Basis of Presentation	6 Months Ended
Jun. 30, 2018
Basis of Presentation
Basis of Presentation	Note 1 — Basis of Presentation The accounting and reporting policies of International Bancshares Corporation (the “Corporation”) and Subsidiaries (the Corporation and Subsidiaries collectively referred to herein as the “Company”) conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry. The consolidated financial statements include the accounts of the Corporation and its wholly-owned subsidiaries, International Bank of Commerce, Laredo (“IBC”), Commerce Bank, International Bank of Commerce, Zapata, International Bank of Commerce, Brownsville, International Bank of Commerce, Oklahoma and the Corporation’s wholly-owned non-bank subsidiaries, IBC Subsidiary Corporation, IBC Trading Company, Premier Tierra Holdings, Inc., IBC Charitable and Community Development Corporation, and IBC Capital Corporation. All significant inter-company balances and transactions have been eliminated in consolidation. The consolidated financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company’s latest Annual Report on Form 10-K. The consolidated statement of condition at December 31, 2017 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“US GAAP”) for complete financial statements. Certain reclassifications have been made to make prior periods comparable. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results for the year ending December 31, 2018 or any future period. The Company operates as one segment. The operating information used by the Company’s chief executive officer for purposes of assessing performance and making operating decisions about the Company is the consolidated statements presented in this report. The Company has five active operating subsidiaries, the bank subsidiaries. The Company applies the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), FASB ASC 280, “Segment Reporting,” in determining its reportable segments and related disclosures. The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events. On January 1, 2018, the Company adopted the provisions of ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments – Overall,” which affects current US GAAP as it relates to the accounting for equity investments, financial liability under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 also supersedes the guidance that requires: (i) the classification of equity securities with readily determinable fair values into different categories, and (ii) recognition in changes in fair value of available-for-sale securities in other comprehensive income. The main effect resulting from the adoption of the new standards is that beginning on January 1, 2018, equity securities with readily determinable fair values are now reported in a single line item on the face of the Company’s consolidated statement of condition under the caption, “Equity securities with readily determinable fair values.” Additionally, the changes in fair value of the equity securities is now recognized in net income and is included in other non-interest expense on the face of the Company’s consolidated income statement. Prior to January 1, 2018, the equity securities were classified as available-for-sale and stated at fair value with unrealized gains and losses included in accumulated comprehensive income, net of tax and had a net unrealized loss of $189,000. Other equity securities without readily determinable fair values are recorded at cost less any impairment, if any, and included in other investments in the Company’s consolidated financial statements. On January 1, 2018, the Company adopted the provisions of ASU 2014-09 to ASC 606, “Revenue from Contracts with Customers.” ASC 606 sets a common standard that defines revenue and the principles for recognizing revenue. The core principle of the accounting standards update requires an entity to recognize revenue in a manner that reflects the consideration that an entity is expected to receive in exchange for goods or services as performance obligations are satisfied. The Company’s revenue is primarily comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASC 606. The Company has evaluated the impact of the accounting standards update on certain other non-interest revenue streams that the provisions of the update apply to and has determined that the adoption of the new provisions to ASC 606 did not have a significant impact to the Company’s consolidated financial statements or operations. The Company adopted the provisions of ASU 2018-02 to ASC 220, “Income Statement- Reporting Comprehensive Income” in the second quarter of 2018. ASU 2018-02 amends current guidance surrounding the reclassification of certain tax effects from accumulated other comprehensive income (loss) as a result of the 2017 Tax Cuts and Jobs Act and the related impact to comprehensive income (loss) as a result of the application of existing guidance with respect to changes in tax rates. Under prior guidance, entities were to evaluate the carrying value of deferred tax assets and liabilities and adjust them for the tax effect of the rate change and record that change through earnings. The result is that the tax effects for items that normally would only be recognized in comprehensive income would be recognized through earnings and would result in stranded tax effects in other comprehensive income (loss) for the impact of the rate change. ASU 2018-02 allows for a reclassification from accumulated other comprehensive income (loss) to retained earnings for the stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act. The Company recorded a one-time reclassification of $5,979,000 between accumulated comprehensive income (loss) and retained earnings as a result of the adoption of the accounting standards update.

Note 1 — Basis of Presentation

The accounting and reporting policies of International Bancshares Corporation (the “Corporation”) and Subsidiaries (the Corporation and Subsidiaries collectively referred to herein as the “Company”) conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry. The consolidated financial statements include the accounts of the Corporation and its wholly-owned subsidiaries, International Bank of Commerce, Laredo (“IBC”), Commerce Bank, International Bank of Commerce, Zapata, International Bank of Commerce, Brownsville, International Bank of Commerce, Oklahoma and the Corporation’s wholly-owned non-bank subsidiaries, IBC Subsidiary Corporation, IBC Trading Company, Premier Tierra Holdings, Inc., IBC Charitable and Community Development Corporation, and IBC Capital Corporation. All significant inter-company balances and transactions have been eliminated in consolidation. The consolidated financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company’s latest Annual Report on Form 10-K. The consolidated statement of condition at December 31, 2017 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“US GAAP”) for complete financial statements. Certain reclassifications have been made to make prior periods comparable. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results for the year ending December 31, 2018 or any future period.

The Company operates as one segment. The operating information used by the Company’s chief executive officer for purposes of assessing performance and making operating decisions about the Company is the consolidated statements presented in this report. The Company has five active operating subsidiaries, the bank subsidiaries. The Company applies the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), FASB ASC 280, “Segment Reporting,” in determining its reportable segments and related disclosures.

The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events.

On January 1, 2018, the Company adopted the provisions of ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments – Overall,” which affects current US GAAP as it relates to the accounting for equity investments, financial liability under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 also supersedes the guidance that requires: (i) the classification of equity securities with readily determinable fair values into different categories, and (ii) recognition in changes in fair value of available-for-sale securities in other comprehensive income. The main effect resulting from the adoption of the new standards is that beginning on January 1, 2018, equity securities with readily determinable fair values are now reported in a single line item on the face of the Company’s consolidated statement of condition under the caption, “Equity securities with readily determinable fair values.” Additionally, the changes in fair value of the equity securities is now recognized in net income and is included in other non-interest expense on the face of the Company’s consolidated income statement. Prior to January 1, 2018, the equity securities were classified as available-for-sale and stated at fair value with unrealized gains and losses included in accumulated comprehensive income, net of tax and had a net unrealized loss of $189,000. Other equity securities without readily determinable fair values are recorded at cost less any impairment, if any, and included in other investments in the Company’s consolidated financial statements.

On January 1, 2018, the Company adopted the provisions of ASU 2014-09 to ASC 606, “Revenue from Contracts with Customers.” ASC 606 sets a common standard that defines revenue and the principles for recognizing revenue. The core principle of the accounting standards update requires an entity to recognize revenue in a manner that reflects the consideration that an entity is expected to receive in exchange for goods or services as performance obligations are satisfied. The Company’s revenue is primarily comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASC 606. The Company has evaluated the impact of the accounting standards update on certain other non-interest revenue streams that the provisions of the update apply to and has determined that the adoption of the new provisions to ASC 606 did not have a significant impact to the Company’s consolidated financial statements or operations.

The Company adopted the provisions of ASU 2018-02 to ASC 220, “Income Statement- Reporting Comprehensive Income” in the second quarter of 2018. ASU 2018-02 amends current guidance surrounding the reclassification of certain tax effects from accumulated other comprehensive income (loss) as a result of the 2017 Tax Cuts and Jobs Act and the related impact to comprehensive income (loss) as a result of the application of existing guidance with respect to changes in tax rates. Under prior guidance, entities were to evaluate the carrying value of deferred tax assets and liabilities and adjust them for the tax effect of the rate change and record that change through earnings. The result is that the tax effects for items that normally would only be recognized in comprehensive income would be recognized through earnings and would result in stranded tax effects in other comprehensive income (loss) for the impact of the rate change. ASU 2018-02 allows for a reclassification from accumulated other comprehensive income (loss) to retained earnings for the stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act. The Company recorded a one-time reclassification of $5,979,000 between accumulated comprehensive income (loss) and retained earnings as a result of the adoption of the accounting standards update.