Hills Bancorporation (HBIA) 10-Q 4 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	HILLS BANCORPORATION
Entity Central Index Key	732,417
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,278,711
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 36,614	$ 35,427
Investment securities available for sale at fair value (amortized cost June 30, 2016 $243,560; December 31, 2015 $261,991)	247,998	264,235
Stock of Federal Home Loan Bank	12,623	11,834
Loans held for sale	7,239	5,554
Loans, net of allowance for loan losses (June 30, 2016 $27,290; December 31, 2015 $26,510)	2,143,465	2,099,174
Property and equipment, net	34,769	33,522
Tax credit real estate investment	11,131	16,314
Accrued interest receivable	9,601	8,672
Deferred income taxes, net	12,170	11,695
Other real estate	470	439
Goodwill	2,500	2,500
Other assets	2,833	4,241
Total Assets	2,521,413	2,493,607
Liabilities
Noninterest-bearing deposits	304,155	314,968
Interest-bearing deposits	1,591,853	1,575,734
Total deposits	1,896,008	1,890,702
Other borrowings	45,132	44,051
Federal Home Loan Bank borrowings	240,000	225,000
Accrued interest payable	844	846
Other liabilities	22,041	23,271
Total Liabilities	2,204,025	2,183,870
Redeemable Common Stock Held by Employee Stock Ownership Plan (ESOP)	38,441	37,562
STOCKHOLDERS' EQUITY
Common stock, no par value; authorized 20,000,000 shares; issued June 30, 2016 10,207,552 shares; December 31, 2015 10,199,643 shares	0	0
Paid in capital	44,077	43,697
Retained earnings	304,094	294,487
Accumulated other comprehensive loss	(1,342)	(1,195)
Treasury stock at cost (June 30, 2016 926,268 shares; December 31, 2015 877,589 shares)	(29,441)	(27,252)
Total Stockholders' Equity	317,388	309,737
Less maximum cash obligation related to ESOP shares	38,441	37,562
Total Stockholders' Equity Less Maximum Cash Obligations Related to ESOP Shares	278,947	272,175
Total Liabilities & Stockholders' Equity	$ 2,521,413	$ 2,493,607

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Investment securities available for sale, amortized cost	$ 243,560	$ 261,991
Loans, allowance for loan losses	$ 27,290	$ 26,510
STOCKHOLDERS' EQUITY
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, issued (in shares)	10,207,552	10,199,643
Treasury stock at cost (in shares)	926,268	877,589

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income:
Loans, including fees	$ 22,820	$ 21,900	$ 45,348	$ 42,980
Investment securities:
Taxable	362	300	718	586
Nontaxable	800	817	1,628	1,660
Federal funds sold	74	10	118	15
Total interest income	24,056	23,027	47,812	45,241
Interest expense:
Deposits	1,904	2,110	3,825	4,274
Short-term borrowings	27	42	57	59
FHLB borrowings	2,157	1,507	4,289	2,961
Total interest expense	4,088	3,659	8,171	7,294
Net interest income	19,968	19,368	39,641	37,947
Provision for loan losses	(721)	517	(172)	455
Net interest income after provision for loan losses	20,689	18,851	39,813	37,492
Noninterest income:
Net gain on sale of loans	546	440	835	748
Trust fees	1,726	1,679	3,454	3,248
Service charges and fees	2,218	2,081	4,273	4,027
Rental revenue on tax credit real estate	0	393	0	904
Net gain on sale of other real estate owned and other repossessed assets	0	110	34	117
Other noninterest income	378	803	1,145	1,452
Noninterest income	4,868	5,506	9,741	10,496
Noninterest expenses:
Salaries and employee benefits	7,475	6,924	14,459	13,575
Occupancy	983	953	1,984	1,968
Furniture and equipment	1,357	1,309	2,761	2,607
Office supplies and postage	445	413	846	854
Advertising and business development	840	919	1,626	1,693
Outside services	1,765	1,619	3,541	3,433
Rental expenses on tax credit real estate	0	559	0	1,161
FDIC insurance assessment	320	284	623	573
Other noninterest expense	678	524	1,075	839
Noninterest expenses	13,863	13,504	26,915	26,703
Income before income taxes	11,694	10,853	22,639	21,285
Income taxes	3,727	3,383	6,972	6,435
Net income	$ 7,967	$ 7,470	$ 15,667	$ 14,850
Earnings per share:
Basic (in dollars per share)	$ 0.86	$ 0.80	$ 1.69	$ 1.59
Diluted (in dollars per share)	$ 0.85	$ 0.80	$ 1.68	$ 1.59

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 7,967	$ 7,470	$ 15,667	$ 14,850
Securities:
Net change in unrealized gain on securities available for sale	1,176	(1,721)	2,194	(588)
Reclassification adjustment for net gains realized in net income	0	0	0	0
Income taxes	(450)	658	(840)	225
Other comprehensive income on securities available for sale	726	(1,063)	1,354	(363)
Derivatives used in cash flow hedging relationships:
Net change in unrealized loss on derivatives	(678)	840	(2,431)	(252)
Income taxes	260	(321)	930	97
Other comprehensive loss on cash flow hedges	(418)	519	(1,501)	(155)
Other comprehensive (loss) income, net of tax	308	(544)	(147)	(518)
Comprehensive income	$ 8,275	$ 6,926	$ 15,520	$ 14,332

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Unearned ESOP Shares [Member]	Treasury Stock [Member]	Maximum Cash Obligation Related To ESOP Shares [Member]
Beginning Balance at Dec. 31, 2014	$ 255,528	$ 42,925	$ 271,924	$ (448)	$ (504)	$ (23,798)	$ (34,571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of 2,844 and 5,660 shares of common stock for 6 months ended June 30, 2015 and 2016, respectively	119	119
Issuance 2,048 and 2,249 shares of common stock under the employee stock purchase plan for 6 months ended June 30, 2015 and 2016, respectively	83	83
Unearned restricted stock compensation	79	79
Forfeiture of 682 shares of common stock for 6 months ended June 30, 2015, respectively	(22)	(22)
Share-based compensation	14	14
Income tax benefit related to share-based compensation	3	3
Change related to ESOP shares	(521)						(521)
Net income	14,850		14,850
Cash dividends ($0.625 and $0.65 per share for 6 months ended June 30, 2015 and 2016, respectively)	(5,854)		(5,854)
Purchase of 20,031 and 48,679 shares of common stock for 6 months ended June 30, 2015 and 2016, respectively	(839)					(839)
Other comprehensive income	(518)			(518)
Ending Balance at Jun. 30, 2015	262,922	43,201	280,920	(966)	(504)	(24,637)	(35,092)
Beginning Balance at Dec. 31, 2015	272,175	43,697	294,487	(1,195)	0	(27,252)	(37,562)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of 2,844 and 5,660 shares of common stock for 6 months ended June 30, 2015 and 2016, respectively	256	256
Issuance 2,048 and 2,249 shares of common stock under the employee stock purchase plan for 6 months ended June 30, 2015 and 2016, respectively	98	98
Unearned restricted stock compensation	7	7
Share-based compensation	16	16
Income tax benefit related to share-based compensation	3	3
Change related to ESOP shares	(879)						(879)
Net income	15,667		15,667
Cash dividends ($0.625 and $0.65 per share for 6 months ended June 30, 2015 and 2016, respectively)	(6,060)		(6,060)
Purchase of 20,031 and 48,679 shares of common stock for 6 months ended June 30, 2015 and 2016, respectively	(2,189)					(2,189)
Other comprehensive income	(147)			(147)
Ending Balance at Jun. 30, 2016	$ 278,947	$ 44,077	$ 304,094	$ (1,342)	$ 0	$ (29,441)	$ (38,441)

CONSOLIDATED STATEMENTS OF STO7

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares)	5,660	2,844
Issuance of common stock purchased under the employee stock purchase plan (in shares)	2,249	2,048
Forfeiture of common stock (in shares)	0	682
Cash dividends (in dollars per share)	$ 0.65	$ 0.625
Purchase of common stock (in shares)	48,679	20,031

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities
Net income	$ 15,667	$ 14,850
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation	1,455	1,370
Provision for loan losses	(172)	455
Share-based compensation	16	14
Forfeiture of common stock	0	(22)
Compensation expensed through issuance of common stock	354	202
Excess tax benefits from share-based compensation	(3)	(3)
Provision for deferred income taxes	(385)	(1,142)
Net gain on sale of other real estate owned and other repossessed assets	(34)	(117)
Increase in accrued interest receivable	(929)	(643)
Amortization of premium on investment securities, net	297	336
Decrease in other assets	442	882
(Increase) decrease in accrued interest payable and other liabilities	(1,266)	2,488
Loans originated for sale	(89,295)	(90,671)
Proceeds on sales of loans	88,445	88,697
Net gain on sales of loans	(835)	(748)
Net cash and cash equivalents provided by operating activities	13,757	15,948
Cash Flows from Investing Activities
Proceeds from maturities of investment securities available for sale	35,674	35,652
Purchases of investment securities available for sale	(18,329)	(25,925)
Loans made to customers, net of collections	(40,794)	(41,072)
Proceeds on sale of other real estate owned and other repossessed assets	133	360
Purchases of property and equipment	(2,702)	(5,665)
Income from tax credit real estate, net	307	440
Net cash and cash equivalents used in investing activities	(25,711)	(36,210)
Cash Flows from Financing Activities
Net increase (decrease) in deposits	5,306	(15,479)
Net increase in other borrowings	1,081	11,226
Net increase in FHLB borrowings	15,000	30,000
Excess tax benefits related to share-based compensation	3	3
Purchase of treasury stock	(2,189)	(839)
Dividends paid	(6,060)	(5,854)
Net cash and cash equivalents provided by financing activities	13,141	19,057
Increase (decrease) in cash and cash equivalents	1,187	(1,205)
Cash and cash equivalents:
Beginning of period	35,427	29,174
End of period	36,614	27,969
Cash payments for:
Interest paid to depositors	3,827	4,351
Interest paid on other obligations	4,346	3,020
Income taxes paid	6,746	5,808
Noncash activities:
Increase in maximum cash obligation related to ESOP shares	879	521
Transfers to other real estate owned	130	36
Sale and financing of other real estate owned	$ 135	$ 266

Summary of Significant Accounti

Summary of Significant Accounting Policies Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation: The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial reporting and with instructions for Form 10-Q and Regulation S-X. These financial statements include all adjustments (consisting of normal recurring accruals) which in the opinion of management are considered necessary for the fair presentation of the financial position and results of operations for the periods shown. Certain prior year amounts have been reclassified to conform to the current year presentation. The Company considers that it operates as one business segment, a commercial bank. Operating results for the six month period ended June 30, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2016. For further information, refer to the consolidated financial statements and footnotes thereto included in the Form 10-K Annual Report of Hills Bancorporation and subsidiary (the “Company”) for the year ended December 31, 2015 filed with the Securities Exchange Commission on March 9, 2016 . The consolidated balance sheet as of December 31, 2015 , has been derived from the audited consolidated financial statements for that period. The Company evaluated subsequent events through the filing date of its quarterly report on Form 10-Q with the SEC. Effect of New Financial Accounting Standards: In May 2014, the FASB and International Accounting Standards Board (IASB) issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of ASU 2014-09 is that a company should recognize revenue to depict the transfer of promised good or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. For financial institutions, significant changes are not expected given that most financial instruments are not in the scope of the accounting standard update. ASU 2014-09 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. In August 2015, FASB issued ASU 2015-14 deferring the effective date for annual periods and interim periods within those annual periods after December 15, 2017. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The adoption of ASU 2014-09 by the Company is not expected to have a material impact. In February 2015, the FASB issued ASU No. 2015-02 (Topic 810), Consolidation . The ASU modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIE) or voting interest entities (VOE). The standard relaxes existing criteria for determining when fees paid to a decision maker or service provider do not represent a variable interest by focusing on whether those fees are "at market". The ASU eliminates both the consolidation model specific to limited partnerships and the current presumption that a general partner controls a limited partnership. For public companies, ASU 2015-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Company adopted the accounting standard for the period ending March 31, 2016 and have changed the accounting for its tax credit limited partnership investments to the equity method. The impact of the change was determined to not be material. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30), Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this update. For public companies, ASU 2015-03 is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted ASU 2015-03 for the period ending March 31, 2016. There was no material impact on the financial statements. In April 2015, the FASB issued ASU No. 2015-05, Intangibles – Goodwill and Other Internal-Use Software (Subtopic 350-40), Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 provides guidance to customers about whether a cloud computing arrangement includes a software license. If it does, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. The adoption of ASU 2015-05 by the Company did not have a material impact. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 created Subtopic 321-10, Investments-Equity Securities which is applicable to all entities except those in industries that account for substantially all investments at fair value through earnings or the change in net assets. Under this new subtopic, equity securities are generally required to be measured at fair value with unrealized holding gains and losses reflected in net income. ASU 2016-01 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The adoption of ASU 2016-01 by the Company is not expected to have a material impact. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842), Leases . The ASU provides guidance requiring lessees to recognize right-of-use assets and lease liabilities for all leases other than those that meet the definition of short-term leases. For short-term leases, lessees may elect an accounting policy by class of underlying asset under which these assets and liabilities are not recognized and lease payments are generally recognized over the lease term on a straight-line basis. Under this new ASU, lessees will recognize right-of use assets and lease liabilities for most leases currently accounted for as operating leases under generally accepted accounting principles. For public companies, ASU 2016-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The adoption of ASU 2016-02 by the Company is not expected to have a material impact. In March 2016, the FASB issued ASU No. 2016-04, Liabilities - Extinguishments of Liabilities (Subtopic 405-20), Recognition of Breakage for Certain Prepaid Stored-Value Products . ASU 2016-04 applies to all entities that offer certain prepaid stored - value products. The ASU provides guidance for the derecognition of financial liabilities related to the issuance of these products and aligns the recognition of breakage to current authoritative guidance. For public companies, ASU 2016-04 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The adoption of ASU 2016-04 by the Company is not expected to have a material impact. In March 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting . The ASU simplifies several aspects of the accounting for share-based payment transaction, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public companies, ASU 2016-09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The adoption of ASU 2016-09 by the Company is not expected to have a material impact. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The ASU changes the way entities recognize impairment of financial assets by requiring immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets. For public companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently reviewing the provisions of this standard to determine the impact on the Company's financial statements.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed using the weighted average number of actual common shares outstanding during the period. Diluted earnings per share reflects the potential dilution that would occur from the exercise of common stock options outstanding. ESOP shares are considered outstanding for this calculation unless unearned. On March 24, 2015, the Company declared a payment of a 2 -for-1 stock split of each issued and unissued share of the Company's common stock outstanding as of April 27, 2015. The additional shares were issued as a result of the stock split and were mailed to the shareholders as of May 4, 2015. All shares and earnings per share numbers have been restated for the stock split. The computation of basic and diluted earnings per share for the periods presented is as follows: Three Months Ended June 30, Six Months Ended 2016 2015 2016 2015 Common shares outstanding at the beginning of the period 9,289,662 9,362,061 9,322,054 9,365,176 Weighted average number of net shares redeemed (3,339 ) (7,153 ) (24,752 ) (6,075 ) Weighted average shares outstanding (basic) 9,286,323 9,354,908 9,297,302 9,359,101 Weighted average of potential dilutive shares attributable to stock options granted, computed under the treasury stock method 6,481 5,448 6,259 5,159 Weighted average number of shares (diluted) 9,292,804 9,360,356 9,303,561 9,364,260 Net income (In thousands) $ 7,967 $ 7,470 $ 15,667 $ 14,850 Earnings per share: Basic $ 0.86 $ 0.80 $ 1.69 $ 1.59 Diluted $ 0.85 $ 0.80 $ 1.68 $ 1.59

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) The following table summarizes the balances of each component of accumulated other comprehensive income (AOCI), included in stockholders’ equity, at June 30, 2016 and December 31, 2015 : June 30, December 31, 2015 (amounts in thousands) Net unrealized gain on available-for-sale securities $ 4,438 $ 2,244 Net unrealized loss on derivatives used for cash flow hedges (6,611 ) (4,180 ) Tax effect $ 831 $ 741 Net-of-tax amount $ (1,342 ) $ (1,195 )

Securities

Securities	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The carrying values of investment securities at June 30, 2016 and December 31, 2015 are summarized in the following table (dollars in thousands): June 30, 2016 December 31, 2015 Amount Percent Amount Percent Securities available for sale U.S. Treasury $ 25,342 10.22 % $ 24,978 9.45 % Other securities (FHLB, FHLMC and FNMA) 63,315 25.53 65,328 24.72 State and political subdivisions 159,341 64.25 173,929 65.83 Total securities available for sale $ 247,998 100.00 % $ 264,235 100.00 % Investment securities have been classified in the consolidated balance sheets according to management’s intent. Available-for-sale securities consist of debt securities not classified as trading or held to maturity. Available-for-sale securities are stated at fair value, and unrealized holding gains and losses, net of the related deferred tax effect, are reported as a separate component of stockholders' equity. There were no trading or held to maturity securities as of June 30, 2016 or December 31, 2015 . The carrying amount of available-for-sale securities and their approximate fair values were as follows as of June 30, 2016 and December 31, 2015 (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Estimated Fair Value June 30, 2016: U.S. Treasury $ 24,917 $ 425 $ — $ 25,342 Other securities (FHLB, FHLMC and FNMA) 62,748 568 (1 ) 63,315 State and political subdivisions 155,895 3,469 (23 ) 159,341 Total $ 243,560 $ 4,462 $ (24 ) $ 247,998 December 31, 2015: U.S. Treasury $ 24,893 $ 92 $ (7 ) $ 24,978 Other securities (FHLB, FHLMC and FNMA) 65,400 81 (153 ) 65,328 State and political subdivisions 171,698 2,375 (144 ) 173,929 Total $ 261,991 $ 2,548 $ (304 ) $ 264,235 The amortized cost and estimated fair value of available-for-sale securities classified according to their contractual maturities at June 30, 2016 , were as follows (in thousands): Amortized Cost Fair Value Due in one year or less $ 35,094 $ 35,245 Due after one year through five years 144,645 147,041 Due after five years through ten years 62,485 64,374 Due over ten years 1,336 1,338 Total $ 243,560 $ 247,998 As of June 30, 2016 investment securities with a carrying value of $70.16 million were pledged to collateralize repurchase agreements, derivative financial instruments, and other borrowings. The following table shows the fair value, gross unrealized losses and the percentage of fair value represented by gross unrealized losses of applicable investment securities owned by the Company, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2016 and December 31, 2015 (in thousands): Less than 12 months 12 months or more Total June 30, 2016 # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % U.S. Treasury — $ — $ — — % — $ — $ — — % — $ — $ — — % Other securities (FHLB, FHLMC and FNMA) 1 1,802 (1 ) 0.06 — — — — 1 1,802 (1 ) 0.06 State and political subdivisions 11 2,735 (6 ) 0.22 15 2,558 (17 ) 0.66 26 5,293 (23 ) 0.43 Total temporarily impaired securities 12 $ 4,537 $ (7 ) 0.15 % 15 $ 2,558 $ (17 ) 0.66 % 27 $ 7,095 $ (24 ) 0.34 % Less than 12 months 12 months or more Total December 31, 2015 # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % U.S. Treasury 3 $ 7,455 $ (7 ) 0.09 % — $ — $ — — % 3 $ 7,455 $ (7 ) 0.09 % Other securities (FHLB, FHLMC and FNMA) 15 36,830 (153 ) 0.42 — — — — 15 36,830 (153 ) 0.42 State and political subdivisions 56 13,557 (70 ) 0.52 27 5,633 (74 ) 1.31 83 19,190 (144 ) 0.75 Total temporarily impaired securities 74 $ 57,842 $ (230 ) 0.40 % 27 $ 5,633 $ (74 ) 1.31 % 101 $ 63,475 $ (304 ) 0.48 % The Company considered the following information in reaching the conclusion that the impairments disclosed in the table above are temporary and not other-than-temporary impairments. None of the unrealized losses in the above table was due to the deterioration in the credit quality of any of the issues that might result in the non-collection of contractual principal and interest. The unrealized losses are due to changes in interest rates. The Company has not recognized any unrealized loss in income because management does not have the intent to sell the securities included in the previous table. Management has concluded that it is more likely than not that the Company will not be required to sell these securities prior to recovery of the amortized cost basis.

Loans

Loans	6 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Loans	Loans Classes of loans are as follows: June 30, December 31, (Amounts In Thousands) Agricultural $ 89,129 $ 101,588 Commercial and financial 170,346 184,199 Real estate: Construction, 1 to 4 family residential 57,720 51,346 Construction, land development and commercial 117,738 83,121 Mortgage, farmland 191,194 187,856 Mortgage, 1 to 4 family first liens 743,450 727,160 Mortgage, 1 to 4 family junior liens 119,288 117,873 Mortgage, multi-family 285,588 271,974 Mortgage, commercial 319,825 323,409 Loans to individuals 24,485 24,019 Obligations of state and political subdivisions 51,199 52,371 $ 2,169,962 $ 2,124,916 Net unamortized fees and costs 793 768 $ 2,170,755 $ 2,125,684 Less allowance for loan losses 27,290 26,510 $ 2,143,465 $ 2,099,174 Changes in the allowance for loan losses, the allowance for loan losses applicable to impaired loans and the related loan balance of impaired loans for the three and six months ended June 30, 2016 were as follows: Three Months Ended June 30, 2016 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,954 $ 4,311 $ 2,759 $ 3,944 $ 8,036 $ 4,190 $ 936 $ 27,130 Charge-offs (25 ) (79 ) — — (184 ) — (108 ) (396 ) Recoveries 30 367 555 — 279 8 38 1,277 Provision 38 (588 ) (416 ) (17 ) 95 3 164 (721 ) Ending balance $ 2,997 $ 4,011 $ 2,898 $ 3,927 $ 8,226 $ 4,201 $ 1,030 $ 27,290 Six Months Ended June 30, 2016 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 3,082 $ 4,517 $ 2,280 $ 3,342 $ 8,172 $ 4,223 $ 894 $ 26,510 Charge-offs (25 ) (134 ) — (10 ) (528 ) (66 ) (277 ) (1,040 ) Recoveries 172 620 607 — 492 19 82 1,992 Provision (232 ) (992 ) 11 595 90 25 331 (172 ) Ending balance $ 2,997 $ 4,011 $ 2,898 $ 3,927 $ 8,226 $ 4,201 $ 1,030 $ 27,290 Ending balance, individually evaluated for impairment $ 837 $ 217 $ 13 $ 638 $ 246 $ 75 $ 70 $ 2,096 Ending balance, collectively evaluated for impairment $ 2,160 $ 3,794 $ 2,885 $ 3,289 $ 7,980 $ 4,126 $ 960 $ 25,194 Loans: Ending balance $ 89,129 $ 170,346 $ 175,458 $ 191,194 $ 862,738 $ 605,413 $ 75,684 $ 2,169,962 Ending balance, individually evaluated for impairment $ 12,577 $ 2,303 $ 698 $ 8,514 $ 5,646 $ 4,043 $ 70 $ 33,851 Ending balance, collectively evaluated for impairment $ 76,552 $ 168,043 $ 174,760 $ 182,680 $ 857,092 $ 601,370 $ 75,614 $ 2,136,111 Changes in the allowance for loan losses for the three and six months ended June 30, 2015 were as follows: Three Months Ended June 30, 2015 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,544 $ 4,358 $ 2,250 $ 2,777 $ 7,456 $ 4,125 $ 850 $ 24,360 Charge-offs (214 ) (250 ) (63 ) — (321 ) (1 ) (102 ) (951 ) Recoveries 1 334 153 — 146 1,200 40 1,874 Provision 452 256 685 48 115 (1,213 ) 174 517 Ending balance $ 2,783 $ 4,698 $ 3,025 $ 2,825 $ 7,396 $ 4,111 $ 962 $ 25,800 Six Months Ended June 30, 2015 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,515 $ 4,231 $ 2,241 $ 2,672 $ 7,419 $ 4,195 $ 747 $ 24,020 Charge-offs (257 ) (316 ) (147 ) — (668 ) (180 ) (150 ) (1,718 ) Recoveries 83 735 304 6 559 1,270 86 3,043 Provision 442 48 627 147 86 (1,174 ) 279 455 Ending balance $ 2,783 $ 4,698 $ 3,025 $ 2,825 $ 7,396 $ 4,111 $ 962 $ 25,800 Ending balance, individually evaluated for impairment $ 2 $ 507 $ 11 $ — $ 76 $ 55 $ 15 $ 666 Ending balance, collectively evaluated for impairment $ 2,781 $ 4,191 $ 3,014 $ 2,825 $ 7,320 $ 4,056 $ 947 $ 25,134 Loans: Ending balance $ 91,095 $ 172,854 $ 151,533 $ 173,529 $ 808,273 $ 553,924 $ 75,818 $ 2,027,026 Ending balance, individually evaluated for impairment $ 1,593 $ 2,481 $ 656 $ 2,314 $ 3,707 $ 3,407 $ 15 $ 14,173 Ending balance, collectively evaluated for impairment $ 89,502 $ 170,373 $ 150,877 $ 171,215 $ 804,566 $ 550,517 $ 75,803 $ 2,012,853 The following table presents the credit quality indicators by type of loans in each category as of June 30, 2016 and December 31, 2015 , respectively (amounts in thousands): Agricultural Commercial and Financial Real Estate: Construction, 1 to 4 family residential Real Estate: Construction, land development and commercial June 30, 2016 Grade: Excellent $ 1,957 $ 3,369 $ — $ 252 Good 15,716 34,040 1,593 12,054 Satisfactory 35,194 96,432 39,300 78,402 Monitor 9,666 19,601 11,156 20,369 Special Mention 12,794 11,874 5,065 6,220 Substandard 13,802 5,030 606 441 Total $ 89,129 $ 170,346 $ 57,720 $ 117,738 Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family first liens Real Estate: Mortgage, 1 to 4 family junior liens Real Estate: Mortgage, multi- family June 30, 2016 Grade: Excellent $ 2,429 $ 547 $ — $ 6,466 Good 45,441 15,155 2,492 65,693 Satisfactory 98,720 640,462 109,301 179,886 Monitor 28,893 49,621 3,937 31,001 Special Mention 6,584 17,269 1,846 1,983 Substandard 9,127 20,396 1,712 559 Total $ 191,194 $ 743,450 $ 119,288 $ 285,588 Real Estate: Mortgage, commercial Loans to individuals Obligations of state and political subdivisions Total June 30, 2016 Grade: Excellent $ 15,478 $ — $ 2,326 $ 32,824 Good 87,299 83 36,118 315,684 Satisfactory 186,309 23,753 12,249 1,500,008 Monitor 21,841 226 506 196,817 Special Mention 4,786 213 — 68,634 Substandard 4,112 210 — 55,995 Total $ 319,825 $ 24,485 $ 51,199 $ 2,169,962 Agricultural Commercial and Financial Real Estate: Construction, 1 to 4 family residential Real Estate: Construction, land development and commercial December 31, 2015 Grade: Excellent $ 1,786 $ 3,298 $ — $ 260 Good 15,959 38,764 1,898 11,570 Satisfactory 36,819 102,188 34,357 52,731 Monitor 18,064 27,181 8,684 11,550 Special Mention 25,356 8,231 5,842 6,542 Substandard 3,604 4,537 565 468 Total $ 101,588 $ 184,199 $ 51,346 $ 83,121 Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family first liens Real Estate: Mortgage, 1 to 4 family junior liens Real Estate: Mortgage, multi- family December 31, 2015 Grade: Excellent $ 2,559 $ 426 $ — $ 6,651 Good 31,186 15,773 2,992 64,002 Satisfactory 112,038 620,731 107,091 166,193 Monitor 27,304 55,499 4,198 29,732 Special Mention 11,181 16,237 1,846 4,873 Substandard 3,588 18,494 1,746 523 Total $ 187,856 $ 727,160 $ 117,873 $ 271,974 Real Estate: Mortgage, commercial Loans to individuals Obligations of state and political subdivisions Total December 31, 2015 Grade: Excellent $ 12,484 $ — $ 2,365 $ 29,829 Good 81,305 70 37,045 300,564 Satisfactory 187,728 23,197 12,425 1,455,498 Monitor 32,141 285 518 215,156 Special Mention 6,183 198 — 86,489 Substandard 3,568 269 18 37,380 Total $ 323,409 $ 24,019 $ 52,371 $ 2,124,916 The below are descriptions of the credit quality indicators: Excellent – Excellent rated loans are prime quality loans covered by highly liquid collateral with generous margins or supported by superior current financial conditions reflecting substantial net worth, relative to total credit extended, and based on assets of a stable and non-speculative nature whose values can be readily verified. Identified repayment source or cash flow is abundant and assured. Good – Good rated loans are adequately secured by readily marketable collateral or good financial condition characterized by liquidity, flexibility and sound net worth. Loans are supported by sound primary and secondary payment sources and timely and accurate financial information. Satisfactory – Satisfactory rated loans are loans to borrowers of average financial means not especially vulnerable to changes in economic or other circumstances, where the major support for the extension is sufficient collateral of a marketable nature, and the primary source of repayment is seen to be clear and adequate. Monitor – Monitor rated loans are identified by management as warranting special attention for a variety of reasons that may bear on ultimate collectability. This may be due to adverse trends, a particular industry, loan structure, or repayment that is dependent on projections, or a one-time occurrence. Special Mention – Special mention rated loans are supported by a marginal payment capacity and are marginally protected by collateral. There are identified weaknesses that if not monitored and corrected may adversely affect the Company’s credit position. A special mention credit would typically have a weakness in one of the general categories (cash flow, collateral position or payment history) but not in all categories. Substandard – Substandard loans are not adequately supported by the paying capacity of the borrower and may be inadequately collateralized. These loans have a well-defined weakness or weaknesses. For these loans, it is more probable than not that the Company could sustain some loss if the deficiency(ies) is not corrected. Past due loans as of June 30, 2016 and December 31, 2015 were as follows: 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Current Total Loans Receivable Accruing Loans Past Due 90 Days or More (Amounts In Thousands) June 30, 2016 Agricultural $ 2,041 $ 94 $ 1,446 $ 3,581 $ 85,548 $ 89,129 $ 359 Commercial and financial 755 810 1,154 2,719 167,627 170,346 — Real estate: Construction, 1 to 4 family residential 347 405 173 925 56,795 57,720 — Construction, land development and commercial 45 199 85 329 117,409 117,738 — Mortgage, farmland 338 195 200 733 190,461 191,194 200 Mortgage, 1 to 4 family first liens 228 2,007 1,703 3,938 739,512 743,450 175 Mortgage, 1 to 4 family junior liens 39 8 137 184 119,104 119,288 — Mortgage, multi-family 132 — 40 172 285,416 285,588 — Mortgage, commercial 253 335 173 761 319,064 319,825 — Loans to individuals 79 62 — 141 24,344 24,485 — Obligations of state and political subdivisions — — — — 51,199 51,199 — $ 4,257 $ 4,115 $ 5,111 $ 13,483 $ 2,156,479 $ 2,169,962 $ 734 December 31, 2015 Agricultural $ 3,064 $ 961 $ — $ 4,025 $ 97,563 $ 101,588 $ — Commercial and financial 854 71 1,312 2,237 181,962 184,199 — Real estate: Construction, 1 to 4 family residential — — 214 214 51,132 51,346 — Construction, land development and commercial — — 88 88 $ 83,033 83,121 — Mortgage, farmland 320 88 — 408 187,448 187,856 — Mortgage, 1 to 4 family first liens 4,526 1,192 2,085 7,803 $ 719,357 727,160 406 Mortgage, 1 to 4 family junior liens 250 13 110 373 117,500 117,873 — Mortgage, multi-family 135 — 113 248 $ 271,726 271,974 — Mortgage, commercial 1,033 — 331 1,364 322,045 323,409 61 Loans to individuals 158 40 — 198 $ 23,821 24,019 — Obligations of state and political subdivisions — — — — 52,371 52,371 — $ 10,340 $ 2,365 $ 4,253 $ 16,958 $ 2,107,958 $ 2,124,916 $ 467 The Company does not have a material amount of loans that are past due less than 90 days where there are serious doubts as to the ability of the borrowers to comply with the loan repayment terms. Certain impaired loan information by loan type at June 30, 2016 and December 31, 2015 , was as follows: June 30, 2016 December 31, 2015 Non-accrual loans (1) Accruing loans past due 90 days or more TDR loans Non- accrual loans (1) Accruing loans past due 90 days or more TDR loans (Amounts In Thousands) (Amounts In Thousands) Agricultural $ 1,670 $ 359 $ 96 $ — $ — $ 1,710 Commercial and financial 1,516 — 787 1,498 — 612 Real estate: Construction, 1 to 4 family residential 173 — 266 214 — 473 Construction, land development and commercial 140 — 120 145 — 122 Mortgage, farmland 1,272 200 1,626 — — 2,233 Mortgage, 1 to 4 family first liens 3,914 175 1,342 3,845 406 1,369 Mortgage, 1 to 4 family junior liens 188 — 26 279 — 27 Mortgage, multi-family 358 — — 449 — — Mortgage, commercial 1,089 — 2,596 985 61 1,733 $ 10,320 $ 734 $ 6,859 $ 7,415 $ 467 $ 8,279 (1) There were $5.02 million and $2.31 million of TDR loans included within nonaccrual loans as of June 30, 2016 and December 31, 2015 , respectively. Loans 90 days or more past due that are still accruing interest increased $0.27 million from December 31, 2015 to June 30, 2016 due to an increase in the balances of loans past due greater than 90 days. As of June 30, 2016 there were 6 accruing loans past due 90 days or more. The average accruing loans past due as of June 30, 2016 are $0.12 million . The average accruing loans past due 90 days or more as of December 31, 2015 was $0.09 million . The accruing loans past due 90 days or more balances are believed to be adequately collateralized and the Company expects to collect all principal and interest as contractually due under these loans. The Company may modify the terms of a loan to maximize the collection of amounts due. Such a modification is considered a troubled debt restructuring (“TDR”). In most cases, the modification is either a reduction in interest rate, conversion to interest only payments or an extension of the maturity date. The borrower is experiencing financial difficulties or is expected to experience difficulties in the near-term, so a concessionary modification is granted to the borrower that would otherwise not be considered. TDR loans accrue interest as long as the borrower complies with the revised terms and conditions and has demonstrated repayment performance at a level commensurate with the modified terms over several payment cycles. Below is a summary of information for TDR loans as of June 30, 2016 and December 31, 2015 : June 30, 2016 December 31, 2015 Number of contracts Recorded investment Commitments outstanding Number of contracts Recorded investment Commitments outstanding (Amounts In Thousands) (Amounts In Thousands) Agricultural 4 $ 1,523 $ 65 7 $ 1,710 $ 32 Commercial and financial 12 1,946 252 8 1,818 241 Real estate: Construction, 1 to 4 family residential 2 438 — 3 646 138 Construction, land development and commercial 1 120 — 1 122 — Mortgage, farmland 7 2,897 — 5 2,233 — Mortgage, 1 to 4 family first liens 13 1,539 — 13 1,575 — Mortgage, 1 to 4 family junior liens 2 30 — 2 36 — Mortgage, multi-family — — — 1 71 — Mortgage, commercial 14 3,385 — 10 2,381 — Loans to individuals — — — — — — 55 $ 11,878 $ 317 50 $ 10,592 $ 411 The following is a summary of TDR loans that were modified during the three and six months ended June 30, 2016 : Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Number of contracts Pre-modification recorded investment Post-modification recorded investment Number of contracts Pre-modification recorded investment Post-modification recorded investment (Amounts In Thousands) (Amounts In Thousands) Agricultural 1 $ 562 $ 562 1 $ 562 $ 562 Commercial and financial — — — 4 349 349 Real estate: Construction, 1 to 4 family residential — — — 2 543 543 Construction, land development and commercial — — — — — — Mortgage, farmland — — — 1 132 132 Mortgage, 1 to 4 family first lien — — — — — — Mortgage, 1 to 4 family junior liens — — — — — — Mortgage, multi-family 1 539 539 1 539 539 Mortgage, commercial — — — 3 629 629 2 $ 1,101 $ 1,101 12 $ 2,754 $ 2,754 The Company had commitments to lend $0.32 million in additional borrowings to restructured loan customers as of June 30, 2016 . The Company had commitments to lend $0.41 million in additional borrowings to restructured loan customers as of December 31, 2015 . These commitments were in the normal course of business. The additional borrowings were not used to facilitate payments on these loans. There were $0.20 million and $0.00 million of TDR loans that were in payment default (defined as past due 90 days or more) during the quarter ended June 30, 2016 and year ended December 31, 2015 . Information regarding impaired loans as of and for the three and six months ended June 30, 2016 is as follows: June 30, 2016 Three Months Ended Six Months Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: (Amounts In Thousands) Agricultural $ 50 $ 195 $ — $ 91 $ 1 $ 97 $ 1 Commercial and financial 1,693 2,325 — 1,722 6 1,743 12 Real estate: Construction, 1 to 4 family residential 265 265 — 265 3 265 6 Construction, land development and commercial 205 292 — 205 1 208 3 Mortgage, farmland 1,089 1,206 — 1,090 13 1,095 26 Mortgage, 1 to 4 family first liens 4,029 4,983 — 4,075 13 4,136 27 Mortgage, 1 to 4 family junior liens 141 444 — 146 — 153 — Mortgage, multi-family 146 258 — 149 — 187 — Mortgage, commercial 2,823 4,176 — 2,853 25 2,893 50 Loans to individuals — 20 — — — — — $ 10,441 $ 14,164 $ — $ 10,596 $ 62 $ 10,777 $ 125 With an allowance recorded: Agricultural $ 12,527 $ 12,564 $ 837 $ 12,560 $ 140 $ 12,598 $ 282 Commercial and financial 610 623 217 643 5 696 11 Real estate: Construction, 1 to 4 family residential 173 184 2 173 — 173 — Construction, land development and commercial 55 57 11 55 — 56 — Mortgage, farmland 7,425 7,430 638 7,498 82 7,505 164 Mortgage, 1 to 4 family first liens 1,402 1,537 232 1,423 5 1,434 9 Mortgage, 1 to 4 family junior liens 74 232 14 76 — 78 1 Mortgage, multi-family 212 220 41 214 — 216 — Mortgage, commercial 862 896 34 868 9 875 17 Loans to individuals 70 70 70 69 2 83 4 $ 23,410 $ 23,813 $ 2,096 $ 23,579 $ 243 $ 23,714 $ 488 Total: Agricultural $ 12,577 $ 12,759 $ 837 $ 12,651 $ 141 $ 12,695 $ 283 Commercial and financial 2,303 2,948 217 2,365 11 2,439 23 Real estate: Construction, 1 to 4 family residential 438 449 2 438 3 438 6 Construction, land development and commercial 260 349 11 260 1 264 3 Mortgage, farmland 8,514 8,636 638 8,588 95 8,600 190 Mortgage, 1 to 4 family first liens 5,431 6,520 232 5,498 18 5,570 36 Mortgage, 1 to 4 family junior liens 215 676 14 222 — 231 1 Mortgage, multi-family 358 478 41 363 — 403 — Mortgage, commercial 3,685 5,072 34 3,721 34 3,768 67 Loans to individuals 70 90 70 69 2 83 4 $ 33,851 $ 37,977 $ 2,096 $ 34,175 $ 305 $ 34,491 $ 613 Information regarding impaired loans as of December 31, 2015 is as follows: Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: (Amounts In Thousands) Agricultural $ 1,609 $ 1,773 $ — Commercial and financial 1,263 1,981 — Real estate: Construction, 1 to 4 family residential 238 238 — Construction, land development and commercial 210 314 — Mortgage, farmland 2,233 2,351 — Mortgage, 1 to 4 family first liens 3,558 4,419 — Mortgage, 1 to 4 family junior liens 189 500 — Mortgage, multi-family 157 226 — Mortgage, commercial 1,831 3,018 — Loans to individuals — 20 — $ 11,288 $ 14,840 $ — With an allowance recorded: Agricultural $ 101 $ 101 $ 1 Commercial and financial 847 847 324 Real estate: Construction, 1 to 4 family residential 449 461 9 Construction, land development and commercial 57 58 13 Mortgage, farmland — — — Mortgage, 1 to 4 family first liens 2,062 2,156 306 Mortgage, 1 to 4 family junior liens 117 270 20 Mortgage, multi-family 292 332 58 Mortgage, commercial 948 1,030 52 Loans to individuals 100 100 100 $ 4,973 $ 5,355 $ 883 Total: Agricultural $ 1,710 $ 1,874 $ 1 Commercial and financial 2,110 2,828 324 Real estate: Construction, 1 to 4 family residential 687 699 9 Construction, land development and commercial 267 372 13 Mortgage, farmland 2,233 2,351 — Mortgage, 1 to 4 family first liens 5,620 6,575 306 Mortgage, 1 to 4 family junior liens 306 770 20 Mortgage, multi-family 449 558 58 Mortgage, commercial 2,779 4,048 52 Loans to individuals 100 120 100 $ 16,261 $ 20,195 $ 883 Impaired loans increased $17.59 million from December 31, 2015 to June 30, 2016 . Impaired loans include any loan that has been placed on nonaccrual status, accruing loans past due 90 days or more and TDR loans. Impaired loans also include loans that, based on management’s evaluation of current information and events, the Company expects to be unable to collect in full according to the contractual terms of the original loan agreement. Impaired loans were 1.56% of loans held for investment as of June 30, 2016 and 0.76% as of December 31, 2015 . The increase in impaired loans is due mainly to an increase in nonaccrual loans of $2.91 million , a $16.39 million agricultural and farmland real estate relationship with a specific allowance for losses, and a decrease in TDR loans of $1.42 million from December 31, 2015 to June 30, 2016 . The Company regularly reviews a substantial portion of the loans in the portfolio and assesses whether the loans are impaired in accordance with ASC 310. If the loans are impaired, the Company determines if a specific allowance is appropriate. In addition, the Company's management also reviews and, where determined necessary, provides allowances for particular loans based upon (1) reviews of specific borrowers and (2) management’s assessment of areas that management considers are of higher credit risk, including loans that have been restructured. Loans that are determined not to be impaired and for which there are no specific allowances are classified into one or more risk categories. Based upon the risk category assigned, the Company allocates a percentage, as determined by management, for a required allowance needed. The determination of the appropriate percentage begins with historical loss experience factors, which are then adjusted for levels and trends in past due loans, levels and trends in charged-off and recovered loans, trends in volume growth, trends in problem and watch loans, trends in restructured loans, local economic trends and conditions, industry and other conditions, and effects of changing interest rates. Specific allowances for losses on impaired loans are established if the loan balances exceed the net present value of the relevant future cash flows or the fair value of the relevant collateral based on updated appraisals and/or updated collateral analysis for the properties if the loan is collateral dependent. The Company may recognize a charge off or record a specific allowance related to an impaired loan if there is a collateral shortfall or it is unlikely the borrower can make all principal and interest payments as contractually due. For loans that are collateral dependent, losses are evaluated based on the portion of a loan that exceeds the fair market value of the collateral. In general, this is the amount that the carrying value of the loan exceeds the related appraised value less estimated costs to sell the collateral. Generally, it is the Company’s policy not to rely on appraisals that are older than one year prior to the date the impairment is being measured. The most recent appraisal values may be adjusted if, in the Company’s judgment, experience and other market data indicate that the property’s value, use, condition, exit market or other variable affecting its value may have changed since the appraisal was performed, consistent with the December 2006 joint interagency guidance on the allowance for loan losses. The charge off or loss adjustment supported by an appraisal is considered the minimum charge off. Any adjustments made to the appraised value are to provide an additional charge off or specific reserve based on the applicable facts and circumstances. In instances where there is an estimated decline in value, a specific reserve may be provided or a charge off taken pending confirmation of the amount of the loss from an updated appraisal. Upon receipt of the new appraisals, an additional specific reserve may be provided or charge off taken based on the appraised value of the collateral. On average, appraisals are obtained within one month of order.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The carrying value and estimated fair values of the Company's financial instruments as of June 30, 2016 are as follows: June 30, 2016 Carrying Amount Estimated Fair Value Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) (Amounts In Thousands) Financial instrument assets: Cash and cash equivalents $ 36,614 $ 36,614 $ 36,614 $ — $ — Investment securities 260,621 260,621 — 260,621 — Loans held for sale 7,239 7,239 — 7,239 — Loans Agricultural 86,132 86,173 — — 86,173 Commercial and financial 166,335 166,286 — — 166,286 Real estate: Construction, 1 to 4 family residential 56,738 56,707 — — 56,707 Construction, land development and commercial 115,822 115,847 — — 115,847 Mortgage, farmland 187,267 187,578 — — 187,578 Mortgage, 1 to 4 family first liens 737,242 741,638 — — 741,638 Mortgage, 1 to 4 family junior liens 118,063 122,980 — — 122,980 Mortgage, multi-family 283,830 283,577 — — 283,577 Mortgage, commercial 317,382 316,736 — — 316,736 Loans to individuals 23,839 23,820 — — 23,820 Obligations of state and political subdivisions 50,815 50,353 — — 50,353 Accrued interest receivable 9,601 9,601 — 9,601 — Total financial instrument assets $ 2,457,540 $ 2,465,770 $ 36,614 $ 277,461 $ 2,151,695 Financial instrument liabilities Deposits Noninterest-bearing deposits $ 304,155 $ 304,155 $ — $ 304,155 $ — Interest-bearing deposits 1,591,853 1,593,284 — 1,593,284 — Other borrowings 45,132 45,132 — 45,132 — Federal Home Loan Bank borrowings 240,000 239,859 — 239,859 — Interest rate swaps 6,611 6,611 — 6,611 — Accrued interest payable 844 844 — 844 — Total financial instrument liabilities $ 2,188,595 $ 2,189,885 $ — $ 2,189,885 $ — Face Amount Financial instrument with off-balance sheet risk: Loan commitments $ 420,305 $ — $ — $ — $ — Letters of credit 9,935 — — — — Total financial instrument liabilities with off-balance-sheet risk $ 430,240 $ — $ — $ — $ — (1) Considered Level 1 under Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures (“ASC 820”). (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. The carrying value and estimated fair values of the Company's financial instruments as of December 31, 2015 are as follows: December 31, 2015 Carrying Amount Estimated Fair Value Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) (Amounts In Thousands) Financial instrument assets: Cash and cash equivalents $ 35,427 $ 35,427 $ 35,427 $ — $ — Investment securities 276,069 276,069 — 276,069 — Loans held for sale 5,554 5,554 — 5,554 — Loans Agricultural 98,506 98,530 — — 98,530 Commercial and financial 179,682 179,649 — — 179,649 Real estate: Construction, 1 to 4 family residential 50,480 50,487 — — 50,487 Construction, land development and commercial 81,707 81,705 — — 81,705 Mortgage, farmland 184,514 184,640 — — 184,640 Mortgage, 1 to 4 family first liens 720,229 718,566 — — 718,566 Mortgage, 1 to 4 family junior liens 116,632 122,173 — — 122,173 Mortgage, multi-family 270,261 272,446 — — 272,446 Mortgage, commercial 320,899 319,090 — — 319,090 Loans to individuals 23,518 23,509 — — 23,509 Obligations of state and political subdivisions 51,978 51,073 — — 51,073 Accrued interest receivable 8,672 8,672 — 8,672 — Total financial instrument assets $ 2,424,128 $ 2,427,590 $ 35,427 $ 290,295 $ 2,101,868 Financial instrument liabilities: Deposits Noninterest-bearing deposits $ 314,968 $ 314,968 $ — $ 314,968 $ — Interest-bearing deposits 1,575,734 1,577,684 — 1,577,684 — Other borrowings 44,051 44,051 — 44,051 — Federal Home Loan Bank borrowings 225,000 226,157 — 226,157 — Interest rate swaps 4,180 4,180 4,180 Accrued interest payable 846 846 — 846 — Total financial instrument liabilities $ 2,164,779 $ 2,167,886 $ — $ 2,167,886 $ — Face Amount Financial instrument with off-balance sheet risk: Loan commitments $ 344,602 $ — $ — $ — $ — Letters of credit 11,718 — — — — Total financial instrument liabilities with off-balance-sheet risk $ 356,320 $ — $ — $ — $ — (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. Fair value of financial instruments : FASB ASC 820, Fair Value Measurements and Disclosures (“ASC 820”) provides a single definition for fair value, a framework for measuring fair value and expanded disclosures concerning fair value. Fair value is defined under ASC 820 as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company determines the fair market value of its financial instruments based on the fair value hierarchy established in ASC 820. There are three levels of inputs that may be used to measure fair value as follows: Level 1 Quoted prices in active markets for identical assets or liabilities. Level 2 Observable inputs other than quoted prices included within Level 1. Observable inputs include the quoted prices for similar assets or liabilities in markets that are not active and inputs other than quoted prices that are observable for the asset or liability. Level 3 Unobservable inputs supported by little or no market activity for financial instruments. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. It is the Company’s policy to maximize the use of observable inputs and minimize the use of unobservable inputs when developing fair value measurements. The Company is required to use observable inputs, to the extent available, in the fair value estimation process unless that data results from forced liquidations or distressed sales. The following is a description of valuation methodologies used for assets and liabilities recorded at fair value and for estimating fair value for assets or liabilities not recorded at fair value. ASSETS Cash and cash equivalents : The carrying amounts reported in the consolidated balance sheets for cash and short-term instruments approximate their fair values (Level 1). Investment securities available for sale : Investment securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If a quoted price is not available, the fair value is obtained from benchmarking the security against similar securities. All of the Company’s securities are considered Level 2. The pricing for investment securities is obtained from an independent source. There are no level 1 or level 3 investment securities owned by the Company. The Company obtains an understanding of the independent source’s valuation methodologies used to determine fair value by level of security. The Company validates assigned fair values on a sample basis using an additional third-party provider pricing service to determine if the fair value measurement is reasonable. Due to the nature of our investment portfolio, we do not expect significant and unusual fluctuations as fair value changes primarily relate to interest rate changes. No unusual fluctuations were identified during the six months ended June 30, 2016 . If a fluctuation requiring investigation was identified, the Company would research the change with the independent source or other available information. Loans held for sale : Loans held for sale are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the short time between origination of the loan and its sale on the secondary market (Level 2). The market is active for these loans and as a result prices for similar assets are available. Loans : The Company does not record loans at fair value on a recurring basis. For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values (Level 3). The fair values for other loans are determined using estimated future cash flows, discounted at the interest rates currently being offered for loans with similar terms to borrowers with similar credit quality utilizing an entrance price concept (Level 3). The Company does record nonrecurring fair value adjustments to loans to reflect (1) partial write-downs that are based on the observable market price or appraised value of the collateral or (2) the full charge-off of the loan carrying value (Level 3). These loans are considered Level 3 as the instruments used to determine fair market value require significant management judgment and estimation. Foreclosed assets : The Company does not record foreclosed assets at fair value on a recurring basis. Foreclosed assets consist mainly of other real estate owned but may include other types of assets repossessed by the Company. Foreclosed assets are adjusted to the lower of carrying value or fair value less the cost of disposal. Fair value is generally based upon independent market prices or appraised values of the collateral, and may include a marketability discount as deemed necessary by management based on its experience with similar types of real estate. The value of foreclosed assets is evaluated periodically as a nonrecurring fair value adjustment. Foreclosed assets are classified as Level 3. Off-balance sheet instruments : Fair values for outstanding letters of credit are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of the outstanding letters of credit is not significant. Unfunded loan commitments are not valued since the loans are generally priced at market at the time of funding (Level 2). Accrued interest receivable : The fair value of accrued interest receivable equals the amount receivable due to the current nature of the amounts receivable (Level 2). Non-marketable equity investments : Non-marketable equity investments are recorded under the cost or equity method of accounting. There are generally restrictions on the sale and/or liquidation of these investments, including stock of the Federal Home Loan Bank. The carrying value of stock of the Federal Home Loan Bank approximates fair value (Level 2). LIABILITIES Deposit liabilities : Deposit liabilities are carried at historical cost. The fair value of demand deposits, savings accounts and certain money market account deposits is the amount payable on demand at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for deposits of similar remaining maturities. If the fair value of the fixed maturity certificates of deposit is calculated at less than the carrying amount, the carrying value of these deposits is reported as the fair value (Level 2). Deposit liabilities are classified as Level 2 due to available prices for similar liabilities in the market. Other borrowings : Other borrowings are carried at historical cost and include federal funds purchased and securities sold under agreements to repurchase. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the liability and its expected realization (Level 2). Other borrowings are classified as Level 2 due to available prices for similar liabilities in the market. Federal Home Loan Bank borrowings : Federal Home Loan Bank borrowings are recorded at historical cost. The fair values of the Company’s Federal Home Loan Bank borrowings are estimated using discounted cash flow analysis, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements (Level 2). Federal Home Loan Bank borrowings are classified as Level 2 due to available prices for similar liabilities in the market. Interest Rate Swap Agreements : The fair value is estimated using forward-looking interest rate curves and is calculated using discounted cash flows that are observable or that can be corroborated by observable market data (Level 2). Accrued interest payable : The fair value of accrued interest payable equals the amount payable due to the current nature of the amounts payable (Level 2). Assets and Liabilities Recorded at Fair Value on a Recurring Basis The table below represents the balances of assets and liabilities measured at fair value on a recurring basis: June 30, 2016 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Securities available for sale (Amounts In Thousands) U.S. Treasury $ — $ 25,342 $ — $ 25,342 State and political subdivisions — 63,315 — 63,315 Other securities (FHLB, FHLMC and FNMA) — 159,341 — 159,341 Derivative Financial Instruments Interest rate swaps $ — (6,611 ) $ — (6,611 ) Total $ — $ 241,387 $ — $ 241,387 December 31, 2015 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Securities available for sale (Amounts In Thousands) U.S. Treasury $ — $ 24,978 $ — $ 24,978 State and political subdivisions — 173,929 — 173,929 Other securities (FHLB, FHLMC and FNMA) — 65,328 — 65,328 Derivative Financial Instruments Interest rate swaps — (4,180 ) — (4,180 ) Total $ — $ 260,055 $ — $ 260,055 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. There were no transfers between Levels 1, 2 or 3 during the six months ended June 30, 2016 and the year ended December 31, 2015 . Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis The Company is required to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets. The valuation methodologies used to measure these fair value adjustments are described above. The following tables present the Company’s assets that are measured at fair value on a nonrecurring basis. June 30, 2016 Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Total Losses Total Losses (Amounts in Thousands) Loans (4) Agricultural $ — $ — $ 1,345 $ 1,345 $ — $ — Commercial and financial — — 1,480 1,480 72 92 Real Estate: Construction, 1 to 4 family residential — — 436 436 — — Construction, land development and commercial — — 129 129 — — Mortgage, farmland — — 1,972 1,972 — — Mortgage, 1 to 4 family first liens — — 4,609 4,609 79 354 Mortgage, 1 to 4 family junior liens — — 201 201 — — Mortgage, multi-family — — 317 317 — — Mortgage, commercial — — 1,764 1,764 65 Loans to individuals — — — — — — Foreclosed assets (5) — — — — — — Total $ — $ — $ 12,253 $ 12,253 $ 151 $ 511 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. (4) Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero. (5) Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets. Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis (continued) December 31, 2015 Year Ended December 31, 2015 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Total Losses (Amounts in Thousands) Loans (4) Agricultural $ — $ — $ 1,470 $ 1,470 $ 116 Commercial and financial — — 1,178 1,178 56 Real Estate: Construction, 1 to 4 family residential — — 482 482 161 Construction, land development and commercial — — 132 132 35 Mortgage, farmland — — 2,233 2,233 — Mortgage, 1 to 4 family first liens — — 4,487 4,487 529 Mortgage, 1 to 4 family junior liens — — 286 286 166 Mortgage, multi-family — — 391 391 38 Mortgage, commercial — — 1,152 1,152 140 Loans to individuals — — — — — Foreclosed assets (5) — — 100 100 69 Total $ — $ — $ 11,911 $ 11,911 $ 1,310 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. (4) Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero. (5) Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets.

Stock Repurchase Program

Stock Repurchase Program	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Stock Repurchase Program	Stock Repurchase Program On July 26, 2005, the Company’s Board of Directors authorized a program to repurchase up to a total of 1,500,000 shares of the Company’s common stock (the “2005 Stock Repurchase Program”). The Company’s Board of Directors has authorized the 2005 Stock Repurchase Program through December 31, 2017. The Company expects the purchases pursuant to the 2005 Stock Repurchase Program to be made from time to time in private transactions at a price equal to the most recent quarterly independent appraisal of the shares of the Company’s common stock and with the Board reviewing the overall results of the 2005 Stock Repurchase Program on a quarterly basis. All purchases made pursuant to the 2005 Stock Repurchase Program since its inception have been made on that basis. The amount and timing of stock repurchases will be based on various factors, such as the Board’s assessment of the Company’s capital structure and liquidity, the amount of interest shown by shareholders in selling shares of stock to the Company at their appraised value, and applicable regulatory, legal and accounting factors. The Company has purchased 926,268 shares of its common stock in privately negotiated transactions from August 1, 2005 through June 30, 2016 . Of these 926,268 shares, 13,427 shares were purchased during the quarter ended June 30, 2016 , at an average price per share of $45.42 .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Concentrations of credit risk : The Bank’s loans, commitments to extend credit, unused lines of credit and outstanding letters of credit have been granted to customers within the Bank's market area. Investments in securities issued by state and political subdivisions within the state of Iowa totaled approximately $76.48 million . The concentrations of credit by type of loan are set forth in Note 5 to the Consolidated Financial Statements. Outstanding letters of credit were granted primarily to commercial borrowers. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors' ability to honor their contracts is dependent upon the economic conditions in Johnson, Linn and Washington Counties, Iowa. Contingencies : In the normal course of business, the Company and Bank are involved in various legal proceedings. While the ultimate outcome of such legal proceedings cannot be predicted with certainty, after reviewing pending and threatened litigation with counsel, management believes at this time that the outcome of such litigation will not have a material adverse effect on the Company's business, financial condition or results of operations. Financial instruments with off-balance sheet risk : The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, credit card participations and standby letters of credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit, credit card participations and standby letters of credit is represented by the contractual amount of those instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. A summary of the Bank’s commitments at June 30, 2016 and December 31, 2015 is as follows: June 30, 2016 December 31, 2015 (Amounts In Thousands) Firm loan commitments and unused portion of lines of credit: Home equity loans $ 47,329 $ 44,376 Credit cards 43,999 41,518 Commercial, real estate and home construction 130,282 98,613 Commercial lines and real estate purchase loans 198,695 160,095 Outstanding letters of credit 9,935 11,718

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Federal income tax expense for the six months ended June 30, 2016 and 2015 was computed using the consolidated effective federal tax rate. The Company also recognized income tax expense pertaining to state franchise taxes payable individually by the subsidiary bank. The Company files a consolidated tax return for federal purposes and separate tax returns for State of Iowa purposes. The tax years ended December 31, 2015 , 2014 , and 2013 remain subject to examination by the Internal Revenue Service. For state tax purposes, the tax years ended December 31, 2015 , 2014 , and 2013 remain open for examination. There were no material unrecognized tax benefits at June 30, 2016 and December 31, 2015 and therefore no interest or penalties on unrecognized tax benefits has been recorded. As of June 30, 2016 , the Company does not anticipate any significant increase in unrecognized tax benefits during the twelve-month period ending March 31, 2016 . Income taxes as a percentage of income before taxes were 30.80% for the six months ended June 30, 2016 and 30.23% for the same period in 2015 . The slight increase in the effective tax rate is due to a decrease in the amount of low-income housing tax credits earned by the Company in 2016 .

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments In the normal course of business, the Bank may use derivative financial instruments to manage its interest rate risk. These instruments carry varying degrees of credit, interest rate and market or liquidity risks. Derivative instruments are recognized as either assets or liabilities in the accompanying financial statement and are measured at fair value. The Bank’s objectives are to add stability to its net interest margin and to manage its exposure to movements in interest rates. The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amount to be exchanged between the counterparties. The Bank is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. The Bank minimizes this risk by entering into derivative contracts with large, stable financial institutions. The Bank has not experienced any losses from nonperformance by counterparties. The Bank monitors counterparty risk in accordance with the provisions of ASC 815. In addition, the Bank’s interest rate-related derivative instruments contain language outlining collateral pledging requirements for each counterparty. Collateral must be posted when the market value exceeds certain threshold limits which are determined by credit ratings of each counterparty. The Bank was required to pledge $6.61 million of collateral as of June 30, 2016 . Cash Flow Hedges: The Bank executed two forward-starting interest rate swap transactions on November 7, 2013. One of the interest rate swap transactions had an effective date of November 9, 2015, and an expiration date of November 9, 2020, effectively converting $25.00 million of variable rate debt to fixed rate debt. The other interest rate swap transaction has an effective date of November 7, 2016 and an expiration date of November 7, 2023, also to effectively convert $25.00 million of variable rate debt to fixed rate debt. For accounting purposes, these swap transactions are designated as a cash flow hedge of the changes in cash flows attributable to changes in three-month LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on an amount of the Bank’s debt principal equal to the then-outstanding swap notional amount. At inception, the Bank asserted that the underlying principal balance would remain outstanding throughout the hedge transaction making it probable that sufficient LIBOR-based interest payments would exist through the maturity date of the swaps. The table below identifies the balance sheet category and fair values of the Bank’s derivative instruments designated as cash flow hedges as of June 30, 2016 and December 31, 2015 : Notional Amount Fair Value Balance Sheet Category Maturity (Amounts in Thousands) June 30, 2016 Interest rate swap $ 25,000 $ (2,194 ) Other Liabilities 11/9/2020 Interest rate swap 25,000 (4,417 ) Other Liabilities 11/7/2023 December 31, 2015 Interest rate swap $ 25,000 $ (1,501 ) Other Liabilities 11/9/2020 Interest rate swap 25,000 (2,679 ) Other Liabilities 11/7/2023 The table below identifies the gains and losses recognized on the Bank’s derivative instruments designated as cash flow hedges as of June 30, 2016 and December 31, 2015 : Effective Portion Ineffective Portion Recognized in OCI Reclassifed from AOCI into Income Recognized in Income on Derivatives Amount of Gain (Loss) Category Amount of Gain (Loss) Category Amount of Gain (Loss) (Amounts in Thousands) June 30, 2016 Interest rate swap $ (428 ) Interest Expense $ — Other Income $ — Interest rate swap (1,073 ) Interest Expense — Other Income — December 31, 2015 Interest rate swap $ (394 ) Interest Expense $ — Other Income $ — Interest rate swap (461 ) Interest Expense — Other Income —

Summary of Significant Accoun19

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial reporting and with instructions for Form 10-Q and Regulation S-X. These financial statements include all adjustments (consisting of normal recurring accruals) which in the opinion of management are considered necessary for the fair presentation of the financial position and results of operations for the periods shown. Certain prior year amounts have been reclassified to conform to the current year presentation. The Company considers that it operates as one business segment, a commercial bank. Operating results for the six month period ended June 30, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2016. For further information, refer to the consolidated financial statements and footnotes thereto included in the Form 10-K Annual Report of Hills Bancorporation and subsidiary (the “Company”) for the year ended December 31, 2015 filed with the Securities Exchange Commission on March 9, 2016 . The consolidated balance sheet as of December 31, 2015 , has been derived from the audited consolidated financial statements for that period. The Company evaluated subsequent events through the filing date of its quarterly report on Form 10-Q with the SEC.
Effect of New Financial Accounting Standards	In May 2014, the FASB and International Accounting Standards Board (IASB) issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of ASU 2014-09 is that a company should recognize revenue to depict the transfer of promised good or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. For financial institutions, significant changes are not expected given that most financial instruments are not in the scope of the accounting standard update. ASU 2014-09 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. In August 2015, FASB issued ASU 2015-14 deferring the effective date for annual periods and interim periods within those annual periods after December 15, 2017. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The adoption of ASU 2014-09 by the Company is not expected to have a material impact. In February 2015, the FASB issued ASU No. 2015-02 (Topic 810), Consolidation . The ASU modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIE) or voting interest entities (VOE). The standard relaxes existing criteria for determining when fees paid to a decision maker or service provider do not represent a variable interest by focusing on whether those fees are "at market". The ASU eliminates both the consolidation model specific to limited partnerships and the current presumption that a general partner controls a limited partnership. For public companies, ASU 2015-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Company adopted the accounting standard for the period ending March 31, 2016 and have changed the accounting for its tax credit limited partnership investments to the equity method. The impact of the change was determined to not be material. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30), Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this update. For public companies, ASU 2015-03 is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted ASU 2015-03 for the period ending March 31, 2016. There was no material impact on the financial statements. In April 2015, the FASB issued ASU No. 2015-05, Intangibles – Goodwill and Other Internal-Use Software (Subtopic 350-40), Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 provides guidance to customers about whether a cloud computing arrangement includes a software license. If it does, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. The adoption of ASU 2015-05 by the Company did not have a material impact. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 created Subtopic 321-10, Investments-Equity Securities which is applicable to all entities except those in industries that account for substantially all investments at fair value through earnings or the change in net assets. Under this new subtopic, equity securities are generally required to be measured at fair value with unrealized holding gains and losses reflected in net income. ASU 2016-01 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The adoption of ASU 2016-01 by the Company is not expected to have a material impact. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842), Leases . The ASU provides guidance requiring lessees to recognize right-of-use assets and lease liabilities for all leases other than those that meet the definition of short-term leases. For short-term leases, lessees may elect an accounting policy by class of underlying asset under which these assets and liabilities are not recognized and lease payments are generally recognized over the lease term on a straight-line basis. Under this new ASU, lessees will recognize right-of use assets and lease liabilities for most leases currently accounted for as operating leases under generally accepted accounting principles. For public companies, ASU 2016-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The adoption of ASU 2016-02 by the Company is not expected to have a material impact. In March 2016, the FASB issued ASU No. 2016-04, Liabilities - Extinguishments of Liabilities (Subtopic 405-20), Recognition of Breakage for Certain Prepaid Stored-Value Products . ASU 2016-04 applies to all entities that offer certain prepaid stored - value products. The ASU provides guidance for the derecognition of financial liabilities related to the issuance of these products and aligns the recognition of breakage to current authoritative guidance. For public companies, ASU 2016-04 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The adoption of ASU 2016-04 by the Company is not expected to have a material impact. In March 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting . The ASU simplifies several aspects of the accounting for share-based payment transaction, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public companies, ASU 2016-09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The adoption of ASU 2016-09 by the Company is not expected to have a material impact. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The ASU changes the way entities recognize impairment of financial assets by requiring immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets. For public companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently reviewing the provisions of this standard to determine the impact on the Company's financial statements.
Earnings Per Share	Basic earnings per share is computed using the weighted average number of actual common shares outstanding during the period. Diluted earnings per share reflects the potential dilution that would occur from the exercise of common stock options outstanding. ESOP shares are considered outstanding for this calculation unless unearned.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	The computation of basic and diluted earnings per share for the periods presented is as follows: Three Months Ended June 30, Six Months Ended 2016 2015 2016 2015 Common shares outstanding at the beginning of the period 9,289,662 9,362,061 9,322,054 9,365,176 Weighted average number of net shares redeemed (3,339 ) (7,153 ) (24,752 ) (6,075 ) Weighted average shares outstanding (basic) 9,286,323 9,354,908 9,297,302 9,359,101 Weighted average of potential dilutive shares attributable to stock options granted, computed under the treasury stock method 6,481 5,448 6,259 5,159 Weighted average number of shares (diluted) 9,292,804 9,360,356 9,303,561 9,364,260 Net income (In thousands) $ 7,967 $ 7,470 $ 15,667 $ 14,850 Earnings per share: Basic $ 0.86 $ 0.80 $ 1.69 $ 1.59 Diluted $ 0.85 $ 0.80 $ 1.68 $ 1.59

Other Comprehensive Income (L21

Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Components of accumulated other comprehensive income (AOCI)	The following table summarizes the balances of each component of accumulated other comprehensive income (AOCI), included in stockholders’ equity, at June 30, 2016 and December 31, 2015 : June 30, December 31, 2015 (amounts in thousands) Net unrealized gain on available-for-sale securities $ 4,438 $ 2,244 Net unrealized loss on derivatives used for cash flow hedges (6,611 ) (4,180 ) Tax effect $ 831 $ 741 Net-of-tax amount $ (1,342 ) $ (1,195 )

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Carrying values of investment securities	The carrying values of investment securities at June 30, 2016 and December 31, 2015 are summarized in the following table (dollars in thousands): June 30, 2016 December 31, 2015 Amount Percent Amount Percent Securities available for sale U.S. Treasury $ 25,342 10.22 % $ 24,978 9.45 % Other securities (FHLB, FHLMC and FNMA) 63,315 25.53 65,328 24.72 State and political subdivisions 159,341 64.25 173,929 65.83 Total securities available for sale $ 247,998 100.00 % $ 264,235 100.00 %
Carrying amount of available-for-sale securities and approximate fair values	The carrying amount of available-for-sale securities and their approximate fair values were as follows as of June 30, 2016 and December 31, 2015 (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Estimated Fair Value June 30, 2016: U.S. Treasury $ 24,917 $ 425 $ — $ 25,342 Other securities (FHLB, FHLMC and FNMA) 62,748 568 (1 ) 63,315 State and political subdivisions 155,895 3,469 (23 ) 159,341 Total $ 243,560 $ 4,462 $ (24 ) $ 247,998 December 31, 2015: U.S. Treasury $ 24,893 $ 92 $ (7 ) $ 24,978 Other securities (FHLB, FHLMC and FNMA) 65,400 81 (153 ) 65,328 State and political subdivisions 171,698 2,375 (144 ) 173,929 Total $ 261,991 $ 2,548 $ (304 ) $ 264,235
Available-for-sale securities classified as per contractual maturities	The amortized cost and estimated fair value of available-for-sale securities classified according to their contractual maturities at June 30, 2016 , were as follows (in thousands): Amortized Cost Fair Value Due in one year or less $ 35,094 $ 35,245 Due after one year through five years 144,645 147,041 Due after five years through ten years 62,485 64,374 Due over ten years 1,336 1,338 Total $ 243,560 $ 247,998
Available-for-sale securities, continuous unrealized loss position, fair value	The following table shows the fair value, gross unrealized losses and the percentage of fair value represented by gross unrealized losses of applicable investment securities owned by the Company, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2016 and December 31, 2015 (in thousands): Less than 12 months 12 months or more Total June 30, 2016 # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % U.S. Treasury — $ — $ — — % — $ — $ — — % — $ — $ — — % Other securities (FHLB, FHLMC and FNMA) 1 1,802 (1 ) 0.06 — — — — 1 1,802 (1 ) 0.06 State and political subdivisions 11 2,735 (6 ) 0.22 15 2,558 (17 ) 0.66 26 5,293 (23 ) 0.43 Total temporarily impaired securities 12 $ 4,537 $ (7 ) 0.15 % 15 $ 2,558 $ (17 ) 0.66 % 27 $ 7,095 $ (24 ) 0.34 % Less than 12 months 12 months or more Total December 31, 2015 # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % # Fair Value Unrealized Loss % U.S. Treasury 3 $ 7,455 $ (7 ) 0.09 % — $ — $ — — % 3 $ 7,455 $ (7 ) 0.09 % Other securities (FHLB, FHLMC and FNMA) 15 36,830 (153 ) 0.42 — — — — 15 36,830 (153 ) 0.42 State and political subdivisions 56 13,557 (70 ) 0.52 27 5,633 (74 ) 1.31 83 19,190 (144 ) 0.75 Total temporarily impaired securities 74 $ 57,842 $ (230 ) 0.40 % 27 $ 5,633 $ (74 ) 1.31 % 101 $ 63,475 $ (304 ) 0.48 %

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Schedule of classes of loans	Classes of loans are as follows: June 30, December 31, (Amounts In Thousands) Agricultural $ 89,129 $ 101,588 Commercial and financial 170,346 184,199 Real estate: Construction, 1 to 4 family residential 57,720 51,346 Construction, land development and commercial 117,738 83,121 Mortgage, farmland 191,194 187,856 Mortgage, 1 to 4 family first liens 743,450 727,160 Mortgage, 1 to 4 family junior liens 119,288 117,873 Mortgage, multi-family 285,588 271,974 Mortgage, commercial 319,825 323,409 Loans to individuals 24,485 24,019 Obligations of state and political subdivisions 51,199 52,371 $ 2,169,962 $ 2,124,916 Net unamortized fees and costs 793 768 $ 2,170,755 $ 2,125,684 Less allowance for loan losses 27,290 26,510 $ 2,143,465 $ 2,099,174
Schedule of changes in allowance for loan losses	Changes in the allowance for loan losses, the allowance for loan losses applicable to impaired loans and the related loan balance of impaired loans for the three and six months ended June 30, 2016 were as follows: Three Months Ended June 30, 2016 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,954 $ 4,311 $ 2,759 $ 3,944 $ 8,036 $ 4,190 $ 936 $ 27,130 Charge-offs (25 ) (79 ) — — (184 ) — (108 ) (396 ) Recoveries 30 367 555 — 279 8 38 1,277 Provision 38 (588 ) (416 ) (17 ) 95 3 164 (721 ) Ending balance $ 2,997 $ 4,011 $ 2,898 $ 3,927 $ 8,226 $ 4,201 $ 1,030 $ 27,290 Six Months Ended June 30, 2016 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 3,082 $ 4,517 $ 2,280 $ 3,342 $ 8,172 $ 4,223 $ 894 $ 26,510 Charge-offs (25 ) (134 ) — (10 ) (528 ) (66 ) (277 ) (1,040 ) Recoveries 172 620 607 — 492 19 82 1,992 Provision (232 ) (992 ) 11 595 90 25 331 (172 ) Ending balance $ 2,997 $ 4,011 $ 2,898 $ 3,927 $ 8,226 $ 4,201 $ 1,030 $ 27,290 Ending balance, individually evaluated for impairment $ 837 $ 217 $ 13 $ 638 $ 246 $ 75 $ 70 $ 2,096 Ending balance, collectively evaluated for impairment $ 2,160 $ 3,794 $ 2,885 $ 3,289 $ 7,980 $ 4,126 $ 960 $ 25,194 Loans: Ending balance $ 89,129 $ 170,346 $ 175,458 $ 191,194 $ 862,738 $ 605,413 $ 75,684 $ 2,169,962 Ending balance, individually evaluated for impairment $ 12,577 $ 2,303 $ 698 $ 8,514 $ 5,646 $ 4,043 $ 70 $ 33,851 Ending balance, collectively evaluated for impairment $ 76,552 $ 168,043 $ 174,760 $ 182,680 $ 857,092 $ 601,370 $ 75,614 $ 2,136,111 Changes in the allowance for loan losses for the three and six months ended June 30, 2015 were as follows: Three Months Ended June 30, 2015 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,544 $ 4,358 $ 2,250 $ 2,777 $ 7,456 $ 4,125 $ 850 $ 24,360 Charge-offs (214 ) (250 ) (63 ) — (321 ) (1 ) (102 ) (951 ) Recoveries 1 334 153 — 146 1,200 40 1,874 Provision 452 256 685 48 115 (1,213 ) 174 517 Ending balance $ 2,783 $ 4,698 $ 3,025 $ 2,825 $ 7,396 $ 4,111 $ 962 $ 25,800 Six Months Ended June 30, 2015 Agricultural Commercial and Financial Real Estate: Construction and land development Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family Real Estate: Mortgage, multi- family and commercial Other Total (Amounts In Thousands) Allowance for loan losses: Beginning balance $ 2,515 $ 4,231 $ 2,241 $ 2,672 $ 7,419 $ 4,195 $ 747 $ 24,020 Charge-offs (257 ) (316 ) (147 ) — (668 ) (180 ) (150 ) (1,718 ) Recoveries 83 735 304 6 559 1,270 86 3,043 Provision 442 48 627 147 86 (1,174 ) 279 455 Ending balance $ 2,783 $ 4,698 $ 3,025 $ 2,825 $ 7,396 $ 4,111 $ 962 $ 25,800 Ending balance, individually evaluated for impairment $ 2 $ 507 $ 11 $ — $ 76 $ 55 $ 15 $ 666 Ending balance, collectively evaluated for impairment $ 2,781 $ 4,191 $ 3,014 $ 2,825 $ 7,320 $ 4,056 $ 947 $ 25,134 Loans: Ending balance $ 91,095 $ 172,854 $ 151,533 $ 173,529 $ 808,273 $ 553,924 $ 75,818 $ 2,027,026 Ending balance, individually evaluated for impairment $ 1,593 $ 2,481 $ 656 $ 2,314 $ 3,707 $ 3,407 $ 15 $ 14,173 Ending balance, collectively evaluated for impairment $ 89,502 $ 170,373 $ 150,877 $ 171,215 $ 804,566 $ 550,517 $ 75,803 $ 2,012,853
Schedule of credit quality indicators by type of loans	The following table presents the credit quality indicators by type of loans in each category as of June 30, 2016 and December 31, 2015 , respectively (amounts in thousands): Agricultural Commercial and Financial Real Estate: Construction, 1 to 4 family residential Real Estate: Construction, land development and commercial June 30, 2016 Grade: Excellent $ 1,957 $ 3,369 $ — $ 252 Good 15,716 34,040 1,593 12,054 Satisfactory 35,194 96,432 39,300 78,402 Monitor 9,666 19,601 11,156 20,369 Special Mention 12,794 11,874 5,065 6,220 Substandard 13,802 5,030 606 441 Total $ 89,129 $ 170,346 $ 57,720 $ 117,738 Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family first liens Real Estate: Mortgage, 1 to 4 family junior liens Real Estate: Mortgage, multi- family June 30, 2016 Grade: Excellent $ 2,429 $ 547 $ — $ 6,466 Good 45,441 15,155 2,492 65,693 Satisfactory 98,720 640,462 109,301 179,886 Monitor 28,893 49,621 3,937 31,001 Special Mention 6,584 17,269 1,846 1,983 Substandard 9,127 20,396 1,712 559 Total $ 191,194 $ 743,450 $ 119,288 $ 285,588 Real Estate: Mortgage, commercial Loans to individuals Obligations of state and political subdivisions Total June 30, 2016 Grade: Excellent $ 15,478 $ — $ 2,326 $ 32,824 Good 87,299 83 36,118 315,684 Satisfactory 186,309 23,753 12,249 1,500,008 Monitor 21,841 226 506 196,817 Special Mention 4,786 213 — 68,634 Substandard 4,112 210 — 55,995 Total $ 319,825 $ 24,485 $ 51,199 $ 2,169,962 Agricultural Commercial and Financial Real Estate: Construction, 1 to 4 family residential Real Estate: Construction, land development and commercial December 31, 2015 Grade: Excellent $ 1,786 $ 3,298 $ — $ 260 Good 15,959 38,764 1,898 11,570 Satisfactory 36,819 102,188 34,357 52,731 Monitor 18,064 27,181 8,684 11,550 Special Mention 25,356 8,231 5,842 6,542 Substandard 3,604 4,537 565 468 Total $ 101,588 $ 184,199 $ 51,346 $ 83,121 Real Estate: Mortgage, farmland Real Estate: Mortgage, 1 to 4 family first liens Real Estate: Mortgage, 1 to 4 family junior liens Real Estate: Mortgage, multi- family December 31, 2015 Grade: Excellent $ 2,559 $ 426 $ — $ 6,651 Good 31,186 15,773 2,992 64,002 Satisfactory 112,038 620,731 107,091 166,193 Monitor 27,304 55,499 4,198 29,732 Special Mention 11,181 16,237 1,846 4,873 Substandard 3,588 18,494 1,746 523 Total $ 187,856 $ 727,160 $ 117,873 $ 271,974 Real Estate: Mortgage, commercial Loans to individuals Obligations of state and political subdivisions Total December 31, 2015 Grade: Excellent $ 12,484 $ — $ 2,365 $ 29,829 Good 81,305 70 37,045 300,564 Satisfactory 187,728 23,197 12,425 1,455,498 Monitor 32,141 285 518 215,156 Special Mention 6,183 198 — 86,489 Substandard 3,568 269 18 37,380 Total $ 323,409 $ 24,019 $ 52,371 $ 2,124,916
Schedule of past due loans	Past due loans as of June 30, 2016 and December 31, 2015 were as follows: 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Current Total Loans Receivable Accruing Loans Past Due 90 Days or More (Amounts In Thousands) June 30, 2016 Agricultural $ 2,041 $ 94 $ 1,446 $ 3,581 $ 85,548 $ 89,129 $ 359 Commercial and financial 755 810 1,154 2,719 167,627 170,346 — Real estate: Construction, 1 to 4 family residential 347 405 173 925 56,795 57,720 — Construction, land development and commercial 45 199 85 329 117,409 117,738 — Mortgage, farmland 338 195 200 733 190,461 191,194 200 Mortgage, 1 to 4 family first liens 228 2,007 1,703 3,938 739,512 743,450 175 Mortgage, 1 to 4 family junior liens 39 8 137 184 119,104 119,288 — Mortgage, multi-family 132 — 40 172 285,416 285,588 — Mortgage, commercial 253 335 173 761 319,064 319,825 — Loans to individuals 79 62 — 141 24,344 24,485 — Obligations of state and political subdivisions — — — — 51,199 51,199 — $ 4,257 $ 4,115 $ 5,111 $ 13,483 $ 2,156,479 $ 2,169,962 $ 734 December 31, 2015 Agricultural $ 3,064 $ 961 $ — $ 4,025 $ 97,563 $ 101,588 $ — Commercial and financial 854 71 1,312 2,237 181,962 184,199 — Real estate: Construction, 1 to 4 family residential — — 214 214 51,132 51,346 — Construction, land development and commercial — — 88 88 $ 83,033 83,121 — Mortgage, farmland 320 88 — 408 187,448 187,856 — Mortgage, 1 to 4 family first liens 4,526 1,192 2,085 7,803 $ 719,357 727,160 406 Mortgage, 1 to 4 family junior liens 250 13 110 373 117,500 117,873 — Mortgage, multi-family 135 — 113 248 $ 271,726 271,974 — Mortgage, commercial 1,033 — 331 1,364 322,045 323,409 61 Loans to individuals 158 40 — 198 $ 23,821 24,019 — Obligations of state and political subdivisions — — — — 52,371 52,371 — $ 10,340 $ 2,365 $ 4,253 $ 16,958 $ 2,107,958 $ 2,124,916 $ 467
Schedule of impaired loan information	Certain impaired loan information by loan type at June 30, 2016 and December 31, 2015 , was as follows: June 30, 2016 December 31, 2015 Non-accrual loans (1) Accruing loans past due 90 days or more TDR loans Non- accrual loans (1) Accruing loans past due 90 days or more TDR loans (Amounts In Thousands) (Amounts In Thousands) Agricultural $ 1,670 $ 359 $ 96 $ — $ — $ 1,710 Commercial and financial 1,516 — 787 1,498 — 612 Real estate: Construction, 1 to 4 family residential 173 — 266 214 — 473 Construction, land development and commercial 140 — 120 145 — 122 Mortgage, farmland 1,272 200 1,626 — — 2,233 Mortgage, 1 to 4 family first liens 3,914 175 1,342 3,845 406 1,369 Mortgage, 1 to 4 family junior liens 188 — 26 279 — 27 Mortgage, multi-family 358 — — 449 — — Mortgage, commercial 1,089 — 2,596 985 61 1,733 $ 10,320 $ 734 $ 6,859 $ 7,415 $ 467 $ 8,279 (1) There were $5.02 million and $2.31 million of TDR loans included within nonaccrual loans as of June 30, 2016 and December 31, 2015 , respectively.
Schedule of information for TDR loans	Below is a summary of information for TDR loans as of June 30, 2016 and December 31, 2015 : June 30, 2016 December 31, 2015 Number of contracts Recorded investment Commitments outstanding Number of contracts Recorded investment Commitments outstanding (Amounts In Thousands) (Amounts In Thousands) Agricultural 4 $ 1,523 $ 65 7 $ 1,710 $ 32 Commercial and financial 12 1,946 252 8 1,818 241 Real estate: Construction, 1 to 4 family residential 2 438 — 3 646 138 Construction, land development and commercial 1 120 — 1 122 — Mortgage, farmland 7 2,897 — 5 2,233 — Mortgage, 1 to 4 family first liens 13 1,539 — 13 1,575 — Mortgage, 1 to 4 family junior liens 2 30 — 2 36 — Mortgage, multi-family — — — 1 71 — Mortgage, commercial 14 3,385 — 10 2,381 — Loans to individuals — — — — — — 55 $ 11,878 $ 317 50 $ 10,592 $ 411 The following is a summary of TDR loans that were modified during the three and six months ended June 30, 2016 : Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Number of contracts Pre-modification recorded investment Post-modification recorded investment Number of contracts Pre-modification recorded investment Post-modification recorded investment (Amounts In Thousands) (Amounts In Thousands) Agricultural 1 $ 562 $ 562 1 $ 562 $ 562 Commercial and financial — — — 4 349 349 Real estate: Construction, 1 to 4 family residential — — — 2 543 543 Construction, land development and commercial — — — — — — Mortgage, farmland — — — 1 132 132 Mortgage, 1 to 4 family first lien — — — — — — Mortgage, 1 to 4 family junior liens — — — — — — Mortgage, multi-family 1 539 539 1 539 539 Mortgage, commercial — — — 3 629 629 2 $ 1,101 $ 1,101 12 $ 2,754 $ 2,754
Schedule of impaired loans	Information regarding impaired loans as of and for the three and six months ended June 30, 2016 is as follows: June 30, 2016 Three Months Ended Six Months Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: (Amounts In Thousands) Agricultural $ 50 $ 195 $ — $ 91 $ 1 $ 97 $ 1 Commercial and financial 1,693 2,325 — 1,722 6 1,743 12 Real estate: Construction, 1 to 4 family residential 265 265 — 265 3 265 6 Construction, land development and commercial 205 292 — 205 1 208 3 Mortgage, farmland 1,089 1,206 — 1,090 13 1,095 26 Mortgage, 1 to 4 family first liens 4,029 4,983 — 4,075 13 4,136 27 Mortgage, 1 to 4 family junior liens 141 444 — 146 — 153 — Mortgage, multi-family 146 258 — 149 — 187 — Mortgage, commercial 2,823 4,176 — 2,853 25 2,893 50 Loans to individuals — 20 — — — — — $ 10,441 $ 14,164 $ — $ 10,596 $ 62 $ 10,777 $ 125 With an allowance recorded: Agricultural $ 12,527 $ 12,564 $ 837 $ 12,560 $ 140 $ 12,598 $ 282 Commercial and financial 610 623 217 643 5 696 11 Real estate: Construction, 1 to 4 family residential 173 184 2 173 — 173 — Construction, land development and commercial 55 57 11 55 — 56 — Mortgage, farmland 7,425 7,430 638 7,498 82 7,505 164 Mortgage, 1 to 4 family first liens 1,402 1,537 232 1,423 5 1,434 9 Mortgage, 1 to 4 family junior liens 74 232 14 76 — 78 1 Mortgage, multi-family 212 220 41 214 — 216 — Mortgage, commercial 862 896 34 868 9 875 17 Loans to individuals 70 70 70 69 2 83 4 $ 23,410 $ 23,813 $ 2,096 $ 23,579 $ 243 $ 23,714 $ 488 Total: Agricultural $ 12,577 $ 12,759 $ 837 $ 12,651 $ 141 $ 12,695 $ 283 Commercial and financial 2,303 2,948 217 2,365 11 2,439 23 Real estate: Construction, 1 to 4 family residential 438 449 2 438 3 438 6 Construction, land development and commercial 260 349 11 260 1 264 3 Mortgage, farmland 8,514 8,636 638 8,588 95 8,600 190 Mortgage, 1 to 4 family first liens 5,431 6,520 232 5,498 18 5,570 36 Mortgage, 1 to 4 family junior liens 215 676 14 222 — 231 1 Mortgage, multi-family 358 478 41 363 — 403 — Mortgage, commercial 3,685 5,072 34 3,721 34 3,768 67 Loans to individuals 70 90 70 69 2 83 4 $ 33,851 $ 37,977 $ 2,096 $ 34,175 $ 305 $ 34,491 $ 613 Information regarding impaired loans as of December 31, 2015 is as follows: Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: (Amounts In Thousands) Agricultural $ 1,609 $ 1,773 $ — Commercial and financial 1,263 1,981 — Real estate: Construction, 1 to 4 family residential 238 238 — Construction, land development and commercial 210 314 — Mortgage, farmland 2,233 2,351 — Mortgage, 1 to 4 family first liens 3,558 4,419 — Mortgage, 1 to 4 family junior liens 189 500 — Mortgage, multi-family 157 226 — Mortgage, commercial 1,831 3,018 — Loans to individuals — 20 — $ 11,288 $ 14,840 $ — With an allowance recorded: Agricultural $ 101 $ 101 $ 1 Commercial and financial 847 847 324 Real estate: Construction, 1 to 4 family residential 449 461 9 Construction, land development and commercial 57 58 13 Mortgage, farmland — — — Mortgage, 1 to 4 family first liens 2,062 2,156 306 Mortgage, 1 to 4 family junior liens 117 270 20 Mortgage, multi-family 292 332 58 Mortgage, commercial 948 1,030 52 Loans to individuals 100 100 100 $ 4,973 $ 5,355 $ 883 Total: Agricultural $ 1,710 $ 1,874 $ 1 Commercial and financial 2,110 2,828 324 Real estate: Construction, 1 to 4 family residential 687 699 9 Construction, land development and commercial 267 372 13 Mortgage, farmland 2,233 2,351 — Mortgage, 1 to 4 family first liens 5,620 6,575 306 Mortgage, 1 to 4 family junior liens 306 770 20 Mortgage, multi-family 449 558 58 Mortgage, commercial 2,779 4,048 52 Loans to individuals 100 120 100 $ 16,261 $ 20,195 $ 883

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Carrying value and estimated fair values of entity's financial instruments	The carrying value and estimated fair values of the Company's financial instruments as of June 30, 2016 are as follows: June 30, 2016 Carrying Amount Estimated Fair Value Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) (Amounts In Thousands) Financial instrument assets: Cash and cash equivalents $ 36,614 $ 36,614 $ 36,614 $ — $ — Investment securities 260,621 260,621 — 260,621 — Loans held for sale 7,239 7,239 — 7,239 — Loans Agricultural 86,132 86,173 — — 86,173 Commercial and financial 166,335 166,286 — — 166,286 Real estate: Construction, 1 to 4 family residential 56,738 56,707 — — 56,707 Construction, land development and commercial 115,822 115,847 — — 115,847 Mortgage, farmland 187,267 187,578 — — 187,578 Mortgage, 1 to 4 family first liens 737,242 741,638 — — 741,638 Mortgage, 1 to 4 family junior liens 118,063 122,980 — — 122,980 Mortgage, multi-family 283,830 283,577 — — 283,577 Mortgage, commercial 317,382 316,736 — — 316,736 Loans to individuals 23,839 23,820 — — 23,820 Obligations of state and political subdivisions 50,815 50,353 — — 50,353 Accrued interest receivable 9,601 9,601 — 9,601 — Total financial instrument assets $ 2,457,540 $ 2,465,770 $ 36,614 $ 277,461 $ 2,151,695 Financial instrument liabilities Deposits Noninterest-bearing deposits $ 304,155 $ 304,155 $ — $ 304,155 $ — Interest-bearing deposits 1,591,853 1,593,284 — 1,593,284 — Other borrowings 45,132 45,132 — 45,132 — Federal Home Loan Bank borrowings 240,000 239,859 — 239,859 — Interest rate swaps 6,611 6,611 — 6,611 — Accrued interest payable 844 844 — 844 — Total financial instrument liabilities $ 2,188,595 $ 2,189,885 $ — $ 2,189,885 $ — Face Amount Financial instrument with off-balance sheet risk: Loan commitments $ 420,305 $ — $ — $ — $ — Letters of credit 9,935 — — — — Total financial instrument liabilities with off-balance-sheet risk $ 430,240 $ — $ — $ — $ — (1) Considered Level 1 under Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures (“ASC 820”). (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. The carrying value and estimated fair values of the Company's financial instruments as of December 31, 2015 are as follows: December 31, 2015 Carrying Amount Estimated Fair Value Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) (Amounts In Thousands) Financial instrument assets: Cash and cash equivalents $ 35,427 $ 35,427 $ 35,427 $ — $ — Investment securities 276,069 276,069 — 276,069 — Loans held for sale 5,554 5,554 — 5,554 — Loans Agricultural 98,506 98,530 — — 98,530 Commercial and financial 179,682 179,649 — — 179,649 Real estate: Construction, 1 to 4 family residential 50,480 50,487 — — 50,487 Construction, land development and commercial 81,707 81,705 — — 81,705 Mortgage, farmland 184,514 184,640 — — 184,640 Mortgage, 1 to 4 family first liens 720,229 718,566 — — 718,566 Mortgage, 1 to 4 family junior liens 116,632 122,173 — — 122,173 Mortgage, multi-family 270,261 272,446 — — 272,446 Mortgage, commercial 320,899 319,090 — — 319,090 Loans to individuals 23,518 23,509 — — 23,509 Obligations of state and political subdivisions 51,978 51,073 — — 51,073 Accrued interest receivable 8,672 8,672 — 8,672 — Total financial instrument assets $ 2,424,128 $ 2,427,590 $ 35,427 $ 290,295 $ 2,101,868 Financial instrument liabilities: Deposits Noninterest-bearing deposits $ 314,968 $ 314,968 $ — $ 314,968 $ — Interest-bearing deposits 1,575,734 1,577,684 — 1,577,684 — Other borrowings 44,051 44,051 — 44,051 — Federal Home Loan Bank borrowings 225,000 226,157 — 226,157 — Interest rate swaps 4,180 4,180 4,180 Accrued interest payable 846 846 — 846 — Total financial instrument liabilities $ 2,164,779 $ 2,167,886 $ — $ 2,167,886 $ — Face Amount Financial instrument with off-balance sheet risk: Loan commitments $ 344,602 $ — $ — $ — $ — Letters of credit 11,718 — — — — Total financial instrument liabilities with off-balance-sheet risk $ 356,320 $ — $ — $ — $ — (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
Schedule of assets and liabilities measured at fair value on a recurring basis	The table below represents the balances of assets and liabilities measured at fair value on a recurring basis: June 30, 2016 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Securities available for sale (Amounts In Thousands) U.S. Treasury $ — $ 25,342 $ — $ 25,342 State and political subdivisions — 63,315 — 63,315 Other securities (FHLB, FHLMC and FNMA) — 159,341 — 159,341 Derivative Financial Instruments Interest rate swaps $ — (6,611 ) $ — (6,611 ) Total $ — $ 241,387 $ — $ 241,387 December 31, 2015 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Securities available for sale (Amounts In Thousands) U.S. Treasury $ — $ 24,978 $ — $ 24,978 State and political subdivisions — 173,929 — 173,929 Other securities (FHLB, FHLMC and FNMA) — 65,328 — 65,328 Derivative Financial Instruments Interest rate swaps — (4,180 ) — (4,180 ) Total $ — $ 260,055 $ — $ 260,055 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
Schedule of assets measured at fair value on a nonrecurring basis	The following tables present the Company’s assets that are measured at fair value on a nonrecurring basis. June 30, 2016 Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Total Losses Total Losses (Amounts in Thousands) Loans (4) Agricultural $ — $ — $ 1,345 $ 1,345 $ — $ — Commercial and financial — — 1,480 1,480 72 92 Real Estate: Construction, 1 to 4 family residential — — 436 436 — — Construction, land development and commercial — — 129 129 — — Mortgage, farmland — — 1,972 1,972 — — Mortgage, 1 to 4 family first liens — — 4,609 4,609 79 354 Mortgage, 1 to 4 family junior liens — — 201 201 — — Mortgage, multi-family — — 317 317 — — Mortgage, commercial — — 1,764 1,764 65 Loans to individuals — — — — — — Foreclosed assets (5) — — — — — — Total $ — $ — $ 12,253 $ 12,253 $ 151 $ 511 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. (4) Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero. (5) Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets. Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis (continued) December 31, 2015 Year Ended December 31, 2015 Readily Available Market Prices(1) Observable Market Prices(2) Company Determined Market Prices(3) Total at Fair Value Total Losses (Amounts in Thousands) Loans (4) Agricultural $ — $ — $ 1,470 $ 1,470 $ 116 Commercial and financial — — 1,178 1,178 56 Real Estate: Construction, 1 to 4 family residential — — 482 482 161 Construction, land development and commercial — — 132 132 35 Mortgage, farmland — — 2,233 2,233 — Mortgage, 1 to 4 family first liens — — 4,487 4,487 529 Mortgage, 1 to 4 family junior liens — — 286 286 166 Mortgage, multi-family — — 391 391 38 Mortgage, commercial — — 1,152 1,152 140 Loans to individuals — — — — — Foreclosed assets (5) — — 100 100 69 Total $ — $ — $ 11,911 $ 11,911 $ 1,310 (1) Considered Level 1 under ASC 820. (2) Considered Level 2 under ASC 820. (3) Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market. (4) Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero. (5) Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of banks commitments	A summary of the Bank’s commitments at June 30, 2016 and December 31, 2015 is as follows: June 30, 2016 December 31, 2015 (Amounts In Thousands) Firm loan commitments and unused portion of lines of credit: Home equity loans $ 47,329 $ 44,376 Credit cards 43,999 41,518 Commercial, real estate and home construction 130,282 98,613 Commercial lines and real estate purchase loans 198,695 160,095 Outstanding letters of credit 9,935 11,718

Derivative Financial Instrume26

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Identification of the balance sheet category and fair values of the derivative instruments designated as cash flow hedges	The table below identifies the balance sheet category and fair values of the Bank’s derivative instruments designated as cash flow hedges as of June 30, 2016 and December 31, 2015 : Notional Amount Fair Value Balance Sheet Category Maturity (Amounts in Thousands) June 30, 2016 Interest rate swap $ 25,000 $ (2,194 ) Other Liabilities 11/9/2020 Interest rate swap 25,000 (4,417 ) Other Liabilities 11/7/2023 December 31, 2015 Interest rate swap $ 25,000 $ (1,501 ) Other Liabilities 11/9/2020 Interest rate swap 25,000 (2,679 ) Other Liabilities 11/7/2023
Identification of the gains and losses recognized on the derivative instruments designated as cash flow hedges	The table below identifies the gains and losses recognized on the Bank’s derivative instruments designated as cash flow hedges as of June 30, 2016 and December 31, 2015 : Effective Portion Ineffective Portion Recognized in OCI Reclassifed from AOCI into Income Recognized in Income on Derivatives Amount of Gain (Loss) Category Amount of Gain (Loss) Category Amount of Gain (Loss) (Amounts in Thousands) June 30, 2016 Interest rate swap $ (428 ) Interest Expense $ — Other Income $ — Interest rate swap (1,073 ) Interest Expense — Other Income — December 31, 2015 Interest rate swap $ (394 ) Interest Expense $ — Other Income $ — Interest rate swap (461 ) Interest Expense — Other Income —

Summary of Significant Accoun27

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2016segment
Accounting Policies [Abstract]
Number of operating segments	1

Earnings Per Share (Details)

Earnings Per Share (Details) $ / shares in Units, $ in Thousands	Mar. 24, 2015	Jun. 30, 2016USD ($)$ / sharesshares	Jun. 30, 2015USD ($)$ / sharesshares	Jun. 30, 2016USD ($)$ / sharesshares	Jun. 30, 2015USD ($)$ / sharesshares	Mar. 31, 2016shares	Dec. 31, 2015shares	Mar. 31, 2015shares	Dec. 31, 2014shares
Earnings Per Share [Abstract]
Stock split	2
Summary of computation of basic and diluted earnings per share [Abstract]
Common shares outstanding at the beginning of the period (shares)						9,289,662	9,322,054	9,362,061	9,365,176
Weighted average number of net shares redeemed (shares)		(3,339)	(7,153)	(24,752)	(6,075)
Weighted average shares outstanding (basic) (shares)		9,286,323	9,354,908	9,297,302	9,359,101
Weighted average of potential dilutive shares attributable to stock options granted, computed under the treasury stock method (shares)		6,481	5,448	6,259	5,159
Weighted average number of shares (diluted) (shares)		9,292,804	9,360,356	9,303,561	9,364,260
Net income (In thousands) | $		$ 7,967	$ 7,470	$ 15,667	$ 14,850
Earnings per share:
Basic (in dollars per share) | $ / shares		$ 0.86	$ 0.80	$ 1.69	$ 1.59
Diluted (in dollars per share) | $ / shares		$ 0.85	$ 0.80	$ 1.68	$ 1.59

Other Comprehensive Income (L29

Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Tax effect	$ 831	$ 741
Net-of-tax amount	(1,342)	(1,195)
Unrealized gains on available-for-sale securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Net unrealized gain (loss)	4,438	2,244
Net unrealized loss on derivatives used for cash flow hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Net unrealized gain (loss)	$ (6,611)	$ (4,180)

Securities (Details)

Securities (Details) $ in Thousands	Jun. 30, 2016USD ($)security	Dec. 31, 2015USD ($)security
Securities available for sale
Securities available for sale	$ 247,998	$ 264,235
Securities available for sale, Percent	100.00%	100.00%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 243,560	$ 261,991
Gross Unrealized Gains	4,462	2,548
Gross Unrealized (Losses)	(24)	(304)
Estimated Fair Value	247,998	264,235
Amortized Cost
Due in one year or less	35,094
Due after one year through five years	144,645
Due after five years through ten years	62,485
Due over ten years	1,336
Amortized Cost	243,560
Fair Value
Due in one year or less	35,245
Due after one year through five years	147,041
Due after five years through ten years	64,374
Due over ten years	1,338
Fair Value	247,998	$ 264,235
Carrying value of investment securities pledged to collateralize short-term borrowings	$ 70,160
Less than 12 months
Number of securities | security	12	74
Fair Value	$ 4,537	$ 57,842
Unrealized Loss	$ (7)	$ (230)
Percentage	0.15%	0.40%
12 months or more
Number of securities | security	15	27
Fair Value	$ 2,558	$ 5,633
Unrealized Loss	$ (17)	$ (74)
Percentage	0.66%	1.31%
Total
Number of securities | security	27	101
Fair Value	$ 7,095	$ 63,475
Unrealized Loss	$ (24)	$ (304)
Percentage	0.34%	0.48%
U.S. Treasury [Member]
Securities available for sale
Securities available for sale	$ 25,342	$ 24,978
Securities available for sale, Percent	10.22%	9.45%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 24,917	$ 24,893
Gross Unrealized Gains	425	92
Gross Unrealized (Losses)	0	(7)
Estimated Fair Value	25,342	24,978
Fair Value
Fair Value	$ 25,342	$ 24,978
Less than 12 months
Number of securities | security	0	3
Fair Value	$ 0	$ 7,455
Unrealized Loss	$ 0	$ (7)
Percentage	0.00%	0.09%
12 months or more
Number of securities | security	0	0
Fair Value	$ 0	$ 0
Unrealized Loss	$ 0	$ 0
Percentage	0.00%	0.00%
Total
Number of securities | security	0	3
Fair Value	$ 0	$ 7,455
Unrealized Loss	$ 0	$ (7)
Percentage	0.00%	0.09%
Other securities (FHLB, FHLMC and FNMA) [Member]
Securities available for sale
Securities available for sale	$ 63,315	$ 65,328
Securities available for sale, Percent	25.53%	24.72%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 62,748	$ 65,400
Gross Unrealized Gains	568	81
Gross Unrealized (Losses)	(1)	(153)
Estimated Fair Value	63,315	65,328
Fair Value
Fair Value	$ 63,315	$ 65,328
Less than 12 months
Number of securities | security	1	15
Fair Value	$ 1,802	$ 36,830
Unrealized Loss	$ (1)	$ (153)
Percentage	0.06%	0.42%
12 months or more
Number of securities | security	0	0
Fair Value	$ 0	$ 0
Unrealized Loss	$ 0	$ 0
Percentage	0.00%	0.00%
Total
Number of securities | security	1	15
Fair Value	$ 1,802	$ 36,830
Unrealized Loss	$ (1)	$ (153)
Percentage	0.06%	0.42%
State and political subdivisions [Member]
Securities available for sale
Securities available for sale	$ 159,341	$ 173,929
Securities available for sale, Percent	64.25%	65.83%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 155,895	$ 171,698
Gross Unrealized Gains	3,469	2,375
Gross Unrealized (Losses)	(23)	(144)
Estimated Fair Value	159,341	173,929
Fair Value
Fair Value	$ 159,341	$ 173,929
Less than 12 months
Number of securities | security	11	56
Fair Value	$ 2,735	$ 13,557
Unrealized Loss	$ (6)	$ (70)
Percentage	0.22%	0.52%
12 months or more
Number of securities | security	15	27
Fair Value	$ 2,558	$ 5,633
Unrealized Loss	$ (17)	$ (74)
Percentage	0.66%	1.31%
Total
Number of securities | security	26	83
Fair Value	$ 5,293	$ 19,190
Unrealized Loss	$ (23)	$ (144)
Percentage	0.43%	0.75%

Loans (Details)

Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Summary of classes of loans (abstract)
Loans and receivable	$ 2,169,962	$ 2,124,916	$ 2,027,026
Net unamortized fees and costs	793	768
Loans and receivable, gross	2,170,755	2,125,684
Less allowance for loan losses	27,290	26,510
Loans and receivable, net	2,143,465	2,099,174
Agricultural [Member]
Summary of classes of loans (abstract)
Loans and receivable	89,129	101,588	91,095
Commercial and financial [Member]
Summary of classes of loans (abstract)
Loans and receivable	170,346	184,199	172,854
Real Estate: Construction, 1 to 4 family residential [Member]
Summary of classes of loans (abstract)
Loans and receivable	57,720	51,346
Real Estate: Construction, land development and commercial [Member]
Summary of classes of loans (abstract)
Loans and receivable	117,738	83,121
Real Estate: Mortgage, farmland [Member]
Summary of classes of loans (abstract)
Loans and receivable	191,194	187,856	$ 173,529
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Summary of classes of loans (abstract)
Loans and receivable	743,450	727,160
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Summary of classes of loans (abstract)
Loans and receivable	119,288	117,873
Real Estate: Mortgage, multi-family [Member]
Summary of classes of loans (abstract)
Loans and receivable	285,588	271,974
Real Estate: Mortgage, commercial [Member]
Summary of classes of loans (abstract)
Loans and receivable	319,825	323,409
Loans to individuals [Member]
Summary of classes of loans (abstract)
Loans and receivable	24,485	24,019
Obligations of state and political subdivisions [Member]
Summary of classes of loans (abstract)
Loans and receivable	$ 51,199	$ 52,371

Loans, Allowance For Credit Los

Loans, Allowance For Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 27,130	$ 24,360	$ 26,510	$ 24,020
Charge-offs	(396)	(951)	(1,040)	(1,718)
Recoveries	1,277	1,874	1,992	3,043
Provision	(721)	517	(172)	455
Ending balance	27,130	24,360	26,510	24,020	$ 27,290	$ 26,510	$ 25,800
Ending balance, individually evaluated for impairment	2,096	666	2,096	666
Ending balance, collectively evaluated for impairment	25,194	25,134	25,194	25,134
Loan [Abstract]
Total Loans Receivable					2,169,962	2,124,916	2,027,026
Ending balance, individually evaluated for impairment	33,851	14,173	33,851	14,173
Ending balance, collectively evaluated for impairment	2,136,111	2,012,853	2,136,111	2,012,853
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,954	2,544	3,082	2,515
Charge-offs	(25)	(214)	(25)	(257)
Recoveries	30	1	172	83
Provision	38	452	(232)	442
Ending balance	2,954	2,544	3,082	2,515	2,997	3,082	2,783
Ending balance, individually evaluated for impairment	837	2	837	2
Ending balance, collectively evaluated for impairment	2,160	2,781	2,160	2,781
Loan [Abstract]
Total Loans Receivable					89,129	101,588	91,095
Ending balance, individually evaluated for impairment	12,577	1,593	12,577	1,593
Ending balance, collectively evaluated for impairment	76,552	89,502	76,552	89,502
Commercial and Financial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	4,311	4,358	4,517	4,231
Charge-offs	(79)	(250)	(134)	(316)
Recoveries	367	334	620	735
Provision	(588)	256	(992)	48
Ending balance	4,311	4,358	4,517	4,231	4,011	4,517	4,698
Ending balance, individually evaluated for impairment	217	507	217	507
Ending balance, collectively evaluated for impairment	3,794	4,191	3,794	4,191
Loan [Abstract]
Total Loans Receivable					170,346	184,199	172,854
Ending balance, individually evaluated for impairment	2,303	2,481	2,303	2,481
Ending balance, collectively evaluated for impairment	168,043	170,373	168,043	170,373
Real Estate: Construction and land development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,759	2,250	2,280	2,241
Charge-offs	0	(63)	0	(147)
Recoveries	555	153	607	304
Provision	(416)	685	11	627
Ending balance	2,759	2,250	2,280	2,241	2,898	2,280	3,025
Ending balance, individually evaluated for impairment	13	11	13	11
Ending balance, collectively evaluated for impairment	2,885	3,014	2,885	3,014
Loan [Abstract]
Total Loans Receivable					175,458		151,533
Ending balance, individually evaluated for impairment	698	656	698	656
Ending balance, collectively evaluated for impairment	174,760	150,877	174,760	150,877
Real Estate: Mortgage, farmland [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	3,944	2,777	3,342	2,672
Charge-offs	0	0	(10)	0
Recoveries	0	0	0	6
Provision	(17)	48	595	147
Ending balance	3,944	2,777	3,342	2,672	3,927	3,342	2,825
Ending balance, individually evaluated for impairment	638	0	638	0
Ending balance, collectively evaluated for impairment	3,289	2,825	3,289	2,825
Loan [Abstract]
Total Loans Receivable					191,194	187,856	173,529
Ending balance, individually evaluated for impairment	8,514	2,314	8,514	2,314
Ending balance, collectively evaluated for impairment	182,680	171,215	182,680	171,215
Real Estate: Mortgage, 1 to 4 family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	8,036	7,456	8,172	7,419
Charge-offs	(184)	(321)	(528)	(668)
Recoveries	279	146	492	559
Provision	95	115	90	86
Ending balance	8,036	7,456	8,172	7,419	8,226	8,172	7,396
Ending balance, individually evaluated for impairment	246	76	246	76
Ending balance, collectively evaluated for impairment	7,980	7,320	7,980	7,320
Loan [Abstract]
Total Loans Receivable					862,738		808,273
Ending balance, individually evaluated for impairment	5,646	3,707	5,646	3,707
Ending balance, collectively evaluated for impairment	857,092	804,566	857,092	804,566
Real Estate: Mortgage, multi-family and commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	4,190	4,125	4,223	4,195
Charge-offs	0	(1)	(66)	(180)
Recoveries	8	1,200	19	1,270
Provision	3	(1,213)	25	(1,174)
Ending balance	4,190	4,125	4,223	4,195	4,201	4,223	4,111
Ending balance, individually evaluated for impairment	75	55	75	55
Ending balance, collectively evaluated for impairment	4,126	4,056	4,126	4,056
Loan [Abstract]
Total Loans Receivable					605,413		553,924
Ending balance, individually evaluated for impairment	4,043	3,407	4,043	3,407
Ending balance, collectively evaluated for impairment	601,370	550,517	601,370	550,517
Others [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	936	850	894	747
Charge-offs	(108)	(102)	(277)	(150)
Recoveries	38	40	82	86
Provision	164	174	331	279
Ending balance	936	850	894	747	1,030	$ 894	962
Ending balance, individually evaluated for impairment	70	15	70	15
Ending balance, collectively evaluated for impairment	960	947	960	947
Loan [Abstract]
Total Loans Receivable					$ 75,684		$ 75,818
Ending balance, individually evaluated for impairment	70	15	70	15
Ending balance, collectively evaluated for impairment	$ 75,614	$ 75,803	$ 75,614	$ 75,803

Loans, Credit Quality Indicator

Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	$ 2,169,962	$ 2,124,916	$ 2,027,026
Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	32,824	29,829
Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	315,684	300,564
Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,500,008	1,455,498
Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	196,817	215,156
Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	68,634	86,489
Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	55,995	37,380
Agricultural [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	89,129	101,588	91,095
Agricultural [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,957	1,786
Agricultural [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	15,716	15,959
Agricultural [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	35,194	36,819
Agricultural [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	9,666	18,064
Agricultural [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	12,794	25,356
Agricultural [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	13,802	3,604
Commercial and Financial [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	170,346	184,199	172,854
Commercial and Financial [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	3,369	3,298
Commercial and Financial [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	34,040	38,764
Commercial and Financial [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	96,432	102,188
Commercial and Financial [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	19,601	27,181
Commercial and Financial [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	11,874	8,231
Commercial and Financial [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	5,030	4,537
Real Estate: Construction, 1 to 4 family residential [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	57,720	51,346
Real Estate: Construction, 1 to 4 family residential [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	0	0
Real Estate: Construction, 1 to 4 family residential [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,593	1,898
Real Estate: Construction, 1 to 4 family residential [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	39,300	34,357
Real Estate: Construction, 1 to 4 family residential [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	11,156	8,684
Real Estate: Construction, 1 to 4 family residential [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	5,065	5,842
Real Estate: Construction, 1 to 4 family residential [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	606	565
Real Estate: Construction, land development and commercial [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	117,738	83,121
Real Estate: Construction, land development and commercial [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	252	260
Real Estate: Construction, land development and commercial [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	12,054	11,570
Real Estate: Construction, land development and commercial [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	78,402	52,731
Real Estate: Construction, land development and commercial [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	20,369	11,550
Real Estate: Construction, land development and commercial [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	6,220	6,542
Real Estate: Construction, land development and commercial [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	441	468
Real Estate: Mortgage, farmland [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	191,194	187,856	$ 173,529
Real Estate: Mortgage, farmland [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	2,429	2,559
Real Estate: Mortgage, farmland [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	45,441	31,186
Real Estate: Mortgage, farmland [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	98,720	112,038
Real Estate: Mortgage, farmland [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	28,893	27,304
Real Estate: Mortgage, farmland [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	6,584	11,181
Real Estate: Mortgage, farmland [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	9,127	3,588
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	743,450	727,160
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	547	426
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	15,155	15,773
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	640,462	620,731
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	49,621	55,499
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	17,269	16,237
Real Estate: Mortgage, 1 to 4 family first liens [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	20,396	18,494
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	119,288	117,873
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	0	0
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	2,492	2,992
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	109,301	107,091
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	3,937	4,198
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,846	1,846
Real Estate: Mortgage, 1 to 4 family junior liens [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,712	1,746
Real Estate: Mortgage, multi-family [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	285,588	271,974
Real Estate: Mortgage, multi-family [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	6,466	6,651
Real Estate: Mortgage, multi-family [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	65,693	64,002
Real Estate: Mortgage, multi-family [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	179,886	166,193
Real Estate: Mortgage, multi-family [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	31,001	29,732
Real Estate: Mortgage, multi-family [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	1,983	4,873
Real Estate: Mortgage, multi-family [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	559	523
Real Estate: Mortgage, commercial [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	319,825	323,409
Real Estate: Mortgage, commercial [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	15,478	12,484
Real Estate: Mortgage, commercial [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	87,299	81,305
Real Estate: Mortgage, commercial [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	186,309	187,728
Real Estate: Mortgage, commercial [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	21,841	32,141
Real Estate: Mortgage, commercial [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	4,786	6,183
Real Estate: Mortgage, commercial [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	4,112	3,568
Loans to individuals [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	24,485	24,019
Loans to individuals [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	0	0
Loans to individuals [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	83	70
Loans to individuals [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	23,753	23,197
Loans to individuals [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	226	285
Loans to individuals [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	213	198
Loans to individuals [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	210	269
Obligations of state and political subdivisions [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	51,199	52,371
Obligations of state and political subdivisions [Member] | Excellent [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	2,326	2,365
Obligations of state and political subdivisions [Member] | Good [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	36,118	37,045
Obligations of state and political subdivisions [Member] | Satisfactory [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	12,249	12,425
Obligations of state and political subdivisions [Member] | Monitor [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	506	518
Obligations of state and political subdivisions [Member] | Special Mention [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	0	0
Obligations of state and political subdivisions [Member] | Substandard [Member]
Summary of credit quality indicators by type of loans [Abstract]
Loans and receivable	$ 0	$ 18

Loans, Past Due Receivables (De

Loans, Past Due Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Schedule of past due loans [Abstract]
Total Past Due	$ 13,483	$ 16,958
Current	2,156,479	2,107,958
Total Loans Receivable	2,169,962	2,124,916	$ 2,027,026
Accruing Loans Past Due 90 Days or More	734	467
Agricultural [Member]
Schedule of past due loans [Abstract]
Total Past Due	3,581	4,025
Current	85,548	97,563
Total Loans Receivable	89,129	101,588	91,095
Accruing Loans Past Due 90 Days or More	359	0
Commercial and Financial [Member]
Schedule of past due loans [Abstract]
Total Past Due	2,719	2,237
Current	167,627	181,962
Total Loans Receivable	170,346	184,199	172,854
Accruing Loans Past Due 90 Days or More	0	0
Real Estate: Construction, 1 to 4 family residential [Member]
Schedule of past due loans [Abstract]
Total Past Due	925	214
Current	56,795	51,132
Total Loans Receivable	57,720	51,346
Accruing Loans Past Due 90 Days or More	0	0
Real Estate: Construction, land development and commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	329	88
Current	117,409	83,033
Total Loans Receivable	117,738	83,121
Accruing Loans Past Due 90 Days or More	0	0
Real Estate: Mortgage, farmland [Member]
Schedule of past due loans [Abstract]
Total Past Due	733	408
Current	190,461	187,448
Total Loans Receivable	191,194	187,856	$ 173,529
Accruing Loans Past Due 90 Days or More	200	0
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	3,938	7,803
Current	739,512	719,357
Total Loans Receivable	743,450	727,160
Accruing Loans Past Due 90 Days or More	175	406
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	184	373
Current	119,104	117,500
Total Loans Receivable	119,288	117,873
Accruing Loans Past Due 90 Days or More	0	0
Real Estate: Mortgage, multi-family [Member]
Schedule of past due loans [Abstract]
Total Past Due	172	248
Current	285,416	271,726
Total Loans Receivable	285,588	271,974
Accruing Loans Past Due 90 Days or More	0	0
Real Estate: Mortgage, commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	761	1,364
Current	319,064	322,045
Total Loans Receivable	319,825	323,409
Accruing Loans Past Due 90 Days or More	0	61
Loans to individuals [Member]
Schedule of past due loans [Abstract]
Total Past Due	141	198
Current	24,344	23,821
Total Loans Receivable	24,485	24,019
Accruing Loans Past Due 90 Days or More	0	0
Obligations of state and political subdivisions [Member]
Schedule of past due loans [Abstract]
Total Past Due	0	0
Current	51,199	52,371
Total Loans Receivable	51,199	52,371
Accruing Loans Past Due 90 Days or More	0	0
30 - 59 Days Past Due [Member]
Schedule of past due loans [Abstract]
Total Past Due	4,257	10,340
30 - 59 Days Past Due [Member] | Agricultural [Member]
Schedule of past due loans [Abstract]
Total Past Due	2,041	3,064
30 - 59 Days Past Due [Member] | Commercial and Financial [Member]
Schedule of past due loans [Abstract]
Total Past Due	755	854
30 - 59 Days Past Due [Member] | Real Estate: Construction, 1 to 4 family residential [Member]
Schedule of past due loans [Abstract]
Total Past Due	347	0
30 - 59 Days Past Due [Member] | Real Estate: Construction, land development and commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	45	0
30 - 59 Days Past Due [Member] | Real Estate: Mortgage, farmland [Member]
Schedule of past due loans [Abstract]
Total Past Due	338	320
30 - 59 Days Past Due [Member] | Real Estate: Mortgage, 1 to 4 family first liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	228	4,526
30 - 59 Days Past Due [Member] | Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	39	250
30 - 59 Days Past Due [Member] | Real Estate: Mortgage, multi-family [Member]
Schedule of past due loans [Abstract]
Total Past Due	132	135
30 - 59 Days Past Due [Member] | Real Estate: Mortgage, commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	253	1,033
30 - 59 Days Past Due [Member] | Loans to individuals [Member]
Schedule of past due loans [Abstract]
Total Past Due	79	158
30 - 59 Days Past Due [Member] | Obligations of state and political subdivisions [Member]
Schedule of past due loans [Abstract]
Total Past Due	0	0
60 - 89 Days Past Due [Member]
Schedule of past due loans [Abstract]
Total Past Due	4,115	2,365
60 - 89 Days Past Due [Member] | Agricultural [Member]
Schedule of past due loans [Abstract]
Total Past Due	94	961
60 - 89 Days Past Due [Member] | Commercial and Financial [Member]
Schedule of past due loans [Abstract]
Total Past Due	810	71
60 - 89 Days Past Due [Member] | Real Estate: Construction, 1 to 4 family residential [Member]
Schedule of past due loans [Abstract]
Total Past Due	405	0
60 - 89 Days Past Due [Member] | Real Estate: Construction, land development and commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	199	0
60 - 89 Days Past Due [Member] | Real Estate: Mortgage, farmland [Member]
Schedule of past due loans [Abstract]
Total Past Due	195	88
60 - 89 Days Past Due [Member] | Real Estate: Mortgage, 1 to 4 family first liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	2,007	1,192
60 - 89 Days Past Due [Member] | Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	8	13
60 - 89 Days Past Due [Member] | Real Estate: Mortgage, multi-family [Member]
Schedule of past due loans [Abstract]
Total Past Due	0	0
60 - 89 Days Past Due [Member] | Real Estate: Mortgage, commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	335	0
60 - 89 Days Past Due [Member] | Loans to individuals [Member]
Schedule of past due loans [Abstract]
Total Past Due	62	40
60 - 89 Days Past Due [Member] | Obligations of state and political subdivisions [Member]
Schedule of past due loans [Abstract]
Total Past Due	0	0
90 Days or More Past Due [Member]
Schedule of past due loans [Abstract]
Total Past Due	5,111	4,253
90 Days or More Past Due [Member] | Agricultural [Member]
Schedule of past due loans [Abstract]
Total Past Due	1,446	0
90 Days or More Past Due [Member] | Commercial and Financial [Member]
Schedule of past due loans [Abstract]
Total Past Due	1,154	1,312
90 Days or More Past Due [Member] | Real Estate: Construction, 1 to 4 family residential [Member]
Schedule of past due loans [Abstract]
Total Past Due	173	214
90 Days or More Past Due [Member] | Real Estate: Construction, land development and commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	85	88
90 Days or More Past Due [Member] | Real Estate: Mortgage, farmland [Member]
Schedule of past due loans [Abstract]
Total Past Due	200	0
90 Days or More Past Due [Member] | Real Estate: Mortgage, 1 to 4 family first liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	1,703	2,085
90 Days or More Past Due [Member] | Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Schedule of past due loans [Abstract]
Total Past Due	137	110
90 Days or More Past Due [Member] | Real Estate: Mortgage, multi-family [Member]
Schedule of past due loans [Abstract]
Total Past Due	40	113
90 Days or More Past Due [Member] | Real Estate: Mortgage, commercial [Member]
Schedule of past due loans [Abstract]
Total Past Due	173	331
90 Days or More Past Due [Member] | Loans to individuals [Member]
Schedule of past due loans [Abstract]
Total Past Due	0	0
90 Days or More Past Due [Member] | Obligations of state and political subdivisions [Member]
Schedule of past due loans [Abstract]
Total Past Due	$ 0	$ 0

Loans, Impaired Financing Recei

Loans, Impaired Financing Receivable Loan Type (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	$ 10,320	$ 7,415
Accruing loans past due 90 days or more		734	467
TDR loans		6,859	8,279
Increase in accruing loans past due 90 days or more		270
Average 90 days or more past due loan balance		120	90
Agricultural [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	1,670	0
Accruing loans past due 90 days or more		359	0
TDR loans		96	1,710
Commercial and financial [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	1,516	1,498
Accruing loans past due 90 days or more		0	0
TDR loans		787	612
Real Estate: Construction, 1 to 4 family residential [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	173	214
Accruing loans past due 90 days or more		0	0
TDR loans		266	473
Real Estate: Construction, land development and commercial [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	140	145
Accruing loans past due 90 days or more		0	0
TDR loans		120	122
Real Estate: Mortgage, farmland [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	1,272	0
Accruing loans past due 90 days or more		200	0
TDR loans		1,626	2,233
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	3,914	3,845
Accruing loans past due 90 days or more		175	406
TDR loans		1,342	1,369
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	188	279
Accruing loans past due 90 days or more		0	0
TDR loans		26	27
Real Estate: Mortgage, multi-family [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	358	449
Accruing loans past due 90 days or more		0	0
TDR loans		0	0
Real Estate: Mortgage, commercial [Member]
Summary of certain impaired loan information [Abstract]
Non-accrual loans	[1]	1,089	985
Accruing loans past due 90 days or more		0	61
TDR loans		2,596	1,733
Loans to individuals [Member]
Summary of certain impaired loan information [Abstract]
Accruing loans past due 90 days or more		0	0
Troubled Debt Restructuring [Member]
Summary of certain impaired loan information [Abstract]
TDR Loans included within nonaccrual loans		$ 5,020	$ 2,310
[1]	There were $5.02 million and $2.31 million of TDR loans included within nonaccrual loans as of June 30, 2016 and December 31, 2015, respectively.

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016USD ($)contract	Jun. 30, 2016USD ($)contract	Dec. 31, 2015USD ($)contract
Summary of information for TDR loans [Abstract]
Number of contracts | contract		55	50
Recorded investment	$ 11,878	$ 11,878	$ 10,592
Commitments outstanding	$ 317	$ 317	411
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	2	12
Pre-modification recorded investment	$ 1,101	$ 2,754
Post-modification recorded investment	1,101	2,754
Commitments to lend additional borrowings			410
TDR loans default payment		$ 200	$ 0
Agricultural [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		4	7
Recorded investment	1,523	$ 1,523	$ 1,710
Commitments outstanding	$ 65	$ 65	$ 32
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	1	1
Pre-modification recorded investment	$ 562	$ 562
Post-modification recorded investment	562	$ 562
Commercial and Financial [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		12	8
Recorded investment	1,946	$ 1,946	$ 1,818
Commitments outstanding	$ 252	$ 252	$ 241
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	4
Pre-modification recorded investment	$ 0	$ 349
Post-modification recorded investment	0	$ 349
Real Estate: Construction, 1 to 4 family residential [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		2	3
Recorded investment	438	$ 438	$ 646
Commitments outstanding	$ 0	$ 0	$ 138
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	2
Pre-modification recorded investment	$ 0	$ 543
Post-modification recorded investment	0	$ 543
Real Estate: Construction, land development and commercial [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		1	1
Recorded investment	120	$ 120	$ 122
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	0
Pre-modification recorded investment	$ 0	$ 0
Post-modification recorded investment	0	$ 0
Real Estate: Mortgage, farmland [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		7	5
Recorded investment	2,897	$ 2,897	$ 2,233
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	1
Pre-modification recorded investment	$ 0	$ 132
Post-modification recorded investment	0	$ 132
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		13	13
Recorded investment	1,539	$ 1,539	$ 1,575
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	0
Pre-modification recorded investment	$ 0	$ 0
Post-modification recorded investment	0	$ 0
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		2	2
Recorded investment	30	$ 30	$ 36
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	0
Pre-modification recorded investment	$ 0	$ 0
Post-modification recorded investment	0	$ 0
Real Estate: Mortgage, multi-family [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		0	1
Recorded investment	0	$ 0	$ 71
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	1	1
Pre-modification recorded investment	$ 539	$ 539
Post-modification recorded investment	539	$ 539
Real Estate: Mortgage, commercial [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		14	10
Recorded investment	3,385	$ 3,385	$ 2,381
Commitments outstanding	$ 0	$ 0	$ 0
Summary of troubled debt restructuring loans were modified [Abstract]
Number of contracts | contract	0	3
Pre-modification recorded investment	$ 0	$ 629
Post-modification recorded investment	0	$ 629
Loans to individuals [Member]
Summary of information for TDR loans [Abstract]
Number of contracts | contract		0	0
Recorded investment	0	$ 0	$ 0
Commitments outstanding	$ 0	$ 0	$ 0

Loans, Impaired Financing Rec37

Loans, Impaired Financing Receivables Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Recorded Investment
With no related allowance recorded	$ 10,441	$ 10,441	$ 11,288
With an allowance recorded	23,410	23,410	4,973
Total impaired loans	33,851	33,851	16,261
Unpaid Principal Balance
With no related allowance recorded	14,164	14,164	14,840
With an allowance recorded	23,813	23,813	5,355
Total	37,977	37,977	20,195
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	2,096	2,096	883
Total	2,096	2,096	$ 883
Average Recorded Investment
With no related allowance recorded	10,596	10,777
With an allowance recorded	23,579	23,714
Total	34,175	34,491
Interest Income Recognized
With no related allowance recorded	62	125
With an allowance recorded	243	488
Total	$ 305	613
Impaired loans increase		$ 17,590
Percentages of impaired loans to loans held for investment (in hundredths)	1.56%	1.56%	0.76%
Increase in nonaccrual loans		$ 2,910
Decrease in TDR Loans		$ 1,420
Prior period within which impairment is being measured		1 year
Number of period within which average appraisals obtained		1 month
Agricultural and Farmland Real Estate [Member]
Interest Income Recognized
Impaired loans increase		$ 16,390
Agricultural [Member]
Recorded Investment
With no related allowance recorded	$ 50	50	$ 1,609
With an allowance recorded	12,527	12,527	101
Total impaired loans	12,577	12,577	1,710
Unpaid Principal Balance
With no related allowance recorded	195	195	1,773
With an allowance recorded	12,564	12,564	101
Total	12,759	12,759	1,874
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	837	837	1
Total	837	837	1
Average Recorded Investment
With no related allowance recorded	91	97
With an allowance recorded	12,560	12,598
Total	12,651	12,695
Interest Income Recognized
With no related allowance recorded	1	1
With an allowance recorded	140	282
Total	141	283
Commercial and Financial [Member]
Recorded Investment
With no related allowance recorded	1,693	1,693	1,263
With an allowance recorded	610	610	847
Total impaired loans	2,303	2,303	2,110
Unpaid Principal Balance
With no related allowance recorded	2,325	2,325	1,981
With an allowance recorded	623	623	847
Total	2,948	2,948	2,828
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	217	217	324
Total	217	217	324
Average Recorded Investment
With no related allowance recorded	1,722	1,743
With an allowance recorded	643	696
Total	2,365	2,439
Interest Income Recognized
With no related allowance recorded	6	12
With an allowance recorded	5	11
Total	11	23
Real Estate: Construction, 1 to 4 family residential [Member]
Recorded Investment
With no related allowance recorded	265	265	238
With an allowance recorded	173	173	449
Total impaired loans	438	438	687
Unpaid Principal Balance
With no related allowance recorded	265	265	238
With an allowance recorded	184	184	461
Total	449	449	699
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	2	2	9
Total	2	2	9
Average Recorded Investment
With no related allowance recorded	265	265
With an allowance recorded	173	173
Total	438	438
Interest Income Recognized
With no related allowance recorded	3	6
With an allowance recorded	0	0
Total	3	6
Real Estate: Construction, land development and commercial [Member]
Recorded Investment
With no related allowance recorded	205	205	210
With an allowance recorded	55	55	57
Total impaired loans	260	260	267
Unpaid Principal Balance
With no related allowance recorded	292	292	314
With an allowance recorded	57	57	58
Total	349	349	372
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	11	11	13
Total	11	11	13
Average Recorded Investment
With no related allowance recorded	205	208
With an allowance recorded	55	56
Total	260	264
Interest Income Recognized
With no related allowance recorded	1	3
With an allowance recorded	0	0
Total	1	3
Real Estate: Mortgage, farmland [Member]
Recorded Investment
With no related allowance recorded	1,089	1,089	2,233
With an allowance recorded	7,425	7,425	0
Total impaired loans	8,514	8,514	2,233
Unpaid Principal Balance
With no related allowance recorded	1,206	1,206	2,351
With an allowance recorded	7,430	7,430	0
Total	8,636	8,636	2,351
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	638	638	0
Total	638	638	0
Average Recorded Investment
With no related allowance recorded	1,090	1,095
With an allowance recorded	7,498	7,505
Total	8,588	8,600
Interest Income Recognized
With no related allowance recorded	13	26
With an allowance recorded	82	164
Total	95	190
Real Estate: Mortgage, 1 to 4 family first liens [Member]
Recorded Investment
With no related allowance recorded	4,029	4,029	3,558
With an allowance recorded	1,402	1,402	2,062
Total impaired loans	5,431	5,431	5,620
Unpaid Principal Balance
With no related allowance recorded	4,983	4,983	4,419
With an allowance recorded	1,537	1,537	2,156
Total	6,520	6,520	6,575
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	232	232	306
Total	232	232	306
Average Recorded Investment
With no related allowance recorded	4,075	4,136
With an allowance recorded	1,423	1,434
Total	5,498	5,570
Interest Income Recognized
With no related allowance recorded	13	27
With an allowance recorded	5	9
Total	18	36
Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Recorded Investment
With no related allowance recorded	141	141	189
With an allowance recorded	74	74	117
Total impaired loans	215	215	306
Unpaid Principal Balance
With no related allowance recorded	444	444	500
With an allowance recorded	232	232	270
Total	676	676	770
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	14	14	20
Total	14	14	20
Average Recorded Investment
With no related allowance recorded	146	153
With an allowance recorded	76	78
Total	222	231
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	0	1
Total	0	1
Real Estate: Mortgage, multi-family [Member]
Recorded Investment
With no related allowance recorded	146	146	157
With an allowance recorded	212	212	292
Total impaired loans	358	358	449
Unpaid Principal Balance
With no related allowance recorded	258	258	226
With an allowance recorded	220	220	332
Total	478	478	558
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	41	41	58
Total	41	41	58
Average Recorded Investment
With no related allowance recorded	149	187
With an allowance recorded	214	216
Total	363	403
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	0	0
Total	0	0
Real Estate: Mortgage, commercial [Member]
Recorded Investment
With no related allowance recorded	2,823	2,823	1,831
With an allowance recorded	862	862	948
Total impaired loans	3,685	3,685	2,779
Unpaid Principal Balance
With no related allowance recorded	4,176	4,176	3,018
With an allowance recorded	896	896	1,030
Total	5,072	5,072	4,048
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	34	34	52
Total	34	34	52
Average Recorded Investment
With no related allowance recorded	2,853	2,893
With an allowance recorded	868	875
Total	3,721	3,768
Interest Income Recognized
With no related allowance recorded	25	50
With an allowance recorded	9	17
Total	34	67
Loans to individuals [Member]
Recorded Investment
With no related allowance recorded	0	0	0
With an allowance recorded	70	70	100
Total impaired loans	70	70	100
Unpaid Principal Balance
With no related allowance recorded	20	20	20
With an allowance recorded	70	70	100
Total	90	90	120
Related Allowance
With no related allowance recorded	0	0	0
With an allowance recorded	70	70	100
Total	70	70	$ 100
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	69	83
Total	69	83
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	2	4
Total	$ 2	$ 4

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands		Jun. 30, 2016		Dec. 31, 2015
Readily Available Market Prices [Member]
Financial instrument assets:
Cash and cash equivalents		$ 36,614	[1]	$ 35,427	[2]
Investment securities		0	[1]	0	[2]
Loans held for sale		0	[1]	0	[2]
Loans
Agricultural		0	[1]	0	[2]
Commercial and financial		0	[1]	0	[2]
Real estate:
Construction, 1 to 4 family residential		0	[1]	0	[2]
Construction, land development and commercial		0	[1]	0	[2]
Mortgage, farmland		0	[1]	0	[2]
Mortgage, 1 to 4 family first liens		0	[1]	0	[2]
Mortgage, 1 to 4 family junior liens		0	[1]	0	[2]
Mortgage, multi-family		0	[1]	0	[2]
Mortgage, commercial		0	[1]	0	[2]
Loans to individuals		0	[1]	0	[2]
Obligations of state and political subdivisions		0	[1]	0	[2]
Accrued interest receivable		0	[1]	0	[2]
Total financial instrument assets		36,614	[1]	35,427	[2]
Deposits
Noninterest-bearing deposits		0	[1]	0	[2]
Interest-bearing deposits		0	[1]	0	[2]
Other borrowings		0	[1]	0	[2]
Federal Home Loan Bank borrowings		0	[1]	0	[2]
Interest rate swaps	[1]	0
Accrued interest payable		0	[1]	0	[2]
Total financial instrument liabilities		0	[1]	0	[2]
Financial instrument with off-balance sheet risk:
Loan commitments		0	[1]	0	[2]
Letters of credit		0	[1]	0	[2]
Total financial instrument liabilities with off-balance-sheet risk		0	[1]	0	[2]
Observable Market Prices [Member]
Financial instrument assets:
Cash and cash equivalents		0	[3]	0	[4]
Investment securities		260,621	[3]	276,069	[4]
Loans held for sale		7,239	[3]	5,554	[4]
Loans
Agricultural		0	[3]	0	[4]
Commercial and financial		0	[3]	0	[4]
Real estate:
Construction, 1 to 4 family residential		0	[3]	0	[4]
Construction, land development and commercial		0	[3]	0	[4]
Mortgage, farmland		0	[3]	0	[4]
Mortgage, 1 to 4 family first liens		0	[3]	0	[4]
Mortgage, 1 to 4 family junior liens		0	[3]	0	[4]
Mortgage, multi-family		0	[3]	0	[4]
Mortgage, commercial		0	[3]	0	[4]
Loans to individuals		0	[3]	0	[4]
Obligations of state and political subdivisions		0	[3]	0	[4]
Accrued interest receivable		9,601	[3]	8,672	[4]
Total financial instrument assets		277,461	[3]	290,295	[4]
Deposits
Noninterest-bearing deposits		304,155	[3]	314,968	[4]
Interest-bearing deposits		1,593,284	[3]	1,577,684	[4]
Other borrowings		45,132	[3]	44,051	[4]
Federal Home Loan Bank borrowings		239,859	[3]	226,157	[4]
Interest rate swaps		6,611	[3]	4,180
Accrued interest payable		844	[3]	846	[4]
Total financial instrument liabilities		2,189,885	[3]	2,167,886	[4]
Financial instrument with off-balance sheet risk:
Loan commitments		0	[3]	0	[4]
Letters of credit		0	[3]	0	[4]
Total financial instrument liabilities with off-balance-sheet risk		0	[3]	0	[4]
Company Determined Market Prices [Member]
Financial instrument assets:
Cash and cash equivalents		0	[5]	0	[6]
Investment securities		0	[5]	0	[6]
Loans held for sale		0	[5]	0	[6]
Loans
Agricultural		86,173	[5]	98,530	[6]
Commercial and financial		166,286	[5]	179,649	[6]
Real estate:
Construction, 1 to 4 family residential		56,707	[5]	50,487	[6]
Construction, land development and commercial		115,847	[5]	81,705	[6]
Mortgage, farmland		187,578	[5]	184,640	[6]
Mortgage, 1 to 4 family first liens		741,638	[5]	718,566	[6]
Mortgage, 1 to 4 family junior liens		122,980	[5]	122,173	[6]
Mortgage, multi-family		283,577	[5]	272,446	[6]
Mortgage, commercial		316,736	[5]	319,090	[6]
Loans to individuals		23,820	[5]	23,509	[6]
Obligations of state and political subdivisions		50,353	[5]	51,073	[6]
Accrued interest receivable		0	[5]	0	[6]
Total financial instrument assets		2,151,695	[5]	2,101,868	[6]
Deposits
Noninterest-bearing deposits		0	[5]	0	[6]
Interest-bearing deposits		0	[5]	0	[6]
Other borrowings		0	[5]	0	[6]
Federal Home Loan Bank borrowings		0	[5]	0	[6]
Interest rate swaps	[5]	0
Accrued interest payable		0	[5]	0	[6]
Total financial instrument liabilities		0	[5]	0	[6]
Financial instrument with off-balance sheet risk:
Loan commitments		0	[5]	0	[6]
Letters of credit		0	[5]	0	[6]
Total financial instrument liabilities with off-balance-sheet risk		0	[5]	0	[6]
Carrying Amount [Member]
Financial instrument assets:
Cash and cash equivalents		36,614		35,427
Investment securities		260,621		276,069
Loans held for sale		7,239		5,554
Loans
Agricultural		86,132		98,506
Commercial and financial		166,335		179,682
Real estate:
Construction, 1 to 4 family residential		56,738		50,480
Construction, land development and commercial		115,822		81,707
Mortgage, farmland		187,267		184,514
Mortgage, 1 to 4 family first liens		737,242		720,229
Mortgage, 1 to 4 family junior liens		118,063		116,632
Mortgage, multi-family		283,830		270,261
Mortgage, commercial		317,382		320,899
Loans to individuals		23,839		23,518
Obligations of state and political subdivisions		50,815		51,978
Accrued interest receivable		9,601		8,672
Total financial instrument assets		2,457,540		2,424,128
Deposits
Noninterest-bearing deposits		304,155		314,968
Interest-bearing deposits		1,591,853		1,575,734
Other borrowings		45,132		44,051
Federal Home Loan Bank borrowings		240,000		225,000
Interest rate swaps		6,611		4,180
Accrued interest payable		844		846
Total financial instrument liabilities		2,188,595		2,164,779
Financial instrument with off-balance sheet risk:
Loan commitments		420,305		344,602
Letters of credit		9,935		11,718
Total financial instrument liabilities with off-balance-sheet risk		430,240		356,320
Estimated Fair Value [Member]
Financial instrument assets:
Cash and cash equivalents		36,614		35,427
Investment securities		260,621		276,069
Loans held for sale		7,239		5,554
Loans
Agricultural		86,173		98,530
Commercial and financial		166,286		179,649
Real estate:
Construction, 1 to 4 family residential		56,707		50,487
Construction, land development and commercial		115,847		81,705
Mortgage, farmland		187,578		184,640
Mortgage, 1 to 4 family first liens		741,638		718,566
Mortgage, 1 to 4 family junior liens		122,980		122,173
Mortgage, multi-family		283,577		272,446
Mortgage, commercial		316,736		319,090
Loans to individuals		23,820		23,509
Obligations of state and political subdivisions		50,353		51,073
Accrued interest receivable		9,601		8,672
Total financial instrument assets		2,465,770		2,427,590
Deposits
Noninterest-bearing deposits		304,155		314,968
Interest-bearing deposits		1,593,284		1,577,684
Other borrowings		45,132		44,051
Federal Home Loan Bank borrowings		239,859		226,157
Interest rate swaps		6,611		4,180
Accrued interest payable		844		846
Total financial instrument liabilities		2,189,885		2,167,886
Financial instrument with off-balance sheet risk:
Loan commitments		0		0
Letters of credit		0		0
Total financial instrument liabilities with off-balance-sheet risk		$ 0		$ 0
[1]	Considered Level 1 under Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures (“ASC 820”).
[2]	Considered Level 1 under ASC 820.
[3]	Considered Level 2 under ASC 820.
[4]	Considered Level 2 under ASC 820.
[5]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[6]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.

Fair Value Measurements, Assets

Fair Value Measurements, Assets and Liabilities Recurring Basis (Details) - USD ($) $ in Thousands		Jun. 30, 2016		Dec. 31, 2015
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		$ 247,998		$ 264,235
U.S. Treasury [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		25,342		24,978
State and political subdivisions [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		159,341		173,929
Readily Available Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative Financial Instruments	[1]	0
Total		36,614	[1]	35,427	[2]
Observable Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative Financial Instruments		(6,611)	[3]	(4,180)
Total		277,461	[3]	290,295	[4]
Company Determined Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative Financial Instruments	[5]	0
Total		2,151,695	[5]	2,101,868	[6]
Recurring Basis [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Total		241,387		260,055
Recurring Basis [Member] | U.S. Treasury [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		25,342		24,978
Recurring Basis [Member] | State and political subdivisions [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		63,315		173,929
Recurring Basis [Member] | Other securities (FHLB, FHLMC and FNMA) [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale		159,341		65,328
Recurring Basis [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative Financial Instruments		(6,611)		(4,180)
Recurring Basis [Member] | Readily Available Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Total	[7]	0		0
Recurring Basis [Member] | Readily Available Market Prices [Member] | U.S. Treasury [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[7]	0		0
Recurring Basis [Member] | Readily Available Market Prices [Member] | State and political subdivisions [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[7]	0		0
Recurring Basis [Member] | Readily Available Market Prices [Member] | Other securities (FHLB, FHLMC and FNMA) [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[7]	0		0
Recurring Basis [Member] | Observable Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Total	[8]	241,387		260,055
Recurring Basis [Member] | Observable Market Prices [Member] | U.S. Treasury [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[8]	25,342		24,978
Recurring Basis [Member] | Observable Market Prices [Member] | State and political subdivisions [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[8]	63,315		173,929
Recurring Basis [Member] | Observable Market Prices [Member] | Other securities (FHLB, FHLMC and FNMA) [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[8]	159,341		65,328
Recurring Basis [Member] | Observable Market Prices [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative Financial Instruments	[8]	(6,611)		(4,180)
Recurring Basis [Member] | Company Determined Market Prices [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Total	[9]	0		0
Recurring Basis [Member] | Company Determined Market Prices [Member] | U.S. Treasury [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[9]	0		0
Recurring Basis [Member] | Company Determined Market Prices [Member] | State and political subdivisions [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[9]	0		0
Recurring Basis [Member] | Company Determined Market Prices [Member] | Other securities (FHLB, FHLMC and FNMA) [Member]
Summary of assets and liabilities measured at fair value on a recurring basis [Abstract]
Securities available for sale	[9]	$ 0		$ 0
[1]	Considered Level 1 under Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures (“ASC 820”).
[2]	Considered Level 1 under ASC 820.
[3]	Considered Level 2 under ASC 820.
[4]	Considered Level 2 under ASC 820.
[5]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[6]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[7]	Considered Level 1 under ASC 820.
[8]	Considered Level 2 under ASC 820.
[9]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.

Fair Value Measurements, Asse40

Fair Value Measurements, Assets and Liabilities on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016		Jun. 30, 2016		Dec. 31, 2015
Readily Available Market Prices [Member]
Loans
Agricultural	$ 0	[1]	$ 0	[1]	$ 0	[2]
Commercial and financial	0	[1]	0	[1]	0	[2]
Real Estate [Abstract]
Construction, land development and commercial	0	[1]	0	[1]	0	[2]
Mortgage, farmland	0	[1]	0	[1]	0	[2]
Mortgage, 1 to 4 family first liens	0	[1]	0	[1]	0	[2]
Mortgage, 1 to 4 family junior liens	0	[1]	0	[1]	0	[2]
Mortgage, multi-family	0	[1]	0	[1]	0	[2]
Mortgage, commercial	0	[1]	0	[1]	0	[2]
Loans to individuals	0	[1]	0	[1]	0	[2]
Total financial instrument assets	36,614	[1]	36,614	[1]	35,427	[2]
Observable Market Prices [Member]
Loans
Agricultural	0	[3]	0	[3]	0	[4]
Commercial and financial	0	[3]	0	[3]	0	[4]
Real Estate [Abstract]
Construction, land development and commercial	0	[3]	0	[3]	0	[4]
Mortgage, farmland	0	[3]	0	[3]	0	[4]
Mortgage, 1 to 4 family first liens	0	[3]	0	[3]	0	[4]
Mortgage, 1 to 4 family junior liens	0	[3]	0	[3]	0	[4]
Mortgage, multi-family	0	[3]	0	[3]	0	[4]
Mortgage, commercial	0	[3]	0	[3]	0	[4]
Loans to individuals	0	[3]	0	[3]	0	[4]
Total financial instrument assets	277,461	[3]	277,461	[3]	290,295	[4]
Company Determined Market Prices [Member]
Loans
Agricultural	86,173	[5]	86,173	[5]	98,530	[6]
Commercial and financial	166,286	[5]	166,286	[5]	179,649	[6]
Real Estate [Abstract]
Construction, land development and commercial	115,847	[5]	115,847	[5]	81,705	[6]
Mortgage, farmland	187,578	[5]	187,578	[5]	184,640	[6]
Mortgage, 1 to 4 family first liens	741,638	[5]	741,638	[5]	718,566	[6]
Mortgage, 1 to 4 family junior liens	122,980	[5]	122,980	[5]	122,173	[6]
Mortgage, multi-family	283,577	[5]	283,577	[5]	272,446	[6]
Mortgage, commercial	316,736	[5]	316,736	[5]	319,090	[6]
Loans to individuals	23,820	[5]	23,820	[5]	23,509	[6]
Total financial instrument assets	2,151,695	[5]	2,151,695	[5]	2,101,868	[6]
Nonrecurring Basis [Member]
Loans
Agricultural	1,345	[7]	1,345	[7]	1,470	[8]
Commercial and financial	1,480	[7]	1,480	[7]	1,178	[8]
Real Estate [Abstract]
Construction, 1 to 4 family residential	436	[7]	436	[7]	482	[8]
Construction, land development and commercial	129	[7]	129	[7]	132	[8]
Mortgage, farmland	1,972	[7]	1,972	[7]	2,233	[8]
Mortgage, 1 to 4 family first liens	4,609	[7]	4,609	[7]	4,487	[8]
Mortgage, 1 to 4 family junior liens	201	[7]	201	[7]	286	[8]
Mortgage, multi-family	317	[7]	317	[7]	391	[8]
Mortgage, commercial	1,764	[7]	1,764	[7]	1,152	[8]
Loans to individuals	0	[7]	0	[7]	0	[8]
Foreclosed assets	0	[9]	0	[9]	100	[10]
Total financial instrument assets	12,253	[7]	12,253	[7]	11,911
Total Losses	151		511	[7]	1,310
Nonrecurring Basis [Member] | Agricultural [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	116	[8]
Nonrecurring Basis [Member] | Commercial and financial [Member]
Real Estate [Abstract]
Total Losses	72	[7]	92	[7]	56	[8]
Nonrecurring Basis [Member] | Real Estate: Construction, 1 to 4 family residential [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	161	[8]
Nonrecurring Basis [Member] | Real Estate: Construction, land development and commercial [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	35	[8]
Nonrecurring Basis [Member] | Real Estate: Mortgage, farmland [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	0	[8]
Nonrecurring Basis [Member] | Real Estate: Mortgage, 1 to 4 family first liens [Member]
Real Estate [Abstract]
Total Losses	79	[7]	354	[7]	529	[8]
Nonrecurring Basis [Member] | Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	166	[8]
Nonrecurring Basis [Member] | Real Estate: Mortgage, multi-family [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	38	[8]
Nonrecurring Basis [Member] | Real Estate: Mortgage, commercial [Member]
Real Estate [Abstract]
Total Losses		[7]	65	[7]	140	[8]
Nonrecurring Basis [Member] | Loans to individuals [Member]
Real Estate [Abstract]
Total Losses	0	[7]	0	[7]	0	[8]
Nonrecurring Basis [Member] | Foreclosed assets [Member]
Real Estate [Abstract]
Total Losses	0	[9]	0	[9]	69	[10]
Nonrecurring Basis [Member] | Readily Available Market Prices [Member]
Loans
Agricultural	0	[7],[11]	0	[7],[11]	0	[8],[12]
Commercial and financial	0	[7],[11]	0	[7],[11]	0	[8],[12]
Real Estate [Abstract]
Construction, 1 to 4 family residential	0	[7],[11]	0	[7],[11]	0	[8],[12]
Construction, land development and commercial	0	[7],[11]	0	[7],[11]	0	[8],[12]
Mortgage, farmland	0	[7],[11]	0	[7],[11]	0	[8],[12]
Mortgage, 1 to 4 family first liens	0	[7],[11]	0	[7],[11]	0	[8],[12]
Mortgage, 1 to 4 family junior liens	0	[7],[11]	0	[7],[11]	0	[8],[12]
Mortgage, multi-family	0	[7],[11]	0	[7],[11]	0	[8],[12]
Mortgage, commercial	0	[7],[11]	0	[7],[11]	0	[8],[12]
Loans to individuals	0	[7],[11]	0	[7],[11]	0	[8],[12]
Foreclosed assets	0	[9],[11]	0	[9],[11]	0	[10],[12]
Total financial instrument assets	0	[11]	0	[11]	0	[12]
Nonrecurring Basis [Member] | Observable Market Prices [Member]
Loans
Agricultural	0	[7],[13]	0	[7],[13]	0	[8],[14]
Commercial and financial	0	[7],[13]	0	[7],[13]	0	[8],[14]
Real Estate [Abstract]
Construction, 1 to 4 family residential	0	[7],[13]	0	[7],[13]	0	[8],[14]
Construction, land development and commercial	0	[7],[13]	0	[7],[13]	0	[8],[14]
Mortgage, farmland	0	[7],[13]	0	[7],[13]	0	[8],[14]
Mortgage, 1 to 4 family first liens	0	[7],[13]	0	[7],[13]	0	[8],[14]
Mortgage, 1 to 4 family junior liens	0	[7],[13]	0	[7],[13]	0	[8],[14]
Mortgage, multi-family	0	[7],[13]	0	[7],[13]	0	[8],[14]
Mortgage, commercial	0	[7],[13]	0	[7],[13]	0	[8],[14]
Loans to individuals	0	[7],[13]	0	[7],[13]	0	[8],[14]
Foreclosed assets	0	[9],[13]	0	[9],[13]	0	[10],[14]
Total financial instrument assets	0	[7],[13]	0	[7],[13]	0	[14]
Nonrecurring Basis [Member] | Company Determined Market Prices [Member]
Loans
Agricultural	1,345	[7],[15]	1,345	[7],[15]	1,470	[8],[16]
Commercial and financial	1,480	[7],[15]	1,480	[7],[15]	1,178	[8],[16]
Real Estate [Abstract]
Construction, 1 to 4 family residential	436	[7],[15]	436	[7],[15]	482	[8],[16]
Construction, land development and commercial	129	[7],[15]	129	[7],[15]	132	[8],[16]
Mortgage, farmland	1,972	[7],[15]	1,972	[7],[15]	2,233	[8],[16]
Mortgage, 1 to 4 family first liens	4,609	[7],[15]	4,609	[7],[15]	4,487	[8],[16]
Mortgage, 1 to 4 family junior liens	201	[7],[15]	201	[7],[15]	286	[8],[16]
Mortgage, multi-family	317	[7],[15]	317	[7],[15]	391	[8],[16]
Mortgage, commercial	1,764	[7],[15]	1,764	[7],[15]	1,152	[8],[16]
Loans to individuals	0	[7],[15]	0	[7],[15]	0	[8],[16]
Foreclosed assets	0	[9],[15]	0	[9],[15]	100	[10],[16]
Total financial instrument assets	$ 12,253	[7],[15]	$ 12,253	[7],[15]	$ 11,911	[16]
[1]	Considered Level 1 under Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures (“ASC 820”).
[2]	Considered Level 1 under ASC 820.
[3]	Considered Level 2 under ASC 820.
[4]	Considered Level 2 under ASC 820.
[5]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[6]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[7]	Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero.
[8]	Represents carrying value and related write-downs of loans for which adjustments are based on the value of the collateral. The carrying value of loans fully-charged off is zero.
[9]	Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets.
[10]	Represents the fair value and related losses of foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets.
[11]	Considered Level 1 under ASC 820.
[12]	Considered Level 1 under ASC 820.
[13]	Considered Level 2 under ASC 820.
[14]	Considered Level 2 under ASC 820.
[15]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.
[16]	Considered Level 3 under ASC 820 and are based on valuation models that use significant assumptions that are not observable in an active market.

Stock Repurchase Program (Detai

Stock Repurchase Program (Details) - $ / shares	3 Months Ended	6 Months Ended		131 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jul. 26, 2005
Equity [Abstract]
Maximum number of share authorized to repurchase under the program (in shares)					1,500,000
Common stock purchased during the period (in shares)	13,427	48,679	20,031	926,268
Average price per share (in dollars per share)	$ 45.42

Commitments and Contingencies42

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
State and political subdivisions [Member]
Concentration Risk [Line Items]
Investment in securities issued by state and political subdivisions within the state of Iowa	$ 76,480
Home equity loans [Member]
Firm loan commitments and unused portion of lines of credit [Abstract]
Total financial instrument liabilities with off-balance-sheet risk	47,329	$ 44,376
Credit cards [Member]
Firm loan commitments and unused portion of lines of credit [Abstract]
Total financial instrument liabilities with off-balance-sheet risk	43,999	41,518
Commercial, real estate and home construction [Member]
Firm loan commitments and unused portion of lines of credit [Abstract]
Total financial instrument liabilities with off-balance-sheet risk	130,282	98,613
Commercial lines and real estate purchase loan [Member]
Firm loan commitments and unused portion of lines of credit [Abstract]
Total financial instrument liabilities with off-balance-sheet risk	198,695	160,095
Outstanding letters of credit [Member]
Firm loan commitments and unused portion of lines of credit [Abstract]
Total financial instrument liabilities with off-balance-sheet risk	$ 9,935	$ 11,718

Income Taxes (Details)

Income Taxes (Details)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Income Tax Examination [Line Items]
Effective tax rate	30.80%	30.23%
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income tax examination, years under examination	December 31, 2015, 2014, and 2013
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Income tax examination, years under examination	December 31, 2015, 2014, and 2013

Derivative Financial Instrume44

Derivative Financial Instruments (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Nov. 07, 2013USD ($)derivative
Derivatives, Fair Value [Line Items]
Owned and pledged as collateral	$ 6,610,000
Interest Rate Swap 1 [Member] | Interest Expense [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Reclassified from AOCI into Income (Effective Portion)	0	$ 0
Interest Rate Swap 1 [Member] | Other Income [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in Income on Derivatives (Ineffective Portion)	0	0
Interest Rate Swap 1 [Member] | Other Liabilities [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount	25,000,000		$ 25,000,000
Fair Value	$ (2,194,000)
Maturity	Nov. 9, 2020
Interest Rate Swap 1 [Member] | Other Assets [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount		25,000,000
Fair Value		$ (1,501,000)
Maturity		Nov. 9, 2020
Interest Rate Swap 1 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in OCI (Effective Portion)	$ (428,000)	$ (394,000)
Interest Rate Swap 2 [Member] | Interest Expense [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Reclassified from AOCI into Income (Effective Portion)	0	0
Interest Rate Swap 2 [Member] | Other Income [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in Income on Derivatives (Ineffective Portion)	0	0
Interest Rate Swap 2 [Member] | Other Liabilities [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount	25,000,000		$ 25,000,000
Fair Value	$ (4,417,000)
Maturity	Nov. 7, 2023
Interest Rate Swap 2 [Member] | Other Assets [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount		25,000,000
Fair Value		$ (2,679,000)
Maturity		Nov. 7, 2023
Interest Rate Swap 2 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in OCI (Effective Portion)	$ (1,073,000)	$ (461,000)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swaps held | derivative			2
Description of terms	three-month LIBOR
Designated as Hedging Instrument [Member] | Interest Rate Swap 1 [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swaps held | derivative			1