securities 67,351 4,845,009 1,045,444 Gross losses from sales of securities (155,236 ) (252,611 ) (246,461 ) In September 2016, $4,010,877. no 2002. The amortized cost and fair value of securities as of December 31, 2017, may may not no for those securities. Amortized Cost Fair Value Securities held to maturity: Due in one year or less $ 2,912,158 $ 2,909,816 Due after one year through five years 20,838,734 20,896,388 Due after five years 355,723,313 355,943,600 $ 379,474,205 $ 379,749,804 Securities available for sale: Due in one year or less $ 1,991,755 $ 1,996,584 Due after one year through five years 26,984,843 26,986,584 Due after five years 75,608,923 75,738,862 $ 104,585,521 $ 104,722,030 Residential mortgage-backed and related securities 165,459,470 163,301,304 Other securities 4,014,004 4,884,573 $ 274,058,995 $ 272,907,907 P ortions of the U.S. government sponsored agencies and municipal securities contain call options, at the discretion of the issuer, to terminate the security at predetermined dates prior to the stated maturity, summarized as follows: Amortized Cost Fair Value Securities held to maturity: Municipal securities $ 208,103,672 $ 208,961,233 Securities available for sale: U.S. govt. sponsored agency securities 5,048,756 4,988,073 Municipal securities 57,554,280 57,817,498 $ 62,603,036 $ 62,805,571 As of December 31, 2017 2016, $78,642,843 $118,811,905, As of December 31, 2017, 131 $108.0 145 $337.3 26 6 $5.0 16 7 $5.0 As of December 31, 2016, 116 $116.5 120 $255.5 21 5 $5.0 12 6 $5.0 The amortized cost and fair values of the Company ’s portfolio of general obligation bonds are summarized in the following tables by the issuer’s state: December 31, 2017: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 20 $ 19,328,700 $ 19,514,024 $ 975,701 Iowa 16 13,881,689 13,969,512 873,095 Missouri 17 9,243,355 9,308,287 547,546 North Dakota 7 21,626,574 21,724,197 3,103,457 Ohio 9 8,002,705 7,938,028 882,003 Texas 17 11,253,775 11,308,848 665,226 Other 45 24,000,278 24,215,119 538,114 Total general obligation bonds 131 $ 107,337,076 $ 107,978,015 $ 824,260 December 31, 2016: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 19 $ 29,214,559 $ 29,308,438 $ 1,542,549 Iowa 27 32,258,612 32,231,936 1,193,775 Missouri 14 8,291,192 8,323,245 594,518 North Dakota 7 22,169,050 21,499,075 3,071,296 Ohio 8 6,790,398 6,651,897 831,487 Other 41 18,481,496 18,458,044 450,196 Total general obligation bonds 116 $ 117,205,307 $ 116,472,635 $ 1,004,074 The amortized cost and fair values of the Company ’s portfolio of revenue bonds are summarized in the following tables by the issuer’s state: December 31, 2017: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 2 $ 17,211,441 $ 17,408,544 $ 8,704,272 Indiana 26 51,171,818 50,861,336 1,956,205 Iowa 29 68,724,899 69,079,470 2,382,051 Kansas 6 12,873,329 12,877,087 2,146,181 Missouri 56 106,259,015 106,232,837 1,897,015 North Dakota 5 11,451,560 11,351,676 2,270,335 Ohio 10 55,766,091 55,820,203 5,582,020 Other 11 13,805,340 13,716,132 1,246,921 Total revenue bonds 145 $ 337,263,493 $ 337,347,285 $ 2,326,533 December 31, 2016: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Indiana 22 $ 47,994,737 $ 47,582,138 $ 2,162,824 Iowa 31 70,788,393 71,142,393 2,294,916 Kansas 6 13,476,366 13,427,491 2,237,915 Missouri 47 90,784,441 89,664,013 1,907,745 North Dakota 4 8,089,067 7,796,381 1,949,095 Ohio 3 13,650,000 13,405,222 4,468,407 Other 7 12,687,286 12,479,052 1,782,722 Total revenue bonds 120 $ 257,470,290 $ 255,496,690 $ 2,129,139 As of December 31, 2017 2016, not 5% 2, The Company ’s municipal securities are owned by each of the four December 31, 2017, As of December 31, 2017, not

Note 4 - Loans Leases Receivabl

Note 4 - Loans Leases Receivable	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Financing Receivables [Text Block]	4. The composition of the loan/lease portfolio as of December 31, 2017 2016 2017 2016 C&I loans $ 1,134,516,315 $ 827,637,263 CRE loans Owner-occupied CRE 332,742,477 332,387,621 Commercial construction, land development, and other land 186,402,404 165,149,491 Other non owner-occupied CRE 784,347,000 595,921,748 1,303,491,882 1,093,458,860 Direct financing leases * 141,448,232 165,419,360 Residential real estate loans ** 258,646,265 229,233,104 Installment and other consumer loans 118,610,799 81,665,695 2,956,713,493 2,397,414,282 Plus deferred loan/lease origination costs, net of fees 7,771,907 8,072,703 2,964,485,400 2,405,486,985 Less allowance (34,355,728 ) (30,757,448 ) $ 2,930,129,672 $ 2,374,729,537 * Direct financing leases: Net minimum lease payments to be received $ 156,583,887 $ 184,274,802 Estimated unguaranteed residual values of leased assets 929,932 1,085,154 Unearned lease/residual income (16,065,587 ) (19,940,596 ) 141,448,232 165,419,360 Plus deferred lease origination costs, net of fees 4,624,027 5,881,778 146,072,259 171,301,138 Less allowance (2,382,098 ) (3,111,898 ) $ 143,690,161 $ 168,189,240 Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors and management ’s expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. At December 31, 2017, 10 $929,932 not December 31, 2016, 13 $1,085,164 not no December 31, 2017, 2016, 2015. * *Includes residential real estate loans held for sale totaling $645,001 $1,135,500 December 31, 2017 2016, Changes in accretable yield for the loans acquired in the CSB and Guaranty Bank acquisitions are as follows: For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) Discount added at acquisition (219,902 ) (2,223,989 ) (2,443,891 ) Accretion recognized 223,076 5,059,528 5,282,604 Balance at the end of the period $ (191,132 ) $ (6,280,075 ) $ (6,471,207 ) For the year ended December 31, 2016 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (277,579 ) (11,916,009 ) (12,193,588 ) Accretion recognized 83,273 2,800,395 2,883,668 Balance at the end of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) The aging of the loan/lease portfolio by classes of loan s/leases as of December 31, 2017 2016 2017 Classes of Loans/Leases Current 30-59 Days Past Due 60-89 Days Past Due Accruing Past Due 90 Days or More Nonaccrual Loans/Leases Total C&I $ 1,124,734,486 $ 8,306,829 $ 243,647 $ - $ 1,231,353 $ 1,134,516,315 CRE Owner-Occupied CRE 331,868,142 540,435 - - 333,900 332,742,477 Commercial Construction, Land Development, and Other Land 181,558,092 - - - 4,844,312 186,402,404 Other Non Owner-Occupied CRE 782,526,249 572,877 4,146 - 1,243,728 784,347,000 Direct Financing Leases 137,708,397 1,305,191 259,600 - 2,175,044 141,448,232 Residential Real Estate 253,261,821 3,552,709 393,410 74,519 1,363,806 258,646,265 Installment and Other Consumer 117,773,259 517,537 56,760 14,152 249,091 118,610,799 $ 2,929,430,446 $ 14,795,578 $ 957,563 $ 88,671 $ 11,441,234 $ 2,956,713,493 As a percentage of total loan/lease portfolio 99.08 % 0.50 % 0.03 % 0.00 % 0.39 % 100.00 % 2016 Classes of Loans/Leases Current 30-59 Days Past Due 60-89 Days Past Due Accruing Past Due 90 Days or More Nonaccrual Loans/Leases Total C&I $ 821,637,507 $ 1,455,185 $ 10,551 $ 346,234 $ 4,187,786 $ 827,637,263 CRE Owner-Occupied CRE 331,812,571 - 242,902 - 332,148 332,387,621 Commercial Construction, Land Development, and Other Land 160,760,034 35,638 - - 4,353,819 165,149,491 Other Non Owner-Occupied CRE 594,384,926 100,673 - - 1,436,149 595,921,748 Direct Financing Leases 161,452,627 730,627 574,700 215,225 2,446,181 165,419,360 Residential Real Estate 227,023,552 473,478 365,581 294,854 1,075,639 229,233,104 Installment and Other Consumer 81,199,766 204,973 63,111 110,501 87,344 81,665,695 $ 2,378,270,983 $ 3,000,574 $ 1,256,845 $ 966,814 $ 13,919,066 $ 2,397,414,282 As a percentage of total loan/lease portfolio 99.20 % 0.13 % 0.05 % 0.04 % 0.58 % 100.00 % NPLs by classes of loans/leases as of December 31, 2017 2016 2017 Classes of Loans/Leases Accruing Past Due 90 Days or More Nonaccrual Loans/Leases * Accruing TDRs Total NPLs Percentage of Total NPLs C&I $ - $ 1,231,353 $ 5,224,182 $ 6,455,535 34.63 % CRE Owner-Occupied CRE - 333,900 107,322 441,222 2.37 % Commercial Construction, Land Development, and Other Land - 4,844,312 - 4,844,312 25.99 % Other Non Owner-Occupied CRE - 1,243,728 - 1,243,728 6.67 % Direct Financing Leases - 2,175,044 1,494,448 3,669,492 19.68 % Residential Real Estate 74,519 1,363,806 272,493 1,710,818 9.18 % Installment and Other Consumer 14,152 249,091 14,027 277,270 1.49 % $ 88,671 $ 11,441,234 $ 7,112,472 $ 18,642,377 100.00 % * At December 31, 2017, $2,282,495 $122,598 $1,336,871 $700,255 $115,190 $7,581 2016 Classes of Loans/Leases Accruing Past Due 90 Days or More Nonaccrual Loans/Leases ** Accruing TDRs Total NPLs Percentage of Total NPLs C&I $ 346,234 $ 4,187,786 $ 4,733,997 $ 9,268,017 43.65 % CRE Owner-Occupied CRE - 332,148 - 332,148 1.56 % Commercial Construction, Land Development, and Other Land - 4,353,819 - 4,353,819 20.51 % Other Non Owner-Occupied CRE - 1,436,149 - 1,436,149 6.77 % Direct Financing Leases 215,225 2,446,181 1,008,244 3,669,650 17.28 % Residential Real Estate 294,854 1,075,639 585,541 1,956,034 9.21 % Installment and Other Consumer 110,501 87,344 18,746 216,591 1.02 % $ 966,814 $ 13,919,066 $ 6,346,528 $ 21,232,408 100.00 % * * At December 31, 2016, $2,300,479 $48,501 $1,380,047 $816,149 $43,579 $12,203 Changes in the allowance by portfolio segment for the years ended December 31, 2017, 2016, 2015 Year Ended December 31, 2017 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Provisions charged to expense 2,736,296 4,044,460 1,369,624 197,034 122,505 8,469,919 Loans/leases charged off (1,149,790 ) (1,795,229 ) (2,284,910 ) (102,088 ) (41,196 ) (5,373,213 ) Recoveries on loans/leases previously charged off 191,420 42,848 185,486 29,141 52,679 501,574 Balance, ending $ 14,323,036 $ 13,962,688 $ 2,382,098 $ 2,466,431 $ 1,221,475 $ 34,355,728 Year Ended December 31, 2016 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 10,484,080 $ 9,375,117 $ 3,395,088 $ 1,790,150 $ 1,096,471 $ 26,140,906 Provisions (credits) charged to expense 2,478,912 2,286,953 2,127,463 628,114 (43,276 ) 7,478,166 Loans/leases charged off (527,152 ) (24,304 ) (2,503,417 ) (76,820 ) (112,490 ) (3,244,183 ) Recoveries on loans/leases previously charged off 109,270 32,843 92,764 900 146,782 382,559 Balance, ending $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Year Ended December 31, 2015 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 8,833,832 $ 8,353,386 $ 3,359,400 $ 1,525,952 $ 1,001,795 $ 23,074,365 Provisions charged to expense 1,470,526 3,080,611 1,688,031 430,087 201,645 6,870,900 Loans/leases charged off (453,782 ) (2,560,749 ) (1,788,772 ) (169,996 ) (251,838 ) (5,225,137 ) Recoveries on loans/leases previously charged off 633,504 501,869 136,429 4,107 144,869 1,420,778 Balance, ending $ 10,484,080 $ 9,375,117 $ 3,395,088 $ 1,790,150 $ 1,096,471 $ 26,140,906 The allowance by impairment evaluation and by portfolio segment as of December 31, 2017 2016 2017 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Allowance for impaired loans/leases $ 715,627 $ 1,429,460 $ 504,469 $ 355,167 $ 38,596 $ 3,043,319 Allowance for nonimpaired loans/leases 13,607,409 12,533,228 1,877,629 2,111,264 1,182,879 31,312,409 $ 14,323,036 $ 13,962,688 $ 2,382,098 $ 2,466,431 $ 1,221,475 $ 34,355,728 Impaired loans/leases $ 6,248,209 $ 6,529,262 $ 3,669,492 $ 1,704,846 $ 202,354 $ 18,354,163 Nonimpaired loans/leases 1,128,268,106 1,296,962,620 137,778,740 256,941,419 118,408,445 2,938,359,330 $ 1,134,516,315 $ 1,303,491,882 $ 141,448,232 $ 258,646,265 $ 118,610,799 $ 2,956,713,493 Allowance as a percentage of impaired loans/leases 11.45 % 21.89 % 13.75 % 20.83 % 19.07 % 16.58 % Allowance as a percentage of nonimpaired loans/leases 1.21 % 0.97 % 1.36 % 0.82 % 1.00 % 1.07 % Total allowance as a percentage of total loans/leases 1.26 % 1.07 % 1.68 % 0.95 % 1.03 % 1.16 % 2016 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Allowance for impaired loans/leases $ 1,771,537 $ 693,919 $ 848,919 $ 289,112 $ 39,481 $ 3,642,968 Allowance for nonimpaired loans/leases 10,773,573 10,976,690 2,262,979 2,053,232 1,048,006 27,114,480 $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Impaired loans/leases $ 8,936,451 $ 6,112,114 $ 3,256,264 $ 1,661,180 $ 106,090 $ 20,072,099 Nonimpaired loans/leases 818,700,812 1,087,346,746 162,163,096 227,571,924 81,559,605 2,377,342,183 $ 827,637,263 $ 1,093,458,860 $ 165,419,360 $ 229,233,104 $ 81,665,695 $ 2,397,414,282 Allowance as a percentage of impaired loans/leases 19.82 % 11.35 % 26.07 % 17.40 % 37.21 % 18.15 % Allowance as a percentage of nonimpaired loans/leases 1.32 % 1.01 % 1.40 % 0.90 % 1.28 % 1.14 % Total allowance as a percentage of total loans/leases 1.52 % 1.07 % 1.88 % 1.02 % 1.33 % 1.28 % Information for impaired loans/leases is presented in the tables below. The recorded investment represents customer balances net of any partial charge-offs recognized on the loan/lease. The unpaid principal balance represents the recorded balance outstanding on the loan/lease prior to any partial charge-offs. Loans/leases, by classes of financing receivable, considered to be impaired as of and for the years ended December 31, 2017, 2016, 2015 2017 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 1,634,269 $ 1,644,706 $ - $ 1,406,310 $ 71,183 $ 71,183 CRE Owner-Occupied CRE 289,261 289,261 - 79,317 11,902 11,902 Commercial Construction, Land Development, and Other Land - - - - - - Other Non Owner-Occupied CRE 1,171,565 1,171,565 - 1,176,738 - - Direct Financing Leases 2,944,540 2,944,540 - 2,879,695 132,167 132,167 Residential Real Estate 943,388 1,018,167 - 685,807 1,161 1,161 Installment and Other Consumer 134,245 134,245 - 126,474 - - $ 7,117,268 $ 7,202,484 $ - $ 6,354,341 $ 216,413 $ 216,413 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 4,613,940 $ 4,617,879 $ 715,627 $ 4,584,142 $ 203,221 $ 203,221 CRE Owner-Occupied CRE 151,962 151,962 48,462 221,260 - - Commercial Construction, Land Development, and Other Land 4,844,312 4,844,312 1,379,235 4,447,831 - - Other Non Owner-Occupied CRE 72,163 72,163 1,763 44,667 - - Direct Financing Leases 724,953 724,953 504,469 625,107 - - Residential Real Estate 761,458 761,458 355,167 549,286 14,990 14,990 Installment and Other Consumer 68,109 68,109 38,596 40,152 410 410 $ 11,236,897 $ 11,240,836 $ 3,043,319 $ 10,512,445 $ 218,621 $ 218,621 Total Impaired Loans/Leases: C&I $ 6,248,209 $ 6,262,585 $ 715,627 $ 5,990,452 $ 274,404 $ 274,404 CRE Owner-Occupied CRE 441,222 441,222 48,462 300,577 11,902 11,902 Commercial Construction, Land Development, and Other Land 4,844,312 4,844,312 1,379,235 4,447,831 - - Other Non Owner-Occupied CRE 1,243,728 1,243,728 1,763 1,221,405 - - Direct Financing Leases 3,669,492 3,669,492 504,469 3,504,802 132,167 132,167 Residential Real Estate 1,704,846 1,779,625 355,167 1,235,093 16,151 16,151 Installment and Other Consumer 202,354 202,354 38,596 166,626 410 410 $ 18,354,163 $ 18,443,318 $ 3,043,319 $ 16,866,786 $ 435,034 $ 435,034 Impaired loans/leases for which no ’s current estimates. 2016 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 841,895 $ 951,600 $ - $ 2,858,343 $ 16,748 $ 16,748 CRE Owner-Occupied CRE - 93,774 - 312,242 - - Commercial Construction, Land Development, and Other Land - - - - - - Other Non Owner-Occupied CRE 1,196,549 1,196,549 - 1,322,654 - - Direct Financing Leases 1,690,121 1,690,121 - 1,731,982 43,461 43,461 Residential Real Estate 853,294 892,495 - 964,590 9,903 9,903 Installment and Other Consumer 55,734 55,734 - 321,175 4,475 4,475 $ 4,637,593 $ 4,880,273 $ - $ 7,510,986 $ 74,587 $ 74,587 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 8,094,556 $ 8,098,395 $ 1,771,537 $ 2,959,495 $ 17,742 $ 17,742 CRE Owner-Occupied CRE 322,148 322,148 57,398 385,269 - - Commercial Construction, Land Development, and Other Land 4,353,817 4,353,819 577,611 1,022,930 - - Other Non Owner-Occupied CRE 239,600 239,600 58,910 47,920 - - Direct Financing Leases 1,566,143 1,566,143 848,919 841,733 36,303 36,303 Residential Real Estate 807,886 882,018 289,112 573,211 11,675 11,675 Installment and Other Consumer 50,356 50,356 39,481 40,384 527 527 $ 15,434,506 $ 15,512,479 $ 3,642,968 $ 5,870,942 $ 66,247 $ 66,247 Total Impaired Loans/Leases: C&I $ 8,936,451 $ 9,049,995 $ 1,771,537 $ 5,817,838 $ 34,490 $ 34,490 CRE Owner-Occupied CRE 322,148 415,922 57,398 697,511 - - Commercial Construction, Land Development, and Other Land 4,353,817 4,353,819 577,611 1,022,930 - - Other Non Owner-Occupied CRE 1,436,149 1,436,149 58,910 1,370,574 - - Direct Financing Leases 3,256,264 3,256,264 848,919 2,573,715 79,764 79,764 Residential Real Estate 1,661,180 1,774,513 289,112 1,537,801 21,578 21,578 Installment and Other Consumer 106,090 106,090 39,481 361,559 5,002 5,002 $ 20,072,099 $ 20,392,752 $ 3,642,968 $ 13,381,928 $ 140,834 $ 140,834 Impaired loans/leases for which no ’s current estimates. 2015 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 234,636 $ 346,072 $ - $ 380,495 $ 7,436 $ 7,436 CRE Owner-Occupied CRE 256,761 350,535 - 447,144 - - Commercial Construction, Land Development, and Other Land - 228,818 - 117,406 - - Other Non Owner-Occupied CRE 1,578,470 1,578,470 - 2,953,888 - - Direct Financing Leases 871,884 871,884 - 892,281 4,142 4,142 Residential Real Estate 613,486 649,064 - 1,047,001 3,929 3,929 Installment and Other Consumer 377,304 377,304 - 817,854 9,563 9,563 $ 3,932,541 $ 4,402,147 $ - $ 6,656,069 $ 25,070 $ 25,070 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 5,051,846 $ 5,055,685 $ 2,592,270 $ 4,811,046 $ - $ - CRE Owner-Occupied CRE - - - - - - Commercial Construction, Land Development, and Other Land 193,804 205,804 76,934 195,986 - - Other Non Owner-Occupied CRE - - - - - - Direct Financing Leases 829,457 829,457 306,193 474,458 - - Residential Real Estate 805,301 805,301 185,801 712,085 7,913 7,913 Installment and Other Consumer 210,438 210,438 143,089 189,539 5,693 5,693 $ 7,090,846 $ 7,106,685 $ 3,304,287 $ 6,383,114 $ 13,606 $ 13,606 Total Impaired Loans/Leases: C&I $ 5,286,482 $ 5,401,757 $ 2,592,270 $ 5,191,541 $ 7,436 $ 7,436 CRE Owner-Occupied CRE 256,761 350,535 - 447,144 - - Commercial Construction, Land Development, and Other Land 193,804 434,622 76,934 313,392 - - Other Non Owner-Occupied CRE 1,578,470 1,578,470 - 2,953,888 - - Direct Financing Leases 1,701,341 1,701,341 306,193 1,366,739 4,142 4,142 Residential Real Estate 1,418,787 1,454,365 185,801 1,759,086 11,842 11,842 Installment and Other Consumer 587,742 587,742 143,089 1,007,393 15,256 15,256 $ 11,023,387 $ 11,508,832 $ 3,304,287 $ 13,039,183 $ 38,676 $ 38,676 Impaired loans/leases for which no ’s current estimates. For C&I and CRE loans, the Company’s credit quality indicator is internally assigned risk ratings. Each commercial loan is assigned a risk rating upon origination. The risk rating is reviewed every 15 1 For direct financing leases, residential real estate loans, and installment and other consumer loans, the Company ’s credit quality indicator is performance determined by delinquency status. Delinquency status is updated daily by the Company’s loan system. For each class of financing receivable, the following presents the recorded investment by credit quality i ndicator as of December 31, 2017 2016: 2017 CRE Non Owner-Occupied Internally Assigned Risk Rating C&I Owner-Occupied CRE Commercial Construction, Land Development, and Other Land Other CRE Total As a % of Total Pass (Ratings 1 through 5) $ 1,098,722,101 $ 318,293,608 $ 179,142,839 $ 767,119,909 $ 2,363,278,457 96.94 % Special Mention (Rating 6) 10,944,924 8,230,060 1,780,000 10,068,870 31,023,854 1.27 % Substandard (Rating 7) 24,578,731 6,218,809 5,479,565 7,158,221 43,435,326 1.78 % Doubtful (Rating 8) 270,559 - - - 270,559 0.01 % $ 1,134,516,315 $ 332,742,477 $ 186,402,404 $ 784,347,000 $ 2,438,008,197 100.00 % 2017 Delinquency Status * Direct Financing Leases Residential Real Estate Installment and Other Consumer Total As a % of Total Performing $ 137,778,740 $ 256,935,448 $ 118,333,529 $ 513,047,716 98.91 % Nonperforming 3,669,492 1,710,818 277,270 5,657,580 1.09 % $ 141,448,232 $ 258,646,265 $ 118,610,799 $ 518,705,296 100.00 % 2016 CRE Non Owner-Occupied Internally Assigned Risk Rating C&I Owner-Occupied CRE Commercial Construction, Land Development, and Other Land Other CRE Total As a % of Total Pass (Ratings 1 through 5) $ 796,568,451 $ 314,447,662 $ 158,108,465 $ 582,854,048 $ 1,851,978,626 96.40 % Special Mention (Rating 6) 6,305,772 7,559,380 1,780,000 4,437,122 $ 20,082,274 1.05 % Substandard (Rating 7) 24,763,040 10,380,369 5,261,026 8,630,578 $ 49,035,013 2.55 % Doubtful (Rating 8) - 210 - - $ 210 0.00 % $ 827,637,263 $ 332,387,621 $ 165,149,491 $ 595,921,748 $ 1,921,096,123 100.00 % 2016 Delinquency Status * Direct Financing Leases Residential Real Estate Installment and Other Consumer Total As a % of Total Performing $ 161,749,710 $ 227,277,070 $ 81,449,104 $ 470,475,884 98.77 % Nonperforming 3,669,650 1,956,034 216,591 $ 5,842,275 1.23 % $ 165,419,360 $ 229,233,104 $ 81,665,695 $ 476,318,159 100.00 % *Performing = loans/leases accruing and less than 90 . Nonperforming = loans/leases on nonaccrual, accruing loans/leases that are greater than or equal to 90 As of December 31, 2017 2016, $9,394,967 $8,647,007, For each class of financing receivable, the following presents the number and recorded investment of TDRs, by type of concession, that were restructured during the years ended December 31, 2017 2016. December 31, 2017 2016, 2017 Classes of Loans/Leases Number of Loans / Leases Pre- Modification Recorded Investment Post- Modification Recorded Investment Specific Allowance CONCESSION - Extension of Maturity Direct Financing Leases 3 $ 115,236 $ 115,236 $ - 3 $ 115,236 $ 115,236 $ - CONCESSION - Significant Payment Delay C&I 7 $ 826,531 $ 826,531 $ 62,596 CRE - Owner Occupied 1 $ 107,322 $ 107,322 - Direct Financing Leases 24 1,703,255 1,703,255 - 32 $ 2,637,108 $ 2,637,108 $ 62,596 TOTAL 35 $ 2,752,344 $ 2,752,344 $ 62,596 2016 Classes of Loans/Leases Number of Loans/Leases Pre- Modification Recorded Investment Post- Modification Recorded Investment Specific Allowance CONCESSION - Extension of Maturity C&I 3 $ 247,476 $ 247,476 $ 60,767 Direct Financing Leases 4 410,653 410,653 38,476 Residential Real Estate 1 277,092 277,092 187,492 8 $ 935,221 $ 935,221 $ 286,735 CONCESSION - Significant Payment Delay C&I 7 $ 4,562,427 $ 4,562,427 $ 813,041 Direct Financing Leases 13 1,149,493 1,149,493 125,940 20 $ 5,711,920 $ 5,711,920 $ 938,981 CONCESSION - Interest Rate Adjusted Below Market CRE - Other 1 $ 1,233,740 $ 1,233,740 $ - 1 $ 1,233,740 $ 1,233,740 $ - TOTAL 29 $ 7,880,881 $ 7,880,881 $ 1,225,716 Of the TDRs reported above, seven $279,245 December 31, 2017 eight $2,008,424 December 31, 2016. For the year ended December 31, 2017, six $251,940 12 90 December 31, 2016, no 12 Not he Company had two 2017, $65,623. three 2016, $341,952. Loans are made in the normal course of business to directors, executive officers, and their related interests. The terms of these loans, including interest rates and collateral, are similar to those prevailing for comparable transactions with other persons. An analysis of the changes in the aggregate committed amount of loans greater than or equal to $60,000 December 31, 2017, 2016, 2015, 2017 2016 2015 Balance, beginning $ 61,608,976 $ 42,012,313 $ 42,469,111 Net increase (decrease) due to change in related parties 11,926,759 19,945,960 (3,606,418 ) Advances 13,090,798 4,806,616 19,040,675 Repayments (20,184,585 ) (5,155,913 ) (15,891,055 ) Balance, ending $ 66,441,948 $ 61,608,976 $ 42,012,313 The Company ’s loan portfolio includes a geographic concentration in the Midwest. Additionally, the loan portfolio includes a concentration of loans in certain industries as of December 31, 2017 2016 2017 2016 Industry Name Balance Percentage of Total Loans/Leases Balance Percentage of Total Loans/Leases Lessors of Non-Residential Buildings $ 400,622,681 14 % $ 359,040,649 15 % Lessors of Residential Buildings 370,353,561 12 % 166,036,201 7 % Administration of Urban Planning & Community & Rural Development 83,343,541 3 % 37,097,000 2 % Bank Holding Companies 66,950,294 2 % 66,069,612 3 % Nonresidential Property Managers 51,984,722 2 % 76,504,076 3 % Concentrations within the leasing portfolio are monitored by equipment type – none 50 No

Note 5 - Premises and Equipment

Note 5 - Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	5. The following summarizes the components of premises and equipment as of December 31, 2017 2016: 2017 2016 Land $ 13,466,930 $ 12,936,223 Buildings (useful lives 15 to 50 years) 53,633,788 51,546,499 Furniture and equipment (useful lives 3 to 10 years) 31,984,631 28,458,946 Premises and equipment 99,085,349 92,941,668 Less accumulated depreciation 36,247,094 32,298,160 Premises and equipment, net $ 62,838,255 $ 60,643,508 Certain facilities are leased under operating leases. Rental expense was $348,467, $334,977, $339,839 December 31, 2017, 2016, 2015, Future minimum rental commitments under noncancelable leases are as follows as of December 31, 2017: Year ending December 31: 2018 363,791 2019 355,727 2020 259,798 2021 159,708 2022 91,969 Thereafter 62,858 $ 1,293,851 During 2016, n entity that is owned and controlled by a CRBT director. That business was chosen as the general contractor for the remodel of the Waterloo branch. The business was the original contractor for the branch and is recognized as a leader in Iowa and the Midwest market for the design and construction of financial services and professional office buildings. Based on the entity’s expertise, its experience as the original designer/builder of the branch location and a decline to bid from two The project total was estimated at $3.7 $2.2 December 31, 2017, no

Note 6 - Goodwill and Intangibl

Note 6 - Goodwill and Intangibles	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	6 . Goodwill and Intangibles The following table presents the changes in the carrying amount of goodwill as of December 31, 2017 2016: 2017 2016 Balance at the beginning of period $ 13,110,913 $ 3,222,688 Goodwill from acquisition of Guaranty Bank 15,223,179 - Goodwill from acquisition of CSB - 9,888,225 Balance at the end of period $ 28,334,092 $ 13,110,913 The following table presents the changes in the carrying amount of core deposit intangibles, gross carrying amount, accumulated amortization, and net book value as of December 31, 2017 2016: 2017 2016 Balance at the beginning of the period $ 7,381,213 $ 1,471,410 Core deposit intangible from acquisition of Guaranty Bank 2,698,301 - Core deposit intangible from acquisition of CSB - 6,352,653 Amortization expense (1,000,561 ) (442,850 ) Balance at the end of the period $ 9,078,953 $ 7,381,213 Gross carrying amount $ 11,046,081 $ 8,347,780 Accumulated amortization (1,967,128 ) (966,567 ) Net book value $ 9,078,953 $ 7,381,213 The following table presents the estimated amortization of the core deposit intangible: Years ending December 31, Amount 2018 $ 1,218,202 2019 1,196,331 2020 1,169,934 2021 1,139,012 2022 1,103,565 Thereafter 3,251,909 $ 9,078,953 See Note 2 s of CSB and Guaranty Bank and the related goodwill and core deposit intangible.

Note 7 - Derivatives and Hedgin

Note 7 - Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	7. Below is a summary of the interest rate cap derivatives held by the Company as of December 31, 2017 2016. $2.1 two Effective Date Maturity Date Balance Sheet Location Notional Amount Accounting Treatment December 31, 2017 Fair Value December 31, 2016 Fair Value June 5, 2014 June 5, 2019 Other Assets $ 15,000,000 Cash Flow Hedging $ 190,085 $ 179,939 June 5, 2014 June 5, 2021 Other Assets 15,000,000 Cash Flow Hedging 316,615 396,588 $ 30,000,000 $ 506,700 $ 576,527 Changes in the fair values of derivative financial instruments accounted for as cash flow hedges to the extent they are effective hedges, are recorded as a component of accumulated other comprehensive income. The following is a summary of how AOCI was impacted during the reporting periods: Year Ended December 31, 2017 December 31, 2016 Unrealized loss at beginning of period, net of tax $ (932,156 ) $ (799,421 ) Amount reclassified from accumulated other comprehensive income to noninterest income related to hedge ineffectiveness - (76,797 ) Amount reclassified from accumulated other comprehensive income to noninterest expense related to hedge ineffectiveness 79,757 - Amount reclassified from accumulated other comprehensive income to interest expense related to caplet amortization 405,134 152,087 Amount of loss recognized in other comprehensive income, net of tax (357,762 ) (208,025 ) Unrealized loss at end of period, net of tax $ (805,027 ) $ (932,156 ) Changes in the fair value related to the ineffective portion of cash flow hedges, are reported in noninterest income during the period of the change. As shown in the table above, $79,757 $76,797 December 31, 2017 2016,

Note 8 - Deposits

Note 8 - Deposits	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	8. The aggregate amount of certificates of deposit, each with a minimum denomination of $ 250,000, $364,329,340 $300,852,485 December 31, 2017 2016, As of December 31, 2017, Year ending December 31: 2018 $ 478,334,220 2019 86,231,955 2020 18,143,039 2021 8,223,919 2022 5,071,695 Thereafter 67,050 $ 596,071,878 The Company had a $35.0 $10.1 December 31, 2017. December 31, 2016, $40.0 $7.0 no December 31, 2017 2016.

Note 9 - Short-term Borrowings

Note 9 - Short-term Borrowings	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Short-term Debt [Text Block]	9. Short-term borrowings as of December 31, 2017 2016 2017 2016 Overnight repurchase agreements with customers $ 7,003,122 $ 8,131,387 Federal funds purchased 6,990,000 31,840,000 $ 13,993,122 $ 39,971,387 The Company ’s overnight repurchase agreements with customers are collateralized by investment securities with carrying values as follows: 2017 2016 U.S. govt. sponsored agency securities $ 2,077,702 $ 630,077 Residential mortgage-backed and related securities 18,816,280 19,090,261 Total securities pledged to overnight customer repurchase agreements 20,893,982 19,720,338 Less: overcollateralized position 13,890,860 11,588,951 $ 7,003,122 $ 8,131,387 Inherent in the overnight purchase agreements is a risk that the fair value of the collateral pledged on the agreements could decline below the amount obligated under our customer repurchase agreements. The Company considers this risk minimal. The Company monitors balances daily to ensure that collateral is sufficient to meet obligations. Additionally, the Company maintains an overcollateralized position that is sufficient to cover any minor interest rate movements. The securities underlying the agreements as of December 31, 2017 2016 third Information concerning overnight repurchase agreements with customers is summarized as follows as of December 31, 2017 2016: 2017 2016 Average daily balance during the period $ 7,475,824 $ 30,082,866 Average daily interest rate during the period 0.08 % 0.07 % Maximum month-end balance during the period $ 11,829,201 $ 59,833,229 Weighted average rate as of end of period 0.15 % 0.02 % Information concerning federal funds purchased is summarized as follows as of December 31, 2017 2016: 2017 2016 Average daily balance during the period $ 13,486,239 $ 19,105,595 Average daily interest rate during the period 1.31 % 0.56 % Maximum month-end balance during the period $ 33,650,000 $ 51,750,000 Weighted average rate as of end of period 1.24 % 0.70 %

Note 10 - FHLB Advances

Note 10 - FHLB Advances	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Federal Home Loan Bank Advances, Disclosure [Text Block]	10 . FHLB Advances The subsidiary banks are members of the FHLB of Des Moines or Chicago. Maturity and interest rate information on advances from FHLB as of December 31, 2017 2016 December 31, 2017 December 31, 2016 Weighted Weighted Average Average Interest Rate Interest Rate Amount Due at Year-End Amount Due at Year-End Maturity: Year ending December 31: 2017 $ - - $ 112,500,000 0.78 % 2018 190,400,000 1.82 25,000,000 3.35 2020 1,600,000 1.75 - - Total FHLB advances $ 192,000,000 1.82 % $ 137,500,000 1.25 % *Of the advances outstanding, a portion have putable options which allow the FHLB, at its discretion, to terminate the advances and require the subsidiary banks to repay at predetermined dates prior to the stated maturity date of the advances. Advances are collateralized by loans of $ 850,115,910 $669,513,037 December 31, 2017 2016, 125% 333% $6,690,525 December 31, 2017, December 31, 2016, no As of December 31, 2017 2018 $165.4 1 1 $104.5 December 31, 2016 1 1 Throughout 2016, December 31, 2016: 2016 Date of Restructuring Amount Weighted Average Interest Rate Range of Maturity Dates Prepayment Fees First Quarter of 2016 $ 10,000,000 3.86 % December 2017 $ 524,197 Third Quarter of 2016 5,000,000 2.84 % February 2018 127,310 Fourth Quarter of 2016 15,000,000 3.14 % September 2017 to November 2017 357,161 Total for 2016 $ 30,000,000 3.33 % $ 1,008,668 All prepayment fees shown in the table above are included in losses on debt extinguishment in the statements of income. As of December 31, 2017 2016, $11,676,700 $9,271,300,

Note 11 - Other Borrowings and

Note 11 - Other Borrowings and Unused Lines of Credit	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Debt Disclosure [Text Block]	11. Other borrowings as of December 31, 2017 2016 2017 2016 Wholesale structured repurchase agreements $ 35,000,000 $ 45,000,000 Term notes 31,000,000 30,000,000 Revolving line of credit - 5,000,000 $ 66,000,000 $ 80,000,000 The Company ’s wholesale structured repurchase agreements are collateralized by investment securities with carrying values as follows: 2017 2016 U.S. govt. sponsored agency securities $ 3,474,555 $ 20,798,703 Residential mortgage-backed and related securities 61,528,167 31,321,028 Total securities pledged to wholesale customer repurchase agreements 65,002,722 52,119,731 Less: overcollateralized position 30,002,722 7,119,731 $ 35,000,000 $ 45,000,000 Inherent in the wholesale structured repurchase agreements is a risk that the fair value of the collateral pledged on the agreements could decline below the amount obligated under the agreements. The Company considers this risk minimal. The Company maintains an overcollateralized position that is sufficient to cover any minor interest rate movements. Throughout 2016, December 31, 2016: 2016 Date of Restructuring Amount Weighted Average Interest Rate Range of Maturity Dates Prepayment Fees First Quarter of 2016 $ 10,000,000 3.97 % July 2018 $ 759,000 Third Quarter of 2016 55,000,000 3.27 % February 2019 to September 2020 4,010,000 Total for 2016 $ 65,000,000 3.38 % $ 4,769,000 All prepayment fees shown in the table above are included in losses on debt extinguishment in the statements of income. There were no 2017 2016. Maturity and interest rate information concerning wholesale structured repurchase agreements is summarized as follows: December 31, 2017 December 31, 2016 Weighted Weighted Average Average Interest Rate Interest Rate Amount Due at Year-End Amount Due at Year-End Maturity: Year ending December 31: 2017 $ - - $ 10,000,000 3.00 % 2019 10,000,000 3.44 10,000,000 3.44 2020 25,000,000 2.48 25,000,000 2.48 Total Wholesale Structured Repurchase Agreements $ 35,000,000 2.76 % $ 45,000,000 2.81 % The Company has two s. The first December 31, 2021. $24.0 $30.0 December 31, 2017 2016, 3.00% 4.56% 3.77% December 31, 2017 2016, second $7.0 third 2017 December 31, 2021 3.00% 4.56% December 31, 2017). The Company has a $10.0 available for which there is no December 31, 2017. 2.50% 4.06% December 31, 2017). For the term note s, the Company is required to make quarterly principal payments of $1,937,500 December 31, 2017, As of December 31, 2017 2018 $ 7,750,000 2019 7,750,000 2020 7,750,000 2021 7,750,000 $ 31,000,000 Unused lines of credit of the subsidiary banks as of December 31, 2017 2016 2017 2016 Secured $ 2,967,441 $ 34,409,192 Unsecured 372,000,000 347,000,000 $ 374,967,441 $ 381,409,192 T he Company pledges the eligible portion of its municipal securities portfolio and select C&I and CRE loans to the Federal Reserve Bank of Chicago for borrowing at the Discount Window .

Note 12 - Junior Subordinated D

Note 12 - Junior Subordinated Debentures	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Subordinated Borrowings Disclosure [Text Block]	1 2 . Junior Subordinated Debentures Junior subordinated debentures are summarized as of December 31, 2017 2016 2017 2016 Note Payable to QCR Holdings Capital Trust II $ 10,310,000 $ 10,310,000 Note Payable to QCR Holdings Capital Trust III 8,248,000 8,248,000 Note Payable to QCR Holdings Capital Trust V 10,310,000 10,310,000 Note Payable to Community National Trust II 3,093,000 3,093,000 Note Payable to Community National Trust III 3,609,000 3,609,000 Note Payable to Guaranty Bankshares Statutory Trust I* 4,640,000 - Market Value Discount per ASC 805** (2,723,513 ) (2,089,798 ) $ 37,486,487 $ 33,480,202 * As part of the acquisition of Guaranty Bank, the Company assumed one $3,857,275. ** Discount on junior subordinated debt acquired in 2013 2017 A schedule of the Company ’s non-consolidated subsidiaries formed for the issuance of trust preferred securities, including the amounts outstanding as of December 31, 2017 2016, Name Date Issued Amount Outstanding December 31, 2017 Amount Outstanding December 31, 2016 Interest Rate Interest Rate as of December 31, 2017 Interest Rate as of December 31, 2016 QCR Holdings Statutory Trust II* February 2004 $ 10,310,000 $ 10,310,000 2.85% over 3-month LIBOR 4.54% 3.85% QCR Holdings Statutory Trust III February 2004 8,248,000 8,248,000 2.85% over 3-month LIBOR 4.54% 3.85% QCR Holdings Statutory Trust V February 2006 10,310,000 10,310,000 1.55% over 3-month LIBOR 2.91% 2.43% Community National Statutory Trust II September 2004 3,093,000 3,093,000 2.17% over 3-month LIBOR 3.80% 3.17% Community National Statutory Trust III March 2007 3,609,000 3,609,000 1.75% over 3-month LIBOR 3.32% 2.71% Guaranty Bankshares Statutory Trust I May 2005 4,640,000 - 1.75% over 3-month LIBOR 3.34% N/A $ 40,210,000 $ 35,570,000 Weighted Average Rate 3.82% 3.26% *Original amount issued for QCR Holdings Statutory Trust II was $12,372,000. Securities issued by all of the trusts listed above mature 30 During 2015, acquired and extinguished $2.1 $300,000 2.85% 3.18% In 2016, $5.1 $1.2 through auction. This gain is included within the overall net losses on debt extinguishments in the statements of income for 2016. 3 1.80% 2.42%

Note 13 - Federal and State Inc

Note 13 - Federal and State Income Taxes	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. Federal and state income tax expense was comprised of the following components for the years ended December 31, 2017, 2016, 2015: 2017 2016 2015 Current $ 10,976,005 $ 11,969,194 $ 5,673,774 Deferred (6,029,555 ) (3,066,407 ) (2,004,532 ) $ 4,946,450 $ 8,902,787 $ 3,669,242 A reconciliation of the expected federal income tax expense to the income tax expense included in the consolidated statements of income was as follows for the years ended December 31, 2017, 2016, 2015: Years Ended December 31, 2017 2016 2015 % of % of % of Pretax Pretax Pretax Amount Income Amount Income Amount Income Computed "expected" tax expense $ 14,228,535 35.0 % $ 12,806,351 35.0 % $ 7,208,993 35.0 % Effect of graduated tax rates - - (250,013 ) (0.7 ) (76,973 ) (0.4 ) Tax exempt income, net (5,653,979 ) (13.9 ) (4,343,270 ) (11.9 ) (3,461,438 ) (16.8 ) Bank-owned life insurance (630,855 ) (1.5 ) (619,988 ) (1.7 ) (616,737 ) (3.0 ) State income taxes, net of federal benefit, current year 1,764,671 4.3 1,245,524 3.4 767,557 3.7 Change in unrecognized tax benefits (53,699 ) (0.1 ) 121,008 0.3 223,668 1.1 New Markets Tax Credits and other credits (341,268 ) (0.8 ) (180,000 ) (0.5 ) (180,000 ) (0.9 ) Acquisition costs - - 176,050 0.5 - - Excess tax benefit on stock options exercised and restricted stock awards vested (1,219,483 ) (3.0 ) - - - - Re-measurement of deferred tax asset to incorporate newly enacted tax rates (2,918,606 ) (7.2 ) - - - - Other (228,866 ) (0.6 ) (52,875 ) (0.1 ) (195,828 ) (0.9 ) $ 4,946,450 12.2 % $ 8,902,787 24.3 % $ 3,669,242 17.8 % Changes in the unrecognized tax benefits included in other liabilities are as follows for the years ended December 31, 2017 2016: 2017 2016 Balance, beginning $ 1,346,967 $ 1,225,959 Impact of tax positions taken during current year 333,253 319,047 Gross increase (decrease) related to tax positions of prior years (40,584 ) 17,789 Reduction as a result of a lapse of the applicable statute of limitations (346,368 ) (215,828 ) Balance, ending $ 1,293,268 $ 1,346,967 Included in the unrecognized tax benefits liability at December 31, 2017 $1,143,000 The liability for unrecognized tax benefits includes accrued interest for tax positions, which either do not not December 31, 2017 2016, $150,000 $223,000, The Company ’s federal income tax returns are open and subject to examination from the 2014 2013 The net deferred tax assets consisted of the following as of December 31, 2017 2016: 2017 2016 Deferred tax assets: Alternative minimum tax credits $ 6,513,502 $ 6,513,502 New markets tax credits 2,164,727 1,797,587 Net unrealized losses on securities available for sale and derivative instruments 498,860 1,470,759 Compensation 6,282,603 8,737,976 Loan/lease losses 8,029,714 10,479,227 Net operating loss carryforwards, federal and state 959,627 1,879,746 Other 34,962 247,594 24,483,995 31,126,391 Deferred tax liabilities: Premises and equipment 2,400,397 4,899,107 Equipment financing leases 15,367,705 22,050,540 Acquisition fair value adjustments 1,864,599 1,336,338 Investment accretion 30,656 46,581 Deferred loan origination fees, net 115,153 261,915 Other 430,125 456,219 20,208,635 29,050,700 Net deferred tax assets $ 4,275,360 $ 2,075,691 At December 31, 2017, $4.6 2029 2033. December 31, 2017, $2.1 2023 2028. The change in deferred income taxes was reflected in the consolidated financial statements as follows for the years ended December 31, 2017, 2016, 2015: 2017 2016 2015 Provision for income taxes $ (6,029,555 ) $ (3,066,407 ) $ (2,004,532 ) Net deferred tax asset acquired - (3,310,553 ) - Net deferred tax asset resulting from market value adjustments of acquisitions 243,195 5,110,015 - Re-measurement of deferred tax asset to incorporate newly enacted tax rates 2,918,606 - - Statement of stockholders' equity- Other comprehensive income (loss) 668,085 (202,691 ) (81,524 ) $ (2,199,669 ) $ (1,469,636 ) $ (2,086,056 ) The Tax Act was enacted on December 22, 2017 35% 21%. As a result, the Company revalued the deferred tax assets and liabilities to reflect the lower federal corporate tax rate, which resulted in the Company recognizing a benefit of $2.9 fourth 2017. not

Note 14 - Employee Benefit Plan

Note 14 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	14. The Company has a profit sharing plan which includes a provision designed to qualify under Section 401 1986, 100% first 3% 50% 3% 4.5% may December 31, 2017, 2016, 2015 2017 2016 2015 Matching contribution $ 1,663,198 $ 1,365,111 $ 1,314,276 $ 1,663,198 $ 1,365,111 $ 1,314,276 The Company has entered into nonqualified supplemental executive retirement plans (SERPs) with certain executive officers. The SERPs allow certain executives to accumulate retirement benefits beyond those provided by the qualified plans. During the years ended December 31, 2017, 2016, 2015, $400,784, $322,575, $297,826, December 31, 2017 2016, $4,330,313 $4,093,355, $163,826, $163,825 $163,824 2017, 2016 2015, The Company has entered into deferred compensation agreements with certain executive officers. Under the provisions of the agreements , the officers may $8,000 $25,000 The Wall Street Journal 4% 12% may 4% 10% The Wall Street Journal one 4% not 8%. 180 December 31, 2017 2016, $12,346,935 $10,455,183, Changes in the deferred compensation agreements , included in other liabilities, are as follows for the years ended December 31, 2017, 2016, 2015: 2017 2016 2015 Balance, beginning $ 10,455,183 $ 8,875,025 $ 7,503,692 Employee deferrals 932,921 794,168 693,656 Company match and interest 1,024,933 848,831 726,001 Cash payments made (66,102 ) (62,841 ) (48,324 ) Balance, ending $ 12,346,935 $ 10,455,183 $ 8,875,025

Note 15 - Stock-based Compensat

Note 15 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	15. The Company ’s Board of Directors adopted in January 2008, May 2008, 2008 “2008 February 2010, May 2010, 2010 “2010 February 2013, May 2013, 2013 “2013 February 2016, May 2016, 2016 “2016 250,000, 350,000, 350,000, 400,000 may The 2008 2010 2013 , and the 2016 December 31, 2017, 351,205 may 2016 The number and exercise price of options granted under the stock option plans are determined by the Committee at the time the option is granted. In no 10 3 7 Stock-based compensation expense was reflected in the consolidated financial statements as follows for the years ended December 31, 2017, 2016, 2015. 2017 2016 2015 Stock options $ 554,435 $ 424,904 $ 393,114 Restricted stock awards 552,907 460,853 492,410 Stock purchase plan 79,694 61,417 55,945 $ 1,187,036 $ 947,174 $ 941,469 Stock options: A summary of the stock option plans as of December 31, 2017, 2016, 2015 December 31, 2017 2016 2015 Weighted Weighted Weighted Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding, beginning 587,961 $ 14.83 623,176 $ 13.88 661,771 $ 13.89 Granted 43,250 43.86 76,749 22.92 73,403 17.63 Exercised (114,100 ) 15.12 (111,423 ) 14.97 (79,638 ) 14.70 Forfeited (3,557 ) 26.74 (541 ) 18.36 (32,360 ) 20.69 Outstanding, ending 513,554 17.13 587,961 14.83 623,176 13.88 Exercisable, ending 354,269 385,372 405,832 Weighted average fair value per option granted $ 14.75 $ 7.31 $ 5.11 A further summary of options outstanding as of December 31, 2017 Options Outstanding Weighted Options Exercisable Average Weighted Weighted Remaining Average Average Range of Number Contractual Exercise Number Exercise Exercise Prices Outstanding Life Price Exercisable Price $7.99 to $8.93 27,850 3.06 $ 8.09 27,850 $ 8.09 $9.00 to $9.30 148,755 2.77 9.22 147,955 9.22 $15.00 to $16.85 90,668 4.59 15.63 79,369 15.64 $17.10 to $18.00 132,816 6.57 17.31 81,521 17.26 $21.71 to $31.53 70,215 8.08 22.63 16,273 22.64 $42.65 to $48.50 43,250 9.20 43.86 1,301 42.75 513,554 354,269 Restricted stock awards: A summary of changes in the Company ’s nonvested restricted stock awards as of December 31, 2017, 2016 2015 December 31, 2017 2016 2015 Outstanding, beginning $ 39,438 $ 45,046 $ 49,833 Granted 28,289 22,382 28,846 Released (21,338 ) (27,490 ) (33,633 ) Forfeited - (500 ) - Outstanding, ending $ 46,389 $ 39,438 $ 45,046 Weighted average fair value per share granted $ 44.44 $ 22.64 $ 17.80 The total grant-date fair value of restricted stock awards that were released during the years ended December 31, 2017, 2016 2015 $925,735, $632,255 $598,341, Stock purchase plan: The Company ’s Board of Directors and its stockholders adopted in October 2002 May 2, 2012, January 1, 2017, 187,921 six 90% one $10,000. one 10% December 31, 2017. one 8% December 31, 2016, 2015. December 31, 2017, 2016, 2015 2017 2016 2015 Shares granted 12,414 18,711 23,408 Shares purchased 13,318 20,192 24,033 Weighted average fair value per share granted $ 6.42 $ 3.28 $ 2.39

Note 16 - Regulatory Capital Re

Note 16 - Regulatory Capital Requirements and Restrictions on Dividends	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Regulatory Capital Requirements under Banking Regulations [Text Block]	16. The Company (on a consolidated basis) and the subsidiary banks are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company and subsidiary banks ’ financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the subsidiary banks must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and the subsidiary banks to maintain minimum amounts and ratios (set forth in the following table) of total common equity Tier 1 1 1 December 31, 2017 2016, Under the regulatory framework for prompt corrective action, t o be categorized as “well capitalized,” an institution must maintain minimum total risk-based, Tier 1 1 1 December 31, 2017 2016 December 31, 2017 2016, For Capital To Be Well Adequacy Purposes Capitalized Under For Capital With Capital Prompt Corrective Actual Adequacy Purposes Conservation Buffer* Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Company: Total risk-based capital $ 383,282 11.15 % $ 275,090 > 8.00 % $ 318,073 > 9.250 % $ 343,862 > 10.00 % Tier 1 risk-based capital 348,530 10.14 % 206,317 > 6.00 249,300 > 7.250 275,090 > 8.00 Tier 1 leverage 348,530 8.98 % 155,256 > 4.00 155,256 > 4.000 194,070 > 5.00 Common equity Tier 1 313,012 9.10 % 154,738 > 4.50 197,721 > 5.750 223,510 > 6.50 Quad City Bank & Trust: Total risk-based capital $ 160,112 12.35 % $ 103,711 > 8.00 % $ 119,916 > 9.250 % $ 129,639 > 10.00 % Tier 1 risk-based capital 147,472 11.38 % 77,783 > 6.00 93,988 > 7.250 103,711 > 8.00 Tier 1 leverage 147,472 9.52 % 61,985 > 4.00 61,985 > 4.000 77,481 > 5.00 Common equity Tier 1 147,472 11.38 % 58,337 > 4.50 74,542 > 5.750 84,265 > 6.50 Cedar Rapids Bank & Trust: Total risk-based capital $ 138,492 11.88 % $ 93,272 > 8.00 % $ 107,846 > 9.250 % $ 116,590 > 10.00 % Tier 1 risk-based capital 126,601 10.86 % 69,954 > 6.00 84,528 > 7.250 93,272 > 8.00 Tier 1 leverage 126,601 11.68 % 43,348 > 4.00 43,348 > 4.000 54,185 > 5.00 Common equity Tier 1 126,601 10.86 % 52,465 > 4.50 67,039 > 5.750 75,783 > 6.50 Community State Bank: Total risk-based capital $ 66,271 11.71 % $ 45,293 > 8.00 % $ 52,370 > 9.250 % $ 56,616 > 10.00 % Tier 1 risk-based capital 61,941 10.94 % 33,970 > 6.00 41,047 > 7.250 45,293 > 8.00 Tier 1 leverage 61,941 9.77 % 25,354 > 4.00 25,354 > 4.000 31,693 > 5.00 Common equity Tier 1 61,941 10.94 % 25,477 > 4.50 32,554 > 5.750 36,801 > 6.50 Rockford Bank & Trust: Total risk-based capital $ 45,684 11.28 % $ 32,413 > 8.00 % $ 37,477 > 9.250 % $ 40,516 > 10.00 % Tier 1 risk-based capital 40,615 10.02 % 24,310 > 6.00 29,374 > 7.250 32,413 > 8.00 Tier 1 leverage 40,615 8.94 % 18,177 > 4.00 18,177 > 4.000 22,721 > 5.00 Common equity Tier 1 40,615 10.02 % 18,232 > 4.50 23,297 > 5.750 26,335 > 6.50 For Capital Adequacy Purposes To Be Well Capitalized Under For Capital With Capital Prompt Corrective Actual Adequacy Purposes Conservation Buffer* Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016: Company: Total risk-based capital $ 327,440 11.56 % $ 226,587 > 8.00 % $ 244,289 > 8.625 % $ 283,233 > 10.00 % Tier 1 risk-based capital 296,366 10.46 % 169,940 > 6.00 187,642 > 6.625 226,587 > 8.00 Tier 1 leverage 296,366 9.10 % 130,229 > 4.00 130,229 > 4.000 162,787 > 5.00 Common equity Tier 1 266,419 9.41 % 127,455 > 4.50 145,157 > 5.125 184,102 > 6.50 Quad City Bank & Trust: Total risk-based capital $ 142,990 12.27 % $ 93,212 > 8.00 % $ 100,494 > 8.625 % $ 116,515 > 10.00 % Tier 1 risk-based capital 129,524 11.12 % 69,909 > 6.00 77,191 > 6.625 93,212 > 8.00 Tier 1 leverage 129,524 9.18 % 56,445 > 4.00 56,445 > 4.000 70,556 > 5.00 Common equity Tier 1 129,524 11.12 % 52,432 > 4.50 59,714 > 5.125 75,735 > 6.50 Cedar Rapids Bank & Trust: Total risk-based capital $ 106,791 12.82 % $ 66,623 > 8.00 % $ 71,828 > 8.625 % $ 83,279 > 10.00 % Tier 1 risk-based capital 96,369 11.57 % 49,968 > 6.00 55,173 > 6.625 66,623 > 8.00 Tier 1 leverage 96,369 10.69 % 36,061 > 4.00 36,061 > 4.000 45,076 > 5.00 Common equity Tier 1 96,369 11.57 % 37,476 > 4.50 42,681 > 5.125 54,132 > 6.50 Community State Bank: Total risk-based capital $ 68,216 13.81 % $ 39,521 > 8.00 % $ 42,609 > 8.625 % $ 49,402 > 10.00 % Tier 1 risk-based capital 66,746 13.51 % 29,641 > 6.00 32,729 > 6.625 39,522 > 8.00 Tier 1 leverage 66,746 11.75 % 22,726 > 4.00 22,726 > 4.000 28,408 > 5.00 Common equity Tier 1 66,746 13.51 % 22,231 > 4.50 25,319 > 5.125 32,111 > 6.50 Rockford Bank & Trust: Total risk-based capital $ 42,007 12.26 % $ 27,410 > 8.00 % $ 29,551 > 8.625 % $ 34,262 > 10.00 % Tier 1 risk-based capital 37,716 11.01 % 20,558 > 6.00 22,699 > 6.625 27,410 > 8.00 Tier 1 leverage 37,716 9.57 % 15,772 > 4.00 15,772 > 4.000 19,716 > 5.00 Common equity Tier 1 37,716 11.01 % 15,418 > 4.50 17,559 > 5.125 22,270 > 6.50 *The minimums under Basel III phase in higher by .625% 1 2019. The fully phased-in minimums are 10.5% 8.5% 1 7.0% 1 The Company ’s ability to pay dividends to its stockholders may The payment of dividends by any financial institution or its holding company is affected by the requirement to maintain adequate capital pursuant to applicable capital adequacy guidelines and regulations, and a financial institution generally is prohibited from paying any dividends if, following payment thereof, the institution would be undercapitalized. Notwithstanding the availability of funds for dividends, however, the Federal Reserve may subsidiary banks if the Federal Reserve determines such payment would constitute an unsafe or unsound practice. The Company also has certain contractual restrictions on its ability to pay dividends. The Company has issued junior subordinated debentures in four and assumed two may not December 31, 2017 2016. T he Company filed a universal shelf registration statement on Form S- 3 October 27, 2016, January 11, 2017. January 31, 2017, $100 $30.1 $100 second 2016 2 3 $100

Note 17 - Earnings Per Share

Note 17 - Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Earnings Per Share [Text Block]	17. The following information was used in the computation of basic and diluted EPS for the years ended December 31, 2017, 2016, 2015: 2017 2016 2015 Net income attributable to QCR Holdings, Inc. common stockholders $ 35,706,507 $ 27,686,787 $ 16,927,881 EPS attributable to QCR Holdings, Inc. common stockholders Basic $ 2.68 $ 2.20 $ 1.64 Diluted $ 2.61 $ 2.17 $ 1.61 Weighted average common shares outstanding* 13,325,128 12,570,767 10,345,286 Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan** 355,344 195,236 154,555 Weighted average common and common equivalent shares outstanding 13,680,472 12,766,003 10,499,841 * The increase in weighted average common shares outstanding from 2015 2016 ** Excludes anti-dilutive shares of 49,919, 17,739, 36,572 December 31,2017, 2016 2015,

Note 18 - Commitments and Conti

Note 18 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	18. In the normal course of business, the subsidiary banks make various commitments and incur certain contingent liabilities that are not Commitments to extend credit are agreements to lend to a customer as long as there is no may not may Standby letters of credit are conditional commitments issued by the subsidiary banks to guarantee the performance of a customer to a third one not third December 31, 2017 2016, no As of December 31, 2017 2016, $791,550,060 $666,778,085, December 31, 2017 2016, $17,283,025 $15,697,469, not The Company has also executed contracts for the sale of mortgage loans in the secondary market in the amount of $ 645,001 $1,135,500 December 31, 2017 2016, Residential mortgage loans sold to investors in the secondary market are sold with varying recourse provisions. Essentially, all loan sales agreements require the repurchase of a mortgage loan by the seller in situations such as breach of representation, warranty, or covenant, untimely document delivery, false or misleading statements, failure to obtain certain certificates o f insurance, unmarketability, etc. Certain loan sales agreements contain repurchase requirements based on payment-related defects that are defined in terms of the number of days/months since the purchase, the sequence number of the payment, and/or the number of days of payment delinquency. Based on the specific terms stated in the agreements of investors purchasing residential mortgage loans from the Company’s subsidiary banks, the Company had $300,000 $916,900 December 31, 2017 2016, not December 31, 2017, 2016, 2015. not no Aside from cash on-hand and in-vault, the majority of the Company's cash is maintained at upstream correspondent banks. The total amount of cash on deposit, certificates of deposit, and federal funds sold exceeded federal insured limits by approximately $42.9 $48.5 December 31, 2017 2016, no In an arrangement with Goldman Sachs, CRBT offers a cash management program for select customers. Based on a predetermined minimum balance, which must be maintained in the account, excess funds are automatically swept daily to an institutional money market fund administered by Goldman Sachs. At December 31, 2017 2016, $136,032,073 $117,985,224, no

Note 19 - Quarterly Results of

Note 19 - Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Quarterly Financial Information [Text Block]	19 . Quarterly Results of Operations (Unaudited) Year Ended December 31, 2017 March June September December 2017 2017 2017 2017 Total interest income $ 31,345,099 $ 32,453,268 $ 33,840,865 $ 37,878,086 Total interest expense 3,676,216 4,406,571 5,284,517 6,084,733 Net interest income 27,668,883 28,046,697 28,556,348 31,793,353 Provision for loan/lease losses 2,105,109 2,022,993 2,086,436 2,255,381 Noninterest income 7,283,754 6,782,518 6,701,303 9,714,717 Noninterest expense 21,273,117 21,404,629 23,395,747 31,351,204 Income before taxes 11,574,411 11,401,593 9,775,468 7,901,485 Federal and state income tax expense (benefit) 2,389,446 2,635,576 1,921,533 (2,000,105 ) Net income $ 9,184,965 $ 8,766,017 $ 7,853,935 $ 9,901,590 EPS: Basic $ 0.70 $ 0.67 $ 0.60 $ 0.72 Diluted $ 0.68 $ 0.65 $ 0.58 $ 0.70 Year Ended December 31, 2016 March June September December 2016 2016 2016 2016 Total interest income $ 23,502,059 $ 23,913,284 $ 26,816,735 $ 32,235,657 Total interest expense 2,904,537 2,904,471 3,185,958 2,955,992 Net interest income 20,597,522 21,008,813 23,630,777 29,279,665 Provision for loan/lease losses 2,072,985 1,197,850 1,607,986 2,599,345 Noninterest income 6,822,473 6,762,401 10,423,401 7,028,600 Noninterest expense 16,954,498 17,743,753 24,480,483 22,307,178 Income before taxes 8,392,512 8,829,611 7,965,709 11,401,742 Federal and state income tax expense 2,019,023 2,153,144 1,858,208 2,872,412 Net income $ 6,373,489 $ 6,676,467 $ 6,107,501 $ 8,529,330 EPS: Basic $ 0.54 $ 0.54 $ 0.47 $ 0.65 Diluted $ 0.53 $ 0.53 $ 0.46 $ 0.64

Note 20 - Parent Company Only F

Note 20 - Parent Company Only Financial Statements	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	20. The following is condensed financial information of QCR Holdings, Inc. (parent company only): Condensed Balance Sheets December 31, 2017 and 2016 Assets 2017 2016 Cash and due from banks $ 4,325,582 $ 6,929,755 Interest-bearing deposits at financial institutions 601 651 Securities available for sale, at fair value 1,690,726 1,545,565 Loans/leases receivable, held for investment 1,710,000 - Investment in bank subsidiaries 410,105,525 345,866,288 Investment in nonbank subsidiaries 2,956,337 1,154,642 Premises and equipment, net 4,947,572 5,104,677 Other assets 11,630,304 15,245,521 Total assets $ 437,366,647 $ 375,847,099 Liabilities and Stockholders' Equity Liabilities: Other borrowings $ 31,000,000 $ 35,000,000 Junior subordinated debentures 37,486,487 33,480,202 Other liabilities 15,593,031 21,326,098 Total liabilities 84,079,518 89,806,300 Stockholders' Equity: Common stock 13,918,168 13,106,845 Additional paid-in capital 189,077,550 156,776,642 Retained earnings 151,962,661 118,616,901 Accumulated other comprehensive loss (1,671,250 ) (2,459,589 ) Total stockholders' equity 353,287,129 286,040,799 Total liabilities and stockholders' equity $ 437,366,647 $ 375,847,099 Condensed Statements of Income Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 Total interest income $ 12,802 $ 74,489 $ 69,774 Equity in net income of bank subsidiaries 45,103,593 33,467,712 22,059,086 Equity in net income of nonbank subsidiaries 75,344 32,674 32,823 Securities gains 6,312 37,596 262,800 Other 2,700 (2,933 ) (4,436 ) Total income 45,200,751 33,609,538 22,420,047 Interest expense 2,658,414 1,735,769 1,679,909 Salaries and employee benefits 5,021,998 4,607,887 4,847,507 Professional fees 1,344,721 949,442 1,121,094 Acquisition costs 1,068,918 1,400,004 - Post-acquisition compensation, transition and integration costs 3,151,384 313,598 - Gains on debt extinguishment - (1,200,000 ) (300,000 ) Other 1,134,139 988,057 949,041 Total expenses 14,379,574 8,794,757 8,297,551 Income before income tax benefit 30,821,177 24,814,781 14,122,496 Income tax benefit 4,885,330 2,872,006 2,805,385 Net income $ 35,706,507 $ 27,686,787 $ 16,927,881 Condensed Statements of Cash Flows Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 Cash Flows from Operating Activities: Net income $ 35,706,507 $ 27,686,787 $ 16,927,881 Adjustments to reconcile net income to net cash provided by operating activities: Earnings of bank subsidiaries (45,103,593 ) (33,467,712 ) (22,059,086 ) Earnings of nonbank subsidiaries (75,344 ) (32,674 ) (32,823 ) Distributions from bank subsidiaries 21,000,000 26,000,000 9,700,000 Distributions from nonbank subsidiaries 38,734 32,860 32,695 Accretion of acquisition fair value adjustments 149,010 136,150 137,317 Depreciation 225,947 222,256 174,757 Stock-based compensation expense 1,187,036 947,174 941,469 Securities gains, net (6,312 ) (37,596 ) (262,801 ) Gains on debt extinguishment - (1,200,000 ) (300,000 ) Decrease (increase) in other assets (968,808 ) (2,346,253 ) (5,929,110 ) (Decrease) increase in other liabilities (6,918,921 ) 5,105,251 5,502,390 Net cash provided by operating activities 5,234,256 23,046,243 4,832,689 Cash Flows from Investing Activities: Net increase in interest-bearing deposits at financial institutions 50 50 189,426 Activity in securities portfolio: Purchases - (3,873,060 ) (1,764,137 ) Calls, maturities and redemptions 6,312 3,800,000 1,772,719 Sales 31,713 132,738 489,828 Capital infusion, bank subsidiaries - - (45,600,000 ) Net cash paid for acquisitions (3,368,909 ) (80,000,000 ) - Purchase of premises and equipment (68,842 ) (824,498 ) (1,517,157 ) Net cash (used in) provided by investing activities (3,399,676 ) (80,764,770 ) (46,429,321 ) Cash Flows from Financing Activities: Activity in other borrowings: Proceeds from other borrowings 7,000,000 35,000,000 - Calls, maturities and scheduled principal payments (11,000,000 ) - (2,350,000 ) Prepayments - - (19,395,116 ) Retirement of junior subordinated debentures - (3,955,000 ) (1,762,000 ) Payment of cash dividends on common and preferred stock (2,494,260 ) (1,981,541 ) (782,054 ) Net proceeds from common stock offering, 3,680,000 shares issued - - 63,484,123 Net proceeds from common stock offering, 1,215,000 shares issued - 29,828,916 - Proceeds from issuance of common stock, net 2,055,507 2,105,774 1,552,673 Net cash provided by (used in) financing activities (4,438,753 ) 60,998,149 40,747,626 Net increase (decrease) in cash and due from banks (2,604,173 ) 3,279,622 (849,006 ) Cash and due from banks: Beginning 6,929,755 3,650,133 4,499,139 Ending $ 4,325,582 $ 6,929,755 $ 3,650,133

Note 21 - Fair Value

Note 21 - Fair Value	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	21. Accounting guidance on fair value measurements uses a hierarchy intended to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy includes three three ● Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in markets; ● Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument; and ● Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair value measurement Assets measured at fair value on a recurring basis comprise d the following at December 31, 2017 2016: Fair Value Measurements at Reporting Date Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Identical Assets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) December 31, 2017: Securities available for sale: U.S. govt. sponsored agency securities $ 38,096,534 $ - $ 38,096,534 $ - Residential mortgage-backed securities 163,301,304 - 163,301,304 - Municipal securities 66,625,496 - 66,625,496 - Other securities 4,884,573 1,028 4,883,545 - Interest rate caps 506,700 - 506,700 - Interest rate swaps - assets 4,397,238 - 4,397,238 Total assets measured at fair value $ 277,811,845 $ 1,028 $ 277,810,817 $ - Interest rate swaps - liabilities $ 4,397,238 $ - $ 4,397,238 $ - Total liabilities measured at fair value $ 4,397,238 $ - $ 4,397,238 $ - December 31, 2016: Securities available for sale: U.S. govt. sponsored agency securities $ 46,083,607 $ - $ 46,083,607 $ - Residential mortgage-backed securities 147,702,127 - 147,702,127 - Municipal securities 52,604,426 - 52,604,426 - Other securities 4,722,979 1,361 4,721,618 - Interest rate caps 576,527 - 576,527 - Interest rate swaps - assets 2,338,281 - 2,338,281 Total assets measured at fair value $ 254,027,947 $ 1,361 $ 254,026,586 $ - Interest rate swaps - liabilities $ 2,338,281 $ - $ 2,338,281 $ - Total liabilities measured at fair value $ 2,338,281 $ - $ 2,338,281 $ - There were no 1, 2, 3 years ended December 31, 2017 2016. A small portion of the securities available for sale portfolio consists of common stock issued by various unrelated bank holding companies and mutual funds. The fair values used by the Company are obtained from an independent pricing service, which represent quoted market prices for the identical securities (Level 1 The remainder of the securities available for sale portfolio consists of securities whereby the Company obtains fair values from an independent pricing service. The fair values are determined by pricing models that consider observable market data, such as interest rate volatilities, LIBOR yield curve, credit spreads and prices from market makers and live trading systems (Level 2 I nterest rate caps are used for the purpose of hedging interest rate risk. See Note 7 2 Interest rate swaps are executed for select commercial customers. The interest rate swaps are further described in Note 1 2 Certain financial assets are measured at fair value on a non-recurring basis; that is, the assets are not Assets measured at fair value on a non-recurring basis comprise d the following at December 31, 2017 2016: Fair Value Measurements at Reporting Date Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Identical Assets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) December 31, 2017: Impaired loans/leases $ 8,972,337 $ - $ - $ 8,972,337 Other real estate owned 14,642,973 - - 14,642,973 $ 23,615,310 $ - $ - $ 23,615,310 December 31, 2016: Impaired loans/leases $ 12,823,121 $ - $ - $ 12,823,121 Other real estate owned 5,964,952 - - 5,964,952 $ 18,788,073 $ - $ - $ 18,788,073 Impaired loans/leases are evaluated and valued at the time the loan/lease is identified as impaired, at the lower of cost or fair value , and are classified as a Level 3 may may Other real estate owned in the table above consists of property acquired through foreclosures and settlements of loans. Property acquired is carried at the estimated fair value of the property, less disposal costs, and is classified as a Level 3 ’s historical knowledge, changes in market conditions from the time of valuation, and/or management’s expertise and knowledge of the property. The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis for which the Company has utilized Level 3 Quantitative Information about Level Fair Value Measurements December 31, 2017 Fair Value December 31, 2016 Fair Value Valuation Technique Unobservable Input Range Impaired loans/leases $ 8,972,337 $ 12,823,121 Appraisal of collateral Appraisal adjustments -10.00% to -50.00% Other real estate owned 14,642,973 5,964,952 Appraisal of collateral Appraisal adjustments 0.00% to -35.00% For impaired loans/leases and other real estate owned, the Company records carrying value at fair value less disposal or selling costs. The amounts reported in the tables above are fair values before the adjustment for disposal or selling costs. There have been no s ended December 31, 2017 2016. The following table presents the carrying values and estimated fair values of financial assets and liabilities carried on the Company ’s consolidated balance sheet, including those financial assets and liabilities that are not Fair Value As of December 31, 2017 As of December 31, 2016 Hierarchy Carrying Estimated Carrying Estimated Level Value Fair Value Value Fair Value Cash and due from banks Level 1 $ 75,721,663 $ 75,721,663 $ 70,569,993 $ 70,569,993 Federal funds sold Level 2 30,197,000 30,197,000 22,257,000 22,257,000 Interest-bearing deposits at financial institutions Level 2 55,765,012 55,765,012 63,948,925 63,948,925 Investment securities: HTM Level 2 379,474,205 379,749,804 322,909,056 320,414,899 AFS See Previous Table 272,907,907 272,907,907 251,113,139 251,113,139 Loans/leases receivable, net Level 3 8,307,719 8,972,337 11,873,260 12,823,121 Loans/leases receivable, net Level 2 2,921,821,953 2,892,963,000 2,362,856,277 2,344,462,740 Interest rate caps Level 2 506,700 506,700 576,527 576,527 Interest rate swaps - assets Level 2 4,397,238 4,397,238 2,338,281 2,338,281 Deposits: Nonmaturity deposits Level 2 2,670,583,178 2,670,583,178 2,188,683,349 2,188,683,349 Time deposits Level 2 596,071,878 591,772,000 480,577,924 479,605,000 Short-term borrowings Level 2 13,993,122 13,993,122 39,971,387 39,971,387 FHLB advances Level 2 192,000,000 192,115,000 137,500,000 138,338,000 Other borrowings Level 2 66,000,000 66,520,000 80,000,000 81,282,000 Junior subordinated debentures Level 2 37,486,487 29,253,624 33,480,202 24,881,494 Interest rate swaps - liabilities Level 2 4,397,238 4,397,238 2,338,281 2,338,281 The methodologies for estimating the fair value of financial assets and liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above. For certain financial assets and liabilities, carrying value approximates fair value due to the nature of the financial instrument. These instruments include: cash and due from banks, federal funds sold, interest-bearing deposits at financial institutions, non-maturity deposits, and short-term borrowings. The Company used the following methods and assumptions in estimating the fair value of the following instruments: Securities held to maturity : The fair values are estimated using pricing models that consider certain observable market data and some observable inputs, such as rate and term. Loans/leases receivable : The fair values for all types of loans/leases are estimated using discounted cash flow analyses, using interest rates currently being offered for loans/leases with similar terms to borrowers with similar credit quality. The fair value of loans held for sale is based on quoted market prices of similar loans sold in the secondary market. Deposits : The fair values disclosed for demand deposits equal their carrying amounts, which represent the amount payable on demand. Fair values for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered on time deposits to a schedule of aggregate expected monthly maturities on time deposits. FHLB advances and junior subordinated debentures Other borrowings : The fair value for the wholesale repurchase agreements and fixed rate other borrowings is estimated using rates currently available for debt with similar terms and remaining maturities. The fair value for variable rate other borrowings is equal to its carrying value. Commitments to extend credit : The fair value of these commitments is not

Note 22 - Business Segment Info

Note 22 - Business Segment Information	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	22. Selected financial and descriptive information is required to be disclosed for reportable operating segments, applying a “management perspective” as the basis for identifying reportable segments. The management perspective is determined by the view that management takes of the segments within the Company when making operating decisions, allocating resources, and measuring performance. The segments of the Company have been defined by the structure of the Company’s internal organization, focusing on the financial information that the Company’s operating decision-makers routinely use to make decisions about operating matters. The Company ’s primary segment, Commercial Banking, is geographically divided by markets into the secondary segments which are the four The Company ’s Wealth Management segment represents trust and asset management and investment management and advisory services offered at the Company’s three No The Company ’s All Other segment includes the corporate operations of the parent and operations of all other consolidated subsidiaries and/or defined operating segments that fall below the segment reporting thresholds. Selected financial information on the Company's business segments, with all intercompany accounts and transactions eliminated, is presented as follows as of and for the years ended December 31, 2017, 2016, 2015: Commercial Banking QCBT CRBT Guaranty Bank* CSB RB&T Wealth Management All other Intercompany Eliminations Consolidated Total Twelve Months Ended December 31, 2017 Total revenue $ 58,055,715 $ 45,367,035 $ 1,806,078 $ 31,944,152 $ 18,035,971 $ 11,057,519 $ 232,660 $ (499,520 ) $ 165,999,610 Net interest income 46,407,078 31,042,302 1,551,356 27,020,674 12,707,651 - (2,663,780 ) - 116,065,281 Provision for loan/lease losses 3,908,919 1,050,000 - 2,783,000 728,000 - - - 8,469,919 Net income 22,095,055 10,712,174 346,835 7,047,671 2,660,364 2,241,494 (9,397,086 ) - 35,706,507 Goodwill 3,222,688 15,223,179 - 9,888,225 - - - - 28,334,092 Core deposit intangible - 3,693,592 - 5,385,361 - - - - 9,078,953 Total assets 1,541,777,558 1,307,376,687 - 670,516,373 461,650,765 - 28,267,478 (26,924,088 ) 3,982,664,773 Twelve Months Ended December 31, 2016 Total revenue $ 59,442,052 $ 37,242,901 $ - $ 11,406,291 $ 16,043,894 $ 9,156,948 $ 109,563 $ 4,100,975 $ 137,502,624 Net interest income 45,081,080 29,205,047 - 10,004,729 11,887,201 - (1,661,280 ) - 94,516,777 Provision for loan/lease losses 4,168,166 950,000 - 1,460,000 900,000 - - - 7,478,166 Net income 14,116,751 12,317,545 - 2,132,252 3,235,711 1,665,453 (5,780,925 ) - 27,686,787 Goodwill 3,222,688 - - 9,888,225 - - - - 13,110,913 Core deposit intangible - 1,271,897 - 6,109,316 - - - - 7,381,213 Total assets 1,395,785,241 913,055,738 - 600,075,798 391,154,780 - 34,998,902 (33,126,711 ) 3,301,943,748 Twelve Months Ended December 31, 2015 Total revenue $ 52,914,705 $ 37,593,652 $ - $ - $ 14,816,300 $ 9,103,173 $ 363,432 $ (424,688 ) $ 114,366,574 Net interest income 40,416,563 26,635,659 - - 10,854,637 - (1,610,135 ) - 76,296,724 Provision for loan/lease losses 4,367,234 1,750,000 - - 753,666 - - - 6,870,900 Net income 10,333,111 7,695,867 - - 2,402,522 1,627,586 (5,131,205 ) - 16,927,881 Goodwill 3,222,688 - - - - - - - 3,222,688 Core deposit intangible - 1,471,409 - - - - - - 1,471,409 Total assets 1,336,571,694 866,872,406 - - 367,471,639 - 27,605,704 (5,323,168 ) 2,593,198,275 * Represents financial results for Guaranty Bank for the period from October 1, 2017 December 2, 2017,

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of presentation : The acronyms and abbreviations identified below are used in the Notes to the Consolidated Financial Statements , as well as in the other sections of this Form 10 may Allowance: Allowance for estimated losses on loans/leases Goldman Sachs: Goldman Sachs and Company AOCI: Accumulated other comprehensive income (loss) HTM: Held to maturity AFS: Available for sale Iowa Superintendent: Iowa Superintendent of Banking ASC: Accounting Standards Codification LCR: Liquidity Coverage Ratio ASC 805: m2: m2 ASU: Accounting Standards Update MD&A: Management's Discussion & Analysis BHCA: Bank Holding Company Act of 1956 MSA: Metropolitan Statistical Area BOLI: Bank-owned life insurance NIM: Net interest margin Caps: Interest rate cap derivatives NPA: Nonperforming asset CFPB: Bureau of Consumer Financial Protection NPL: Nonperforming loan Community National: Community National Bancorporation NSFR: Net Stable Funding Ratio CNB: Community National Bank OREO: Other real estate owned CRA: Community Reinvestment Act OTTI: Other-than-temporary impairment CRBT: Cedar Rapids Bank & Trust Company PCAOB: Public Company Accounting Oversight Board CRE: Commercial real estate PCI: Purchased credit impaired CRE Guidance: Interagency Concentrations in Commercial Real Estate Provision: Provision for loan/lease losses Lending, Sound Risk Management Practices guidance PUD LOC: Public Unit Deposit Letter of Credit CSB: Community State Bank QCBT: Quad City Bank & Trust Company C&I: Commercial and industrial RB&T: Rockford Bank & Trust Company Dodd-Frank Act: Dodd-Frank Wall Street Reform and ROAA: Return on Average Assets Consumer Protection Act ROACE: Return on Average Common Equity IDFPR: Illinois Department of Financial & Professional Regulation ROAE: Return on Average Equity DGCL: Delaware General Corporation Law SBA: U.S. Small Business Administration DIF: Deposit Insurance Fund SBLF: Small Business Lending Fund EPS: Earnings per share SEC: Securities and Exchange Commission Exchange Act: Securities Exchange Act of 1934, SERPs: Supplemental Executive Retirement Plans FASB: Financial Accounting Standards Board TA: Tangible assets FDIC: Federal Deposit Insurance Corporation Tax Act: Tax Cuts and Jobs Act Federal Reserve: Board of Governors of the Federal Reserve System TCE: Tangible common equity FHLB: Federal Home Loan Bank TDRs: Troubled debt restructurings FICO: Financing Corporation TEY: Tax equivalent yield FRB: Federal Reserve Bank of Chicago The Company: QCR Holdings, Inc. FTEs: Full-time equivalents Treasury: U.S. Department of the Treasury GAAP: Generally Accepted Accounting Principles USA Patriot Act: Uniting and Strengthening America by Guaranty: Guaranty Bankshares, Ltd. Providing Appropriate Tools Required to Intercept and Guaranty Bank: Guaranty Bank and Trust Company Obstruct Terrorism Act of 2001 USDA: U.S. Department of Agriculture
Use of Estimates, Policy [Policy Text Block]	Accounting estimates : The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance, OTTI of securities, the fair value of financial instruments, and the fair value of assets acquired/liabilities assumed in a business combination.
Consolidation, Policy [Policy Text Block]	Principles of consolidation : The accompanying consolidated financial statements include the accounts of the Company and its subsidiaries, except those six not 12
Cash and Cash Equivalents, Policy [Policy Text Block]	Presentation of cash flows : For purposes of reporting cash flows, cash and due from banks include cash on hand and noninterest bearing amounts due from banks. Cash flows from federal funds sold, interest bearing deposits at financial institutions, loans/leases, deposits, and short-term borrowings are treated as net increases or decreases. Cash and due from banks : The subsidiary banks are required by federal banking regulations to maintain certain cash and due from bank reserves. The reserve requirement was approximately $41,803,000 $42,233,000 December 31, 2017 2016,
Marketable Securities, Policy [Policy Text Block]	Investment securities : Investment securities held to maturity are those debt securities that the Company has the ability and intent to hold until maturity regardless of changes in market conditions, liquidity needs, or changes in general economic conditions. Such securities are carried at cost adjusted for amortization of premiums and accretion of discounts. If the ability or intent to hold to maturity is not not All securities are evaluated to determine whether declines in fair value below their amortized cost are other-than-temporary. In estimating OTTI losses on AFS debt securities, management considers a number of factors including, but not 1 2 3 4 not not If the Company lacks the intent to sell the security, and it is not not
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	Loans receivable , held for sale
Finance, Loans and Leases Receivable, Policy [Policy Text Block]	Loans receivable, held for investment : Loans that management has the intent and ability to hold for the foreseeable future, or until pay-off or maturity occurs, are classified as held for investment. These loans are stated at the amount of unpaid principal adjusted for charge-offs, the allowance, and any deferred fees and/or costs on originated loans. Interest is credited to earnings as earned based on the principal amount outstanding. Deferred direct loan origination fees and/or costs are amortized as an adjustment of the related loan’s yield. As assets held for and used in the production of services, the origination and collection of these loans are classified as investing activities in the statement of cash flows. The Company discloses the allowance for credit losses (also known as the allowance) by portfolio segment, and credit quality information, impaired financing receivables, nonaccrual status, and TDRs by class of financing receivable. A portfolio segment is the level at which the Company develops and documents a systematic methodology to determine its allowance for credit losses. A class of financing receivable is a further disaggregation of a portfolio segment based on risk characteristics and the Company’s method for monitoring and assessing credit risk. See the following information and Note 4. The Company ’s portfolio segments are as follows: ● C&I ● CRE ● Residential real estate ● Installment and other consumer Direct financing leases are considered a segment within the overall loan/lease portfolio. The Company’s classes of loans receivable are as follows: ● C&I ● Owner-occupied CRE ● Commercial construction, land development, and other land loans that are not CRE ● Other non-owner-occupied CRE ● Residential real estate ● Installment and other consumer Direct financing leases are considered a class of financing receivable within the overall loan/lease portfolio. The accounting policies for direct financing leases are disclosed below. Generally , for all classes of loans receivable, loans are considered past due when contractual payments are delinquent for 31 For al l classes of loans receivable, loans will generally be placed on nonaccrual status when the loan has become 90 ● It becomes evident that the borrower will not not ; ● When full repayment of principal and interest is not ; ● When the loan is graded “doubtful” ; ● When the borrower files bankruptcy and an approved plan of reorganization or liquidation is not ; or ● When foreclosure action is initiated. When a loan is placed on nonaccrual status, income recognition is ceased. Previously recorded but uncollected amounts of interest on nonaccrual loans are reversed at the time the loan is placed on nonaccrual status. Generally, cash collected on nonaccrual loans is applied to principal. Should full collection of principal be expected, cash collected on nonaccrual loans can be recognized as interest income. For all classes of loans receivable, nonaccrual loans may ● The loan is current, and all principal and interest amounts contractually due have been made ; ● All principal and interest amounts contractually due, including past due payments, are reasonabl y assured of repayment within a reasonable period; and ● There is a period of minimum repayment performance, as follows, by the borrower in accordance with contractual terms: ○ Six months of repayment performance for contractual monthly payments, or ○ One year of repayment performance for contractual quarterly or semi-annual payments . Direct finance leases receivable, held for investment : The Company leases machinery and equipment to customers under leases that qualify as direct financing leases for financial reporting and as operating leases for income tax purposes. Under the direct financing method of accounting, the minimum lease payments to be received under the lease contract, together with the estimated unguaranteed residual values (approximately 3% 25% Lease income is recognized on the interest method. Residual value is the estimated fair market value of the equipment on lease at lease termination. In estimating the equipment’s fair value at lease termination, the Company relies on historical experience by equipment type and manufacturer and, where available, valuations by independent appraisers, adjusted for known trends. The Company ’s estimates are reviewed continuously to ensure reasonableness; however, the amounts the Company will ultimately realize could differ from the estimated amounts. If the review results in a lower estimate than had been previously established, a determination is made as to whether the decline in estimated residual value is other-than-temporary. If the decline in estimated unguaranteed residual value is judged to be other-than-temporary, the accounting for the transaction is revised using the changed estimate. The resulting reduction in the investment is recognized as a loss in the period in which the estimate is changed. An upward adjustment of the estimated residual value is not T he policies for delinquency and nonaccrual for direct financing leases are materially consistent with those described above for all classes of loan receivables. The Company defers and amortizes fees and certain incremental direct costs over the contractual term of the lease as an adjustment to the yield. These initial direct leasing costs generally approximate 5.5%
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	TDRs : TDRs exist when the Company, for economic or legal reasons related to the borrower’s/lessee’s financial difficulties, grants a concession (either imposed by court order, law, or agreement between the borrower/lessee and the Company) to the borrower/lessee that it would not The following criteria, related to granting a concession, together or separately, create a TDR: ● A modification of terms of a debt such as one ○ The reduction of the stated interest rate to a rate lower than the current market rate for new debt with similar risk. ○ The extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk. ○ The reduction of the face amount or maturity amount of the debt as stated in the instrument or other agreement. ○ The reduction of accrued interest. ● A transfer from the borrower /lessee to the Company of receivables from third ● The issuance or other granting of an equity position to the Company to fully or partially satisfy a debt unless the equity position is granted pursuant to existing terms for converting the debt into an equity position.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance : For all portfolio segments , the allowance is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans/leases in light of historical experience, the nature and volume of the loan/lease portfolio, adverse situations that may A discussion of the risk characteristics and the allowance by each portfolio segment follows: For C&I loans, the Company focuses on small and mid-sized businesses with primary operations as wholesalers, manufacturers, building contractors, business services companies, other banks, and retailers. The Company provides a wide range of C&I loans, including lines of credit for working capital and operational purposes, and term loans for the acquisition of facilities, equipment and other purposes. Approval is generally based on the following factors: ● Ability and stability of current management of the borrower; ● Stable earnings with positive financial trends; ● Sufficient cash flow to support debt repayment; ● Earnings projections based on reasonable assumptions; ● Financial strength of the industry and business; and ● Value and marketability of collateral. Collateral for C&I loans generally includes accounts receivable, inventory, equipment and real estate. The Company’s lending policy specifies approved collateral types and corresponding maximum advance percentages. The value of collateral pledged on loans must exceed the loan amount by a margin sufficient to absorb potential erosion of its value in the event of foreclosure and cover the loan amount plus costs incurred to convert it to cash. The Company’s lending policy specifies maximum term limits for C&I loans. For term loans, the maximum term is generally 7 3 5 365 In addition, the Company often takes personal guarantees or cosigners to help assure repayment. Loans may CRE loans are subject to underwriting standards and processes similar to C&I loans, in addition to those standards and processes specific to real estate loans. Collateral for CRE loans generally includes the underlying real estate and improvements, and may The Company’s lending policy also includes guidelines for real estate appraisals, including minimum appraisal standards based on certain transactions. In addition, the Company often takes personal guarantees to help assure repayment. In addition, management tracks the level of owner-occupied CRE loans versus non-owner occupied loans. Owner-occupied loans are generally considered to have less risk. As of December 31, 2017 2016, 26% 30%, The Company ’s lending policy incorporates regulatory guidelines which stipulate that non-owner occupied CRE lending in excess of 300% 100% December 31, 2017 2016, December 31, 2017, December 31, 2016. In some instances for all loans/leases, it may Company’s lending policy described above and below. In general, exceptions to the lending policy do not For C&I and CRE loans, the allowance consists of specific and general components. The specific component relates to loans that are classified as impaired , as defined below. For those loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan are lower than the carrying value of that loan. For C&I loans and all classes of CRE loans, a loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not The general component consists of quantitative and qualitative factors and covers non-impaired loans. The quantitative factors are based on historical charge-off experience and expected loss given default derived from the Company’s internal risk rating process. See below for a detailed description of the Company’s internal risk rating scale. The qualitative factors are determined based on an assessment of internal and/or external influences on credit quality that are not For C&I and CRE loans, the Company utilizes the following internal risk rating scale: 1 . Highest Quality (Pass) – loans of the highest quality with no 2 . Superior Quality (Pass) – loans with very strong credit quality. Borrowers have exceptionally strong earnings, liquidity, capital, cash flow coverage, and management ability. Includes loans secured by high quality marketable securities, certificates of deposit from other institutions, and cash value of life insurance. Also includes loans supported by U.S. government, state, or municipal guarantees. 3 . Satisfactory Quality (Pass) – loans with satisfactory credit quality. Established borrowers with satisfactory financial condition, including credit quality, earnings, liquidity, capital and cash flow coverage. Management is capable and experienced. Collateral coverage and guarantor support, if applicable, are more than adequate. Includes loans secured by personal assets and business assets, including equipment, accounts receivable, inventory, and real estate. 4 . Fair Quality (Pass) – loans with moderate but still acceptable credit quality. The primary repayment source remains adequate; however, management’s ability to maintain consistent profitability is unproven or uncertain. Borrowers exhibit acceptable leverage and liquidity. May 5 . Early Warning (Pass) – loans where the borrowers have generally performed as agreed, however unfavorable financial trends exist or are anticipated. Earnings may may may may 6 . Special Mention – loans where the borrowers exhibit credit weaknesses or unfavorable financial trends requiring close monitoring. Weaknesses and adverse trends are more pronounced than Early Warning loans, and if left uncorrected, may no not one 7 . Substandard – loans which are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if applicable. These loans have a well-defined weakness or weaknesses which jeopardize repayment according to the contractual terms. There is distinct loss potential if the weaknesses are not 8 . Doubtful – loans which have all the weaknesses inherent in a Substandard loan, with the added characteristic that existing weaknesses make full principal collection, on the basis of current facts, conditions and values, highly doubtful. The possibility of loss is extremely high, but because of pending factors, recognition of a loss is deferred until a more exact status can be determined. All doubtful loans will be placed on non-accrual, with all payments, including principal and interest, applied to principal reduction. The Company has certain loans risk-rated 7 not 7 not follow the same allowance methodology as it does for all other non-impaired, collectively evaluated loans. Rather, the Company performs a more detailed analysis including evaluation of the cash flow and collateral valuations. Based upon this evaluation, an estimate of the probable loss in this portfolio is collectively evaluated under ASC 450 20. 7 For term C&I and CRE loans greater than $1,000,000, 15 The Company’s Loan Quality area performs a documentation review of a sampling of C&I and CRE loans, the primary purpose of which is to ensure the credit is properly documented and closed in accordance with approval authorities and conditions. A review is also performed by the Company’s Internal Audit Department of a sampling of C&I and CRE loans for proper documentation, according to an approved schedule. Validation of the risk rating is also part of Internal Audit’s review (performed by Internal Loan Review). Additionally, over the past several years, the Company has contracted an independent outside third The Company leases machinery and equipment to C&I customers under direct financing leases. All lease requests are subject to the credit requirements and criteria as set forth in the lending/leasing policy. In all cases, a formal independent credit analysis of the lessee is performed. For direct financing leases, the allowance consists of specific and general components. The specific component relates to leases that are classified as impaired, as defined for commercial loans above. For those leases that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired lease is lower than the carrying value of that lease. The general component consists of quantitative and qualitative factors and covers nonimpaired leases. The quantitative factors are based on historical charge-off experience for the entire lease portfolio. The qualitative factors are determined based on an assessment of internal and/or external influences on credit quality that are not Generally, the Company’s residential real estate loans conform to the underwriting requirements of Freddie Mac and Fannie Mae to allow the subsidiary banks to resell loans in the secondary market. The subsidiary banks structure most loans that will not one five 15 not The Company provides many types of installment and other consumer loans including motor vehicle, home improvement, home equity, signature loans and small personal credit lines. The Company’s lending policy addresses specific credit guidelines by consumer loan type. For residential real estate loans, and installment and other consumer loans, these large groups of smaller balance homogenous loans are collectively evaluated for impairment. The Company applies a quantitative factor based on historical charge-off experience in total for each of these segments. Accordingly, the Company generally does not TDRs are considered impaired loans/leases and are subject to the same allowance methodology as described above for impaired loans/leases by portfolio segment. Once a loan is classified as a TDR, it will remain a TDR until the loan is paid off, charged off, moved to OREO or restructured into a new note without a concession. TDR status may
Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]	Credit related financial instruments : In the ordinary course of business, the Company has entered into commitments to extend credit and standby letters of credit. Such financial instruments are recorded when they are funded.
Transfers and Servicing of Financial Assets, Policy [Policy Text Block]	Transfers of financial assets : Transfers of financial assets are accounted for as sales only when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when: ( 1 2 no 3 not ● Pro-rata ownership in an entire financial asset . ● From the date of the transfer, all cash flows received from entire financial assets are divided proportionately among the participating interest holders in an amount equal to their share of ownership. ● The rights of each participating interest holder have the same priority, and no ’s interest is subordinated to the interest of another participating interest holder. That is, no ● No
Bankowned Life Insurance [Policy Text Block]	BOLI : BOLI is carried at cash surrender value with increases/decreases reflected as income/expense in the statement of income.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and equipment : Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed primarily by the straight-line method over the estimated useful lives of the assets.
Restricted Investment Securities [Policy Text Block]	Restricted investment securities : Restricted investment securities represent FHLB and FRB common stock. The stock is carried at cost. These equity securities are “restricted” in that they can only be sold back to the respective institution or another member institution at par. Therefore, they are less liquid than other tradable equity securities. The Company views its investment in restricted stock as a long-term investment. Accordingly, when evaluating for impairment, the value is determined based on the ultimate recovery of the par value, rather than recognizing temporary declines in value. There have been no
Real Estate, Policy [Policy Text Block]	OREO : Real estate acquired through, or in lieu of, loan foreclosures, is held for sale and initially recorded at fair value less costs to sell, establishing a new cost basis. Any writedown to fair value taken at the time of foreclosure is charged to the allowance. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less costs to sell. Subsequent write-downs to fair value are charged to earnings.
Repossessed Assets [Policy Text Block]	Repossessed assets : Equipment or other non-real estate property acquired through, or in lieu of foreclosure, is held for sale and initially recorded at fair value less costs to sell.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill : The Company recorded goodwill totaling $3,222,688 80% m2 August 2005. $9,888,225 2016. not September 30, 2017, not $15,223,179 2017. 2 not 2018.
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Core deposit intangible : The Company has recorded a core deposit intangible from historical acquisitions including CNB, CSB and Guaranty Bank. The core deposit intangible was the portion of the acquisition purchase price which represented the value assigned to the existing deposit base at acquisition. See Notes 2 7 ten
Swap Transactions Policy [Policy Text Block]	Swap transactions : The Company offers a loan swap program to certain commercial loan customers. Through this program, the Company originates a variable rate loan with the customer. The Company and the swap customer will then enter into a fixed interest rate swap. Lastly, an identical offsetting swap is entered into by the Company with a counterparty. These “back-to-back” swap arrangements are intended to offset each other and allow the Company to book a variable rate loan, while providing the customer with a contract for fixed interest payments. In these arrangements, the Company’s net cash flow is equal to the interest income received from the variable rate loan originated with the customer. These customer swaps are not $3.1 $1.7 $1.7 December 31, 2017, 2016 2015,
Derivatives, Policy [Policy Text Block]	Derivatives and hedging activities : The Company enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one one The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: ( 1 2 short-term fixed rate liabilities. Interest rate caps are valued by the transaction counterparty on a monthly basis and corroborated by a third ASC 815,
Stockholders' Equity, Policy [Policy Text Block]	Preferred stock : The Company currently has 250,000 none December 31, 2017 2016. Treasury s tock 2015.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-based compensation plans: The Company accounts for stock-based compensation with measurement of compensation cost for all stock-based awards at fair value on the grant date and recognition of compensation over the requisite service period for awards expected to vest. As discussed in Note 15, December 31, 2017, 2016, 2015, $1,187,035, $947,174 $941,469, The Company use s the Black-Scholes option pricing model to estimate the fair value of stock option grants with the following assumptions for the indicated periods: 2017 2016 201 5 Dividend yield 0.36% to 0.47% 0.35% to 0.51% 0.37% to 0.46% Expected volatilit y 29.64% to 29.95% 29.32% to 29.37% 28.92% to 29.32% Risk-free interest rate 2.50% to 2.81% 1.73% to 2.18% 1.89% to 2.37% Expected life of option grants (in years) 6 6 6 Weighted-average grant date fair value $14.75 $7.31 $5.11 The Compan y also uses the Black-Scholes option pricing model to estimate the fair value of stock purchase grants with the following assumptions for the indicated periods: 2017 2016 20 15 Dividend yield 0.37% to 0.42% 0.33% to 0.59% 0.37% to 0.45% Expect ed volatility 19.80% to 19.86% 12.70% to 15.60% 8.81% to 13.10% Risk-free interest rate 0.67% to 1.18% 0.39% to 0.57% 0.09% to .016% Expected life of purchase grants (in months) 3 to 6 3 to 6 3 to 6 Weighted-average grant date fair value $6.42 $3.28 $2.39 The fair value is amortized on a straight-line basis over the vesting periods of the grants and will be adjusted for subsequent changes in estimated forfeitures. The expected dividend yield assumption is based on the Company's current expectations about its anticipated dividend policy. Expected volatility is based on historical volatility of the Company's common stock price. The risk-free interest rate for periods within the contractual life of the option or purchase is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected life of the option and purchase grants is derived using the “simplified” method and represents the period of time that options and purchases are expected to be outstanding. Historical data is used to estimate forfeitures used in the model. Two separate groups of employees (employees subject to broad based grants, and executive employees and directors) are used. As of December 31, 2017, $961,972 1.92 The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company's common stock for the 495,004 December 31, 2017. December 31, 2017 $13.2 $10.5 December 31, 2017, 2016 2015, $1,055,193, $1,525,902, $480,354, Restricted stock awards granted may not not All restricted share awards are classified as equity awards. The grant-date fair value of equity-classified restricted stock awards is amortized as compensation expense on a straight-line basis over the period restrictions lapse. As of December 31, 2017, 1,210,425 2.60
Income Tax, Policy [Policy Text Block]	Income taxes : The Company files its tax return on a consolidated basis with its subsidiaries. The entities follow the direct reimbursement method of accounting for income taxes under which income taxes or credits which result from the inclusion of the subsidiaries in the consolidated tax return are paid to or received from the parent company. Deferred income taxes are provided under the liability method whereby deferred tax assets are recognized for deductible temporary differences and net operating loss and tax credit carryforwards and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax basis. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not not ects of changes in tax laws and rates on the date of enactment. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not likely than not 50 Interest and penalties associated with unrecognized tax benefits are classified as additional income taxes in the statement s of income.
Trust Assets [Policy Text Block]	Trust assets : Trust assets held by the subsidiary banks in a fiduciary, agency, or custodial capacity for their customers, other than cash on deposit at the subsidiary banks, are not not
Earnings Per Share, Policy [Policy Text Block]	Earnings per share : See Note 17
Reclassification, Policy [Policy Text Block]	Reclassifications : Certain amounts in the prior year financial statements have been reclassified, with no
New Accounting Pronouncements, Policy [Policy Text Block]	New accounting pronouncements: In May 2014, 2014 09, Revenue from Contracts with Customers 2014 09 2014 09 2014 09 January 1, 2017, 2015 14 2014 09 January 1, 2018 no In January 2016, 2016 01, Financial Instruments – Overall 2016 01 2016 01was January 1, 2018 no In February 2016, 2016 02, Leases 2016 02, 2016 02. 2016 02 December 15, 2018, Effective January 1, 2017. ASU 2016 09, Compensation – Stock Compensation $1.2 2017. In June 2016, 2016 13, Financial Instruments – Credit Losses 2016 13 December 15, 2019, may December 15, 2018, In February 2018, 2018 02, Income Statement – Reporting Comprehensive Income (Topic 220 one 2018 02 December 15, 2018, may not February 14, 2018. 2018 02 December 31, 2017. 2017 $304

Note 1 - Nature of Business a32

Note 1 - Nature of Business and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2017 2016 201 5 Dividend yield 0.36% to 0.47% 0.35% to 0.51% 0.37% to 0.46% Expected volatilit y 29.64% to 29.95% 29.32% to 29.37% 28.92% to 29.32% Risk-free interest rate 2.50% to 2.81% 1.73% to 2.18% 1.89% to 2.37% Expected life of option grants (in years) 6 6 6 Weighted-average grant date fair value $14.75 $7.31 $5.11 2017 2016 20 15 Dividend yield 0.37% to 0.42% 0.33% to 0.59% 0.37% to 0.45% Expect ed volatility 19.80% to 19.86% 12.70% to 15.60% 8.81% to 13.10% Risk-free interest rate 0.67% to 1.18% 0.39% to 0.57% 0.09% to .016% Expected life of purchase grants (in months) 3 to 6 3 to 6 3 to 6 Weighted-average grant date fair value $6.42 $3.28 $2.39

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	As of October 1, 2017 ASSETS Cash and due from banks $ 4,434,511 Interest-bearing deposits at financial institutions 3,953,907 Securities 49,703,419 Loans/leases receivable, net 192,517,677 Premises and equipment 4,808,343 Restricted investment securities 476,500 Core deposit intangible 2,698,301 Other assets 997,810 Total assets acquired $ 259,590,468 LIABILITIES Deposits $ 212,467,514 Short-term borrowings 13,102,043 FHLB advances 4,108,027 Junior subordinated debentures 3,857,275 Other liabilities 2,595,883 Total liabilities assumed 236,130,742 Net assets acquired $ 23,459,726 CONSIDERATION PAID: Cash $ 7,803,420 Common stock 30,879,485 Total consideration paid 38,682,905 Goodwill $ 15,223,179 As of August 31, 2016 ASSETS Cash and due from banks $ 10,094,645 Federal funds sold 698,000 Interest-bearing deposits at financial institutions 14,730,157 Securities 102,640,029 Loans/leases receivable, net 419,029,277 Premises and equipment 20,684,880 Core deposit intangible 6,352,653 Restricted investment securities 1,512,900 Other real estate owned 650,000 Other assets 5,283,937 Total assets acquired $ 581,676,478 LIABILITIES Deposits $ 486,298,262 FHLB advances 20,368,877 Other liabilities 4,897,564 Total liabilities assumed $ 511,564,703 Net assets acquired $ 70,111,775 CONSIDERATION PAID: Cash $ 80,000,000 Total consideration paid $ 80,000,000 Goodwill $ 9,888,225
Business Combination, Purchased Loans as of The Acquisition Date [Table Text Block]	PCI Performing Loans Loans Total Contractually required principal payments $ 3,126,327 $ 192,982,439 $ 196,108,766 Nonaccretable discount (1,147,198 ) - (1,147,198 ) Principal cash flows expected to be collected 1,979,129 192,982,439 194,961,568 Accretable discount (219,902 ) (2,223,989 ) (2,443,891 ) Fair Value of acquired loans $ 1,759,227 $ 190,758,450 $ 192,517,677 PCI Performing Loans Loans Total Contractually required principal payments $ 8,349,688 $ 427,398,400 $ 435,748,088 Nonaccretable discount (4,525,223 ) - (4,525,223 ) Principal cash flows expected to be collected $ 3,824,465 $ 427,398,400 $ 431,222,865 Accretable discount (277,579 ) (11,916,009 ) (12,193,588 ) Fair Value of acquired loans $ 3,546,886 $ 415,482,391 $ 419,029,277
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Table Text Block]	For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (219,902 ) (2,223,989 ) (2,443,891 ) Accretion recognized 54,070 26,836 80,906 Balance at the end of the period $ (165,832 ) $ (2,197,153 ) $ (2,362,985 ) For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) Accretion recognized 169,006 5,032,692 5,201,698 Balance at the end of the period $ (25,300 ) $ (4,082,922 ) $ (4,108,222 ) For the year ended December 31, 2016 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (277,579 ) (11,916,009 ) (12,193,588 ) Accretion recognized 83,273 2,800,395 2,883,668 Balance at the end of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 )
Business Acquisition, Pro Forma Information [Table Text Block]	Year Ended December 31, 2017 2016 (dollars in thousands, except per share data) Net interest income $ 122,923 $ 102,902 Noninterest income $ 32,703 $ 34,238 Net income $ 38,728 $ 27,103 Earnings per common share: Basic $ 2.80 $ 2.05 Diluted $ 2.73 $ 2.02 Year Ended December 31, 2016 2015 (dollars in thousands, except per share data) Net interest income $ 110,035 $ 98,483 Noninterest income $ 34,773 $ 31,051 Net income $ 34,137 $ 22,118 Earnings per common share: Basic $ 2.62 $ 1.91 Diluted $ 2.58 $ 1.89

Note 3 - Investment Securities

Note 3 - Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Unrealized Gain (Loss) on Investments [Table Text Block]	Gross Gross Amortized Unrealized Unrealized Fair Cost Gains (Losses) Value December 31, 2017: Securities held to maturity: Municipal securities $ 378,424,205 $ 2,763,718 $ (2,488,119 ) $ 378,699,804 Other securities 1,050,000 - - 1,050,000 $ 379,474,205 $ 2,763,718 $ (2,488,119 ) $ 379,749,804 Securities available for sale: U.S. govt. sponsored agency securities $ 38,409,157 $ 37,344 $ (349,967 ) $ 38,096,534 Residential mortgage-backed and related securities 165,459,470 155,363 (2,313,529 ) 163,301,304 Municipal securities 66,176,364 660,232 (211,100 ) 66,625,496 Other securities 4,014,004 896,384 (25,815 ) 4,884,573 $ 274,058,995 $ 1,749,323 $ (2,900,411 ) $ 272,907,907 December 31, 2016: Securities held to maturity: Municipal securities $ 321,859,056 $ 2,200,577 $ (4,694,734 ) $ 319,364,899 Other securities 1,050,000 - - 1,050,000 $ 322,909,056 $ 2,200,577 $ (4,694,734 ) $ 320,414,899 Securities available for sale: U.S. govt. sponsored agency securities $ 46,281,306 $ 132,886 $ (330,585 ) $ 46,083,607 Residential mortgage-backed and related securities 150,465,222 174,993 (2,938,088 ) 147,702,127 Municipal securities 52,816,541 425,801 (637,916 ) 52,604,426 Other securities 4,046,332 703,978 (27,331 ) 4,722,979 $ 253,609,401 $ 1,437,658 $ (3,933,920 ) $ 251,113,139
Schedule of Unrealized Loss on Investments [Table Text Block]	Less than 12 Months 12 Months or More Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses December 31, 2017: Securities held to maturity: Municipal securities $ 23,750,826 $ (354,460 ) $ 72,611,780 $ (2,133,659 ) $ 96,362,606 $ (2,488,119 ) Securities available for sale: U.S. govt. sponsored agency securities $ 28,576,258 $ (200,022 ) $ 3,640,477 $ (149,945 ) $ 32,216,735 $ (349,967 ) Residential mortgage-backed and related securities 88,927,779 (871,855 ) 57,931,731 (1,441,674 ) 146,859,510 (2,313,529 ) Municipal securities 10,229,337 (41,151 ) 9,997,433 (169,949 ) 20,226,770 (211,100 ) Other securities 923,535 (25,815 ) - - 923,535 (25,815 ) $ 128,656,909 $ (1,138,843 ) $ 71,569,641 $ (1,761,568 ) $ 200,226,550 $ (2,900,411 ) December 31, 2016: Securities held to maturity: Municipal securities $ 122,271,533 $ (4,076,647 ) $ 13,010,803 $ (618,087 ) $ 135,282,336 $ (4,694,734 ) Securities available for sale: U.S. govt. sponsored agency securities $ 21,788,139 $ (257,640 ) $ 5,499,012 $ (72,945 ) $ 27,287,151 $ (330,585 ) Residential mortgage-backed and related securities 121,506,582 (2,641,664 ) 7,437,615 (296,424 ) 128,944,197 (2,938,088 ) Municipal securities 34,152,822 (618,462 ) 338,099 (19,454 ) 34,490,921 (637,916 ) Other securities 3,177,414 (27,331 ) - - 3,177,414 (27,331 ) $ 180,624,957 $ (3,545,097 ) $ 13,274,726 $ (388,823 ) $ 193,899,683 $ (3,933,920 )
Realized Gain (Loss) on Investments [Table Text Block]	2017 2016 2015 Proceeds from sales of securities $ 71,091,580 $ 134,188,737 $ 81,410,368 Gross gains from sales of securities 67,351 4,845,009 1,045,444 Gross losses from sales of securities (155,236 ) (252,611 ) (246,461 )
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Cost Fair Value Securities held to maturity: Due in one year or less $ 2,912,158 $ 2,909,816 Due after one year through five years 20,838,734 20,896,388 Due after five years 355,723,313 355,943,600 $ 379,474,205 $ 379,749,804 Securities available for sale: Due in one year or less $ 1,991,755 $ 1,996,584 Due after one year through five years 26,984,843 26,986,584 Due after five years 75,608,923 75,738,862 $ 104,585,521 $ 104,722,030 Residential mortgage-backed and related securities 165,459,470 163,301,304 Other securities 4,014,004 4,884,573 $ 274,058,995 $ 272,907,907 Amortized Cost Fair Value Securities held to maturity: Municipal securities $ 208,103,672 $ 208,961,233 Securities available for sale: U.S. govt. sponsored agency securities 5,048,756 4,988,073 Municipal securities 57,554,280 57,817,498 $ 62,603,036 $ 62,805,571
Schedule of Investment in Bond Securities [Table Text Block]	December 31, 2017: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 20 $ 19,328,700 $ 19,514,024 $ 975,701 Iowa 16 13,881,689 13,969,512 873,095 Missouri 17 9,243,355 9,308,287 547,546 North Dakota 7 21,626,574 21,724,197 3,103,457 Ohio 9 8,002,705 7,938,028 882,003 Texas 17 11,253,775 11,308,848 665,226 Other 45 24,000,278 24,215,119 538,114 Total general obligation bonds 131 $ 107,337,076 $ 107,978,015 $ 824,260 December 31, 2016: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 19 $ 29,214,559 $ 29,308,438 $ 1,542,549 Iowa 27 32,258,612 32,231,936 1,193,775 Missouri 14 8,291,192 8,323,245 594,518 North Dakota 7 22,169,050 21,499,075 3,071,296 Ohio 8 6,790,398 6,651,897 831,487 Other 41 18,481,496 18,458,044 450,196 Total general obligation bonds 116 $ 117,205,307 $ 116,472,635 $ 1,004,074 December 31, 2017: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Illinois 2 $ 17,211,441 $ 17,408,544 $ 8,704,272 Indiana 26 51,171,818 50,861,336 1,956,205 Iowa 29 68,724,899 69,079,470 2,382,051 Kansas 6 12,873,329 12,877,087 2,146,181 Missouri 56 106,259,015 106,232,837 1,897,015 North Dakota 5 11,451,560 11,351,676 2,270,335 Ohio 10 55,766,091 55,820,203 5,582,020 Other 11 13,805,340 13,716,132 1,246,921 Total revenue bonds 145 $ 337,263,493 $ 337,347,285 $ 2,326,533 December 31, 2016: U.S. State: Number of Issuers Amortized Cost Fair Value Average Exposure Per Issuer (Fair Value) Indiana 22 $ 47,994,737 $ 47,582,138 $ 2,162,824 Iowa 31 70,788,393 71,142,393 2,294,916 Kansas 6 13,476,366 13,427,491 2,237,915 Missouri 47 90,784,441 89,664,013 1,907,745 North Dakota 4 8,089,067 7,796,381 1,949,095 Ohio 3 13,650,000 13,405,222 4,468,407 Other 7 12,687,286 12,479,052 1,782,722 Total revenue bonds 120 $ 257,470,290 $ 255,496,690 $ 2,129,139

Note 4 - Loans Leases Receiva35

Note 4 - Loans Leases Receivable (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	2017 2016 C&I loans $ 1,134,516,315 $ 827,637,263 CRE loans Owner-occupied CRE 332,742,477 332,387,621 Commercial construction, land development, and other land 186,402,404 165,149,491 Other non owner-occupied CRE 784,347,000 595,921,748 1,303,491,882 1,093,458,860 Direct financing leases * 141,448,232 165,419,360 Residential real estate loans ** 258,646,265 229,233,104 Installment and other consumer loans 118,610,799 81,665,695 2,956,713,493 2,397,414,282 Plus deferred loan/lease origination costs, net of fees 7,771,907 8,072,703 2,964,485,400 2,405,486,985 Less allowance (34,355,728 ) (30,757,448 ) $ 2,930,129,672 $ 2,374,729,537 * Direct financing leases: Net minimum lease payments to be received $ 156,583,887 $ 184,274,802 Estimated unguaranteed residual values of leased assets 929,932 1,085,154 Unearned lease/residual income (16,065,587 ) (19,940,596 ) 141,448,232 165,419,360 Plus deferred lease origination costs, net of fees 4,624,027 5,881,778 146,072,259 171,301,138 Less allowance (2,382,098 ) (3,111,898 ) $ 143,690,161 $ 168,189,240
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule Non-Aggregated [Table Text Block]	For the year ended December 31, 2017 PCI Performing Loans Loans Total Balance at the beginning of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 ) Discount added at acquisition (219,902 ) (2,223,989 ) (2,443,891 ) Accretion recognized 223,076 5,059,528 5,282,604 Balance at the end of the period $ (191,132 ) $ (6,280,075 ) $ (6,471,207 ) For the year ended December 31, 2016 PCI Performing Loans Loans Total Balance at the beginning of the period $ - $ - $ - Discount added at acquisition (277,579 ) (11,916,009 ) (12,193,588 ) Accretion recognized 83,273 2,800,395 2,883,668 Balance at the end of the period $ (194,306 ) $ (9,115,614 ) $ (9,309,920 )
Past Due Financing Receivables [Table Text Block]	2017 Classes of Loans/Leases Current 30-59 Days Past Due 60-89 Days Past Due Accruing Past Due 90 Days or More Nonaccrual Loans/Leases Total C&I $ 1,124,734,486 $ 8,306,829 $ 243,647 $ - $ 1,231,353 $ 1,134,516,315 CRE Owner-Occupied CRE 331,868,142 540,435 - - 333,900 332,742,477 Commercial Construction, Land Development, and Other Land 181,558,092 - - - 4,844,312 186,402,404 Other Non Owner-Occupied CRE 782,526,249 572,877 4,146 - 1,243,728 784,347,000 Direct Financing Leases 137,708,397 1,305,191 259,600 - 2,175,044 141,448,232 Residential Real Estate 253,261,821 3,552,709 393,410 74,519 1,363,806 258,646,265 Installment and Other Consumer 117,773,259 517,537 56,760 14,152 249,091 118,610,799 $ 2,929,430,446 $ 14,795,578 $ 957,563 $ 88,671 $ 11,441,234 $ 2,956,713,493 As a percentage of total loan/lease portfolio 99.08 % 0.50 % 0.03 % 0.00 % 0.39 % 100.00 % 2016 Classes of Loans/Leases Current 30-59 Days Past Due 60-89 Days Past Due Accruing Past Due 90 Days or More Nonaccrual Loans/Leases Total C&I $ 821,637,507 $ 1,455,185 $ 10,551 $ 346,234 $ 4,187,786 $ 827,637,263 CRE Owner-Occupied CRE 331,812,571 - 242,902 - 332,148 332,387,621 Commercial Construction, Land Development, and Other Land 160,760,034 35,638 - - 4,353,819 165,149,491 Other Non Owner-Occupied CRE 594,384,926 100,673 - - 1,436,149 595,921,748 Direct Financing Leases 161,452,627 730,627 574,700 215,225 2,446,181 165,419,360 Residential Real Estate 227,023,552 473,478 365,581 294,854 1,075,639 229,233,104 Installment and Other Consumer 81,199,766 204,973 63,111 110,501 87,344 81,665,695 $ 2,378,270,983 $ 3,000,574 $ 1,256,845 $ 966,814 $ 13,919,066 $ 2,397,414,282 As a percentage of total loan/lease portfolio 99.20 % 0.13 % 0.05 % 0.04 % 0.58 % 100.00 %
Schedule of Nonperforming Loans Leases [Table Text Block]	2017 Classes of Loans/Leases Accruing Past Due 90 Days or More Nonaccrual Loans/Leases * Accruing TDRs Total NPLs Percentage of Total NPLs C&I $ - $ 1,231,353 $ 5,224,182 $ 6,455,535 34.63 % CRE Owner-Occupied CRE - 333,900 107,322 441,222 2.37 % Commercial Construction, Land Development, and Other Land - 4,844,312 - 4,844,312 25.99 % Other Non Owner-Occupied CRE - 1,243,728 - 1,243,728 6.67 % Direct Financing Leases - 2,175,044 1,494,448 3,669,492 19.68 % Residential Real Estate 74,519 1,363,806 272,493 1,710,818 9.18 % Installment and Other Consumer 14,152 249,091 14,027 277,270 1.49 % $ 88,671 $ 11,441,234 $ 7,112,472 $ 18,642,377 100.00 % 2016 Classes of Loans/Leases Accruing Past Due 90 Days or More Nonaccrual Loans/Leases ** Accruing TDRs Total NPLs Percentage of Total NPLs C&I $ 346,234 $ 4,187,786 $ 4,733,997 $ 9,268,017 43.65 % CRE Owner-Occupied CRE - 332,148 - 332,148 1.56 % Commercial Construction, Land Development, and Other Land - 4,353,819 - 4,353,819 20.51 % Other Non Owner-Occupied CRE - 1,436,149 - 1,436,149 6.77 % Direct Financing Leases 215,225 2,446,181 1,008,244 3,669,650 17.28 % Residential Real Estate 294,854 1,075,639 585,541 1,956,034 9.21 % Installment and Other Consumer 110,501 87,344 18,746 216,591 1.02 % $ 966,814 $ 13,919,066 $ 6,346,528 $ 21,232,408 100.00 %
Allowance for Credit Losses on Financing Receivables [Table Text Block]	Year Ended December 31, 2017 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Provisions charged to expense 2,736,296 4,044,460 1,369,624 197,034 122,505 8,469,919 Loans/leases charged off (1,149,790 ) (1,795,229 ) (2,284,910 ) (102,088 ) (41,196 ) (5,373,213 ) Recoveries on loans/leases previously charged off 191,420 42,848 185,486 29,141 52,679 501,574 Balance, ending $ 14,323,036 $ 13,962,688 $ 2,382,098 $ 2,466,431 $ 1,221,475 $ 34,355,728 Year Ended December 31, 2016 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 10,484,080 $ 9,375,117 $ 3,395,088 $ 1,790,150 $ 1,096,471 $ 26,140,906 Provisions (credits) charged to expense 2,478,912 2,286,953 2,127,463 628,114 (43,276 ) 7,478,166 Loans/leases charged off (527,152 ) (24,304 ) (2,503,417 ) (76,820 ) (112,490 ) (3,244,183 ) Recoveries on loans/leases previously charged off 109,270 32,843 92,764 900 146,782 382,559 Balance, ending $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Year Ended December 31, 2015 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Balance, beginning $ 8,833,832 $ 8,353,386 $ 3,359,400 $ 1,525,952 $ 1,001,795 $ 23,074,365 Provisions charged to expense 1,470,526 3,080,611 1,688,031 430,087 201,645 6,870,900 Loans/leases charged off (453,782 ) (2,560,749 ) (1,788,772 ) (169,996 ) (251,838 ) (5,225,137 ) Recoveries on loans/leases previously charged off 633,504 501,869 136,429 4,107 144,869 1,420,778 Balance, ending $ 10,484,080 $ 9,375,117 $ 3,395,088 $ 1,790,150 $ 1,096,471 $ 26,140,906 2017 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Allowance for impaired loans/leases $ 715,627 $ 1,429,460 $ 504,469 $ 355,167 $ 38,596 $ 3,043,319 Allowance for nonimpaired loans/leases 13,607,409 12,533,228 1,877,629 2,111,264 1,182,879 31,312,409 $ 14,323,036 $ 13,962,688 $ 2,382,098 $ 2,466,431 $ 1,221,475 $ 34,355,728 Impaired loans/leases $ 6,248,209 $ 6,529,262 $ 3,669,492 $ 1,704,846 $ 202,354 $ 18,354,163 Nonimpaired loans/leases 1,128,268,106 1,296,962,620 137,778,740 256,941,419 118,408,445 2,938,359,330 $ 1,134,516,315 $ 1,303,491,882 $ 141,448,232 $ 258,646,265 $ 118,610,799 $ 2,956,713,493 Allowance as a percentage of impaired loans/leases 11.45 % 21.89 % 13.75 % 20.83 % 19.07 % 16.58 % Allowance as a percentage of nonimpaired loans/leases 1.21 % 0.97 % 1.36 % 0.82 % 1.00 % 1.07 % Total allowance as a percentage of total loans/leases 1.26 % 1.07 % 1.68 % 0.95 % 1.03 % 1.16 % 2016 C&I CRE Direct Financing Leases Residential Real Estate Installment and Other Consumer Total Allowance for impaired loans/leases $ 1,771,537 $ 693,919 $ 848,919 $ 289,112 $ 39,481 $ 3,642,968 Allowance for nonimpaired loans/leases 10,773,573 10,976,690 2,262,979 2,053,232 1,048,006 27,114,480 $ 12,545,110 $ 11,670,609 $ 3,111,898 $ 2,342,344 $ 1,087,487 $ 30,757,448 Impaired loans/leases $ 8,936,451 $ 6,112,114 $ 3,256,264 $ 1,661,180 $ 106,090 $ 20,072,099 Nonimpaired loans/leases 818,700,812 1,087,346,746 162,163,096 227,571,924 81,559,605 2,377,342,183 $ 827,637,263 $ 1,093,458,860 $ 165,419,360 $ 229,233,104 $ 81,665,695 $ 2,397,414,282 Allowance as a percentage of impaired loans/leases 19.82 % 11.35 % 26.07 % 17.40 % 37.21 % 18.15 % Allowance as a percentage of nonimpaired loans/leases 1.32 % 1.01 % 1.40 % 0.90 % 1.28 % 1.14 % Total allowance as a percentage of total loans/leases 1.52 % 1.07 % 1.88 % 1.02 % 1.33 % 1.28 %
Impaired Financing Receivables [Table Text Block]	2017 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 1,634,269 $ 1,644,706 $ - $ 1,406,310 $ 71,183 $ 71,183 CRE Owner-Occupied CRE 289,261 289,261 - 79,317 11,902 11,902 Commercial Construction, Land Development, and Other Land - - - - - - Other Non Owner-Occupied CRE 1,171,565 1,171,565 - 1,176,738 - - Direct Financing Leases 2,944,540 2,944,540 - 2,879,695 132,167 132,167 Residential Real Estate 943,388 1,018,167 - 685,807 1,161 1,161 Installment and Other Consumer 134,245 134,245 - 126,474 - - $ 7,117,268 $ 7,202,484 $ - $ 6,354,341 $ 216,413 $ 216,413 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 4,613,940 $ 4,617,879 $ 715,627 $ 4,584,142 $ 203,221 $ 203,221 CRE Owner-Occupied CRE 151,962 151,962 48,462 221,260 - - Commercial Construction, Land Development, and Other Land 4,844,312 4,844,312 1,379,235 4,447,831 - - Other Non Owner-Occupied CRE 72,163 72,163 1,763 44,667 - - Direct Financing Leases 724,953 724,953 504,469 625,107 - - Residential Real Estate 761,458 761,458 355,167 549,286 14,990 14,990 Installment and Other Consumer 68,109 68,109 38,596 40,152 410 410 $ 11,236,897 $ 11,240,836 $ 3,043,319 $ 10,512,445 $ 218,621 $ 218,621 Total Impaired Loans/Leases: C&I $ 6,248,209 $ 6,262,585 $ 715,627 $ 5,990,452 $ 274,404 $ 274,404 CRE Owner-Occupied CRE 441,222 441,222 48,462 300,577 11,902 11,902 Commercial Construction, Land Development, and Other Land 4,844,312 4,844,312 1,379,235 4,447,831 - - Other Non Owner-Occupied CRE 1,243,728 1,243,728 1,763 1,221,405 - - Direct Financing Leases 3,669,492 3,669,492 504,469 3,504,802 132,167 132,167 Residential Real Estate 1,704,846 1,779,625 355,167 1,235,093 16,151 16,151 Installment and Other Consumer 202,354 202,354 38,596 166,626 410 410 $ 18,354,163 $ 18,443,318 $ 3,043,319 $ 16,866,786 $ 435,034 $ 435,034 2016 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 841,895 $ 951,600 $ - $ 2,858,343 $ 16,748 $ 16,748 CRE Owner-Occupied CRE - 93,774 - 312,242 - - Commercial Construction, Land Development, and Other Land - - - - - - Other Non Owner-Occupied CRE 1,196,549 1,196,549 - 1,322,654 - - Direct Financing Leases 1,690,121 1,690,121 - 1,731,982 43,461 43,461 Residential Real Estate 853,294 892,495 - 964,590 9,903 9,903 Installment and Other Consumer 55,734 55,734 - 321,175 4,475 4,475 $ 4,637,593 $ 4,880,273 $ - $ 7,510,986 $ 74,587 $ 74,587 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 8,094,556 $ 8,098,395 $ 1,771,537 $ 2,959,495 $ 17,742 $ 17,742 CRE Owner-Occupied CRE 322,148 322,148 57,398 385,269 - - Commercial Construction, Land Development, and Other Land 4,353,817 4,353,819 577,611 1,022,930 - - Other Non Owner-Occupied CRE 239,600 239,600 58,910 47,920 - - Direct Financing Leases 1,566,143 1,566,143 848,919 841,733 36,303 36,303 Residential Real Estate 807,886 882,018 289,112 573,211 11,675 11,675 Installment and Other Consumer 50,356 50,356 39,481 40,384 527 527 $ 15,434,506 $ 15,512,479 $ 3,642,968 $ 5,870,942 $ 66,247 $ 66,247 Total Impaired Loans/Leases: C&I $ 8,936,451 $ 9,049,995 $ 1,771,537 $ 5,817,838 $ 34,490 $ 34,490 CRE Owner-Occupied CRE 322,148 415,922 57,398 697,511 - - Commercial Construction, Land Development, and Other Land 4,353,817 4,353,819 577,611 1,022,930 - - Other Non Owner-Occupied CRE 1,436,149 1,436,149 58,910 1,370,574 - - Direct Financing Leases 3,256,264 3,256,264 848,919 2,573,715 79,764 79,764 Residential Real Estate 1,661,180 1,774,513 289,112 1,537,801 21,578 21,578 Installment and Other Consumer 106,090 106,090 39,481 361,559 5,002 5,002 $ 20,072,099 $ 20,392,752 $ 3,642,968 $ 13,381,928 $ 140,834 $ 140,834 2015 Classes of Loans/Leases Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Recognized for Cash Payments Received Impaired Loans/Leases with No Specific Allowance Recorded: C&I $ 234,636 $ 346,072 $ - $ 380,495 $ 7,436 $ 7,436 CRE Owner-Occupied CRE 256,761 350,535 - 447,144 - - Commercial Construction, Land Development, and Other Land - 228,818 - 117,406 - - Other Non Owner-Occupied CRE 1,578,470 1,578,470 - 2,953,888 - - Direct Financing Leases 871,884 871,884 - 892,281 4,142 4,142 Residential Real Estate 613,486 649,064 - 1,047,001 3,929 3,929 Installment and Other Consumer 377,304 377,304 - 817,854 9,563 9,563 $ 3,932,541 $ 4,402,147 $ - $ 6,656,069 $ 25,070 $ 25,070 Impaired Loans/Leases with Specific Allowance Recorded: C&I $ 5,051,846 $ 5,055,685 $ 2,592,270 $ 4,811,046 $ - $ - CRE Owner-Occupied CRE - - - - - - Commercial Construction, Land Development, and Other Land 193,804 205,804 76,934 195,986 - - Other Non Owner-Occupied CRE - - - - - - Direct Financing Leases 829,457 829,457 306,193 474,458 - - Residential Real Estate 805,301 805,301 185,801 712,085 7,913 7,913 Installment and Other Consumer 210,438 210,438 143,089 189,539 5,693 5,693 $ 7,090,846 $ 7,106,685 $ 3,304,287 $ 6,383,114 $ 13,606 $ 13,606 Total Impaired Loans/Leases: C&I $ 5,286,482 $ 5,401,757 $ 2,592,270 $ 5,191,541 $ 7,436 $ 7,436 CRE Owner-Occupied CRE 256,761 350,535 - 447,144 - - Commercial Construction, Land Development, and Other Land 193,804 434,622 76,934 313,392 - - Other Non Owner-Occupied CRE 1,578,470 1,578,470 - 2,953,888 - - Direct Financing Leases 1,701,341 1,701,341 306,193 1,366,739 4,142 4,142 Residential Real Estate 1,418,787 1,454,365 185,801 1,759,086 11,842 11,842 Installment and Other Consumer 587,742 587,742 143,089 1,007,393 15,256 15,256 $ 11,023,387 $ 11,508,832 $ 3,304,287 $ 13,039,183 $ 38,676 $ 38,676
Financing Receivable Credit Quality Indicators [Table Text Block]	2017 CRE Non Owner-Occupied Internally Assigned Risk Rating C&I Owner-Occupied CRE Commercial Construction, Land Development, and Other Land Other CRE Total As a % of Total Pass (Ratings 1 through 5) $ 1,098,722,101 $ 318,293,608 $ 179,142,839 $ 767,119,909 $ 2,363,278,457 96.94 % Special Mention (Rating 6) 10,944,924 8,230,060 1,780,000 10,068,870 31,023,854 1.27 % Substandard (Rating 7) 24,578,731 6,218,809 5,479,565 7,158,221 43,435,326 1.78 % Doubtful (Rating 8) 270,559 - - - 270,559 0.01 % $ 1,134,516,315 $ 332,742,477 $ 186,402,404 $ 784,347,000 $ 2,438,008,197 100.00 % 2016 CRE Non Owner-Occupied Internally Assigned Risk Rating C&I Owner-Occupied CRE Commercial Construction, Land Development, and Other Land Other CRE Total As a % of Total Pass (Ratings 1 through 5) $ 796,568,451 $ 314,447,662 $ 158,108,465 $ 582,854,048 $ 1,851,978,626 96.40 % Special Mention (Rating 6) 6,305,772 7,559,380 1,780,000 4,437,122 $ 20,082,274 1.05 % Substandard (Rating 7) 24,763,040 10,380,369 5,261,026 8,630,578 $ 49,035,013 2.55 % Doubtful (Rating 8) - 210 - - $ 210 0.00 % $ 827,637,263 $ 332,387,621 $ 165,149,491 $ 595,921,748 $ 1,921,096,123 100.00 %
Financing Receivable Credit Quality Indicators Performance Status [Table Text Block]	2017 Delinquency Status * Direct Financing Leases Residential Real Estate Installment and Other Consumer Total As a % of Total Performing $ 137,778,740 $ 256,935,448 $ 118,333,529 $ 513,047,716 98.91 % Nonperforming 3,669,492 1,710,818 277,270 5,657,580 1.09 % $ 141,448,232 $ 258,646,265 $ 118,610,799 $ 518,705,296 100.00 % 2016 Delinquency Status * Direct Financing Leases Residential Real Estate Installment and Other Consumer Total As a % of Total Performing $ 161,749,710 $ 227,277,070 $ 81,449,104 $ 470,475,884 98.77 % Nonperforming 3,669,650 1,956,034 216,591 $ 5,842,275 1.23 % $ 165,419,360 $ 229,233,104 $ 81,665,695 $ 476,318,159 100.00 %
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	2017 Classes of Loans/Leases Number of Loans / Leases Pre- Modification Recorded Investment Post- Modification Recorded Investment Specific Allowance CONCESSION - Extension of Maturity Direct Financing Leases 3 $ 115,236 $ 115,236 $ - 3 $ 115,236 $ 115,236 $ - CONCESSION - Significant Payment Delay C&I 7 $ 826,531 $ 826,531 $ 62,596 CRE - Owner Occupied 1 $ 107,322 $ 107,322 - Direct Financing Leases 24 1,703,255 1,703,255 - 32 $ 2,637,108 $ 2,637,108 $ 62,596 TOTAL 35 $ 2,752,344 $ 2,752,344 $ 62,596 2016 Classes of Loans/Leases Number of Loans/Leases Pre- Modification Recorded Investment Post- Modification Recorded Investment Specific Allowance CONCESSION - Extension of Maturity C&I 3 $ 247,476 $ 247,476 $ 60,767 Direct Financing Leases 4 410,653 410,653 38,476 Residential Real Estate 1 277,092 277,092 187,492 8 $ 935,221 $ 935,221 $ 286,735 CONCESSION - Significant Payment Delay C&I 7 $ 4,562,427 $ 4,562,427 $ 813,041 Direct Financing Leases 13 1,149,493 1,149,493 125,940 20 $ 5,711,920 $ 5,711,920 $ 938,981 CONCESSION - Interest Rate Adjusted Below Market CRE - Other 1 $ 1,233,740 $ 1,233,740 $ - 1 $ 1,233,740 $ 1,233,740 $ - TOTAL 29 $ 7,880,881 $ 7,880,881 $ 1,225,716
Schedule of Related Party Transactions [Table Text Block]	2017 2016 2015 Balance, beginning $ 61,608,976 $ 42,012,313 $ 42,469,111 Net increase (decrease) due to change in related parties 11,926,759 19,945,960 (3,606,418 ) Advances 13,090,798 4,806,616 19,040,675 Repayments (20,184,585 ) (5,155,913 ) (15,891,055 ) Balance, ending $ 66,441,948 $ 61,608,976 $ 42,012,313
Schedule of Loan Concentration by Industry Segment [Table Text Block]	2017 2016 Industry Name Balance Percentage of Total Loans/Leases Balance Percentage of Total Loans/Leases Lessors of Non-Residential Buildings $ 400,622,681 14 % $ 359,040,649 15 % Lessors of Residential Buildings 370,353,561 12 % 166,036,201 7 % Administration of Urban Planning & Community & Rural Development 83,343,541 3 % 37,097,000 2 % Bank Holding Companies 66,950,294 2 % 66,069,612 3 % Nonresidential Property Managers 51,984,722 2 % 76,504,076 3 %

Note 5 - Premises and Equipme36

Note 5 - Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Property, Plant and Equipment [Table Text Block]	2017 2016 Land $ 13,466,930 $ 12,936,223 Buildings (useful lives 15 to 50 years) 53,633,788 51,546,499 Furniture and equipment (useful lives 3 to 10 years) 31,984,631 28,458,946 Premises and equipment 99,085,349 92,941,668 Less accumulated depreciation 36,247,094 32,298,160 Premises and equipment, net $ 62,838,255 $ 60,643,508
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Year ending December 31: 2018 363,791 2019 355,727 2020 259,798 2021 159,708 2022 91,969 Thereafter 62,858 $ 1,293,851

Note 6 - Goodwill and Intangi37

Note 6 - Goodwill and Intangibles (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Goodwill [Table Text Block]	2017 2016 Balance at the beginning of period $ 13,110,913 $ 3,222,688 Goodwill from acquisition of Guaranty Bank 15,223,179 - Goodwill from acquisition of CSB - 9,888,225 Balance at the end of period $ 28,334,092 $ 13,110,913
Schedule of Finite-Lived Intangible Assets [Table Text Block]	2017 2016 Balance at the beginning of the period $ 7,381,213 $ 1,471,410 Core deposit intangible from acquisition of Guaranty Bank 2,698,301 - Core deposit intangible from acquisition of CSB - 6,352,653 Amortization expense (1,000,561 ) (442,850 ) Balance at the end of the period $ 9,078,953 $ 7,381,213 Gross carrying amount $ 11,046,081 $ 8,347,780 Accumulated amortization (1,967,128 ) (966,567 ) Net book value $ 9,078,953 $ 7,381,213
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Years ending December 31, Amount 2018 $ 1,218,202 2019 1,196,331 2020 1,169,934 2021 1,139,012 2022 1,103,565 Thereafter 3,251,909 $ 9,078,953

Note 7 - Derivatives and Hedg38

Note 7 - Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	Effective Date Maturity Date Balance Sheet Location Notional Amount Accounting Treatment December 31, 2017 Fair Value December 31, 2016 Fair Value June 5, 2014 June 5, 2019 Other Assets $ 15,000,000 Cash Flow Hedging $ 190,085 $ 179,939 June 5, 2014 June 5, 2021 Other Assets 15,000,000 Cash Flow Hedging 316,615 396,588 $ 30,000,000 $ 506,700 $ 576,527
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Year Ended December 31, 2017 December 31, 2016 Unrealized loss at beginning of period, net of tax $ (932,156 ) $ (799,421 ) Amount reclassified from accumulated other comprehensive income to noninterest income related to hedge ineffectiveness - (76,797 ) Amount reclassified from accumulated other comprehensive income to noninterest expense related to hedge ineffectiveness 79,757 - Amount reclassified from accumulated other comprehensive income to interest expense related to caplet amortization 405,134 152,087 Amount of loss recognized in other comprehensive income, net of tax (357,762 ) (208,025 ) Unrealized loss at end of period, net of tax $ (805,027 ) $ (932,156 )

Note 8 - Deposits (Tables)

Note 8 - Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Maturities of Certificates of Deposit [Table Text Block]	Year ending December 31: 2018 $ 478,334,220 2019 86,231,955 2020 18,143,039 2021 8,223,919 2022 5,071,695 Thereafter 67,050 $ 596,071,878

Note 9 - Short-term Borrowings

Note 9 - Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Short-term Debt [Table Text Block]	2017 2016 Overnight repurchase agreements with customers $ 7,003,122 $ 8,131,387 Federal funds purchased 6,990,000 31,840,000 $ 13,993,122 $ 39,971,387
Schedule of Repurchase Agreements [Table Text Block]	2017 2016 Average daily balance during the period $ 7,475,824 $ 30,082,866 Average daily interest rate during the period 0.08 % 0.07 % Maximum month-end balance during the period $ 11,829,201 $ 59,833,229 Weighted average rate as of end of period 0.15 % 0.02 % 2017 2016 Average daily balance during the period $ 13,486,239 $ 19,105,595 Average daily interest rate during the period 1.31 % 0.56 % Maximum month-end balance during the period $ 33,650,000 $ 51,750,000 Weighted average rate as of end of period 1.24 % 0.70 %
Securities Sold under Agreements to Repurchase [Member]
Notes Tables
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]	2017 2016 U.S. govt. sponsored agency securities $ 2,077,702 $ 630,077 Residential mortgage-backed and related securities 18,816,280 19,090,261 Total securities pledged to overnight customer repurchase agreements 20,893,982 19,720,338 Less: overcollateralized position 13,890,860 11,588,951 $ 7,003,122 $ 8,131,387

Note 10 - FHLB Advances (Tables

Note 10 - FHLB Advances (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	December 31, 2017 December 31, 2016 Weighted Weighted Average Average Interest Rate Interest Rate Amount Due at Year-End Amount Due at Year-End Maturity: Year ending December 31: 2017 $ - - $ 112,500,000 0.78 % 2018 190,400,000 1.82 25,000,000 3.35 2020 1,600,000 1.75 - - Total FHLB advances $ 192,000,000 1.82 % $ 137,500,000 1.25 %
Schedule of Prepayments of Federal Home Loan Bank Advances [Table Text Block]	2016 Date of Restructuring Amount Weighted Average Interest Rate Range of Maturity Dates Prepayment Fees First Quarter of 2016 $ 10,000,000 3.86 % December 2017 $ 524,197 Third Quarter of 2016 5,000,000 2.84 % February 2018 127,310 Fourth Quarter of 2016 15,000,000 3.14 % September 2017 to November 2017 357,161 Total for 2016 $ 30,000,000 3.33 % $ 1,008,668

Note 11 - Other Borrowings an42

Note 11 - Other Borrowings and Unused Lines of Credit (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Debt [Table Text Block]	2017 2016 Wholesale structured repurchase agreements $ 35,000,000 $ 45,000,000 Term notes 31,000,000 30,000,000 Revolving line of credit - 5,000,000 $ 66,000,000 $ 80,000,000
Schedule of Wholesale Repurchase Agreements [Table Text Block]	2017 2016 U.S. govt. sponsored agency securities $ 3,474,555 $ 20,798,703 Residential mortgage-backed and related securities 61,528,167 31,321,028 Total securities pledged to wholesale customer repurchase agreements 65,002,722 52,119,731 Less: overcollateralized position 30,002,722 7,119,731 $ 35,000,000 $ 45,000,000
Schedule of Prepayments of Debt [Table Text Block]	2016 Date of Restructuring Amount Weighted Average Interest Rate Range of Maturity Dates Prepayment Fees First Quarter of 2016 $ 10,000,000 3.97 % July 2018 $ 759,000 Third Quarter of 2016 55,000,000 3.27 % February 2019 to September 2020 4,010,000 Total for 2016 $ 65,000,000 3.38 % $ 4,769,000
Schedule of Line of Credit Facilities [Table Text Block]	December 31, 2017 December 31, 2016 Weighted Weighted Average Average Interest Rate Interest Rate Amount Due at Year-End Amount Due at Year-End Maturity: Year ending December 31: 2017 $ - - $ 10,000,000 3.00 % 2019 10,000,000 3.44 10,000,000 3.44 2020 25,000,000 2.48 25,000,000 2.48 Total Wholesale Structured Repurchase Agreements $ 35,000,000 2.76 % $ 45,000,000 2.81 %
Schedule of Maturities of Long-term Debt [Table Text Block]	As of December 31, 2017 2018 $ 7,750,000 2019 7,750,000 2020 7,750,000 2021 7,750,000 $ 31,000,000
Whole sale Repurchase Agreements [Member]
Notes Tables
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]	2017 2016 Secured $ 2,967,441 $ 34,409,192 Unsecured 372,000,000 347,000,000 $ 374,967,441 $ 381,409,192

Note 12 - Junior Subordinated43

Note 12 - Junior Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Subordinated Borrowing [Table Text Block]	2017 2016 Note Payable to QCR Holdings Capital Trust II $ 10,310,000 $ 10,310,000 Note Payable to QCR Holdings Capital Trust III 8,248,000 8,248,000 Note Payable to QCR Holdings Capital Trust V 10,310,000 10,310,000 Note Payable to Community National Trust II 3,093,000 3,093,000 Note Payable to Community National Trust III 3,609,000 3,609,000 Note Payable to Guaranty Bankshares Statutory Trust I* 4,640,000 - Market Value Discount per ASC 805** (2,723,513 ) (2,089,798 ) $ 37,486,487 $ 33,480,202
Investments in and Advances to Affiliates [Table Text Block]	Name Date Issued Amount Outstanding December 31, 2017 Amount Outstanding December 31, 2016 Interest Rate Interest Rate as of December 31, 2017 Interest Rate as of December 31, 2016 QCR Holdings Statutory Trust II* February 2004 $ 10,310,000 $ 10,310,000 2.85% over 3-month LIBOR 4.54% 3.85% QCR Holdings Statutory Trust III February 2004 8,248,000 8,248,000 2.85% over 3-month LIBOR 4.54% 3.85% QCR Holdings Statutory Trust V February 2006 10,310,000 10,310,000 1.55% over 3-month LIBOR 2.91% 2.43% Community National Statutory Trust II September 2004 3,093,000 3,093,000 2.17% over 3-month LIBOR 3.80% 3.17% Community National Statutory Trust III March 2007 3,609,000 3,609,000 1.75% over 3-month LIBOR 3.32% 2.71% Guaranty Bankshares Statutory Trust I May 2005 4,640,000 - 1.75% over 3-month LIBOR 3.34% N/A $ 40,210,000 $ 35,570,000 Weighted Average Rate 3.82% 3.26%

Note 13 - Federal and State I44

Note 13 - Federal and State Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	2017 2016 2015 Current $ 10,976,005 $ 11,969,194 $ 5,673,774 Deferred (6,029,555 ) (3,066,407 ) (2,004,532 ) $ 4,946,450 $ 8,902,787 $ 3,669,242
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Years Ended December 31, 2017 2016 2015 % of % of % of Pretax Pretax Pretax Amount Income Amount Income Amount Income Computed "expected" tax expense $ 14,228,535 35.0 % $ 12,806,351 35.0 % $ 7,208,993 35.0 % Effect of graduated tax rates - - (250,013 ) (0.7 ) (76,973 ) (0.4 ) Tax exempt income, net (5,653,979 ) (13.9 ) (4,343,270 ) (11.9 ) (3,461,438 ) (16.8 ) Bank-owned life insurance (630,855 ) (1.5 ) (619,988 ) (1.7 ) (616,737 ) (3.0 ) State income taxes, net of federal benefit, current year 1,764,671 4.3 1,245,524 3.4 767,557 3.7 Change in unrecognized tax benefits (53,699 ) (0.1 ) 121,008 0.3 223,668 1.1 New Markets Tax Credits and other credits (341,268 ) (0.8 ) (180,000 ) (0.5 ) (180,000 ) (0.9 ) Acquisition costs - - 176,050 0.5 - - Excess tax benefit on stock options exercised and restricted stock awards vested (1,219,483 ) (3.0 ) - - - - Re-measurement of deferred tax asset to incorporate newly enacted tax rates (2,918,606 ) (7.2 ) - - - - Other (228,866 ) (0.6 ) (52,875 ) (0.1 ) (195,828 ) (0.9 ) $ 4,946,450 12.2 % $ 8,902,787 24.3 % $ 3,669,242 17.8 %
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	2017 2016 Balance, beginning $ 1,346,967 $ 1,225,959 Impact of tax positions taken during current year 333,253 319,047 Gross increase (decrease) related to tax positions of prior years (40,584 ) 17,789 Reduction as a result of a lapse of the applicable statute of limitations (346,368 ) (215,828 ) Balance, ending $ 1,293,268 $ 1,346,967
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2017 2016 Deferred tax assets: Alternative minimum tax credits $ 6,513,502 $ 6,513,502 New markets tax credits 2,164,727 1,797,587 Net unrealized losses on securities available for sale and derivative instruments 498,860 1,470,759 Compensation 6,282,603 8,737,976 Loan/lease losses 8,029,714 10,479,227 Net operating loss carryforwards, federal and state 959,627 1,879,746 Other 34,962 247,594 24,483,995 31,126,391 Deferred tax liabilities: Premises and equipment 2,400,397 4,899,107 Equipment financing leases 15,367,705 22,050,540 Acquisition fair value adjustments 1,864,599 1,336,338 Investment accretion 30,656 46,581 Deferred loan origination fees, net 115,153 261,915 Other 430,125 456,219 20,208,635 29,050,700 Net deferred tax assets $ 4,275,360 $ 2,075,691
Deferred Taxes in Financial Statements [Table Text Block]	2017 2016 2015 Provision for income taxes $ (6,029,555 ) $ (3,066,407 ) $ (2,004,532 ) Net deferred tax asset acquired - (3,310,553 ) - Net deferred tax asset resulting from market value adjustments of acquisitions 243,195 5,110,015 - Re-measurement of deferred tax asset to incorporate newly enacted tax rates 2,918,606 - - Statement of stockholders' equity- Other comprehensive income (loss) 668,085 (202,691 ) (81,524 ) $ (2,199,669 ) $ (1,469,636 ) $ (2,086,056 )

Note 14 - Employee Benefit Pl45

Note 14 - Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits [Table Text Block]	2017 2016 2015 Matching contribution $ 1,663,198 $ 1,365,111 $ 1,314,276 $ 1,663,198 $ 1,365,111 $ 1,314,276
Schedule of Changes in Projected Benefit Obligations [Table Text Block]	2017 2016 2015 Balance, beginning $ 10,455,183 $ 8,875,025 $ 7,503,692 Employee deferrals 932,921 794,168 693,656 Company match and interest 1,024,933 848,831 726,001 Cash payments made (66,102 ) (62,841 ) (48,324 ) Balance, ending $ 12,346,935 $ 10,455,183 $ 8,875,025

Note 15 - Stock-based Compens46

Note 15 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	2017 2016 2015 Stock options $ 554,435 $ 424,904 $ 393,114 Restricted stock awards 552,907 460,853 492,410 Stock purchase plan 79,694 61,417 55,945 $ 1,187,036 $ 947,174 $ 941,469
Share-based Compensation, Stock Options, Activity [Table Text Block]	December 31, 2017 2016 2015 Weighted Weighted Weighted Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding, beginning 587,961 $ 14.83 623,176 $ 13.88 661,771 $ 13.89 Granted 43,250 43.86 76,749 22.92 73,403 17.63 Exercised (114,100 ) 15.12 (111,423 ) 14.97 (79,638 ) 14.70 Forfeited (3,557 ) 26.74 (541 ) 18.36 (32,360 ) 20.69 Outstanding, ending 513,554 17.13 587,961 14.83 623,176 13.88 Exercisable, ending 354,269 385,372 405,832 Weighted average fair value per option granted $ 14.75 $ 7.31 $ 5.11
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Options Outstanding Weighted Options Exercisable Average Weighted Weighted Remaining Average Average Range of Number Contractual Exercise Number Exercise Exercise Prices Outstanding Life Price Exercisable Price $7.99 to $8.93 27,850 3.06 $ 8.09 27,850 $ 8.09 $9.00 to $9.30 148,755 2.77 9.22 147,955 9.22 $15.00 to $16.85 90,668 4.59 15.63 79,369 15.64 $17.10 to $18.00 132,816 6.57 17.31 81,521 17.26 $21.71 to $31.53 70,215 8.08 22.63 16,273 22.64 $42.65 to $48.50 43,250 9.20 43.86 1,301 42.75 513,554 354,269
Nonvested Restricted Stock Shares Activity [Table Text Block]	December 31, 2017 2016 2015 Outstanding, beginning $ 39,438 $ 45,046 $ 49,833 Granted 28,289 22,382 28,846 Released (21,338 ) (27,490 ) (33,633 ) Forfeited - (500 ) - Outstanding, ending $ 46,389 $ 39,438 $ 45,046 Weighted average fair value per share granted $ 44.44 $ 22.64 $ 17.80
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]	2017 2016 2015 Shares granted 12,414 18,711 23,408 Shares purchased 13,318 20,192 24,033 Weighted average fair value per share granted $ 6.42 $ 3.28 $ 2.39

Note 16 - Regulatory Capital 47

Note 16 - Regulatory Capital Requirements and Restrictions on Dividends (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	For Capital To Be Well Adequacy Purposes Capitalized Under For Capital With Capital Prompt Corrective Actual Adequacy Purposes Conservation Buffer* Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Company: Total risk-based capital $ 383,282 11.15 % $ 275,090 > 8.00 % $ 318,073 > 9.250 % $ 343,862 > 10.00 % Tier 1 risk-based capital 348,530 10.14 % 206,317 > 6.00 249,300 > 7.250 275,090 > 8.00 Tier 1 leverage 348,530 8.98 % 155,256 > 4.00 155,256 > 4.000 194,070 > 5.00 Common equity Tier 1 313,012 9.10 % 154,738 > 4.50 197,721 > 5.750 223,510 > 6.50 Quad City Bank & Trust: Total risk-based capital $ 160,112 12.35 % $ 103,711 > 8.00 % $ 119,916 > 9.250 % $ 129,639 > 10.00 % Tier 1 risk-based capital 147,472 11.38 % 77,783 > 6.00 93,988 > 7.250 103,711 > 8.00 Tier 1 leverage 147,472 9.52 % 61,985 > 4.00 61,985 > 4.000 77,481 > 5.00 Common equity Tier 1 147,472 11.38 % 58,337 > 4.50 74,542 > 5.750 84,265 > 6.50 Cedar Rapids Bank & Trust: Total risk-based capital $ 138,492 11.88 % $ 93,272 > 8.00 % $ 107,846 > 9.250 % $ 116,590 > 10.00 % Tier 1 risk-based capital 126,601 10.86 % 69,954 > 6.00 84,528 > 7.250 93,272 > 8.00 Tier 1 leverage 126,601 11.68 % 43,348 > 4.00 43,348 > 4.000 54,185 > 5.00 Common equity Tier 1 126,601 10.86 % 52,465 > 4.50 67,039 > 5.750 75,783 > 6.50 Community State Bank: Total risk-based capital $ 66,271 11.71 % $ 45,293 > 8.00 % $ 52,370 > 9.250 % $ 56,616 > 10.00 % Tier 1 risk-based capital 61,941 10.94 % 33,970 > 6.00 41,047 > 7.250 45,293 > 8.00 Tier 1 leverage 61,941 9.77 % 25,354 > 4.00 25,354 > 4.000 31,693 > 5.00 Common equity Tier 1 61,941 10.94 % 25,477 > 4.50 32,554 > 5.750 36,801 > 6.50 Rockford Bank & Trust: Total risk-based capital $ 45,684 11.28 % $ 32,413 > 8.00 % $ 37,477 > 9.250 % $ 40,516 > 10.00 % Tier 1 risk-based capital 40,615 10.02 % 24,310 > 6.00 29,374 > 7.250 32,413 > 8.00 Tier 1 leverage 40,615 8.94 % 18,177 > 4.00 18,177 > 4.000 22,721 > 5.00 Common equity Tier 1 40,615 10.02 % 18,232 > 4.50 23,297 > 5.750 26,335 > 6.50 For Capital Adequacy Purposes To Be Well Capitalized Under For Capital With Capital Prompt Corrective Actual Adequacy Purposes Conservation Buffer* Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016: Company: Total risk-based capital $ 327,440 11.56 % $ 226,587 > 8.00 % $ 244,289 > 8.625 % $ 283,233 > 10.00 % Tier 1 risk-based capital 296,366 10.46 % 169,940 > 6.00 187,642 > 6.625 226,587 > 8.00 Tier 1 leverage 296,366 9.10 % 130,229 > 4.00 130,229 > 4.000 162,787 > 5.00 Common equity Tier 1 266,419 9.41 % 127,455 > 4.50 145,157 > 5.125 184,102 > 6.50 Quad City Bank & Trust: Total risk-based capital $ 142,990 12.27 % $ 93,212 > 8.00 % $ 100,494 > 8.625 % $ 116,515 > 10.00 % Tier 1 risk-based capital 129,524 11.12 % 69,909 > 6.00 77,191 > 6.625 93,212 > 8.00 Tier 1 leverage 129,524 9.18 % 56,445 > 4.00 56,445 > 4.000 70,556 > 5.00 Common equity Tier 1 129,524 11.12 % 52,432 > 4.50 59,714 > 5.125 75,735 > 6.50 Cedar Rapids Bank & Trust: Total risk-based capital $ 106,791 12.82 % $ 66,623 > 8.00 % $ 71,828 > 8.625 % $ 83,279 > 10.00 % Tier 1 risk-based capital 96,369 11.57 % 49,968 > 6.00 55,173 > 6.625 66,623 > 8.00 Tier 1 leverage 96,369 10.69 % 36,061 > 4.00 36,061 > 4.000 45,076 > 5.00 Common equity Tier 1 96,369 11.57 % 37,476 > 4.50 42,681 > 5.125 54,132 > 6.50 Community State Bank: Total risk-based capital $ 68,216 13.81 % $ 39,521 > 8.00 % $ 42,609 > 8.625 % $ 49,402 > 10.00 % Tier 1 risk-based capital 66,746 13.51 % 29,641 > 6.00 32,729 > 6.625 39,522 > 8.00 Tier 1 leverage 66,746 11.75 % 22,726 > 4.00 22,726 > 4.000 28,408 > 5.00 Common equity Tier 1 66,746 13.51 % 22,231 > 4.50 25,319 > 5.125 32,111 > 6.50 Rockford Bank & Trust: Total risk-based capital $ 42,007 12.26 % $ 27,410 > 8.00 % $ 29,551 > 8.625 % $ 34,262 > 10.00 % Tier 1 risk-based capital 37,716 11.01 % 20,558 > 6.00 22,699 > 6.625 27,410 > 8.00 Tier 1 leverage 37,716 9.57 % 15,772 > 4.00 15,772 > 4.000 19,716 > 5.00 Common equity Tier 1 37,716 11.01 % 15,418 > 4.50 17,559 > 5.125 22,270 > 6.50

Note 17 - Earnings Per Share (T

Note 17 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	2017 2016 2015 Net income attributable to QCR Holdings, Inc. common stockholders $ 35,706,507 $ 27,686,787 $ 16,927,881 EPS attributable to QCR Holdings, Inc. common stockholders Basic $ 2.68 $ 2.20 $ 1.64 Diluted $ 2.61 $ 2.17 $ 1.61 Weighted average common shares outstanding* 13,325,128 12,570,767 10,345,286 Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan** 355,344 195,236 154,555 Weighted average common and common equivalent shares outstanding 13,680,472 12,766,003 10,499,841

Note 19 - Quarterly Results o49

Note 19 - Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Quarterly Financial Information [Table Text Block]	Year Ended December 31, 2017 March June September December 2017 2017 2017 2017 Total interest income $ 31,345,099 $ 32,453,268 $ 33,840,865 $ 37,878,086 Total interest expense 3,676,216 4,406,571 5,284,517 6,084,733 Net interest income 27,668,883 28,046,697 28,556,348 31,793,353 Provision for loan/lease losses 2,105,109 2,022,993 2,086,436 2,255,381 Noninterest income 7,283,754 6,782,518 6,701,303 9,714,717 Noninterest expense 21,273,117 21,404,629 23,395,747 31,351,204 Income before taxes 11,574,411 11,401,593 9,775,468 7,901,485 Federal and state income tax expense (benefit) 2,389,446 2,635,576 1,921,533 (2,000,105 ) Net income $ 9,184,965 $ 8,766,017 $ 7,853,935 $ 9,901,590 EPS: Basic $ 0.70 $ 0.67 $ 0.60 $ 0.72 Diluted $ 0.68 $ 0.65 $ 0.58 $ 0.70 Year Ended December 31, 2016 March June September December 2016 2016 2016 2016 Total interest income $ 23,502,059 $ 23,913,284 $ 26,816,735 $ 32,235,657 Total interest expense 2,904,537 2,904,471 3,185,958 2,955,992 Net interest income 20,597,522 21,008,813 23,630,777 29,279,665 Provision for loan/lease losses 2,072,985 1,197,850 1,607,986 2,599,345 Noninterest income 6,822,473 6,762,401 10,423,401 7,028,600 Noninterest expense 16,954,498 17,743,753 24,480,483 22,307,178 Income before taxes 8,392,512 8,829,611 7,965,709 11,401,742 Federal and state income tax expense 2,019,023 2,153,144 1,858,208 2,872,412 Net income $ 6,373,489 $ 6,676,467 $ 6,107,501 $ 8,529,330 EPS: Basic $ 0.54 $ 0.54 $ 0.47 $ 0.65 Diluted $ 0.53 $ 0.53 $ 0.46 $ 0.64

Note 20 - Parent Company Only50

Note 20 - Parent Company Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Condensed Balance Sheet [Table Text Block]	Condensed Balance Sheets December 31, 2017 and 2016 Assets 2017 2016 Cash and due from banks $ 4,325,582 $ 6,929,755 Interest-bearing deposits at financial institutions 601 651 Securities available for sale, at fair value 1,690,726 1,545,565 Loans/leases receivable, held for investment 1,710,000 - Investment in bank subsidiaries 410,105,525 345,866,288 Investment in nonbank subsidiaries 2,956,337 1,154,642 Premises and equipment, net 4,947,572 5,104,677 Other assets 11,630,304 15,245,521 Total assets $ 437,366,647 $ 375,847,099 Liabilities and Stockholders' Equity Liabilities: Other borrowings $ 31,000,000 $ 35,000,000 Junior subordinated debentures 37,486,487 33,480,202 Other liabilities 15,593,031 21,326,098 Total liabilities 84,079,518 89,806,300 Stockholders' Equity: Common stock 13,918,168 13,106,845 Additional paid-in capital 189,077,550 156,776,642 Retained earnings 151,962,661 118,616,901 Accumulated other comprehensive loss (1,671,250 ) (2,459,589 ) Total stockholders' equity 353,287,129 286,040,799 Total liabilities and stockholders' equity $ 437,366,647 $ 375,847,099
Condensed Income Statement [Table Text Block]	Condensed Statements of Income Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 Total interest income $ 12,802 $ 74,489 $ 69,774 Equity in net income of bank subsidiaries 45,103,593 33,467,712 22,059,086 Equity in net income of nonbank subsidiaries 75,344 32,674 32,823 Securities gains 6,312 37,596 262,800 Other 2,700 (2,933 ) (4,436 ) Total income 45,200,751 33,609,538 22,420,047 Interest expense 2,658,414 1,735,769 1,679,909 Salaries and employee benefits 5,021,998 4,607,887 4,847,507 Professional fees 1,344,721 949,442 1,121,094 Acquisition costs 1,068,918 1,400,004 - Post-acquisition compensation, transition and integration costs 3,151,384 313,598 - Gains on debt extinguishment - (1,200,000 ) (300,000 ) Other 1,134,139 988,057 949,041 Total expenses 14,379,574 8,794,757 8,297,551 Income before income tax benefit 30,821,177 24,814,781 14,122,496 Income tax benefit 4,885,330 2,872,006 2,805,385 Net income $ 35,706,507 $ 27,686,787 $ 16,927,881
Condensed Cash Flow Statement [Table Text Block]	Condensed Statements of Cash Flows Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 Cash Flows from Operating Activities: Net income $ 35,706,507 $ 27,686,787 $ 16,927,881 Adjustments to reconcile net income to net cash provided by operating activities: Earnings of bank subsidiaries (45,103,593 ) (33,467,712 ) (22,059,086 ) Earnings of nonbank subsidiaries (75,344 ) (32,674 ) (32,823 ) Distributions from bank subsidiaries 21,000,000 26,000,000 9,700,000 Distributions from nonbank subsidiaries 38,734 32,860 32,695 Accretion of acquisition fair value adjustments 149,010 136,150 137,317 Depreciation 225,947 222,256 174,757 Stock-based compensation expense 1,187,036 947,174 941,469 Securities gains, net (6,312 ) (37,596 ) (262,801 ) Gains on debt extinguishment - (1,200,000 ) (300,000 ) Decrease (increase) in other assets (968,808 ) (2,346,253 ) (5,929,110 ) (Decrease) increase in other liabilities (6,918,921 ) 5,105,251 5,502,390 Net cash provided by operating activities 5,234,256 23,046,243 4,832,689 Cash Flows from Investing Activities: Net increase in interest-bearing deposits at financial institutions 50 50 189,426 Activity in securities portfolio: Purchases - (3,873,060 ) (1,764,137 ) Calls, maturities and redemptions 6,312 3,800,000 1,772,719 Sales 31,713 132,738 489,828 Capital infusion, bank subsidiaries - - (45,600,000 ) Net cash paid for acquisitions (3,368,909 ) (80,000,000 ) - Purchase of premises and equipment (68,842 ) (824,498 ) (1,517,157 ) Net cash (used in) provided by investing activities (3,399,676 ) (80,764,770 ) (46,429,321 ) Cash Flows from Financing Activities: Activity in other borrowings: Proceeds from other borrowings 7,000,000 35,000,000 - Calls, maturities and scheduled principal payments (11,000,000 ) - (2,350,000 ) Prepayments - - (19,395,116 ) Retirement of junior subordinated debentures - (3,955,000 ) (1,762,000 ) Payment of cash dividends on common and preferred stock (2,494,260 ) (1,981,541 ) (782,054 ) Net proceeds from common stock offering, 3,680,000 shares issued - - 63,484,123 Net proceeds from common stock offering, 1,215,000 shares issued - 29,828,916 - Proceeds from issuance of common stock, net 2,055,507 2,105,774 1,552,673 Net cash provided by (used in) financing activities (4,438,753 ) 60,998,149 40,747,626 Net increase (decrease) in cash and due from banks (2,604,173 ) 3,279,622 (849,006 ) Cash and due from banks: Beginning 6,929,755 3,650,133 4,499,139 Ending $ 4,325,582 $ 6,929,755 $ 3,650,133

Note 21 - Fair Value (Tables)

Note 21 - Fair Value (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	Fair Value Measurements at Reporting Date Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Identical Assets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) December 31, 2017: Securities available for sale: U.S. govt. sponsored agency securities $ 38,096,534 $ - $ 38,096,534 $ - Residential mortgage-backed securities 163,301,304 - 163,301,304 - Municipal securities 66,625,496 - 66,625,496 - Other securities 4,884,573 1,028 4,883,545 - Interest rate caps 506,700 - 506,700 - Interest rate swaps - assets 4,397,238 - 4,397,238 Total assets measured at fair value $ 277,811,845 $ 1,028 $ 277,810,817 $ - Interest rate swaps - liabilities $ 4,397,238 $ - $ 4,397,238 $ - Total liabilities measured at fair value $ 4,397,238 $ - $ 4,397,238 $ - December 31, 2016: Securities available for sale: U.S. govt. sponsored agency securities $ 46,083,607 $ - $ 46,083,607 $ - Residential mortgage-backed securities 147,702,127 - 147,702,127 - Municipal securities 52,604,426 - 52,604,426 - Other securities 4,722,979 1,361 4,721,618 - Interest rate caps 576,527 - 576,527 - Interest rate swaps - assets 2,338,281 - 2,338,281 Total assets measured at fair value $ 254,027,947 $ 1,361 $ 254,026,586 $ - Interest rate swaps - liabilities $ 2,338,281 $ - $ 2,338,281 $ - Total liabilities measured at fair value $ 2,338,281 $ - $ 2,338,281 $ - Fair Value Measurements at Reporting Date Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Identical Assets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) December 31, 2017: Impaired loans/leases $ 8,972,337 $ - $ - $ 8,972,337 Other real estate owned 14,642,973 - - 14,642,973 $ 23,615,310 $ - $ - $ 23,615,310 December 31, 2016: Impaired loans/leases $ 12,823,121 $ - $ - $ 12,823,121 Other real estate owned 5,964,952 - - 5,964,952 $ 18,788,073 $ - $ - $ 18,788,073
Fair Value Inputs, Assets, Quantitative Information [Table Text Block]	Quantitative Information about Level Fair Value Measurements December 31, 2017 Fair Value December 31, 2016 Fair Value Valuation Technique Unobservable Input Range Impaired loans/leases $ 8,972,337 $ 12,823,121 Appraisal of collateral Appraisal adjustments -10.00% to -50.00% Other real estate owned 14,642,973 5,964,952 Appraisal of collateral Appraisal adjustments 0.00% to -35.00%
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value As of December 31, 2017 As of December 31, 2016 Hierarchy Carrying Estimated Carrying Estimated Level Value Fair Value Value Fair Value Cash and due from banks Level 1 $ 75,721,663 $ 75,721,663 $ 70,569,993 $ 70,569,993 Federal funds sold Level 2 30,197,000 30,197,000 22,257,000 22,257,000 Interest-bearing deposits at financial institutions Level 2 55,765,012 55,765,012 63,948,925 63,948,925 Investment securities: HTM Level 2 379,474,205 379,749,804 322,909,056 320,414,899 AFS See Previous Table 272,907,907 272,907,907 251,113,139 251,113,139 Loans/leases receivable, net Level 3 8,307,719 8,972,337 11,873,260 12,823,121 Loans/leases receivable, net Level 2 2,921,821,953 2,892,963,000 2,362,856,277 2,344,462,740 Interest rate caps Level 2 506,700 506,700 576,527 576,527 Interest rate swaps - assets Level 2 4,397,238 4,397,238 2,338,281 2,338,281 Deposits: Nonmaturity deposits Level 2 2,670,583,178 2,670,583,178 2,188,683,349 2,188,683,349 Time deposits Level 2 596,071,878 591,772,000 480,577,924 479,605,000 Short-term borrowings Level 2 13,993,122 13,993,122 39,971,387 39,971,387 FHLB advances Level 2 192,000,000 192,115,000 137,500,000 138,338,000 Other borrowings Level 2 66,000,000 66,520,000 80,000,000 81,282,000 Junior subordinated debentures Level 2 37,486,487 29,253,624 33,480,202 24,881,494 Interest rate swaps - liabilities Level 2 4,397,238 4,397,238 2,338,281 2,338,281

Note 22 - Business Segment In52

Note 22 - Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Commercial Banking QCBT CRBT Guaranty Bank* CSB RB&T Wealth Management All other Intercompany Eliminations Consolidated Total Twelve Months Ended December 31, 2017 Total revenue $ 58,055,715 $ 45,367,035 $ 1,806,078 $ 31,944,152 $ 18,035,971 $ 11,057,519 $ 232,660 $ (499,520 ) $ 165,999,610 Net interest income 46,407,078 31,042,302 1,551,356 27,020,674 12,707,651 - (2,663,780 ) - 116,065,281 Provision for loan/lease losses 3,908,919 1,050,000 - 2,783,000 728,000 - - - 8,469,919 Net income 22,095,055 10,712,174 346,835 7,047,671 2,660,364 2,241,494 (9,397,086 ) - 35,706,507 Goodwill 3,222,688 15,223,179 - 9,888,225 - - - - 28,334,092 Core deposit intangible - 3,693,592 - 5,385,361 - - - - 9,078,953 Total assets 1,541,777,558 1,307,376,687 - 670,516,373 461,650,765 - 28,267,478 (26,924,088 ) 3,982,664,773 Twelve Months Ended December 31, 2016 Total revenue $ 59,442,052 $ 37,242,901 $ - $ 11,406,291 $ 16,043,894 $ 9,156,948 $ 109,563 $ 4,100,975 $ 137,502,624 Net interest income 45,081,080 29,205,047 - 10,004,729 11,887,201 - (1,661,280 ) - 94,516,777 Provision for loan/lease losses 4,168,166 950,000 - 1,460,000 900,000 - - - 7,478,166 Net income 14,116,751 12,317,545 - 2,132,252 3,235,711 1,665,453 (5,780,925 ) - 27,686,787 Goodwill 3,222,688 - - 9,888,225 - - - - 13,110,913 Core deposit intangible - 1,271,897 - 6,109,316 - - - - 7,381,213 Total assets 1,395,785,241 913,055,738 - 600,075,798 391,154,780 - 34,998,902 (33,126,711 ) 3,301,943,748 Twelve Months Ended December 31, 2015 Total revenue $ 52,914,705 $ 37,593,652 $ - $ - $ 14,816,300 $ 9,103,173 $ 363,432 $ (424,688 ) $ 114,366,574 Net interest income 40,416,563 26,635,659 - - 10,854,637 - (1,610,135 ) - 76,296,724 Provision for loan/lease losses 4,367,234 1,750,000 - - 753,666 - - - 6,870,900 Net income 10,333,111 7,695,867 - - 2,402,522 1,627,586 (5,131,205 ) - 16,927,881 Goodwill 3,222,688 - - - - - - - 3,222,688 Core deposit intangible - 1,471,409 - - - - - - 1,471,409 Total assets 1,336,571,694 866,872,406 - - 367,471,639 - 27,605,704 (5,323,168 ) 2,593,198,275

Note 1 - Nature of Business a53

Note 1 - Nature of Business and Significant Accounting Policies (Details Textual)	3 Months Ended								12 Months Ended
	Dec. 31, 2017USD ($)shares	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)shares	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	Oct. 01, 2017USD ($)	Aug. 31, 2005USD ($)
Number of Subsidiaries	4								4
Number of Non-Consolidated Subsidiaries Issuing Trust Preferred Securities									6
Cash Reserve Deposit Required and Made	$ 41,803,000				$ 42,233,000				$ 41,803,000	$ 42,233,000
Initial Direct Leasing Costs As a Percentage of Cost	5.50%								5.50%
Financing Receivable, Lines of Credit Maximum Term									1 year
Commercial Real Estate Owner Occupied, Percentage	26.00%				30.00%				26.00%	30.00%
Lending Threshold Requiring Additional Loan Review	$ 1,000,000								$ 1,000,000
Goodwill	$ 28,334,092				$ 13,110,913				28,334,092	$ 13,110,913	$ 3,222,688
Goodwill, Impaired, Accumulated Impairment Loss		$ 0
Swap Fee Income									$ 3,094,939	$ 1,708,204	$ 1,717,552
Preferred Stock, Shares Authorized | shares	250,000				250,000				250,000	250,000	250,000
Preferred Stock, Shares Outstanding | shares	0				0				0	0
Allocated Share-based Compensation Expense									$ 1,187,035	$ 947,174	$ 941,469
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	354,269				385,372				354,269	385,372	405,832
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 13,200,000								$ 13,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	10,500,000								10,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value									1,055,193	$ 1,525,902	$ 480,354
Income Tax Expense (Benefit)	(2,000,105)	$ 1,921,533	$ 2,635,576	$ 2,389,446	$ 2,872,412	$ 1,858,208	$ 2,153,144	$ 2,019,023	4,946,450	8,902,787	3,669,242
Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income									304,000
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit)									(1,200,000)
Employee Stock Option [Member]
Allocated Share-based Compensation Expense									554,435	424,904	393,114
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 961,972								$ 961,972
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition									1 year 335 days
In The Money Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	495,004								495,004
Restricted Stock [Member]
Allocated Share-based Compensation Expense									$ 552,907	460,853	$ 492,410
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 1,210,425								$ 1,210,425
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition									2 years 219 days
m2 Lease Funds, LLC [Member]
Goodwill													$ 3,222,688
Business Acquisition, Percentage of Voting Interests Acquired													80.00%
Community State Bank Acquisition [Member]
Goodwill					$ 9,888,225					$ 9,888,225
Guaranty Bank and Trust Company [Member]
Goodwill	$ 15,223,179								$ 15,223,179			$ 15,223,179
Business Acquisition, Percentage of Voting Interests Acquired												100.00%
Subsidiaries [Member] | Fixed Rate Residential Mortgage [Member]
Financing Receivable, Term										15 years
Commercial Portfolio Segment [Member]
Financing Receivable, Term Loans, Generally Maximum Term									7 years
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loan and Leases Receivable, Lending Limits Percent	300.00%								300.00%
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loan and Leases Receivable, Lending Limits Percent	100.00%								100.00%
Minimum [Member]
Residual Value Percent of Cost	3.00%								3.00%
Minimum [Member] | Subsidiaries [Member] | Adjustable Rate Residential Mortgage [Member]
Financing Receivable, Term									1 year
Minimum [Member] | Commercial Portfolio Segment [Member] | Term Loan [Member]
Financing Receivable, Term									3 years
Maximum [Member]
Residual Value Percent of Cost	25.00%								25.00%
Maximum [Member] | Subsidiaries [Member] | Adjustable Rate Residential Mortgage [Member]
Financing Receivable, Term									5 years
Maximum [Member] | Special Mention [Member]
Financing Receivable, Credit Weaknesses Borrowers, Term									1 year
Maximum [Member] | Commercial Portfolio Segment [Member] | Term Loan [Member]
Financing Receivable, Term									5 years

Note 1 - Nature of Business a54

Note 1 - Nature of Business and Significant Accounting Policies - Option Pricing Model Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Expected life of option grants (Year)	10 years
Weighted-average grant date fair value (in dollars per share)	$ 14.75	$ 7.31	$ 5.11
Employee Stock Option [Member]
Expected life of option grants (Year)	6 years	6 years	6 years
Weighted-average grant date fair value (in dollars per share)	$ 14.75	$ 7.31	$ 5.11
Employee Stock Option [Member] | Minimum [Member]
Dividend yield	0.36%	0.35%	0.37%
Expected volatility	29.64%	29.32%	28.92%
Risk-free interest rate	2.50%	1.73%	1.89%
Employee Stock Option [Member] | Maximum [Member]
Dividend yield	0.47%	0.51%	0.46%
Expected volatility	29.95%	29.37%	29.32%
Risk-free interest rate	2.81%	2.18%	2.37%
Stock Purchase Grants [Member]
Weighted-average grant date fair value (in dollars per share)	$ 6.42	$ 3.28	$ 2.39
Stock Purchase Grants [Member] | Minimum [Member]
Dividend yield	0.37%	0.33%	0.37%
Expected volatility	19.80%	12.70%	8.81%
Risk-free interest rate	0.67%	0.39%	0.09%
Expected life of option grants (Year)	90 days	90 days	90 days
Stock Purchase Grants [Member] | Maximum [Member]
Dividend yield	0.42%	0.59%	0.45%
Expected volatility	19.86%	15.60%	13.10%
Risk-free interest rate	1.18%	0.57%	0.016%
Expected life of option grants (Year)	180 days	180 days	180 days

Note 2 - Acquisitions (Details

Note 2 - Acquisitions (Details Textual)		Oct. 01, 2017USD ($)shares	Sep. 27, 2017USD ($)	Aug. 31, 2016USD ($)	Jun. 30, 2016USD ($)$ / sharesshares	Dec. 31, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 29, 2017$ / shares
Number of Branches				10
Payments to Acquire Businesses, Gross	[1]						$ 7,803,420	$ 80,000,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable							30,879,485
Business Combination, Consideration Transferred							38,682,905	80,000,000
Debt Instrument, Face Amount						$ 35,570,000	40,210,000	35,570,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						20,684,880	4,808,343	20,684,880
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						6,352,653	2,698,301	6,352,653
Business Combination, Acquisition Related Costs							1,068,918	1,400,004
Business Combination, Integration Related Costs							4,309,565	1,041,169
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 581,000,000		581,676,478	259,590,468	581,676,478
Stock Issued During Period, Shares, New Issues | shares					1,215,000
Shares Issued, Price Per Share | $ / shares					$ 24.75
Proceeds from Issuance of Common Stock					$ 29,800,000
Notes Payable						30,000,000		30,000,000
Revolving Credit Facility [Member]
Proceeds from Lines of Credit								5,000,000
Line of Credit Facility, Maximum Borrowing Capacity						10,000,000	10,000,000	10,000,000
Guaranty Bank and Trust Company [Member]
Number of Branches		5
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Acquisition, Equity Interest Issued or Issuable, Percentage of Aggregate Consideration		79.00%
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares		678,670
Payments to Acquire Businesses, Gross, Percentage of Aggregate Consideration		21.00%
Payments to Acquire Businesses, Gross		$ 7,803,420
Share Price | $ / shares										$ 45.50
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		30,879,485
Business Combination, Consideration Transferred		$ 38,682,905
Debt Instrument, Face Amount			$ 7,000,000
Debt Instrument, Term			4 years
Business Acquisition, Goodwill, Expected Tax Deductible Amount, Term		15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		$ 4,808,343
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		2,698,301
Business Combination, Acquisition Related Costs							1,100,000
Business Combination, Integration Related Costs							3,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		259,590,468
Guaranty Bank and Trust Company [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 2,698,301
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Guaranty Bank and Trust Company [Member] | Five Branch Locations [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		$ 4,614,604
Impairment of Long-Lived Assets Held-for-use		$ 998,343
Property, Plant and Equipment, Useful Life		39 years
Guaranty Bank and Trust Company [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Nonaccretable Discount, Accelerated							158,000
Guaranty Bank and Trust Company [Member] | Other Assets [Member]
Assets Held-for-sale, Not Part of Disposal Group							3,600,000
Community State Bank [Member]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Payments to Acquire Businesses, Gross				$ 80,000,000
Business Combination, Consideration Transferred				80,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				20,684,880
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				6,352,653
Business Combination, Acquisition Related Costs						473,000		1,400,000
Business Combination, Integration Related Costs							1,200,000	1,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				581,676,478
Dividends, Cash								15,200,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual						11,400,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual						$ 2,100,000
Community State Bank [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 6,352,653
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years
Community State Bank [Member] | Ten Branch Locations [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				$ 19,735,000
Property, Plant and Equipment, Useful Life				39 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Write-up				$ 8,334,437
Community State Bank [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Nonaccretable Discount, Accelerated							$ 198,000	$ 186,000
[1]	Net cash paid at closing totaled $69,905,355 for acquisition of CSB in 2016.

Note 2 - Acquisitions - Conside

Note 2 - Acquisitions - Consideration Paid and Goodwill (Details) - USD ($)		Oct. 01, 2017	Aug. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	[1]			$ 4,434,511	$ 10,094,645
Interest-bearing deposits at financial institutions				3,953,907	14,730,157
Securities				49,703,419	102,640,029
Loans/leases receivable, net				192,517,677	419,029,277
Premises and equipment				4,808,343	20,684,880
Restricted investment securities				476,500	1,512,900
Core deposit intangible				2,698,301	6,352,653
Other assets				997,810	5,283,937
Total assets acquired			$ 581,000,000	259,590,468	581,676,478
Federal funds sold					698,000
Other real estate owned					650,000
LIABILITIES
Deposits				212,467,514	486,298,262
Short-term borrowings				13,102,043
FHLB advances				4,108,027	20,368,877
Junior subordinated debentures				3,857,275
Other liabilities				2,595,883	4,897,564
Total liabilities assumed				236,130,742	511,564,703
Net assets acquired				23,459,726	70,111,775
Consideration paid:
Cash	[2]			7,803,420	80,000,000
Common stock				30,879,485
Total consideration paid				38,682,905	80,000,000
Goodwill				28,334,092	$ 13,110,913	$ 3,222,688
Guaranty Bank and Trust Company [Member]
ASSETS
Cash and due from banks		$ 4,434,511
Interest-bearing deposits at financial institutions		3,953,907
Securities		49,703,419
Loans/leases receivable, net		192,517,677
Premises and equipment		4,808,343
Restricted investment securities		476,500
Core deposit intangible		2,698,301
Other assets		997,810
Total assets acquired		259,590,468
LIABILITIES
Deposits		212,467,514
Short-term borrowings		13,102,043
FHLB advances		4,108,027
Junior subordinated debentures		3,857,275
Other liabilities		2,595,883
Total liabilities assumed		236,130,742
Net assets acquired		23,459,726
Consideration paid:
Cash		7,803,420
Common stock		30,879,485
Total consideration paid		38,682,905
Goodwill		$ 15,223,179		$ 15,223,179
Community State Bank [Member]
ASSETS
Cash and due from banks			10,094,645
Interest-bearing deposits at financial institutions			14,730,157
Securities			102,640,029
Loans/leases receivable, net			419,029,277
Premises and equipment			20,684,880
Restricted investment securities			1,512,900
Core deposit intangible			6,352,653
Other assets			5,283,937
Total assets acquired			581,676,478
Federal funds sold			698,000
Other real estate owned			650,000
LIABILITIES
Deposits			486,298,262
FHLB advances			20,368,877
Other liabilities			4,897,564
Total liabilities assumed			511,564,703
Net assets acquired			70,111,775
Consideration paid:
Cash			80,000,000
Total consideration paid			80,000,000
Goodwill			$ 9,888,225
[1]	Net cash paid at closing totaled $69,905,355
[2]	Net cash paid at closing totaled $69,905,355 for acquisition of CSB in 2016.

Note 2 - Acquisitions - Purchas

Note 2 - Acquisitions - Purchased Loans As of the Acquisition Date (Details) - USD ($)	Oct. 01, 2017	Aug. 31, 2016
Guaranty Bank and Trust Company [Member]
Contractually required principal payments	$ 196,108,766
Nonaccretable discount	(1,147,198)
Principal cash flows expected to be collected	194,961,568
Accretable discount	(2,443,891)
Fair Value of acquired loans	192,517,677
Guaranty Bank and Trust Company [Member] | Performing Financial Instruments [Member]
Contractually required principal payments	192,982,439
Nonaccretable discount
Principal cash flows expected to be collected	192,982,439
Accretable discount	(2,223,989)
Fair Value of acquired loans	190,758,450
Community State Bank [Member]
Contractually required principal payments		$ 435,748,088
Nonaccretable discount		(4,525,223)
Principal cash flows expected to be collected		431,222,865
Accretable discount		(12,193,588)
Fair Value of acquired loans		419,029,277
Community State Bank [Member] | Performing Financial Instruments [Member]
Contractually required principal payments		427,398,400
Nonaccretable discount
Principal cash flows expected to be collected		427,398,400
Accretable discount		(11,916,009)
Fair Value of acquired loans		415,482,391
Receivables Acquired with Deteriorated Credit Quality [Member] | Guaranty Bank and Trust Company [Member]
Contractually required principal payments	3,126,327
Nonaccretable discount	(1,147,198)
Principal cash flows expected to be collected	1,979,129
Accretable discount	(219,902)
Fair Value of acquired loans	$ 1,759,227
Receivables Acquired with Deteriorated Credit Quality [Member] | Community State Bank [Member]
Contractually required principal payments		8,349,688
Nonaccretable discount		(4,525,223)
Principal cash flows expected to be collected		3,824,465
Accretable discount		(277,579)
Fair Value of acquired loans		$ 3,546,886

Note 2 - Acquisitions - Changes

Note 2 - Acquisitions - Changes in Accretable Yield (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance at the beginning of the period	$ (9,309,920)
Discount added at acquisition	(2,443,891)	(12,193,588)
Accretion recognized	5,282,604	2,883,668
Balance at the end of the period	(6,471,207)	(9,309,920)
Performing Financial Instruments [Member]
Balance at the beginning of the period	(9,115,614)
Discount added at acquisition	(2,223,989)	(11,916,009)
Accretion recognized	5,059,528	2,800,395
Balance at the end of the period	(6,280,075)	(9,115,614)
Guaranty Bank and Trust Company [Member]
Balance at the beginning of the period
Discount added at acquisition	(2,443,891)
Accretion recognized	80,906
Balance at the end of the period	(2,362,985)
Guaranty Bank and Trust Company [Member] | Performing Financial Instruments [Member]
Balance at the beginning of the period
Discount added at acquisition	(2,223,989)
Accretion recognized	26,836
Balance at the end of the period	(2,197,153)
Community State Bank [Member]
Balance at the beginning of the period	(9,309,920)
Discount added at acquisition		(12,193,588)
Accretion recognized	5,201,698	2,883,668
Balance at the end of the period	(4,108,222)	(9,309,920)
Community State Bank [Member] | Performing Financial Instruments [Member]
Balance at the beginning of the period	(9,115,614)
Discount added at acquisition		(11,916,009)
Accretion recognized	5,032,692	2,800,395
Balance at the end of the period	(4,082,922)	(9,115,614)
Receivables Acquired with Deteriorated Credit Quality [Member]
Balance at the beginning of the period	(194,306)
Discount added at acquisition	(219,902)	(277,579)
Accretion recognized	223,076	83,273
Balance at the end of the period	(191,132)	(194,306)
Receivables Acquired with Deteriorated Credit Quality [Member] | Guaranty Bank and Trust Company [Member]
Balance at the beginning of the period
Discount added at acquisition	(219,902)
Accretion recognized	54,070
Balance at the end of the period	(165,832)
Receivables Acquired with Deteriorated Credit Quality [Member] | Community State Bank [Member]
Balance at the beginning of the period	(194,306)
Discount added at acquisition		(277,579)
Accretion recognized	169,006	83,273
Balance at the end of the period	$ (25,300)	$ (194,306)

Note 2 - Acquisitions - Pro For

Note 2 - Acquisitions - Pro Forma Combined Operating Results (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Guaranty Bank and Trust Company [Member]
Net interest income	$ 122,923	$ 102,902
Noninterest income	32,703	34,238
Net income	$ 38,728	$ 27,103
Basic (in dollars per share)	$ 2.80	$ 2.05
Diluted (in dollars per share)	$ 2.73	$ 2.02
Community State Bank [Member]
Net interest income		$ 110,035	$ 98,483
Noninterest income		34,773	31,051
Net income		$ 34,137	$ 22,118
Basic (in dollars per share)		$ 2.62	$ 1.91
Diluted (in dollars per share)		$ 2.58	$ 1.89

Note 3 - Investment Securitie60

Note 3 - Investment Securities (Details Textual)	1 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Number of Securities		613
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		223
Aggregate Depreciation from Amortized Cost Basis, Percent		0.80%
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year		110
Other than Temporary Impairment Losses, Investments		$ 0	$ 0	$ 0
Gain on Sale of Investments	$ 4,010,877	67,351	4,845,009	$ 1,045,444
Security Owned and Pledged as Collateral, Fair Value		$ 78,642,843	$ 118,811,905
General Obligation Bonds [Member] | Stockholders' Equity, Total [Member] | Credit Concentration Risk [Member]
Concentration Risk, Percentage		0.00%	0.00%
Revenue Bonds [Member] | Stockholders' Equity, Total [Member] | Credit Concentration Risk [Member]
Concentration Risk, Percentage		0.00%	0.00%
Municipal Bonds [Member] | General Obligation Bonds [Member]
Number of Issuers		131	116
Other Investments		$ 108,000,000	$ 116,500,000
Number of States Investments Held in		26	21
Municipal Bonds [Member] | General Obligation Bonds [Member] | Minimum [Member]
Other Investments		$ 5,000,000	$ 5,000,000
Municipal Bonds [Member] | General Obligation Bonds [Member] | Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in		6	5
Municipal Bonds [Member] | Revenue Bonds [Member]
Number of Issuers		145	120
Other Investments		$ 337,300,000	$ 255,500,000
Number of States Investments Held in		16	12
Municipal Bonds [Member] | Revenue Bonds [Member] | Minimum [Member]
Other Investments		$ 5,000,000	$ 5,000,000
Municipal Bonds [Member] | Revenue Bonds [Member] | Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in		7	6
Equity Securities [Member]
Percentage of Investment Portfolio		1.00%	1.00%

Note 3 - Investment Securitie61

Note 3 - Investment Securities - Amortized Cost and Fair Value of Investment Securities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities held to maturity:
Securities held to maturity, at amortized cost	$ 379,474,205	$ 322,909,056
Securities held to maturity, gross unrealized gains	2,763,718	2,200,577
Securities held to maturity, gross unrealized (losses)	(2,488,119)	(4,694,734)
Securities held to maturity, fair value	379,749,804	320,414,899
Securities available for sale:
Securities available for sale, amortized cost	274,058,995	253,609,401
Securities available for sale, gross unrealized gains	1,749,323	1,437,658
Securities available for sale, gross unrealized (losses)	(2,900,411)	(3,933,920)
Securities available for sale, fair value	272,907,907	251,113,139
US States and Political Subdivisions Debt Securities [Member]
Securities held to maturity:
Securities held to maturity, at amortized cost	378,424,205	321,859,056
Securities held to maturity, gross unrealized gains	2,763,718	2,200,577
Securities held to maturity, gross unrealized (losses)	(2,488,119)	(4,694,734)
Securities held to maturity, fair value	378,699,804	319,364,899
Securities available for sale:
Securities available for sale, amortized cost	66,176,364	52,816,541
Securities available for sale, gross unrealized gains	660,232	425,801
Securities available for sale, gross unrealized (losses)	(211,100)	(637,916)
Securities available for sale, fair value	66,625,496	52,604,426
Other Securities [Member]
Securities held to maturity:
Securities held to maturity, at amortized cost	1,050,000	1,050,000
Securities held to maturity, gross unrealized gains
Securities held to maturity, gross unrealized (losses)
Securities held to maturity, fair value	1,050,000	1,050,000
Securities available for sale:
Securities available for sale, amortized cost	4,014,004	4,046,332
Securities available for sale, gross unrealized gains	896,384	703,978
Securities available for sale, gross unrealized (losses)	(25,815)	(27,331)
Securities available for sale, fair value	4,884,573	4,722,979
US Government Agencies Debt Securities [Member]
Securities available for sale:
Securities available for sale, amortized cost	38,409,157	46,281,306
Securities available for sale, gross unrealized gains	37,344	132,886
Securities available for sale, gross unrealized (losses)	(349,967)	(330,585)
Securities available for sale, fair value	38,096,534	46,083,607
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Securities available for sale, amortized cost	165,459,470	150,465,222
Securities available for sale, gross unrealized gains	155,363	174,993
Securities available for sale, gross unrealized (losses)	(2,313,529)	(2,938,088)
Securities available for sale, fair value	$ 163,301,304	$ 147,702,127

Note 3 - Investment Securitie62

Note 3 - Investment Securities - Securities in a Continuous Unrealized Loss Position (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities available for sale:
Securities available for sale, less than 12 months, fair value	$ 128,656,909	$ 180,624,957
Securities available for sale, less than 12 months, gross unrealized losses	(1,138,843)	(3,545,097)
Securities available for sale, 12 months or more, fair value	71,569,641	13,274,726
Securities available for sale, 12 months or more, gross unrealized losses	(1,761,568)	(388,823)
Securities available for sale, fair value	200,226,550	193,899,683
Securities available for sale, gross unrealized losses	(2,900,411)	(3,933,920)
US States and Political Subdivisions Debt Securities [Member]
Securities held to maturity:
Securities held to maturity, less than 12 months, fair value	23,750,826	122,271,533
Securities held to maturity, less than 12 months, gross unrealized losses	(354,460)	(4,076,647)
Securities held to maturity, 12 months or more, fair value	72,611,780	13,010,803
Securities held to maturity, 12 months or more, gross unrealized losses	(2,133,659)	(618,087)
Securities held to maturity, fair value	96,362,606	135,282,336
Securities held to maturity, gross unrealized losses	(2,488,119)	(4,694,734)
Securities available for sale:
Securities available for sale, less than 12 months, fair value	10,229,337	34,152,822
Securities available for sale, less than 12 months, gross unrealized losses	(41,151)	(618,462)
Securities available for sale, 12 months or more, fair value	9,997,433	338,099
Securities available for sale, 12 months or more, gross unrealized losses	(169,949)	(19,454)
Securities available for sale, fair value	20,226,770	34,490,921
Securities available for sale, gross unrealized losses	(211,100)	(637,916)
US Government Agencies Debt Securities [Member]
Securities available for sale:
Securities available for sale, less than 12 months, fair value	28,576,258	21,788,139
Securities available for sale, less than 12 months, gross unrealized losses	(200,022)	(257,640)
Securities available for sale, 12 months or more, fair value	3,640,477	5,499,012
Securities available for sale, 12 months or more, gross unrealized losses	(149,945)	(72,945)
Securities available for sale, fair value	32,216,735	27,287,151
Securities available for sale, gross unrealized losses	(349,967)	(330,585)
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Securities available for sale, less than 12 months, fair value	88,927,779	121,506,582
Securities available for sale, less than 12 months, gross unrealized losses	(871,855)	(2,641,664)
Securities available for sale, 12 months or more, fair value	57,931,731	7,437,615
Securities available for sale, 12 months or more, gross unrealized losses	(1,441,674)	(296,424)
Securities available for sale, fair value	146,859,510	128,944,197
Securities available for sale, gross unrealized losses	(2,313,529)	(2,938,088)
Other Securities [Member]
Securities available for sale:
Securities available for sale, less than 12 months, fair value	923,535	3,177,414
Securities available for sale, less than 12 months, gross unrealized losses	(25,815)	(27,331)
Securities available for sale, 12 months or more, fair value
Securities available for sale, fair value	923,535	3,177,414
Securities available for sale, gross unrealized losses	$ (25,815)	$ (27,331)

Note 3 - Investment Securitie63

Note 3 - Investment Securities - Sales of Securities (Details) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Proceeds from sales of securities		$ 71,091,580	$ 134,188,737	$ 81,410,368
Gain on Sale of Investments	$ 4,010,877	67,351	4,845,009	1,045,444
Gross losses from sales of securities		$ (155,236)	$ (252,611)	$ (246,461)

Note 3 - Investment Securitie64

Note 3 - Investment Securities - Securities by Contractual Maturity (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities held to maturity:
Securities held to maturity, due in one year or less, amortized cost	$ 2,912,158
Securities held to maturity, due in one year or less, fair value	2,909,816
Securities held to maturity, due after one year through five years, amortized cost	20,838,734
Securities held to maturity, due after one year through five years, fair value	20,896,388
Securities held to maturity, due after five years, amortized cost	355,723,313
Securities held to maturity, due after five years, fair value	355,943,600
Securities held to maturity, amortized cost	379,474,205
Securities held to maturity, fair value	379,749,804	$ 320,414,899
Securities available for sale:
Securities available for sale, due in one year or less, amortized cost	1,991,755
Securities available for sale, Due in one year or less, fair value	1,996,584
Securities available for sale, due after one year through five years, amortized cost	26,984,843
Securities available for sale, Due after one year through five years, fair value	26,986,584
Securities available for sale, due after five years, amortized cost	75,608,923
Securities available for sale, Due after five years, fair value	75,738,862
Securities available for sale, single maturity, amortized cost	104,585,521
Securities available for sale, single maturity, fair value	104,722,030
Securities available for sale, amortized cost	274,058,995
Securities available for sale, fair value	272,907,907
Callable Securities [Member]
Securities available for sale:
Securities available for sale, amortized cost	62,603,036
Securities available for sale, fair value	62,805,571
US States and Political Subdivisions Debt Securities [Member]
Securities held to maturity:
Securities held to maturity, fair value	378,699,804	319,364,899
US States and Political Subdivisions Debt Securities [Member] | Callable Securities [Member]
Securities available for sale:
Securities available for sale, no single maturity, amortized cost	57,554,280
Securities available for sale, no single maturity, fair value	57,817,498
Securities available for sale, callable, amortized cost	57,554,280
Securities available for sale, callable, fair value	57,817,498
US Government-sponsored Enterprises Debt Securities [Member] | Callable Securities [Member]
Securities available for sale:
Securities available for sale, no single maturity, amortized cost	5,048,756
Securities available for sale, no single maturity, fair value	4,988,073
Securities available for sale, callable, amortized cost	5,048,756
Securities available for sale, callable, fair value	4,988,073
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Securities available for sale, no single maturity, amortized cost	165,459,470
Securities available for sale, no single maturity, fair value	163,301,304
Securities available for sale, callable, amortized cost	165,459,470
Securities available for sale, callable, fair value	163,301,304
Other Securities [Member]
Securities held to maturity:
Securities held to maturity, fair value	1,050,000	$ 1,050,000
Securities available for sale:
Securities available for sale, no single maturity, amortized cost	4,014,004
Securities available for sale, no single maturity, fair value	4,884,573
Securities available for sale, callable, amortized cost	4,014,004
Securities available for sale, callable, fair value	4,884,573
Callable Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities held to maturity:
Securities held to maturity, callable, amortized cost	208,103,672
Securities held to maturity, callable, fair value	$ 208,961,233

Note 3 - Investment Securitie65

Note 3 - Investment Securities - General Obligation and Revenue Bonds (Details)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
General Obligation Bonds [Member]
Number of issuers	131	116
Amortized cost	$ 107,337,076	$ 117,205,307
Other Investments	107,978,015	116,472,635
Average exposure per issuer (fair value)	824,260	1,004,074
Fair value	$ 107,978,015	$ 116,472,635
General Obligation Bonds [Member] | Illinois [Member]
Number of issuers	20	19
Amortized cost	$ 19,328,700	$ 29,214,559
Other Investments	19,514,024	29,308,438
Average exposure per issuer (fair value)	975,701	1,542,549
Fair value	$ 19,514,024	$ 29,308,438
General Obligation Bonds [Member] | Iowa [Member]
Number of issuers	16	27
Amortized cost	$ 13,881,689	$ 32,258,612
Other Investments	13,969,512	32,231,936
Average exposure per issuer (fair value)	873,095	1,193,775
Fair value	$ 13,969,512	$ 32,231,936
General Obligation Bonds [Member] | Missouri [Member]
Number of issuers	17	14
Amortized cost	$ 9,243,355	$ 8,291,192
Other Investments	9,308,287	8,323,245
Average exposure per issuer (fair value)	547,546	594,518
Fair value	$ 9,308,287	$ 8,323,245
General Obligation Bonds [Member] | North Dakota [Member]
Number of issuers	7	7
Amortized cost	$ 21,626,574	$ 22,169,050
Other Investments	21,724,197	21,499,075
Average exposure per issuer (fair value)	3,103,457	3,071,296
Fair value	$ 21,724,197	$ 21,499,075
General Obligation Bonds [Member] | Ohio [Member]
Number of issuers	9	8
Amortized cost	$ 8,002,705	$ 6,790,398
Other Investments	7,938,028	6,651,897
Average exposure per issuer (fair value)	882,003	831,487
Fair value	$ 7,938,028	$ 6,651,897
General Obligation Bonds [Member] | Texas [Member]
Number of issuers	17
Amortized cost	$ 11,253,775
Other Investments	11,308,848
Average exposure per issuer (fair value)	665,226
Fair value	$ 11,308,848
General Obligation Bonds [Member] | Other States [Member]
Number of issuers	45	41
Amortized cost	$ 24,000,278	$ 18,481,496
Other Investments	24,215,119	18,458,044
Average exposure per issuer (fair value)	538,114	450,196
Fair value	$ 24,215,119	$ 18,458,044
Revenue Bonds [Member]
Number of issuers	145	120
Amortized cost	$ 337,263,493	$ 257,470,290
Other Investments	337,347,285	255,496,690
Average exposure per issuer (fair value)	2,326,533	2,129,139
Fair value	$ 337,347,285	$ 255,496,690
Revenue Bonds [Member] | Illinois [Member]
Number of issuers	2
Amortized cost	$ 17,211,441
Other Investments	17,408,544
Average exposure per issuer (fair value)	8,704,272
Fair value	$ 17,408,544
Revenue Bonds [Member] | Indiana [Member]
Number of issuers	26	22
Amortized cost	$ 51,171,818	$ 47,994,737
Other Investments	50,861,336	47,582,138
Average exposure per issuer (fair value)	1,956,205	2,162,824
Fair value	$ 50,861,336	$ 47,582,138
Revenue Bonds [Member] | Iowa [Member]
Number of issuers	29	31
Amortized cost	$ 68,724,899	$ 70,788,393
Other Investments	69,079,470	71,142,393
Average exposure per issuer (fair value)	2,382,051	2,294,916
Fair value	$ 69,079,470	$ 71,142,393
Revenue Bonds [Member] | Missouri [Member]
Number of issuers	56	47
Amortized cost	$ 106,259,015	$ 90,784,441
Other Investments	106,232,837	89,664,013
Average exposure per issuer (fair value)	1,897,015	1,907,745
Fair value	$ 106,232,837	$ 89,664,013
Revenue Bonds [Member] | Kansas [Member]
Number of issuers	6	6
Amortized cost	$ 12,873,329	$ 13,476,366
Other Investments	12,877,087	13,427,491
Average exposure per issuer (fair value)	2,146,181	2,237,915
Fair value	$ 12,877,087	$ 13,427,491
Revenue Bonds [Member] | North Dakota [Member]
Number of issuers	5	4
Amortized cost	$ 11,451,560	$ 8,089,067
Other Investments	11,351,676	7,796,381
Average exposure per issuer (fair value)	2,270,335	1,949,095
Fair value	$ 11,351,676	$ 7,796,381
Revenue Bonds [Member] | Ohio [Member]
Number of issuers	10	3
Amortized cost	$ 55,766,091	$ 13,650,000
Other Investments	55,820,203	13,405,222
Average exposure per issuer (fair value)	5,582,020	4,468,407
Fair value	$ 55,820,203	$ 13,405,222
Revenue Bonds [Member] | Other States [Member]
Number of issuers	11	7
Amortized cost	$ 13,805,340	$ 12,687,286
Other Investments	13,716,132	12,479,052
Average exposure per issuer (fair value)	1,246,921	1,782,722
Fair value	$ 13,716,132	$ 12,479,052

Note 4 - Loans Leases Receiva66

Note 4 - Loans Leases Receivable (Details Textual)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)		Dec. 31, 2015USD ($)
Number of Leases	10
Leveraged Lease Investment	$ 929,932
Losses on Residual Value	0	$ 0		$ 0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	645,001	1,135,500
Financing Receivable, Recorded Investment, Nonaccrual Status	11,441,234	13,919,066
Financing Receivable, Modifications, Recorded Investment	$ 9,394,967	$ 8,647,007
Financing Receivable, Modifications, Number of Contracts	35	29
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,752,344	$ 7,880,881
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	6	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 251,940
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	65,623	$ 341,952
Threshold for Related Party Loans Evaluated	$ 60,000	$ 60,000		$ 60,000
Nonaccrual [Member]
Financing Receivable, Modifications, Number of Contracts	7	8
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 279,245	$ 2,008,424
Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,282,495	2,300,479
Residential Portfolio Segment [Member]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	645,001	1,135,500
Financing Receivable, Recorded Investment, Nonaccrual Status	1,363,806	1,075,639	[1]
Residential Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	115,190	43,579
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,231,353	4,187,786	[1]
Commercial Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	122,598	48,501
Commercial Real Estate Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,336,871	1,380,047
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,175,044	2,446,181	[1]
Finance Leases Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	700,255	816,149
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	249,091	87,344	[1]
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 7,581	$ 12,203
No Lease End Option Rider [Member]
Number of Leases		13
Leveraged Lease Investment		$ 1,085,164
[1]	At December 31, 2016, nonaccrual loans/leases included $2,300,479 of TDRs, including $48,501 in C&I loans, $1,380,047 in CRE loans, $816,149 in direct financing leases, $43,579 in residential real estate loans, and $12,203 in installment loans.

Note 4 - Loans Leases Receiva67

Note 4 - Loans Leases Receivable - Composition of the Loan Lease Portfolio (Details) - USD ($)		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Loans		$ 2,956,713,493		$ 2,397,414,282
Plus deferred loan/lease origination costs, net of fees		7,771,907		8,072,703
Gross loans/leases receivable		2,964,485,400		2,405,486,985
Less allowance		(34,355,728)		(30,757,448)		$ (26,140,906)	$ (23,074,365)
Net loans/leases receivable	[1]	2,930,129,672		2,374,729,537
Commercial Portfolio Segment [Member]
Loans	[2]	1,134,516,315		827,637,263
Less allowance		(14,323,036)		(12,545,110)		(10,484,080)	(8,833,832)
Commercial Real Estate Portfolio Segment [Member]
Loans		1,303,491,882		1,093,458,860
Less allowance		(13,962,688)		(11,670,609)		(9,375,117)	(8,353,386)
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans		332,742,477		332,387,621
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans		186,402,404		165,149,491
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans		784,347,000		595,921,748
Finance Leases Portfolio Segment [Member]
Loans	[1]	141,448,232		165,419,360
Plus deferred loan/lease origination costs, net of fees	[1]	4,624,027		5,881,778
Gross loans/leases receivable	[1]	146,072,259		171,301,138
Less allowance		(2,382,098)	[1]	(3,111,898)	[1]	(3,395,088)	(3,359,400)
Net loans/leases receivable		143,690,161		168,189,240
Net minimum lease payments to be received	[1]	156,583,887		184,274,802
Estimated unguaranteed residual values of leased assets	[1]	929,932		1,085,154
Unearned lease/residual income	[1]	(16,065,587)		(19,940,596)
Residential Portfolio Segment [Member]
Loans	[3]	258,646,265		229,233,104
Less allowance		(2,466,431)		(2,342,344)		(1,790,150)	(1,525,952)
Consumer Portfolio Segment [Member]
Loans		118,610,799		81,665,695
Less allowance		$ (1,221,475)		$ (1,087,487)		$ (1,096,471)	$ (1,001,795)
[1]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.
[2]	Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.
[3]	Includes residential real estate loans held for sale totaling $645,001 and $1,135,500 as of December 31, 2017 and 2016, respectively.

Note 4 - Loans Leases Receiva68

Note 4 - Loans Leases Receivable - Changes in Accretable Yield (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance at the beginning of the period	$ (9,309,920)
Discount added at acquisition	(2,443,891)	(12,193,588)
Accretion recognized	5,282,604	2,883,668
Balance at the end of the period	(6,471,207)	(9,309,920)
Performing Financial Instruments [Member]
Balance at the beginning of the period	(9,115,614)
Discount added at acquisition	(2,223,989)	(11,916,009)
Accretion recognized	5,059,528	2,800,395
Balance at the end of the period	(6,280,075)	(9,115,614)
Receivables Acquired with Deteriorated Credit Quality [Member]
Balance at the beginning of the period	(194,306)
Discount added at acquisition	(219,902)	(277,579)
Accretion recognized	223,076	83,273
Balance at the end of the period	$ (191,132)	$ (194,306)

Note 4 - Loans Leases Receiva69

Note 4 - Loans Leases Receivable - Aging of the Loan Lease Portfolio (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Current		$ 2,929,430,446	$ 2,378,270,983
Accruing Past Due 90 Days or More		88,671	966,814
Financing Receivable, Recorded Investment, Nonaccrual Status		11,441,234	13,919,066
Loans		$ 2,956,713,493	$ 2,397,414,282
Current as a percentage of total loan/lease portfolio		99.08%	99.20%
Accruing past due 90 days or more as a percentage of total loan/lease portfolio		0.00%	0.04%
Nonaccrual Loans/Leases as a percentage of total loan/lease portfolio		0.39%	0.58%
Loans and leases as a percentage of total loan/lease portfolio		100.00%	100.00%
Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 14,795,578	$ 3,000,574
Past due as a percentage of total loan/lease portfolio		0.50%	0.13%
Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		$ 957,563	$ 1,256,845
Past due as a percentage of total loan/lease portfolio		0.03%	0.05%
Commercial Portfolio Segment [Member]
Current		$ 1,124,734,486	$ 821,637,507
Accruing Past Due 90 Days or More			346,234
Financing Receivable, Recorded Investment, Nonaccrual Status		1,231,353	4,187,786	[1]
Loans	[2]	1,134,516,315	827,637,263
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		8,306,829	1,455,185
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		243,647	10,551
Commercial Real Estate Portfolio Segment [Member]
Loans		1,303,491,882	1,093,458,860
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Current		331,868,142	331,812,571
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		333,900	332,148	[1]
Loans		332,742,477	332,387,621
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Current		181,558,092	160,760,034
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		4,844,312	4,353,819	[1]
Loans		186,402,404	165,149,491
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Current		782,526,249	594,384,926
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		1,243,728	1,436,149	[1]
Loans		784,347,000	595,921,748
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Past Due		540,435
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Past Due			35,638
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Past Due		572,877	100,673
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Past Due			242,902
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Past Due		4,146
Finance Leases Portfolio Segment [Member]
Current		137,708,397	161,452,627
Accruing Past Due 90 Days or More			215,225
Financing Receivable, Recorded Investment, Nonaccrual Status		2,175,044	2,446,181	[1]
Loans	[3]	141,448,232	165,419,360
Finance Leases Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		1,305,191	730,627
Finance Leases Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		259,600	574,700
Residential Portfolio Segment [Member]
Current		253,261,821	227,023,552
Accruing Past Due 90 Days or More		74,519	294,854
Financing Receivable, Recorded Investment, Nonaccrual Status		1,363,806	1,075,639	[1]
Loans	[4]	258,646,265	229,233,104
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		3,552,709	473,478
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		393,410	365,581
Consumer Portfolio Segment [Member]
Current		117,773,259	81,199,766
Accruing Past Due 90 Days or More		14,152	110,501
Financing Receivable, Recorded Investment, Nonaccrual Status		249,091	87,344	[1]
Loans		118,610,799	81,665,695
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		517,537	204,973
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		$ 56,760	$ 63,111
[1]	At December 31, 2016, nonaccrual loans/leases included $2,300,479 of TDRs, including $48,501 in C&I loans, $1,380,047 in CRE loans, $816,149 in direct financing leases, $43,579 in residential real estate loans, and $12,203 in installment loans.
[2]	Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.
[3]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.
[4]	Includes residential real estate loans held for sale totaling $645,001 and $1,135,500 as of December 31, 2017 and 2016, respectively.

Note 4 - Loans Leases Receiva70

Note 4 - Loans Leases Receivable - Loans Leases Nonperforming Loans Leases (Details) - USD ($)		Dec. 31, 2017	Sep. 30, 2017		Dec. 31, 2016
Accruing Past Due 90 Days or More		$ 88,671			$ 966,814
Nonaccrual Loans/Leases		11,441,234			13,919,066
Accruing TDRs		9,394,967			8,647,007
Loans		$ 2,956,713,493			$ 2,397,414,282
Percentage of Total NPLs		100.00%			100.00%
Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More			$ 88,671		$ 966,814
Nonaccrual Loans/Leases			11,441,234	[1]	13,919,066	[2]
Accruing TDRs			7,112,472		6,346,528
Loans			$ 18,642,377		$ 21,232,408
Percentage of Total NPLs			100.00%		100.00%
Commercial Portfolio Segment [Member]
Accruing Past Due 90 Days or More					$ 346,234
Nonaccrual Loans/Leases		1,231,353			4,187,786	[2]
Loans	[3]	1,134,516,315			827,637,263
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[1]		1,231,353
Accruing TDRs			5,224,182		4,733,997
Loans			$ 6,455,535		$ 9,268,017
Percentage of Total NPLs			34.63%		43.65%
Commercial Real Estate Portfolio Segment [Member]
Loans		1,303,491,882			$ 1,093,458,860
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		333,900			332,148	[2]
Loans		332,742,477			332,387,621
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		4,844,312			4,353,819	[2]
Loans		186,402,404			165,149,491
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		1,243,728			1,436,149	[2]
Loans		784,347,000			595,921,748
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[1]		333,900
Accruing TDRs			107,322
Loans			$ 441,222		$ 332,148
Percentage of Total NPLs			2.37%		1.56%
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[1]		4,844,312
Accruing TDRs
Loans			$ 4,844,312		$ 4,353,819
Percentage of Total NPLs			25.99%		20.51%
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[1]		1,243,728
Accruing TDRs
Loans			$ 1,243,728		$ 1,436,149
Percentage of Total NPLs			6.67%		6.77%
Finance Leases Portfolio Segment [Member]
Accruing Past Due 90 Days or More					$ 215,225
Nonaccrual Loans/Leases		2,175,044			2,446,181	[2]
Loans	[4]	141,448,232			165,419,360
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[1]		2,175,044
Accruing TDRs			1,494,448		1,008,244
Loans		3,669,492	$ 3,669,492		$ 3,669,650
Percentage of Total NPLs			19.68%		17.28%
Residential Portfolio Segment [Member]
Accruing Past Due 90 Days or More		74,519			$ 294,854
Nonaccrual Loans/Leases		1,363,806			1,075,639	[2]
Loans	[5]	258,646,265			229,233,104
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More			$ 74,519
Nonaccrual Loans/Leases	[1]		1,363,806
Accruing TDRs			272,493		585,541
Loans		1,710,818	$ 1,710,818		$ 1,956,034
Percentage of Total NPLs			9.18%		9.21%
Consumer Portfolio Segment [Member]
Accruing Past Due 90 Days or More		14,152			$ 110,501
Nonaccrual Loans/Leases		249,091			87,344	[2]
Loans		118,610,799			81,665,695
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More			$ 14,152
Nonaccrual Loans/Leases	[1]		249,091
Accruing TDRs			14,027		18,746
Loans		$ 277,270	$ 277,270		$ 216,591
Percentage of Total NPLs			1.49%		1.02%
[1]	At December 31, 2017, nonaccrual loans/leases included $2,282,495 of TDRs, including $122,598 in C&I loans, $1,336,871 in CRE loans, $700,255 in direct financing leases, $115,190 in residential real estate loans, and $7,581 in installment loans.
[2]	At December 31, 2016, nonaccrual loans/leases included $2,300,479 of TDRs, including $48,501 in C&I loans, $1,380,047 in CRE loans, $816,149 in direct financing leases, $43,579 in residential real estate loans, and $12,203 in installment loans.
[3]	Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.
[4]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.
[5]	Includes residential real estate loans held for sale totaling $645,001 and $1,135,500 as of December 31, 2017 and 2016, respectively.

Note 4 - Loans Leases Receiva71

Note 4 - Loans Leases Receivable - Allowance for Estimated Losses on Loans Leases (Details) - USD ($)		3 Months Ended											12 Months Ended
		Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2017		Dec. 31, 2016
Balance						$ 30,757,448						$ 26,140,906	$ 30,757,448		$ 26,140,906		$ 23,074,365
Provision for loan/lease losses		$ 2,255,381		$ 2,086,436	$ 2,022,993	2,105,109		$ 2,599,345		$ 1,607,986	$ 1,197,850	2,072,985	8,469,919		7,478,166		6,870,900
Loans/leases charged off													(5,373,213)		(3,244,183)		(5,225,137)
Recoveries on loans/leases previously charged off													501,574		382,559		1,420,778
Balance		34,355,728						30,757,448					34,355,728		30,757,448		26,140,906
Allowance for impaired loans/leases																		$ 3,043,319		$ 3,642,968
Allowance for nonimpaired loans/leases																		31,312,409		27,114,480
Less allowance for estimated losses on loans/leases		34,355,728				30,757,448		30,757,448				26,140,906	34,355,728		30,757,448		26,140,906	34,355,728		30,757,448
Impaired loans/leases																		18,354,163		20,072,099
Nonimpaired loans/leases																		2,938,359,330		2,377,342,183
Loans																		$ 2,956,713,493		$ 2,397,414,282
Allowance as a percentage of impaired loans/leases																		16.58%		18.15%
Allowance as a percentage of nonimpaired loans/leases																		1.07%		1.14%
Total allowance as a percentage of total loans/leases																		1.16%		1.28%
Commercial Portfolio Segment [Member]
Balance						12,545,110						10,484,080	12,545,110		10,484,080		8,833,832
Provision for loan/lease losses													2,736,296		2,478,912		1,470,526
Loans/leases charged off													(1,149,790)		(527,152)		(453,782)
Recoveries on loans/leases previously charged off													191,420		109,270		633,504
Balance		14,323,036						12,545,110					14,323,036		12,545,110		10,484,080
Allowance for impaired loans/leases																		$ 715,627		$ 1,771,537
Allowance for nonimpaired loans/leases																		13,607,409		10,773,573
Less allowance for estimated losses on loans/leases		14,323,036				12,545,110		12,545,110				10,484,080	12,545,110		12,545,110		10,484,080	14,323,036		12,545,110
Impaired loans/leases																		6,248,209		8,936,451
Nonimpaired loans/leases																		1,128,268,106		818,700,812
Loans	[1]																	$ 1,134,516,315		$ 827,637,263
Allowance as a percentage of impaired loans/leases																		11.45%		19.82%
Allowance as a percentage of nonimpaired loans/leases																		1.21%		1.32%
Total allowance as a percentage of total loans/leases																		1.26%		1.52%
Commercial Real Estate Portfolio Segment [Member]
Balance						11,670,609						9,375,117	11,670,609		9,375,117		8,353,386
Provision for loan/lease losses													4,044,460		2,286,953		3,080,611
Loans/leases charged off													(1,795,229)		(24,304)		(2,560,749)
Recoveries on loans/leases previously charged off													42,848		32,843		501,869
Balance		13,962,688						11,670,609					13,962,688		11,670,609		9,375,117
Allowance for impaired loans/leases																		$ 1,429,460		$ 693,919
Allowance for nonimpaired loans/leases																		12,533,228		10,976,690
Less allowance for estimated losses on loans/leases		13,962,688				11,670,609		11,670,609				9,375,117	11,670,609		11,670,609		9,375,117	13,962,688		11,670,609
Impaired loans/leases																		6,529,262		6,112,114
Nonimpaired loans/leases																		1,296,962,620		1,087,346,746
Loans																		$ 1,303,491,882		$ 1,093,458,860
Allowance as a percentage of impaired loans/leases																		21.89%		11.35%
Allowance as a percentage of nonimpaired loans/leases																		0.97%		1.01%
Total allowance as a percentage of total loans/leases																		1.07%		1.07%
Finance Leases Portfolio Segment [Member]
Balance						3,111,898	[2]					3,395,088	3,111,898	[2]	3,395,088		3,359,400
Provision for loan/lease losses													1,369,624		2,127,463		1,688,031
Loans/leases charged off													(2,284,910)		(2,503,417)		(1,788,772)
Recoveries on loans/leases previously charged off													185,486		92,764		136,429
Balance		2,382,098	[2]					3,111,898	[2]				2,382,098	[2]	3,111,898	[2]	3,395,088
Allowance for impaired loans/leases																		$ 504,469		$ 848,919
Allowance for nonimpaired loans/leases																		1,877,629		2,262,979
Less allowance for estimated losses on loans/leases		2,382,098	[2]			3,111,898	[2]	3,111,898	[2]			3,395,088	2,382,098	[2]	3,111,898	[2]	3,395,088	2,382,098	[2]	3,111,898	[2]
Impaired loans/leases																		3,669,492		3,256,264
Nonimpaired loans/leases																		137,778,740		162,163,096
Loans	[2]																	$ 141,448,232		$ 165,419,360
Allowance as a percentage of impaired loans/leases																		13.75%		26.07%
Allowance as a percentage of nonimpaired loans/leases																		1.36%		1.40%
Total allowance as a percentage of total loans/leases																		1.68%		1.88%
Residential Portfolio Segment [Member]
Balance						2,342,344						1,790,150	2,342,344		1,790,150		1,525,952
Provision for loan/lease losses													197,034		628,114		430,087
Loans/leases charged off													(102,088)		(76,820)		(169,996)
Recoveries on loans/leases previously charged off													29,141		900		4,107
Balance		2,466,431						2,342,344					2,466,431		2,342,344		1,790,150
Allowance for impaired loans/leases																		$ 355,167		$ 289,112
Allowance for nonimpaired loans/leases																		2,111,264		2,053,232
Less allowance for estimated losses on loans/leases		2,466,431				2,342,344		2,342,344				1,790,150	2,342,344		2,342,344		1,790,150	2,466,431		2,342,344
Impaired loans/leases																		1,704,846		1,661,180
Nonimpaired loans/leases																		256,941,419		227,571,924
Loans	[3]																	$ 258,646,265		$ 229,233,104
Allowance as a percentage of impaired loans/leases																		20.83%		17.40%
Allowance as a percentage of nonimpaired loans/leases																		0.82%		0.90%
Total allowance as a percentage of total loans/leases																		0.95%		1.02%
Consumer Portfolio Segment [Member]
Balance						1,087,487						1,096,471	1,087,487		1,096,471		1,001,795
Provision for loan/lease losses													122,505		(43,276)		201,645
Loans/leases charged off													(41,196)		(112,490)		(251,838)
Recoveries on loans/leases previously charged off													52,679		146,782		144,869
Balance		1,221,475						1,087,487					1,221,475		1,087,487		1,096,471
Allowance for impaired loans/leases																		$ 38,596		$ 39,481
Allowance for nonimpaired loans/leases																		1,182,879		1,048,006
Less allowance for estimated losses on loans/leases		$ 1,221,475				$ 1,087,487		$ 1,087,487				$ 1,096,471	$ 1,087,487		$ 1,087,487		$ 1,096,471	1,221,475		1,087,487
Impaired loans/leases																		202,354		106,090
Nonimpaired loans/leases																		118,408,445		81,559,605
Loans																		$ 118,610,799		$ 81,665,695
Allowance as a percentage of impaired loans/leases																		19.07%		37.21%
Allowance as a percentage of nonimpaired loans/leases																		1.00%		1.28%
Total allowance as a percentage of total loans/leases																		1.03%		1.33%
[1]	Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.
[2]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.
[3]	Includes residential real estate loans held for sale totaling $645,001 and $1,135,500 as of December 31, 2017 and 2016, respectively.

Note 4 - Loans Leases Receiva72

Note 4 - Loans Leases Receivable - Impaired Loans Leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Recorded investment with no specific allowance recorded	$ 7,117,268	$ 4,637,593	$ 3,932,541
Unpaid principal balance with no specific allowance recorded	7,202,484	4,880,273	4,402,147
Average recorded investment with no specific allowance recorded	6,354,341	7,510,986	6,656,069
Interest income recognized with no specific allowance recorded	216,413	74,587	25,070
Interest income recognized for cash payments received with no specific allowance recorded	216,413	74,587	25,070
Recorded investment with specific allowance recorded	11,236,897	15,434,506	7,090,846
Unpaid principal balance with specific allowance recorded	11,240,836	15,512,479	7,106,685
Related allowance	3,043,319	3,642,968	3,304,287
Average recorded investment with specific allowance recorded	10,512,445	5,870,942	6,383,114
Interest income recognized with specific allowance recorded	218,621	66,247	13,606
Interest income recognized for cash payments received with specific allowance recorded	218,621	66,247	13,606
Recorded investment	18,354,163	20,072,099	11,023,387
Unpaid principal balance	18,443,318	20,392,752	11,508,832
Average recorded investment	16,866,786	13,381,928	13,039,183
Interest income recognized	435,034	140,834	38,676
Interest income recognized for cash payments received	435,034	140,834	38,676
Commercial Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	1,634,269	841,895	234,636
Unpaid principal balance with no specific allowance recorded	1,644,706	951,600	346,072
Average recorded investment with no specific allowance recorded	1,406,310	2,858,343	380,495
Interest income recognized with no specific allowance recorded	71,183	16,748	7,436
Interest income recognized for cash payments received with no specific allowance recorded	71,183	16,748	7,436
Recorded investment with specific allowance recorded	4,613,940	8,094,556	5,051,846
Unpaid principal balance with specific allowance recorded	4,617,879	8,098,395	5,055,685
Related allowance	715,627	1,771,537	2,592,270
Average recorded investment with specific allowance recorded	4,584,142	2,959,495	4,811,046
Interest income recognized with specific allowance recorded	203,221	17,742
Interest income recognized for cash payments received with specific allowance recorded	203,221	17,742
Recorded investment	6,248,209	8,936,451	5,286,482
Unpaid principal balance	6,262,585	9,049,995	5,401,757
Average recorded investment	5,990,452	5,817,838	5,191,541
Interest income recognized	274,404	34,490	7,436
Interest income recognized for cash payments received	274,404	34,490	7,436
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Recorded investment with no specific allowance recorded	289,261		256,761
Unpaid principal balance with no specific allowance recorded	289,261	93,774	350,535
Average recorded investment with no specific allowance recorded	79,317	312,242	447,144
Interest income recognized with no specific allowance recorded	11,902
Interest income recognized for cash payments received with no specific allowance recorded	11,902
Recorded investment with specific allowance recorded	151,962	322,148
Unpaid principal balance with specific allowance recorded	151,962	322,148
Related allowance	48,462	57,398
Average recorded investment with specific allowance recorded	221,260	385,269
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	441,222	322,148	256,761
Unpaid principal balance	441,222	415,922	350,535
Average recorded investment	300,577	697,511	447,144
Interest income recognized	11,902
Interest income recognized for cash payments received	11,902
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment with no specific allowance recorded
Unpaid principal balance with no specific allowance recorded			228,818
Average recorded investment with no specific allowance recorded			117,406
Interest income recognized with no specific allowance recorded
Interest income recognized for cash payments received with no specific allowance recorded
Recorded investment with specific allowance recorded	4,844,312	4,353,817	193,804
Unpaid principal balance with specific allowance recorded	4,844,312	4,353,819	205,804
Related allowance	1,379,235	577,611	76,934
Average recorded investment with specific allowance recorded	4,447,831	1,022,930	195,986
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	4,844,312	4,353,817	193,804
Unpaid principal balance	4,844,312	4,353,819	434,622
Average recorded investment	4,447,831	1,022,930	313,392
Interest income recognized
Interest income recognized for cash payments received
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Recorded investment with no specific allowance recorded	1,171,565	1,196,549	1,578,470
Unpaid principal balance with no specific allowance recorded	1,171,565	1,196,549	1,578,470
Average recorded investment with no specific allowance recorded	1,176,738	1,322,654	2,953,888
Interest income recognized with no specific allowance recorded
Interest income recognized for cash payments received with no specific allowance recorded
Recorded investment with specific allowance recorded	72,163	239,600
Unpaid principal balance with specific allowance recorded	72,163	239,600
Related allowance	1,763	58,910
Average recorded investment with specific allowance recorded	44,667	47,920
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	1,243,728	1,436,149	1,578,470
Unpaid principal balance	1,243,728	1,436,149	1,578,470
Average recorded investment	1,221,405	1,370,574	2,953,888
Interest income recognized
Interest income recognized for cash payments received
Finance Leases Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	2,944,540	1,690,121	871,884
Unpaid principal balance with no specific allowance recorded	2,944,540	1,690,121	871,884
Average recorded investment with no specific allowance recorded	2,879,695	1,731,982	892,281
Interest income recognized with no specific allowance recorded	132,167	43,461	4,142
Interest income recognized for cash payments received with no specific allowance recorded	132,167	43,461	4,142
Recorded investment with specific allowance recorded	724,953	1,566,143	829,457
Unpaid principal balance with specific allowance recorded	724,953	1,566,143	829,457
Related allowance	504,469	848,919	306,193
Average recorded investment with specific allowance recorded	625,107	841,733	474,458
Interest income recognized with specific allowance recorded		36,303
Interest income recognized for cash payments received with specific allowance recorded		36,303
Recorded investment	3,669,492	3,256,264	1,701,341
Unpaid principal balance	3,669,492	3,256,264	1,701,341
Average recorded investment	3,504,802	2,573,715	1,366,739
Interest income recognized	132,167	79,764	4,142
Interest income recognized for cash payments received	132,167	79,764	4,142
Residential Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	943,388	853,294	613,486
Unpaid principal balance with no specific allowance recorded	1,018,167	892,495	649,064
Average recorded investment with no specific allowance recorded	685,807	964,590	1,047,001
Interest income recognized with no specific allowance recorded	1,161	9,903	3,929
Interest income recognized for cash payments received with no specific allowance recorded	1,161	9,903	3,929
Recorded investment with specific allowance recorded	761,458	807,886	805,301
Unpaid principal balance with specific allowance recorded	761,458	882,018	805,301
Related allowance	355,167	289,112	185,801
Average recorded investment with specific allowance recorded	549,286	573,211	712,085
Interest income recognized with specific allowance recorded	14,990	11,675	7,913
Interest income recognized for cash payments received with specific allowance recorded	14,990	11,675	7,913
Recorded investment	1,704,846	1,661,180	1,418,787
Unpaid principal balance	1,779,625	1,774,513	1,454,365
Average recorded investment	1,235,093	1,537,801	1,759,086
Interest income recognized	16,151	21,578	11,842
Interest income recognized for cash payments received	16,151	21,578	11,842
Consumer Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	134,245	55,734	377,304
Unpaid principal balance with no specific allowance recorded	134,245	55,734	377,304
Average recorded investment with no specific allowance recorded	126,474	321,175	817,854
Interest income recognized with no specific allowance recorded		4,475	9,563
Interest income recognized for cash payments received with no specific allowance recorded		4,475	9,563
Recorded investment with specific allowance recorded	68,109	50,356	210,438
Unpaid principal balance with specific allowance recorded	68,109	50,356	210,438
Related allowance	38,596	39,481	143,089
Average recorded investment with specific allowance recorded	40,152	40,384	189,539
Interest income recognized with specific allowance recorded	410	527	5,693
Interest income recognized for cash payments received with specific allowance recorded	410	527	5,693
Recorded investment	202,354	106,090	587,742
Unpaid principal balance	202,354	106,090	587,742
Average recorded investment	166,626	361,559	1,007,393
Interest income recognized	410	5,002	15,256
Interest income recognized for cash payments received	$ 410	$ 5,002	$ 15,256

Note 4 - Loans Leases Receiva73

Note 4 - Loans Leases Receivable - Loans by Internally Assigned Risk Rating (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Loans		$ 2,956,713,493	$ 2,397,414,282
Commercial Portfolio Segment [Member]
Loans	[1]	1,134,516,315	827,637,263
Commercial Portfolio Segment [Member] | Pass [Member]
Loans		1,098,722,101	796,568,451
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans		10,944,924	6,305,772
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans		24,578,731	24,763,040
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans		270,559
Commercial Real Estate Portfolio Segment [Member]
Loans		1,303,491,882	1,093,458,860
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans		332,742,477	332,387,621
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans		186,402,404	165,149,491
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans		784,347,000	595,921,748
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans		318,293,608	314,447,662
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Loans		179,142,839	158,108,465
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans		767,119,909	582,854,048
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans		8,230,060	7,559,380
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member]
Loans		1,780,000	1,780,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans		10,068,870	4,437,122
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans		6,218,809	10,380,369
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member]
Loans		5,479,565	5,261,026
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans		7,158,221	8,630,578
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans			210
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member]
Loans
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans
Commercial and Commercial Real Estate Portfolio Segments [Member]
Loans		$ 2,438,008,197	$ 1,921,096,123
As a % of Total		100.00%	100.00%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Pass [Member]
Loans		$ 2,363,278,457	$ 1,851,978,626
As a % of Total		96.94%	96.40%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Special Mention [Member]
Loans		$ 31,023,854	$ 20,082,274
As a % of Total		1.27%	1.05%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Substandard [Member]
Loans		$ 43,435,326	$ 49,035,013
As a % of Total		1.78%	2.55%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Doubtful [Member]
Loans		$ 270,559	$ 210
As a % of Total		0.01%	0.00%
[1]	Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.

Note 4 - Loans Leases Receiva74

Note 4 - Loans Leases Receivable - Leases By Delinquency Status (Details) - USD ($)		Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Loans		$ 2,956,713,493		$ 2,397,414,282
Nonperforming Financial Instruments [Member]
Loans			$ 18,642,377	21,232,408
Finance Leases Portfolio Segment [Member]
Loans	[1]	141,448,232		165,419,360
Finance Leases Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans		137,778,740		161,749,710
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans		3,669,492	3,669,492	3,669,650
Residential Portfolio Segment [Member]
Loans	[2]	258,646,265		229,233,104
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans		256,935,448		227,277,070
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans		1,710,818	1,710,818	1,956,034
Consumer Portfolio Segment [Member]
Loans		118,610,799		81,665,695
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans		118,333,529		81,449,104
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans		277,270	$ 277,270	216,591
Lease Residential and Consumer Portfolio Segments [Member]
Loans		$ 518,705,296		$ 476,318,159
As a % of Total		100.00%		100.00%
Lease Residential and Consumer Portfolio Segments [Member] | Performing Financial Instruments [Member]
Loans		$ 513,047,716		$ 470,475,884
As a % of Total		98.91%		98.77%
Lease Residential and Consumer Portfolio Segments [Member] | Nonperforming Financial Instruments [Member]
Loans		$ 5,657,580		$ 5,842,275
As a % of Total		1.09%		1.23%
[1]	Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors, which is combined with management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider, which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values for the three and nine months ended September 30, 2017 and 2016.
[2]	Includes residential real estate loans held for sale totaling $645,001 and $1,135,500 as of December 31, 2017 and 2016, respectively.

Note 4 - Loans Leases Receiva75

Note 4 - Loans Leases Receivable - Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Number of Loans / Leases	35	29
Pre-Modification Recorded Investment	$ 2,752,344	$ 7,880,881
Post-Modification Recorded Investment	2,752,344	7,880,881
Specific Allowance	$ 62,596	$ 1,225,716
Extended Maturity [Member]
Number of Loans / Leases	3	8
Pre-Modification Recorded Investment	$ 115,236	$ 935,221
Post-Modification Recorded Investment	115,236	935,221
Specific Allowance		$ 286,735
Payment Deferral [Member]
Number of Loans / Leases	32	20
Pre-Modification Recorded Investment	$ 2,637,108	$ 5,711,920
Post-Modification Recorded Investment	2,637,108	5,711,920
Specific Allowance	$ 62,596	$ 938,981
Interest Rate Below Market Reduction [Member]
Number of Loans / Leases		1
Pre-Modification Recorded Investment		$ 1,233,740
Post-Modification Recorded Investment		1,233,740
Specific Allowance
Finance Leases Portfolio Segment [Member] | Extended Maturity [Member]
Number of Loans / Leases	3	4
Pre-Modification Recorded Investment	$ 115,236	$ 410,653
Post-Modification Recorded Investment	115,236	410,653
Specific Allowance		$ 38,476
Finance Leases Portfolio Segment [Member] | Payment Deferral [Member]
Number of Loans / Leases	24	13
Pre-Modification Recorded Investment	$ 1,703,255	$ 1,149,493
Post-Modification Recorded Investment	1,703,255	1,149,493
Specific Allowance		$ 125,940
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Number of Loans / Leases		3
Pre-Modification Recorded Investment		$ 247,476
Post-Modification Recorded Investment		247,476
Specific Allowance		$ 60,767
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Number of Loans / Leases	7	7
Pre-Modification Recorded Investment	$ 826,531	$ 4,562,427
Post-Modification Recorded Investment	826,531	4,562,427
Specific Allowance	$ 62,596	$ 813,041
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Number of Loans / Leases		1
Pre-Modification Recorded Investment		$ 277,092
Post-Modification Recorded Investment		277,092
Specific Allowance		$ 187,492
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Number of Loans / Leases	1
Pre-Modification Recorded Investment	$ 107,322
Post-Modification Recorded Investment	107,322
Specific Allowance
Commercial Real Estate Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Number of Loans / Leases		1
Pre-Modification Recorded Investment		$ 1,233,740
Post-Modification Recorded Investment		1,233,740
Specific Allowance

Note 4 - Loans Leases Receiva76

Note 4 - Loans Leases Receivable - Related Party Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance, beginning	$ 61,608,976	$ 42,012,313	$ 42,469,111
Net increase (decrease) due to change in related parties	11,926,759	19,945,960	(3,606,418)
Advances	13,090,798	4,806,616	19,040,675
Repayments	(20,184,585)	(5,155,913)	(15,891,055)
Balance, ending	$ 66,441,948	$ 61,608,976	$ 42,012,313

Note 4 - Loans Leases Receiva77

Note 4 - Loans Leases Receivable - Concentration by Industries (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Gross loans/leases receivable	$ 2,964,485,400	$ 2,405,486,985
Lessors of Non-residential Buildings [Member]
Gross loans/leases receivable	$ 400,622,681	$ 359,040,649
Percentage of total loans/leases	14.00%	15.00%
Lessors of Residential Buildings [Member]
Gross loans/leases receivable	$ 370,353,561	$ 166,036,201
Percentage of total loans/leases	12.00%	7.00%
Administration of Urban Planning and Community and Rural Development [Member]
Gross loans/leases receivable	$ 83,343,541	$ 37,097,000
Percentage of total loans/leases	3.00%	2.00%
Bank Holding Companies [Member]
Gross loans/leases receivable	$ 66,950,294	$ 66,069,612
Percentage of total loans/leases	2.00%	3.00%
Nonresidential Property Managers [Member]
Gross loans/leases receivable	$ 51,984,722	$ 76,504,076
Percentage of total loans/leases	2.00%	3.00%

Note 5 - Premises and Equipme78

Note 5 - Premises and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Leases, Rent Expense	$ 348,467	$ 334,977	$ 339,839
General Contractor [Member] | Estimated Full Contract Price to Complete Remodel [Member]
Related Party Transaction, Amounts of Transaction		3,700,000
Due to Related Parties		$ 2,200,000

Note 5 - Premises and Equipme79

Note 5 - Premises and Equipment - Components of Premises and Equipment (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Land	$ 13,466,930	$ 12,936,223
Buildings (useful lives 15 to 50 years)	53,633,788	51,546,499
Furniture and equipment (useful lives 3 to 10 years)	31,984,631	28,458,946
Premises and equipment	99,085,349	92,941,668
Less accumulated depreciation	36,247,094	32,298,160
Premises and equipment, net	$ 62,838,255	$ 60,643,508

Note 5 - Premises and Equipme80

Note 5 - Premises and Equipment - Components of Premises and Equipment (Details) (Parentheticals)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Building [Member] | Minimum [Member]
Useful lives (Year)	15 years	15 years
Building [Member] | Maximum [Member]
Useful lives (Year)	50 years	50 years
Furniture and Fixtures [Member] | Minimum [Member]
Useful lives (Year)	3 years	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Useful lives (Year)	10 years	10 years

Note 5 - Premises and Equipme81

Note 5 - Premises and Equipment - Future Minimum Rental Commitments (Details)	Dec. 31, 2017USD ($)
2,018	$ 363,791
2,019	355,727
2,020	259,798
2,021	159,708
2,022	91,969
Thereafter	62,858
	$ 1,293,851

Note 6 - Goodwill and Intangi82

Note 6 - Goodwill and Intangibles - Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance at the beginning of period	$ 13,110,913	$ 3,222,688
Goodwill from acquisition of Guaranty Bank	15,223,179	9,888,225
Balance at the end of period	28,334,092	13,110,913	$ 3,222,688
Guaranty Bank [Member]
Goodwill from acquisition of Guaranty Bank	15,223,179
Community State Bank [Member]
Goodwill from acquisition of Guaranty Bank		$ 9,888,225

Note 6 - Goodwill and Intangi83

Note 6 - Goodwill and Intangibles - Core Deposit Intangibles (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Balance at the beginning of the period	$ 7,381,213	$ 1,471,409
Amortization expense	(1,000,561)	(442,849)	$ (199,512)
Balance at the end of the period	9,078,953	7,381,213	1,471,409
Net book value	9,078,953	7,381,213	1,471,409	$ 9,078,953	$ 7,381,213
Core Deposits [Member]
Balance at the beginning of the period	7,381,213	1,471,410
Amortization expense	(1,000,561)	(442,850)
Balance at the end of the period	9,078,953	7,381,213	1,471,410
Gross carrying amount				11,046,081	8,347,780
Accumulated amortization				(1,967,128)	(966,567)
Net book value	7,381,213	7,381,213	$ 1,471,410	$ 9,078,953	$ 7,381,213
Core Deposits [Member] | Guaranty Bank [Member]
Core deposit intangible from acquisition	2,698,301
Core Deposits [Member] | Community State Bank [Member]
Core deposit intangible from acquisition		$ 6,352,653

Note 6 - Goodwill and Intangi84

Note 6 - Goodwill and Intangibles - Estimated Amortization Expense of Core Deposit Intangible (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net book value	$ 9,078,953	$ 7,381,213	$ 1,471,409
Core Deposits [Member]
2,018	1,218,202
2,019	1,196,331
2,020	1,169,934
2,021	1,139,012
2,022	1,103,565
Thereafter	3,251,909
Net book value	$ 9,078,953	$ 7,381,213	$ 1,471,410

Note 7 - Derivatives and Hedg85

Note 7 - Derivatives and Hedging Activities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ 79,757	$ 76,797
Interest Rate Cap [Member] | Cash Flow Hedging [Member]
Payments for Hedge, Investing Activities	$ 2,100,000	$ 2,100,000

Note 7 - Derivatives and Hedg86

Note 7 - Derivatives and Hedging Activities - Summary of Interest Rate Cap Derivatives (Details) - Cash Flow Hedging [Member] - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Interest Rate Cap [Member]
National Amount	$ 30,000,000
Fair value	506,700	$ 576,527
Other Assets [Member] | Interest Rate Cap 1 [Member]
National Amount	15,000,000
Fair value	190,085	179,939
Other Assets [Member] | Interest Rate Cap 2 [Member]
National Amount	15,000,000
Fair value	$ 316,615	$ 396,588

Note 7 - Derivatives and Hedg87

Note 7 - Derivatives and Hedging Activities - Changes in Fair Values of Derivative Financial Instruments (Details) - Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Unrealized loss at beginning of period, net of tax	$ (932,156)	$ (799,421)
Amount of loss recognized in other comprehensive income, net of tax	(357,762)	(208,025)
Unrealized loss at end of period, net of tax	(805,027)	(932,156)
Hedge Ineffectiveness [Member] | Noninterest Income [Member]
Amount reclassified from accumulated other comprehensive income		(76,797)
Hedge Ineffectiveness [Member] | Noninterest Expense [Member]
Amount reclassified from accumulated other comprehensive income	79,757
Caplet Amortization [Member]
Amount reclassified from accumulated other comprehensive income	$ 405,134	$ 152,087

Note 8 - Deposits (Details Text

Note 8 - Deposits (Details Textual) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Time Deposits, at or Above FDIC Insurance Limit	$ 364,329,340	$ 300,852,485
Federal Home Loan Bank of Des Moines [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	35,000,000	40,000,000
Letters of Credit Outstanding, Amount		0	$ 0
Federal Home Loan Bank of Chicago [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	10,100,000	7,000,000
Letters of Credit Outstanding, Amount	$ 0	$ 0

Note 8 - Deposits - Maturities

Note 8 - Deposits - Maturities of Certificates of Deposit (Details)	Dec. 31, 2017USD ($)
2,018	$ 478,334,220
2,019	86,231,955
2,020	18,143,039
2,021	8,223,919
2,022	5,071,695
Thereafter	67,050
	$ 596,071,878

Note 9 - Short-term Borrowing90

Note 9 - Short-term Borrowings - Short-term Borrowings (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Overnight repurchase agreements with customers	$ 7,003,122	$ 8,131,387
Federal funds purchased	6,990,000	31,840,000
	$ 13,993,122	$ 39,971,387

Note 9 - Short-term Borrowing91

Note 9 - Short-term Borrowings - Overnight Repurchase Agreement Collateralized Investment Securities (Details) - Securities Sold under Agreements to Repurchase [Member] - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities sold under repurchase agreements	$ 20,893,982	$ 19,720,338
Less: overcollateralized position	13,890,860	11,588,951
	7,003,122	8,131,387
US Government Agencies Debt Securities [Member]
Securities sold under repurchase agreements	2,077,702	630,077
Residential Mortgage Backed Securities [Member]
Securities sold under repurchase agreements	$ 18,816,280	$ 19,090,261

Note 9 - Short-term Borrowing92

Note 9 - Short-term Borrowings - Overnight Repurchase Agreements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Repurchase Agreements with Customers [Member]
Average daily balance during the period	$ 7,475,824	$ 30,082,866
Average daily interest rate during the period	0.08%	0.07%
Maximum month-end balance during the period	$ 11,829,201	$ 59,833,229
Weighted average rate as of end of period	0.15%	0.02%
Federal Funds Purchased [Member]
Average daily balance during the period	$ 13,486,239	$ 19,105,595
Average daily interest rate during the period	1.31%	0.56%
Maximum month-end balance during the period	$ 33,650,000	$ 51,750,000
Weighted average rate as of end of period	1.24%	0.70%

Note 10 - FHLB Advances (Detail

Note 10 - FHLB Advances (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Advances from Federal Home Loan Banks Shortterm	$ 165,400,000	$ 104,500,000
Federal Home Loan Bank Stock	$ 11,676,700	$ 9,271,300
Minimum [Member]
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate	1 day	1 day
Minimum [Member] | Loans Receivable [Member]
FHLB Collateral Maintenance Levels	125.00%
Maximum [Member]
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate	30 days	30 days
Maximum [Member] | Loans Receivable [Member]
FHLB Collateral Maintenance Levels	333.00%
Collateral, Loans [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 850,115,910	$ 669,513,037
Collateral, Securities [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 6,690,525

Note 10 - FHLB Advances - Matur

Note 10 - FHLB Advances - Maturity and Interest Rate Information on Advances from FHLB (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
2017, Amount due		$ 190,400,000
2017, Weighted average interest rate at year-end		1.82%
2020, Amount due		$ 1,600,000
2020, Weighted average interest rate at year-end		1.75%
Total FHLB advances, Amount due		$ 192,000,000
Total FHLB advances, Weighted average interest rate at year-end		1.82%
Federal Home Loan Bank, Advances, Putable Option [Member]
2017, Amount due	[1]		$ 112,500,000
2017, Weighted average interest rate at year-end			0.78%
2018, Amount due	[1]		$ 25,000,000
2018, Weighted average interest rate at year-end			3.35%
2020, Amount due
2020, Weighted average interest rate at year-end
Total FHLB advances, Amount due	[1]		$ 137,500,000
Total FHLB advances, Weighted average interest rate at year-end			1.25%
[1]	Of the advances outstanding, a portion have putable options which allow the FHLB, at its discretion, to terminate the advances and require the subsidiary banks to repay at predetermined dates prior to the stated maturity date of the advances.

Note 10 - FHLB Advances - Summa

Note 10 - FHLB Advances - Summary of Prepayments of FHLB Advances (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2016
Amount	$ 15,000,000	$ 5,000,000	$ 10,000,000	$ 30,000,000
Weighted Average Interest Rate	3.14%	2.84%	3.86%	3.33%
Prepayment Fees	$ 357,161	$ 127,310	$ 524,197	$ 1,008,668

Note 11 - Other Borrowings an96

Note 11 - Other Borrowings and Unused Lines of Credit (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Other Borrowings	$ 66,000,000		$ 80,000,000
Debt Instrument, Interest Rate, Effective Percentage	3.82%		3.26%
Debt Instrument, Face Amount	$ 40,210,000		$ 35,570,000
Revolving Credit Facility [Member]
Other Borrowings			5,000,000
Debt Instrument, Interest Rate, Effective Percentage	4.06%
Line of Credit Facility, Maximum Borrowing Capacity	$ 10,000,000		10,000,000
Long-term Line of Credit	$ 0
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Term Note 1 [Member]
Other Borrowings	$ 24,000,000		$ 30,000,000
Debt Instrument, Interest Rate, Effective Percentage	4.56%		3.77%
Term Note 1 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Term Note 2 [Member]
Debt Instrument, Interest Rate, Effective Percentage	4.56%
Debt Instrument, Face Amount		$ 7,000,000
Term Note 2 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Term Note [Member]
Other Borrowings	$ 31,000,000		$ 30,000,000
Debt Instrument, Periodic Payment, Principal	$ 1,937,500

Note 11 - Other Borrowings an97

Note 11 - Other Borrowings and Unused Lines of Credit - Other Borrowings (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Other borrowings	$ 66,000,000	$ 80,000,000
Revolving Credit Facility [Member]
Other borrowings		5,000,000
Whole sale Repurchase Agreements [Member]
Other borrowings	35,000,000	45,000,000
Term Note [Member]
Other borrowings	$ 31,000,000	$ 30,000,000

Note 11 - Other Borrowings an98

Note 11 - Other Borrowings and Unused Lines of Credit - Wholesale Structured Repurchase Agreement Collateralized Investment Securities (Details) - Whole sale Repurchase Agreements [Member] - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities sold under repurchase agreements	$ 65,002,722	$ 52,119,731
Less: overcollateralized position	30,002,722	7,119,731
	35,000,000	45,000,000
US Government Agencies Debt Securities [Member]
Securities sold under repurchase agreements	3,474,555	20,798,703
Residential Mortgage Backed Securities [Member]
Securities sold under repurchase agreements	$ 61,528,167	$ 31,321,028

Note 11 - Other Borrowings an99

Note 11 - Other Borrowings and Unused Lines of Credit - Summary of Prepayments of Wholesale Structured Repurchase Agreements (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amount				$ 69,769,000	$ 34,559,000
Whole sale Repurchase Agreements [Member]
Amount	$ 55,000,000	$ 10,000,000		$ 65,000,000
Weighted Average Interest Rate	3.27%	3.97%		3.38%
Prepayment Fees	$ 4,010,000	$ 759,000		$ 4,769,000

Note 11 - Other Borrowings a100

Note 11 - Other Borrowings and Unused Lines of Credit - Wholesale Repurchase Agreements (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Other borrowings	$ 66,000,000	$ 80,000,000
Whole sale Repurchase Agreements [Member]
Other borrowings	$ 35,000,000	$ 45,000,000
Weighted average interest rate at year end	2.76%	2.81%
Whole sale Repurchase Agreements [Member] | Maturing in 2017 [Member]
Other borrowings		$ 10,000,000
Weighted average interest rate at year end		3.00%
Whole sale Repurchase Agreements [Member] | Maturing in 2019 [Member]
Other borrowings	$ 10,000,000	$ 10,000,000
Weighted average interest rate at year end	3.44%	3.44%
Whole sale Repurchase Agreements [Member] | Maturing in 2020 [Member]
Other borrowings	$ 25,000,000	$ 25,000,000
Weighted average interest rate at year end	2.48%	2.48%

Note 11 - Other Borrowings a101

Note 11 - Other Borrowings and Unused Lines of Credit - Maturity Schedule of Term Note (Details) - Term Note [Member]	Dec. 31, 2017USD ($)
2,018	$ 7,750,000
2,019	7,750,000
2,020	7,750,000
2,021	7,750,000
	$ 31,000,000

Note 11 - Other Borrowings a102

Note 11 - Other Borrowings and Unused Lines of Credit - Unused Lines of Credit (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Unused lines of credit	$ 374,967,441	$ 381,409,192
Secured Debt [Member]
Unused lines of credit	2,967,441	34,409,192
Unsecured Debt [Member]
Unused lines of credit	$ 372,000,000	$ 347,000,000

Note 12 - Junior Subordinate103

Note 12 - Junior Subordinated Debentures (Details Textual) - USD ($)	Sep. 27, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 01, 2017	Feb. 29, 2004
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 3,857,275
Debt Instrument, Face Amount		40,210,000	35,570,000
Gain (Loss) on Extinguishment of Debt			$ (4,577,668)	(7,185,601)
Debt Instrument, Interest Rate, Effective Percentage		3.82%	3.26%
Junior Subordinated Debt [Member]
Debt Instrument, Term		30 years
Note Payable to QCR Holdings Capital Trust II [Member]
Debt Instrument, Face Amount						$ 12,372,000
Note Payable to QCR Holdings Capital Trust II [Member] | Junior Subordinated Debt [Member]
Extinguishment of Debt, Amount				2,100,000
Gain (Loss) on Extinguishment of Debt				$ 300,000
Debt Instrument, Interest Rate, Effective Percentage				3.18%
Note Payable to QCR Holdings Capital Trust IV [Member] | Junior Subordinated Debt [Member]
Extinguishment of Debt, Amount			$ 5,100,000
Gain (Loss) on Extinguishment of Debt			$ 1,200,000
Debt Instrument, Interest Rate, Effective Percentage			2.42%
Note Payable to QCR Holdings Capital Trust IV [Member] | Junior Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			1.80%	2.85%
Guaranty Bank and Trust Company [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt					$ 3,857,275
Debt Instrument, Face Amount	$ 7,000,000
Debt Instrument, Term	4 years

Note 12 - Junior Subordinate104

Note 12 - Junior Subordinated Debentures - Junior Subordinated Debentures (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Junior subordinated debentures		$ 37,486,487	$ 33,480,202
Junior subordinated debentures	[1]	(2,723,513)	(2,089,798)
Note Payable to QCR Holdings Capital Trust II [Member]
Junior subordinated debentures		10,310,000	10,310,000
Note Payable to Trust III [Member]
Junior subordinated debentures		8,248,000	8,248,000
Note Payable to Trust V [Member]
Junior subordinated debentures		10,310,000	10,310,000
Community National Trust II [Member]
Junior subordinated debentures		3,093,000	3,093,000
Community National Trust III [Member]
Junior subordinated debentures		3,609,000	3,609,000
Note Payable to Guaranty Bankshares Statutory Trust I [Member]
Junior subordinated debentures	[2]	$ 4,640,000
[1]	Discount on junior subordinated debt acquired in 2013 as part of the purchase of Community National and junior subordinated debt acquired in 2017 as part of the purchase of Guaranty Bank.
[2]	As part of the acquisition of Guaranty Bank, the Company assumed one junior subordinated debenture with a fair value of $3,857,275.

Note 12 - Junior Subordinate105

Note 12 - Junior Subordinated Debentures - Trust Preferred Securities (Details) - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Amount Outstanding		$ 40,210,000	$ 35,570,000
Interest Rate		3.82%	3.26%
Trust Preferred Securities [Member] | QCR Holdings Statuory Trust II [Member]
Date issued	[1]	February 2,004
Amount Outstanding	[1]	$ 10,310,000	$ 10,310,000
Interest Rate	[1]	4.54%	3.85%
Trust Preferred Securities [Member] | QCR Holdings Statuory Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread	[1]	2.85%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust III [Member]
Date issued		February 2,004
Amount Outstanding		$ 8,248,000	$ 8,248,000
Interest Rate		4.54%	3.85%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread		2.85%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust V [Member]
Date issued		February 2,006
Amount Outstanding		$ 10,310,000	$ 10,310,000
Interest Rate		2.91%	2.43%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust V [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread		1.55%
Trust Preferred Securities [Member] | Community National Statutory Trust II [Member]
Date issued		September 2,004
Amount Outstanding		$ 3,093,000	$ 3,093,000
Interest Rate		3.80%	3.17%
Trust Preferred Securities [Member] | Community National Statutory Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread		2.17%
Trust Preferred Securities [Member] | Community National Statutory Trust III [Member]
Date issued		March 2,007
Amount Outstanding		$ 3,609,000	$ 3,609,000
Interest Rate		3.32%	2.71%
Trust Preferred Securities [Member] | Community National Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread		1.75%
Trust Preferred Securities [Member] | Guaranty Bankshares Statutory Trust I [Member]
Date issued		May 2,005
Amount Outstanding		$ 4,640,000
Interest Rate		3.34%
Trust Preferred Securities [Member] | Guaranty Bankshares Statutory Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate, Basis Spread		1.75%
[1]	Original amount issued for QCR Holdings Statutory Trust II was $12,372,000.

Note 13 - Federal and State 106

Note 13 - Federal and State Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 1,143,000		$ 1,143,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	150,000		$ 150,000	$ 223,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	(2,900,000)		$ (2,918,606)
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	4,600,000		4,600,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 2,100,000		$ 2,100,000

Note 13 - Federal and State 107

Note 13 - Federal and State Income Taxes - Federal and State Income Tax Expense (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current									$ 10,976,005	$ 11,969,194	$ 5,673,774
Deferred									(6,029,555)	(3,066,407)	(2,004,532)
	$ (2,000,105)	$ 1,921,533	$ 2,635,576	$ 2,389,446	$ 2,872,412	$ 1,858,208	$ 2,153,144	$ 2,019,023	$ 4,946,450	$ 8,902,787	$ 3,669,242

Note 13 - Federal and State 108

Note 13 - Federal and State Income Taxes - Reconciliation of the Expected Federal Income Tax Expense (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Computed "expected" tax expense									$ 14,228,535	$ 12,806,351	$ 7,208,993
Effect of graduated tax rates										(250,013)	(76,973)
Tax exempt income, net									(5,653,979)	(4,343,270)	(3,461,438)
Bank-owned life insurance									630,855	619,988	616,737
State income taxes, net of federal benefit, current year									1,764,671	1,245,524	767,557
Change in unrecognized tax benefits									(53,699)	121,008	223,668
New Markets Tax Credits and other credits									(341,268)	(180,000)	(180,000)
Acquisition costs										176,050
Excess tax benefit on stock options exercised and restricted stock awards vested									(1,219,483)
Re-measurement of deferred tax asset to incorporate newly enacted tax rates									(2,918,606)
Other									(228,866)	(52,875)	(195,828)
	$ (2,000,105)	$ 1,921,533	$ 2,635,576	$ 2,389,446	$ 2,872,412	$ 1,858,208	$ 2,153,144	$ 2,019,023	$ 4,946,450	$ 8,902,787	$ 3,669,242
Computed "expected" tax expense, percentage									35.00%	35.00%	35.00%
Effect of graduated tax rates, percentage										(0.70%)	(0.40%)
Tax exempt income, net, percentage									(13.90%)	(11.90%)	(16.80%)
Bank-owned life insurance, percentage									(1.50%)	(1.70%)	(3.00%)
State income taxes, net of federal benefit, current year, percentage									4.30%	3.40%	3.70%
Change in unrecognized tax benefits, percentage									(0.10%)	0.30%	1.10%
New Markets Tax Credits and other credits, percentage									(0.80%)	(0.50%)	(0.90%)
Acquisition costs, percentage										0.50%
Excess tax benefit on stock options exercised and restricted stock awards vested, percentage									(3.00%)
Re-measurement of deferred tax asset to incorporate newly enacted tax rates, percentage									(7.20%)
Other, percentage									(0.60%)	(0.10%)	(0.90%)
Income Tax Expense (Benefit), Pprcentage									12.20%	24.30%	17.80%

Note 13 - Federal and State 109

Note 13 - Federal and State Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance, beginning	$ 1,346,967	$ 1,225,959
Impact of tax positions taken during current year	333,253	319,047
Gross (decrease) related to tax positions of prior years	(40,584)
Gross increase related to tax positions of prior years		17,789
Reduction as a result of a lapse of the applicable statute of limitations	(346,368)	(215,828)
Balance, ending	$ 1,293,268	$ 1,346,967

Note 13 - Federal and State 110

Note 13 - Federal and State Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Alternative minimum tax credits	$ 6,513,502	$ 6,513,502
New markets tax credits	2,164,727	1,797,587
Net unrealized losses on securities available for sale and derivative instruments	498,860	1,470,759
Compensation	6,282,603	8,737,976
Loan/lease losses	8,029,714	10,479,227
Net operating loss carryforwards, federal and state	959,627	1,879,746
Other	34,962	247,594
	24,483,995	31,126,391
Premises and equipment	2,400,397	4,899,107
Equipment financing leases	15,367,705	22,050,540
Acquisition fair value adjustments	1,864,599	1,336,338
Investment accretion	30,656	46,581
Deferred loan origination fees, net	115,153	261,915
Other	430,125	456,219
	20,208,635	29,050,700
Net deferred tax assets	$ 4,275,360	$ 2,075,691

Note 13 - Federal and State 111

Note 13 - Federal and State Income Taxes - The Change in Deferred Income Taxes (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Provision for income taxes		$ (6,029,555)	$ (3,066,407)	$ (2,004,532)
Net deferred tax asset acquired			(3,310,553)
Net deferred tax asset resulting from market value adjustments of acquisitions		243,195	5,110,015
Re-measurement of deferred tax asset to incorporate newly enacted tax rates	$ 2,900,000	2,918,606
Statement of stockholders' equity- Other comprehensive income (loss)		668,085	(202,691)	(81,524)
		$ (2,199,669)	$ (1,469,636)	$ (2,086,056)

Note 14 - Employee Benefit P112

Note 14 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	4.50%
Defined Contribution Plan, Cost	$ 400,784	$ 322,575	$ 297,826
Deferred Compensation Liability, Current and Noncurrent	12,346,935	10,455,183	8,875,025	$ 7,503,692
Deferred Compensation Arrangement with Individual, Contributions by Employer	932,921	794,168	693,656
Minimum [Member] | Certain Executive Officers [Member]
Deferred Compensation Arrangement with Individual, Contributions by Employer	$ 8,000
Interest on Deferred Compensation Amounts	4.00%
Maximum [Member] | Certain Executive Officers [Member]
Deferred Compensation Arrangement with Individual, Contributions by Employer	$ 25,000
Interest on Deferred Compensation Amounts	12.00%
Supplemental Executive Retirement Plans [Member]
Deferred Compensation Liability, Current and Noncurrent	$ 4,330,313	4,093,355
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 163,826	163,825	$ 163,824
Certain Management Officers [Member]s [Member] | Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Interest on Deferred Compensation Amounts	4.00%
Certain Management Officers [Member]s [Member] | Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	10.00%
Interest on Deferred Compensation Amounts	8.00%
Agreements with Certain Management and Executive Officers [Member]
Deferred Compensation Liability, Current and Noncurrent	$ 12,346,935	$ 10,455,183
First 3% of Employees Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	100.00%
Match at 100% [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%
From 4% to 4.5% of Employees Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%
Matched at 50% [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%

Note 14 - Employee Benefit P113

Note 14 - Employee Benefit Plans - Profit Sharing Contributions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Matching contribution	$ 1,663,198	$ 1,365,111	$ 1,314,276
	$ 1,663,198	$ 1,365,111	$ 1,314,276

Note 14 - Employee Benefit P114

Note 14 - Employee Benefit Plans - Deferred Compensation Agreements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 10,455,183	$ 8,875,025	$ 7,503,692
Employee deferrals	932,921	794,168	693,656
Company match and interest	1,024,933	848,831	726,001
Cash payments made	(66,102)	(62,841)	(48,324)
Balance	$ 12,346,935	$ 10,455,183	$ 8,875,025

Note 15 - Stock-based Compen115

Note 15 - Stock-based Compensation (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	351,205
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Grant Date Fair Value	$ 925,735	$ 632,255	$ 598,341
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	7 years
The 2008 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	250,000
2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	350,000
The 2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	350,000
The 2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	400,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	187,921
Maximum Amount per Employee per Offering Period for Employee Stock Purchase Plan	$ 10,000
Maximum Amount per Employee per Offering Period for Employee Stock Purchase Plan, Percent	10.00%	8.00%	8.00%

Note 15 - Stock-based Compen116

Note 15 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allocated Share-based Compensation Expense	$ 1,187,035	$ 947,174	$ 941,469
Employee Stock Option [Member]
Allocated Share-based Compensation Expense	554,435	424,904	393,114
Restricted Stock [Member]
Allocated Share-based Compensation Expense	552,907	460,853	492,410
Employee Stock Purchase Plan [Member]
Allocated Share-based Compensation Expense	$ 79,694	$ 61,417	$ 55,945

Note 15 - Stock-based Compen117

Note 15 - Stock-based Compensation - Stock Option Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Outstanding, shares (in shares)	587,961	623,176	661,771
Outstanding, Weighted average exercise price (in dollars per share)	$ 14.83	$ 13.88	$ 13.89
Granted, shares (in shares)	43,250	76,749	73,403
Granted, Weighted average exercise price (in dollars per share)	$ 43.86	$ 22.92	$ 17.63
Exercised, shares (in shares)	(114,100)	(111,423)	(79,638)
Exercised, Weighted average exercise price (in dollars per share)	$ 15.12	$ 14.97	$ 14.70
Forfeited, shares (in shares)	(3,557)	(541)	(32,360)
Forfeited, Weighted average exercise price (in dollars per share)	$ 26.74	$ 18.36	$ 20.69
Outstanding, shares (in shares)	513,554	587,961	623,176
Outstanding, Weighted average exercise price (in dollars per share)	$ 17.13	$ 14.83	$ 13.88
Exercisable, , shares (in shares)	354,269	385,372	405,832
Weighted-average grant date fair value (in dollars per share)	$ 14.75	$ 7.31	$ 5.11

Note 15 - Stock-based Compen118

Note 15 - Stock-based Compensation - Options Outstanding (Details)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Number outstanding (in shares) | shares	513,554
Number exercisable (in shares) | shares	354,269
Range 1 [Member]
Exercise price range, lower range (in dollars per share)	$ 7.99
Exercise price range, upper range (in dollars per share)	$ 8.93
Number outstanding (in shares) | shares	27,850
Weighted average remaining contractual life (Year)	3 years 21 days
Weighted average exercise price options outstanding (in dollars per share)	$ 8.09
Number exercisable (in shares) | shares	27,850
Weighted average exercise price options exercisable (in dollars per share)	$ 8.09
Range 2 [Member]
Exercise price range, lower range (in dollars per share)	9
Exercise price range, upper range (in dollars per share)	$ 9.30
Number outstanding (in shares) | shares	148,755
Weighted average remaining contractual life (Year)	2 years 281 days
Weighted average exercise price options outstanding (in dollars per share)	$ 9.22
Number exercisable (in shares) | shares	147,955
Weighted average exercise price options exercisable (in dollars per share)	$ 9.22
Range 3 [Member]
Exercise price range, lower range (in dollars per share)	15
Exercise price range, upper range (in dollars per share)	$ 16.85
Number outstanding (in shares) | shares	90,668
Weighted average remaining contractual life (Year)	4 years 215 days
Weighted average exercise price options outstanding (in dollars per share)	$ 15.63
Number exercisable (in shares) | shares	79,369
Weighted average exercise price options exercisable (in dollars per share)	$ 15.64
Range 4 [Member]
Exercise price range, lower range (in dollars per share)	17.10
Exercise price range, upper range (in dollars per share)	$ 18
Number outstanding (in shares) | shares	132,816
Weighted average remaining contractual life (Year)	6 years 208 days
Weighted average exercise price options outstanding (in dollars per share)	$ 17.31
Number exercisable (in shares) | shares	81,521
Weighted average exercise price options exercisable (in dollars per share)	$ 17.26
Range 5 [Member]
Exercise price range, lower range (in dollars per share)	21.71
Exercise price range, upper range (in dollars per share)	$ 31.53
Number outstanding (in shares) | shares	70,215
Weighted average remaining contractual life (Year)	8 years 29 days
Weighted average exercise price options outstanding (in dollars per share)	$ 22.63
Number exercisable (in shares) | shares	16,273
Weighted average exercise price options exercisable (in dollars per share)	$ 22.64
Range 6 [Member]
Exercise price range, upper range (in dollars per share)	$ 48.50
Number outstanding (in shares) | shares	43,250
Weighted average remaining contractual life (Year)	9 years 73 days
Weighted average exercise price options outstanding (in dollars per share)	$ 43.86
Number exercisable (in shares) | shares	1,301
Weighted average exercise price options exercisable (in dollars per share)	$ 42.75

Note 15 - Stock-based Compen119

Note 15 - Stock-based Compensation - Restricted Stock Awards (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Outstanding, beginning (in shares)	39,438	45,046	49,833
Granted (in shares)	28,289	22,382	28,846
Released (in shares)	(21,338)	(27,490)	(33,633)
Forfeited (in shares)		(500)
Outstanding, ending (in shares)	46,389	39,438	45,046
Weighted average fair value per share granted (in dollars per share)	$ 44.44	$ 22.64	$ 17.80

Note 15 - Stock-based Compen120

Note 15 - Stock-based Compensation - Stock Purchase Plan (Details) - Employee Stock Purchase Plan [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Shares granted (in shares)	12,414	18,711	23,408
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan (in shares)	13,318	20,192	24,033
Weighted average fair value per share granted (in dollars per share)	$ 6.42	$ 3.28	$ 2.39

Note 16 - Regulatory Capital121

Note 16 - Regulatory Capital Requirements and Restrictions on Dividends (Details Textual) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Oct. 27, 2016
Annual Phase in Percentage Of Capital Conservation Buffer		0.625%
Capital Required for Capital Adequacy to Risk Weighted Assets with Capital Conservation Buffer Fully Phased in		10.50%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets with Capital Conservation Buffer Fully Phased in		8.50%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets with Capital Conservation Buffer Fully Phased in		7.00%
Shelf Registration Maximum Value of Equity Authorized For Issuance			$ 100
Proceeds From Issuance of Common Stock Gross	$ 30.1

Note 16 - Regulatory Capital122

Note 16 - Regulatory Capital Requirements and Restrictions on Dividends - Capital Requirements (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Total risk-based capital, actual, amount		$ 383,282	$ 327,440
Total risk-based capital, actual, ratio		11.15%	11.56%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer		$ 275,090	$ 226,587
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer		8.00%	8.00%
Total risk-based capital for capital adquacy purposes, amount	[1]	$ 318,073	$ 244,289
Total risk-based capital for capital adquacy purposes, ratio	[1]	9.25%	8.625%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 343,862	$ 283,233
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%	10.00%
Tier 1 risk-based capital, actual, amount		$ 348,530	$ 296,366
Tier 1 risk-based capital, actual, ratio		10.14%	10.46%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 206,317	$ 169,940
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount	[1]	$ 249,300	$ 187,642
Tier 1 risk-based capital for capital adequacy purposes, ratio	[1]	7.25%	6.625%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 275,090	$ 226,587
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%	8.00%
Tier 1 leverage, actual, amount		$ 348,530	$ 296,366
Tier 1 leverage, actual, ratio		8.98%	9.10%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 155,256	$ 130,229
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	[1]	$ 155,256	$ 130,229
Tier 1 leverage for capital adequacy purposes, ratio	[1]	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 194,070	$ 162,787
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%	5.00%
Common equity Tier 1, actual, amount		$ 313,012	$ 266,419
Common equity Tier 1, actual ratio		9.10%	9.41%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 154,738	$ 127,455
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	[1]	$ 197,721	$ 145,157
Common equity Tier 1 for capital adequacy purposes, ratio	[1]	5.75%	5.125%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 223,510	$ 184,102
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%	6.50%
Quad City Bank and Trust Company [Member]
Total risk-based capital, actual, amount		$ 160,112	$ 142,990
Total risk-based capital, actual, ratio		12.35%	12.27%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer		$ 103,711	$ 93,212
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer		8.00%	8.00%
Total risk-based capital for capital adquacy purposes, amount	[1]	$ 119,916	$ 100,494
Total risk-based capital for capital adquacy purposes, ratio	[1]	9.25%	8.625%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 129,639	$ 116,515
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%	10.00%
Tier 1 risk-based capital, actual, amount		$ 147,472	$ 129,524
Tier 1 risk-based capital, actual, ratio		11.38%	11.12%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 77,783	$ 69,909
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount	[1]	$ 93,988	$ 77,191
Tier 1 risk-based capital for capital adequacy purposes, ratio	[1]	7.25%	6.625%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 103,711	$ 93,212
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%	8.00%
Tier 1 leverage, actual, amount		$ 147,472	$ 129,524
Tier 1 leverage, actual, ratio		9.52%	9.18%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 61,985	$ 56,445
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	[1]	$ 61,985	$ 56,445
Tier 1 leverage for capital adequacy purposes, ratio	[1]	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 77,481	$ 70,556
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%	5.00%
Common equity Tier 1, actual, amount		$ 147,472	$ 129,524
Common equity Tier 1, actual ratio		11.38%	11.12%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 58,337	$ 52,432
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	[1]	$ 74,542	$ 59,714
Common equity Tier 1 for capital adequacy purposes, ratio	[1]	5.75%	5.125%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 84,265	$ 75,735
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%	6.50%
Cedar Rapids Bank and Trust [Member]
Total risk-based capital, actual, amount		$ 138,492	$ 106,791
Total risk-based capital, actual, ratio		11.88%	12.82%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer		$ 93,272	$ 66,623
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer		8.00%	8.00%
Total risk-based capital for capital adquacy purposes, amount	[1]	$ 107,846	$ 71,828
Total risk-based capital for capital adquacy purposes, ratio	[1]	9.25%	8.625%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 116,590	$ 83,279
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%	10.00%
Tier 1 risk-based capital, actual, amount		$ 126,601	$ 96,369
Tier 1 risk-based capital, actual, ratio		10.86%	11.57%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 69,954	$ 49,968
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount	[1]	$ 84,528	$ 55,173
Tier 1 risk-based capital for capital adequacy purposes, ratio	[1]	7.25%	6.625%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 93,272	$ 66,623
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%	8.00%
Tier 1 leverage, actual, amount		$ 126,601	$ 96,369
Tier 1 leverage, actual, ratio		11.68%	10.69%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 43,348	$ 36,061
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	[1]	$ 43,348	$ 36,061
Tier 1 leverage for capital adequacy purposes, ratio	[1]	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 54,185	$ 45,076
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%	5.00%
Common equity Tier 1, actual, amount		$ 126,601	$ 96,369
Common equity Tier 1, actual ratio		10.86%	11.57%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 52,465	$ 37,476
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	[1]	$ 67,039	$ 42,681
Common equity Tier 1 for capital adequacy purposes, ratio	[1]	5.75%	5.125%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 75,783	$ 54,132
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%	6.50%
Community State Bank [Member]
Total risk-based capital, actual, amount		$ 66,271	$ 68,216
Total risk-based capital, actual, ratio		11.71%	13.81%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer		$ 45,293	$ 39,521
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer		8.00%	8.00%
Total risk-based capital for capital adquacy purposes, amount	[1]	$ 52,370	$ 42,609
Total risk-based capital for capital adquacy purposes, ratio	[1]	9.25%	8.625%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 56,616	$ 49,402
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%	10.00%
Tier 1 risk-based capital, actual, amount		$ 61,941	$ 66,746
Tier 1 risk-based capital, actual, ratio		10.94%	13.51%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 33,970	$ 29,641
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount	[1]	$ 41,047	$ 32,729
Tier 1 risk-based capital for capital adequacy purposes, ratio	[1]	7.25%	6.625%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 45,293	$ 39,522
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%	8.00%
Tier 1 leverage, actual, amount		$ 61,941	$ 66,746
Tier 1 leverage, actual, ratio		9.77%	11.75%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 25,354	$ 22,726
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	[1]	$ 25,354	$ 22,726
Tier 1 leverage for capital adequacy purposes, ratio	[1]	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 31,693	$ 28,408
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%	5.00%
Common equity Tier 1, actual, amount		$ 61,941	$ 66,746
Common equity Tier 1, actual ratio		10.94%	13.51%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 25,477	$ 22,231
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	[1]	$ 32,554	$ 25,319
Common equity Tier 1 for capital adequacy purposes, ratio	[1]	5.75%	5.125%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 36,801	$ 32,111
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%	6.50%
Rockford Bank and Trust [Member]
Total risk-based capital, actual, amount		$ 45,684	$ 42,007
Total risk-based capital, actual, ratio		11.28%	12.26%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer		$ 32,413	$ 27,410
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer		8.00%	8.00%
Total risk-based capital for capital adquacy purposes, amount	[1]	$ 37,477	$ 29,551
Total risk-based capital for capital adquacy purposes, ratio	[1]	9.25%	8.625%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 40,516	$ 34,262
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%	10.00%
Tier 1 risk-based capital, actual, amount		$ 40,615	$ 37,716
Tier 1 risk-based capital, actual, ratio		10.02%	11.01%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 24,310	$ 20,558
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount	[1]	$ 29,374	$ 22,699
Tier 1 risk-based capital for capital adequacy purposes, ratio	[1]	7.25%	6.625%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 32,413	$ 27,410
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%	8.00%
Tier 1 leverage, actual, amount		$ 40,615	$ 37,716
Tier 1 leverage, actual, ratio		8.94%	9.57%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 18,177	$ 15,772
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	[1]	$ 18,177	$ 15,772
Tier 1 leverage for capital adequacy purposes, ratio	[1]	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 22,721	$ 19,716
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%	5.00%
Common equity Tier 1, actual, amount		$ 40,615	$ 37,716
Common equity Tier 1, actual ratio		10.02%	11.01%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 18,232	$ 15,418
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	[1]	$ 23,297	$ 17,559
Common equity Tier 1 for capital adequacy purposes, ratio	[1]	5.75%	5.125%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 26,335	$ 22,270
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%	6.50%
[1]	The minimums under Basel III phase in higher by .625% (the capital conservation buffer) for all ratios other than Tier 1 leverage annually until 2019. The fully phased-in minimums are 10.5% (Total risk-based capital), 8.5% (Tier 1 risk-based capital), and 7.0% (Common equity Tier 1).

Note 17 - Earnings Per Share (D

Note 17 - Earnings Per Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	49,919	17,739	36,572

Note 17 - Earnings Per Share -

Note 17 - Earnings Per Share - Basic and Diluted (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income		$ 9,901,590	$ 7,853,935	$ 8,766,017	$ 9,184,965	$ 8,529,330	$ 6,107,501	$ 6,676,467	$ 6,373,489	$ 35,706,507	$ 27,686,787	$ 16,927,881
Basic earnings per common share (in dollars per share)		$ 0.72	$ 0.60	$ 0.67	$ 0.70	$ 0.65	$ 0.47	$ 0.54	$ 0.54	$ 2.68	$ 2.20	$ 1.64
Diluted earnings per common share (in dollars per share)		$ 0.70	$ 0.58	$ 0.65	$ 0.68	$ 0.64	$ 0.46	$ 0.53	$ 0.53	$ 2.61	$ 2.17	$ 1.61
Weighted average common shares outstanding (in shares)	[1]									13,325,128	12,570,767	10,345,286
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan** (in shares)	[2]									355,344	195,236	154,555
Weighted average common and common equivalent shares outstanding (in shares)										13,680,472	12,766,003	10,499,841
[1]	The increase in weighted average common shares outstanding from 2015 to 2016 was primarily due to the common stock issuance that occurred in conjunction with the CSB acquisition.
[2]	Excludes anti-dilutive shares of 49,919, 17,739, and 36,572 at December 31,2017, 2016 and 2015, respectively.

Note 18 - Commitments and Co125

Note 18 - Commitments and Contingencies (Details Textual) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	$ 645,001	$ 1,135,500
Loans Sold with Recourse Provisions	300,000	916,900
Cash, Uninsured Amount	42,900,000	48,500,000
Money Market Funds, at Carrying Value	136,032,073	117,985,224
Standby Letters of Credit [Member]
Other Commitment	17,283,025	15,697,469
Commitments to Extend Credit [Member]
Other Commitment	$ 791,550,060	$ 666,778,085

Note 19 - Quarterly Results 126

Note 19 - Quarterly Results of Operations (Unaudited) - Quarterly Results of Operations (Unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total interest income	$ 37,878,086	$ 33,840,865	$ 32,453,268	$ 31,345,099	$ 32,235,657	$ 26,816,735	$ 23,913,284	$ 23,502,059
Total interest expense	6,084,733	5,284,517	4,406,571	3,676,216	2,955,992	3,185,958	2,904,471	2,904,537	$ 19,452,037	$ 11,950,958	$ 13,706,529
Net interest income	31,793,353	28,556,348	28,046,697	27,668,883	29,279,665	23,630,777	21,008,813	20,597,522	116,065,281	94,516,777	76,296,724
Provision for loan/lease losses	2,255,381	2,086,436	2,022,993	2,105,109	2,599,345	1,607,986	1,197,850	2,072,985	8,469,919	7,478,166	6,870,900
Noninterest income	9,714,717	6,701,303	6,782,518	7,283,754	7,028,600	10,423,401	6,762,401	6,822,473	30,482,292	31,036,875	24,363,321
Noninterest expense	31,351,204	23,395,747	21,404,629	21,273,117	22,307,178	24,480,483	17,743,753	16,954,498	97,424,697	81,485,912	73,192,022
Income before taxes	7,901,485	9,775,468	11,401,593	11,574,411	11,401,742	7,965,709	8,829,611	8,392,512	40,652,957	36,589,574	20,597,123
Income Tax Expense (Benefit)	(2,000,105)	1,921,533	2,635,576	2,389,446	2,872,412	1,858,208	2,153,144	2,019,023	4,946,450	8,902,787	3,669,242
Net income (loss)	$ 9,901,590	$ 7,853,935	$ 8,766,017	$ 9,184,965	$ 8,529,330	$ 6,107,501	$ 6,676,467	$ 6,373,489	$ 35,706,507	$ 27,686,787	$ 16,927,881
Basic (in dollars per share)	$ 0.72	$ 0.60	$ 0.67	$ 0.70	$ 0.65	$ 0.47	$ 0.54	$ 0.54	$ 2.68	$ 2.20	$ 1.64
Diluted (in dollars per share)	$ 0.70	$ 0.58	$ 0.65	$ 0.68	$ 0.64	$ 0.46	$ 0.53	$ 0.53	$ 2.61	$ 2.17	$ 1.61

Note 20 - Parent Company Onl127

Note 20 - Parent Company Only Financial Statements - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and due from banks	$ 75,721,663	$ 70,569,993
Interest-bearing deposits at financial institutions	55,765,012	63,948,925
Securities available for sale, at fair value	272,907,907	251,113,139
Loans/leases receivable, held for investment	2,963,840,399	2,404,351,485
Premises and equipment, net	62,838,255	60,643,508
Other assets	45,817,687	37,503,284
Total assets	3,982,664,773	3,301,943,748	$ 2,593,198,275
Other borrowings	66,000,000	80,000,000
Other liabilities	53,242,979	55,690,087
Total liabilities	3,629,377,644	3,015,902,949
Common stock	13,918,168	13,106,845
Additional paid-in capital	189,077,550	156,776,642
Retained earnings	151,962,661	118,616,901
Total stockholders' equity	353,287,129	286,040,799	$ 225,885,750	$ 144,078,509
Total liabilities and stockholders' equity	3,982,664,773	3,301,943,748
Parent Company [Member]
Cash and due from banks	4,325,582	6,929,755
Interest-bearing deposits at financial institutions	601	651
Securities available for sale, at fair value	1,690,726	1,545,565
Loans/leases receivable, held for investment	1,710,000
Premises and equipment, net	4,947,572	5,104,677
Other assets	11,630,304	15,245,521
Total assets	437,366,647	375,847,099
Other borrowings	31,000,000	35,000,000
Junior subordinated debentures	37,486,487	33,480,202
Other liabilities	15,593,031	21,326,098
Total liabilities	84,079,518	89,806,300
Common stock	13,918,168	13,106,845
Additional paid-in capital	189,077,550	156,776,642
Retained earnings	151,962,661	118,616,901
Accumulated other comprehensive loss	(1,671,250)	(2,459,589)
Total stockholders' equity	353,287,129	286,040,799
Total liabilities and stockholders' equity	437,366,647	375,847,099
Parent Company [Member] | Bank Subsidiaries [Member]
Investment in bank subsidiaries	410,105,525	345,866,288
Parent Company [Member] | Non-bank Subsidiaries [Member]
Investment in bank subsidiaries	$ 2,956,337	$ 1,154,642

Note 20 - Parent Company Onl128

Note 20 - Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total interest income	$ 37,878,086	$ 33,840,865	$ 32,453,268	$ 31,345,099	$ 32,235,657	$ 26,816,735	$ 23,913,284	$ 23,502,059
Securities gains									$ (87,885)	$ 4,592,398	$ 798,983
Total revenue									165,999,610	137,502,624	114,366,574
Total interest expense	6,084,733	5,284,517	4,406,571	3,676,216	2,955,992	3,185,958	2,904,471	2,904,537	19,452,037	11,950,958	13,706,529
Salaries and employee benefits									55,722,288	46,317,060	42,967,915
Business Combination, Acquisition Related Costs									1,068,918	1,400,004
Post-acquisition compensation, transition and integration costs									4,309,565	1,041,169
Losses on debt extinguishment, net										4,577,668	7,185,601
Income tax benefit	2,000,105	(1,921,533)	(2,635,576)	(2,389,446)	(2,872,412)	(1,858,208)	(2,153,144)	(2,019,023)	(4,946,450)	(8,902,787)	(3,669,242)
Net income (loss)	$ 9,901,590	$ 7,853,935	$ 8,766,017	$ 9,184,965	$ 8,529,330	$ 6,107,501	$ 6,676,467	$ 6,373,489	35,706,507	27,686,787	16,927,881
Parent Company [Member]
Total interest income									12,802	74,489	69,774
Securities gains									6,312	37,596	262,801
Other									2,700	(2,933)	(4,436)
Total revenue									45,200,751	33,609,538	22,420,047
Total interest expense									2,658,414	1,735,769	1,679,909
Salaries and employee benefits									5,021,998	4,607,887	4,847,507
Professional fees									1,344,721	949,442	1,121,094
Business Combination, Acquisition Related Costs									1,068,918	1,400,004
Post-acquisition compensation, transition and integration costs									3,151,384	313,598
Losses on debt extinguishment, net										(1,200,000)	(300,000)
Other									1,134,139	988,057	949,041
Total expenses									14,379,574	8,794,757	8,297,551
Income before income tax benefit									30,821,177	24,814,781	14,122,496
Income tax benefit									4,885,330	2,872,006	2,805,385
Net income (loss)									35,706,507	27,686,787	16,927,881
Parent Company [Member] | Bank Subsidiaries [Member]
Equity in net income of bank subsidiaries									45,103,593	33,467,712	22,059,086
Parent Company [Member] | Non-bank Subsidiaries [Member]
Equity in net income of bank subsidiaries									$ 75,344	$ 32,674	$ 32,823

Note 20 - Parent Company Onl129

Note 20 - Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income (loss)	$ 9,901,590	$ 7,853,935	$ 8,766,017	$ 9,184,965	$ 8,529,330	$ 6,107,501	$ 6,676,467	$ 6,373,489	$ 35,706,507	$ 27,686,787	$ 16,927,881
Stock-based compensation expense									1,187,036	947,174	941,469
Securities gains, net									87,885	(4,592,398)	(798,983)
Net decrease (increase) in interest-bearing deposits at financial institutions									12,137,820	(12,904,803)	(979,283)
Calls, maturities and redemptions									43,010,478	117,876,284	211,942,737
Sales									71,091,580	134,188,737	81,410,368
Purchase of premises and equipment									(5,760,802)	(6,032,416)	(4,394,255)
Net cash (used in) provided by investing activities									(410,516,757)	(168,975,229)	(66,073,152)
Proceeds from other borrowings									7,000,000	35,000,000
Calls, maturities and scheduled principal payments									(21,000,000)		(7,350,000)
Prepayments										(69,769,000)	(34,559,000)
Retirement of junior subordinated debentures										(3,955,000)	(1,762,000)
Net proceeds from the common stock offering							$ 29,800,000
Net cash provided by financing activities									381,955,146	154,420,080	39,481,832
Net increase (decrease) in cash and due from banks									5,151,670	28,827,672	3,507,302
Cash and due from banks, beginning				70,569,993				41,742,321	70,569,993	41,742,321	38,235,019
Cash and due from banks, ending	75,721,663				70,569,993				75,721,663	70,569,993	41,742,321
Common Stock Offering 1 [Member]
Net proceeds from the common stock offering										29,828,916	63,484,123
Common Stock Offering 2 [Member]
Net proceeds from the common stock offering									2,055,507	2,105,774	1,552,673
Parent Company [Member]
Net income (loss)									35,706,507	27,686,787	16,927,881
Accretion of acquisition fair value adjustments									149,010	136,150	137,317
Depreciation									225,947	222,256	174,757
Stock-based compensation expense									1,187,036	947,174	941,469
Securities gains, net									(6,312)	(37,596)	(262,801)
Gains on debt extinguishment										(1,200,000)	(300,000)
Decrease (increase) in other assets									(968,808)	(2,346,253)	(5,929,110)
(Decrease) increase in other liabilities									(6,918,921)	5,105,251	5,502,390
Net cash provided by operating activities									5,234,256	23,046,243	4,832,689
Net decrease (increase) in interest-bearing deposits at financial institutions									50	50	189,426
Purchases										(3,873,060)	(1,764,137)
Calls, maturities and redemptions									6,312	3,800,000	1,772,719
Sales									31,713	132,738	489,828
Capital infusion, bank subsidiaries											(45,600,000)
Net cash paid for acquisitions									(3,368,909)	(80,000,000)
Purchase of premises and equipment									(68,842)	(824,498)	(1,517,157)
Net cash (used in) provided by investing activities									(3,399,676)	(80,764,770)	(46,429,321)
Proceeds from other borrowings									7,000,000	35,000,000
Calls, maturities and scheduled principal payments									(11,000,000)		(2,350,000)
Prepayments											(19,395,116)
Retirement of junior subordinated debentures										(3,955,000)	(1,762,000)
Payment of cash dividends on common and preferred stock									(2,494,260)	(1,981,541)	(782,054)
Net proceeds from the common stock offering									2,055,507	2,105,774	1,552,673
Net cash provided by financing activities									(4,438,753)	60,998,149	40,747,626
Net increase (decrease) in cash and due from banks									(2,604,173)	3,279,622	(849,006)
Cash and due from banks, beginning				$ 6,929,755				$ 3,650,133	6,929,755	3,650,133	4,499,139
Cash and due from banks, ending	$ 4,325,582				$ 6,929,755				4,325,582	6,929,755	3,650,133
Parent Company [Member] | Common Stock Offering 1 [Member]
Net proceeds from the common stock offering											63,484,123
Parent Company [Member] | Common Stock Offering 2 [Member]
Net proceeds from the common stock offering										29,828,916
Parent Company [Member] | Bank Subsidiaries [Member]
Earnings of bank subsidiaries									(45,103,593)	(33,467,712)	(22,059,086)
Distributions from bank subsidiaries									21,000,000	26,000,000	9,700,000
Parent Company [Member] | Non-bank Subsidiaries [Member]
Earnings of bank subsidiaries									(75,344)	(32,674)	(32,823)
Distributions from bank subsidiaries									$ 38,734	$ 32,860	$ 32,695

Note 20 - Parent Company Onl130

Note 20 - Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Details) (Parentheticals) - shares	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Proceeds from issuance of common stock, net of issuance costs, shares (in shares)	1,215,000
Common Stock Offering 1 [Member] | Parent Company [Member]
Proceeds from issuance of common stock, net of issuance costs, shares (in shares)			3,680,000
Common Stock Offering 2 [Member] | Parent Company [Member]
Proceeds from issuance of common stock, net of issuance costs, shares (in shares)		1,215,000

Note 21 - Fair Value - Assets M

Note 21 - Fair Value - Assets Measured At Fair Value On a Recurring and Nonrecurring Basis (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities available for sale, fair value	$ 272,907,907	$ 251,113,139
Impaired loans/leases	23,615,310	18,788,073
Fair Value, Inputs, Level 1 [Member]
Impaired loans/leases
Fair Value, Inputs, Level 2 [Member]
Impaired loans/leases
Fair Value, Inputs, Level 3 [Member]
Impaired loans/leases	23,615,310	18,788,073
Fair Value, Measurements, Recurring [Member]
Assets Fair Value	277,811,845	254,027,947
Liabilities Fair Value	4,397,238	2,338,281
Fair Value, Measurements, Recurring [Member] | Interest Rate Cap [Member]
Interest rate caps	506,700	576,527
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Interest rate caps	4,397,238	2,338,281
Derivative Liabilites	4,397,238	2,338,281
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets Fair Value	1,028	1,361
Liabilities Fair Value
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Cap [Member]
Interest rate caps
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Interest rate caps
Derivative Liabilites
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets Fair Value	277,810,817	254,026,586
Liabilities Fair Value	4,397,238	2,338,281
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Cap [Member]
Interest rate caps	506,700	576,527
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest rate caps	4,397,238	2,338,281
Derivative Liabilites	4,397,238	2,338,281
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets Fair Value
Liabilities Fair Value
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Cap [Member]
Interest rate caps
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Interest rate caps
Derivative Liabilites
US Government Agencies Debt Securities [Member]
Securities available for sale, fair value	38,096,534	46,083,607
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale, fair value	38,096,534	46,083,607
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, fair value
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, fair value	38,096,534	46,083,607
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, fair value
Residential Mortgage Backed Securities [Member]
Securities available for sale, fair value	163,301,304	147,702,127
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale, fair value	163,301,304	147,702,127
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, fair value
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, fair value	163,301,304	147,702,127
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, fair value
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, fair value	66,625,496	52,604,426
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale, fair value	66,625,496	52,604,426
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, fair value
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, fair value	66,625,496	52,604,426
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, fair value
Other Securities [Member]
Securities available for sale, fair value	4,884,573	4,722,979
Other Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale, fair value	4,884,573	4,722,979
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, fair value	1,028	1,361
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, fair value	4,883,545	4,721,618
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, fair value
Impaired Loans Leases [Member]
Impaired loans/leases	8,972,337	12,823,121
Impaired Loans Leases [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans/leases
Impaired Loans Leases [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans/leases
Impaired Loans Leases [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans/leases	8,972,337	12,823,121
Other Real Estate Owned [Member]
Impaired loans/leases	14,642,973	5,964,952
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans/leases
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans/leases
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans/leases	$ 14,642,973	$ 5,964,952

Note 21 - Fair Value - Quantita

Note 21 - Fair Value - Quantitative Information About Level Fair Value Measurements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair value	$ 23,615,310	$ 18,788,073
Impaired Loans Leases [Member]
Fair value	$ 8,972,337	12,823,121
Valuation technique	Appraisal of collateral
Impaired Loans Leases [Member] | Minimum [Member]
Appraisal adjustments	10.00%
Impaired Loans Leases [Member] | Maximum [Member]
Appraisal adjustments	50.00%
Other Securities [Member]
Fair value	$ 14,642,973	$ 5,964,952
Valuation technique	Appraisal of collateral
Other Securities [Member] | Minimum [Member]
Appraisal adjustments	0.00%
Other Securities [Member] | Maximum [Member]
Appraisal adjustments	35.00%

Note 21 - Fair Value - Carrying

Note 21 - Fair Value - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Securities held to maturity, fair value	$ 379,749,804	$ 320,414,899
Securities available for sale, fair value	272,907,907	251,113,139
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]
Cash and due from banks	75,721,663	70,569,993
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Cash and due from banks	75,721,663	70,569,993
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]
Federal funds sold	30,197,000	22,257,000
Securities held to maturity, fair value	379,474,205	322,909,056
Securities available for sale, fair value	272,907,907	251,113,139
Loans/leases receivable, net	2,921,821,953	2,362,856,277
Short-term borrowings	13,993,122	39,971,387
FHLB advances	192,000,000	137,500,000
Other borrowings	66,000,000	80,000,000
Junior subordinated debentures	37,486,487	33,480,202
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Non-maturity Deposits [Member]
Deposits	2,670,583,178	2,188,683,349
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Time Deposits [Member]
Deposits	596,071,878	480,577,924
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Interest Rate Cap [Member]
Interest rate caps	506,700	576,527
Interest rate swaps - assets	506,700	576,527
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Interest Rate Swap [Member]
Interest rate caps	4,397,238	2,338,281
Interest rate swaps - assets	4,397,238	2,338,281
Interest rate swaps - liabilities	4,397,238	2,338,281
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Interest-bearing Deposits [Member]
Interest-bearing deposits at financial institutions	55,765,012	63,948,925
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Federal funds sold	30,197,000	22,257,000
Securities held to maturity, fair value	379,749,804	320,414,899
Securities available for sale, fair value	272,907,907	251,113,139
Loans/leases receivable, net	2,892,963,000	2,344,462,740
Short-term borrowings	13,993,122	39,971,387
FHLB advances	192,115,000	138,338,000
Other borrowings	66,520,000	81,282,000
Junior subordinated debentures	29,253,624	24,881,494
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Non-maturity Deposits [Member]
Deposits	2,670,583,178	2,188,683,349
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Time Deposits [Member]
Deposits	591,772,000	479,605,000
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Interest Rate Cap [Member]
Interest rate caps	506,700	576,527
Interest rate swaps - assets	506,700	576,527
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member]
Interest rate caps	4,397,238	2,338,281
Interest rate swaps - assets	4,397,238	2,338,281
Interest rate swaps - liabilities	4,397,238	2,338,281
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Interest-bearing Deposits [Member]
Interest-bearing deposits at financial institutions	55,765,012	63,948,925
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]
Loans/leases receivable, net	8,307,719	11,873,260
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Loans/leases receivable, net	$ 8,972,337	$ 12,823,121

Note 22 - Business Segment I134

Note 22 - Business Segment Information (Details Textual)	Dec. 31, 2017
Number of Subsidiaries	4

Note 22 - Business Segment I135

Note 22 - Business Segment Information - Selected Financial Information on the Company's Business Segments (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total revenue										$ 165,999,610	$ 137,502,624	$ 114,366,574
Net interest income		$ 31,793,353	$ 28,556,348	$ 28,046,697	$ 27,668,883	$ 29,279,665	$ 23,630,777	$ 21,008,813	$ 20,597,522	116,065,281	94,516,777	76,296,724
Provision for loan/lease losses		2,255,381	2,086,436	2,022,993	2,105,109	2,599,345	1,607,986	1,197,850	2,072,985	8,469,919	7,478,166	6,870,900
Net income (loss)		9,901,590	$ 7,853,935	$ 8,766,017	$ 9,184,965	8,529,330	$ 6,107,501	$ 6,676,467	$ 6,373,489	35,706,507	27,686,787	16,927,881
Goodwill		28,334,092				13,110,913				28,334,092	13,110,913	3,222,688
Core deposit intangible		9,078,953				7,381,213				9,078,953	7,381,213	1,471,409
Total assets		3,982,664,773				3,301,943,748				3,982,664,773	3,301,943,748	2,593,198,275
Net income (loss)												16,927,881
Operating Segments [Member] | Commercial Banking Segment [Member] | Quad City Bank and Trust Company [Member]
Total revenue										58,055,715	59,442,052	52,914,705
Net interest income										46,407,078	45,081,080	40,416,563
Provision for loan/lease losses										3,908,919	4,168,166	4,367,234
Net income (loss)										22,095,055	14,116,751
Goodwill		3,222,688				3,222,688				3,222,688	3,222,688	3,222,688
Core deposit intangible
Total assets		1,541,777,558				1,395,785,241				1,541,777,558	1,395,785,241	1,336,571,694
Net income (loss)												10,333,111
Operating Segments [Member] | Commercial Banking Segment [Member] | Cedar Rapids Bank and Trust [Member]
Total revenue										45,367,035	37,242,901	37,593,652
Net interest income										31,042,302	29,205,047	26,635,659
Provision for loan/lease losses										1,050,000	950,000	1,750,000
Net income (loss)										10,712,174	12,317,545
Goodwill		15,223,179								15,223,179
Core deposit intangible		3,693,592				1,271,897				3,693,592	1,271,897	1,471,409
Total assets		1,307,376,687				913,055,738				1,307,376,687	913,055,738	866,872,406
Net income (loss)												7,695,867
Operating Segments [Member] | Commercial Banking Segment [Member] | Guaranty Bank and Trust Company [Member]
Total revenue	[1]									1,806,078
Net interest income	[1]									1,551,356
Provision for loan/lease losses	[1]
Net income (loss)	[1]									346,835
Goodwill	[1]
Core deposit intangible	[1]
Total assets	[1]
Net income (loss)	[1]
Operating Segments [Member] | Commercial Banking Segment [Member] | Community State Bank [Member]
Total revenue										31,944,152	11,406,291
Net interest income										27,020,674	10,004,729
Provision for loan/lease losses										2,783,000	1,460,000
Net income (loss)										7,047,671	2,132,252
Goodwill		9,888,225				9,888,225				9,888,225	9,888,225
Core deposit intangible		5,385,361				6,109,316				5,385,361	6,109,316
Total assets		670,516,373				600,075,798				670,516,373	600,075,798
Net income (loss)
Operating Segments [Member] | Commercial Banking Segment [Member] | Rockford Bank and Trust [Member]
Total revenue										18,035,971	16,043,894	14,816,300
Net interest income										12,707,651	11,887,201	10,854,637
Provision for loan/lease losses										728,000	900,000	753,666
Net income (loss)										2,660,364	3,235,711
Goodwill
Core deposit intangible
Total assets		461,650,765				391,154,780				461,650,765	391,154,780	367,471,639
Net income (loss)												2,402,522
Operating Segments [Member] | Wealth Management Segment [Member]
Total revenue										11,057,519	9,156,948	9,103,173
Net interest income
Provision for loan/lease losses
Net income (loss)										2,241,494	1,665,453
Goodwill
Core deposit intangible
Total assets
Net income (loss)												1,627,586
Operating Segments [Member] | Other Segments [Member]
Total revenue										232,660	109,563	363,432
Net interest income										(2,663,780)	(1,661,280)	(1,610,135)
Provision for loan/lease losses
Net income (loss)										(9,397,086)	(5,780,925)
Goodwill
Core deposit intangible
Total assets		28,267,478				34,998,902				28,267,478	34,998,902	27,605,704
Net income (loss)												(5,131,205)
Intersegment Eliminations [Member]
Total revenue										(499,520)	4,100,975	(424,688)
Net interest income
Provision for loan/lease losses
Net income (loss)
Goodwill
Core deposit intangible
Total assets		$ (26,924,088)				$ (33,126,711)				$ (26,924,088)	$ (33,126,711)	(5,323,168)
Net income (loss)
[1]	Represents financial results for Guaranty Bank for the period from October 1, 2017 through December 2, 2017, when Guaranty Bank was merged into CRBT.