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Basis of Presentation (Policies) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Principles of Consolidation | Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of Simpson Manufacturing Co., Inc. and its subsidiaries (collectively, the “Company”). Investments in 50% or less owned entities are accounted for using either cost or the equity method. All significant intercompany transactions have been eliminated. |
Use of Estimates, Policy | Use of Estimates The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Management believes that these consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation under GAAP. We assessed certain accounting matters that require the use of estimates and assumptions in context with the known and projected future impacts of COVID-19. The Company's actual results could differ materially from those estimates. |
Interim Period Reporting | Interim Reporting Period The accompanying unaudited quarterly condensed consolidated financial statements have been prepared pursuant to the rules and regulations for reporting on Form 10-Q. Accordingly, certain information and footnotes required by GAAP have been condensed or omitted. These interim statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (the “2020 Form 10-K”). The unaudited quarterly condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, contain all adjustments (consisting of only normal recurring adjustments) necessary to state fairly the financial information set forth therein in accordance with GAAP. Certain prior period amounts in the condensed consolidated financial statements and the accompanying notes have been reclassified to conform to the current period’s presentation. The year-end condensed consolidated balance sheet data provided herein were derived from audited financial statements included in the 2020 Form 10-K, but do not include all disclosures required by GAAP. The Company’s quarterly results fluctuate. As a result, the Company believes the results of operations for this interim period presented are not indicative of the results to be expected for any future periods. |
Revenue Recognition | Revenue Recognition Generally, the Company’s revenue contract with a customer exists when goods are shipped, and services (if any) are rendered; and its related invoice is generated. The duration of the contract does not extend beyond the promised goods or services already transferred. The transaction price of each distinct promised product or service specified in the invoice is based on its relative stated standalone selling price. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product to a customer at a point in time. The Company’s shipping terms provide the primary indicator of the transfer of control. The Company’s general shipping terms are F.O.B. shipping point, where title and risk and rewards of ownership transfer at the point when the products leave the Company’s warehouse. The Company recognizes revenue based on the consideration specified in the invoice with a customer, excluding any sales incentives, discounts, and amounts collected on behalf of third parties (i.e., governmental tax authorities). Based on historical experience with the customer, the customer's purchasing pattern and its significant experience selling products, the Company concluded that a significant reversal in the cumulative amount of revenue recognized will not occur when the uncertainty (if any) is resolved (that is, when the total amount of purchases is known). Refer to Note 2 for additional information. |
Net Income Per Common Share | Net Income Per Common Share The Company calculates net income per common share based on the weighted-average number of shares of the Company's common stock outstanding during the period. Potentially dilutive securities are included in the diluted per-share calculations using the treasury stock method for all periods when the effect is dilutive. |
Accounting for Leases | Accounting for Leases The Company has operating leases for certain facilities, equipment, and autos. As an accounting policy for short-term leases, the Company elected to not recognize the right-of-use asset and liability, if, at the commencement date, the lease (1) has a term of 12 months or less and (2) does not include renewal and purchase options that the Company is reasonably certain to exercise. Monthly payments on short-term leases are recognized on the straight-line basis over the full lease term. |
Accounting for Stock-Based Compensation | Accounting for Stock-Based Compensation The Company recognizes stock-based compensation expense related to the estimated fair value of restricted stock awards on a straight-line basis, net of estimated forfeitures, over the requisite service period of the awards, which is generally the vesting term of four years. Stock-based expense related to performance share grants are measured based on grant date fair value and expensed on a graded basis over the service period of the awards, which is generally a performance period of three years. The performance conditions are based on the Company's achievement of revenue growth and return on invested capital over the performance period, and are evaluated for the probability of vesting at each reporting period end with changes in expected results recognized as an adjustment to expense. The assumptions used to calculate the fair value of restricted stock grants are evaluated and revised, as necessary, to reflect market conditions and the Company’s experience. |
Equity Investments |  |
Fair Value of Financial Instruments | Fair Value of Financial Instruments Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified under a three-tier fair valuation hierarchy based on the observability of the inputs available in the market: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and Level 3 inputs are unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The carrying amounts of trade accounts receivable, accounts payable, accrued liabilities and other current liabilities approximate fair value due to the short-term nature of these instruments. The fair value of the Company’s contingent consideration related to acquisitions and equity investment are classified as Level 3 within the fair value hierarchy as it is based on unobserved inputs such as management estimates and entity-specific assumptions and is evaluated on an ongoing basis. The fair value of foreign currency forward contracts, calculated based on Level 1 inputs, was not material as of June 30, 2021. |
Derivative Instruments - Foreign Currency Contracts |  | Derivative Instruments - Foreign Currency Contracts The Company uses derivative instruments as a risk management tool to mitigate the potential impact of certain market risks. Foreign currency exchange rate risk is the primary market risk the Company manages through the use of derivative instruments, which are accounted for as cash flow hedges under the accounting standards and carried at fair value as other current assets or other current liabilities in the consolidated balance sheets. Net deferred gains and losses related to changes in fair value are included in accumulated other comprehensive loss, a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. Changes in fair value of any derivatives that are determined to be ineffective are immediately reclassified from other comprehensive income into earnings. The cash flow impact of the Company's derivative instruments is primarily included in the consolidated statement of cash flows in net cash provided by operating activities. Refer to Note 8.
Cash and Cash Equivalents |  | Cash and Cash EquivalentsThe Company classifies investments that are highly liquid and have maturities of three months or less at the date of purchase as cash equivalents. As of June 30, 2021 and 2020, the value of these investments were $57.1 million and $76.9 million, respectively, consisting of U.S. Treasury securities and money market funds. The value of the investments is based on cost, which approximates fair value based on Level 1 inputs
Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy | Current Estimated Credit Loss - Allowance for doubtful accounts The Company maintains an allowance for doubtful accounts receivable for estimated future expected credit losses resulting from customers' failure to make payments on its accounts receivable. The Company determines the estimate of the allowance for doubtful accounts receivable by considering several factors, including (1) specific information on the financial condition and the current creditworthiness of customers, (2) credit rating, (3) payment history and historical experience, (4) aging of the accounts receivable, and (5) reasonable and supportable forecasts about collectability. The Company also reserves 100% of the amounts deemed uncollectible due to a customer's deteriorating financial condition or bankruptcy. Every quarter, the Company evaluates the customer group using the accounts receivable aging report and its best judgment when considering changes in customers' credit ratings, level of delinquency, customers' historical payments and loss experience, current market and economic conditions, and expectations of future market and economic conditions. The changes in the allowance for doubtful accounts receivable for the year ended June 30, 2021 are outlined in the table below:
| Balance at |  |  | Balance at
(in thousands) | December 31, 2020 | Expense (Deductions), net | Write-Offs 1 | June 30, 2021
Allowance for Doubtful Accounts | $ | 2,110 |  | (377) |  | 287 |  | $ | 1,446 |
1 Amount is net of recoveries and the effect of foreign currency fluctuations for the year ended June 30, 2021. |
Income Taxes | Income Taxes The Company uses an estimated annual tax rate to measure the tax benefit or tax expense recognized in each interim period. |
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted | Accounting Standards Not Yet Adopted In March 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848). ASU 2020-04 provides optional guidance to ease the potential burden in accounting for reference rate reform on financial reporting in response to the risk of cessation of the London Interbank Offered Rate (“LIBOR”) on December 31, 2021. The ASU allows the option to account for and present a modification that meets the scope of the standard as an event that does not require contract remeasurement at the modification date or reassessment of a previous accounting determination required under the relevant topic or subtopic. Entities are permitted to apply the amendments to all contracts, cash flow and net investment hedge relationships that exist as of March 12, 2020. The relief provided in this ASU is only available for a limited time, generally through December 31, 2022. The Company's primary credit facility is the $300 million revolving line of credit (the "Credit Facility") with Wells Fargo Bank, which matures on July 12, 2026. Borrowings under the Credit Facility bear interest using LIBOR plus an applicable margin. The Credit Facility currently includes a provision for the determination of a successor LIBOR rate or an alternative rate of interest. On March 5, 2021, ICE Benchmark Administration, the administrator of the LIBOR and the Financial Conduct Authority, announced some USD LIBOR tenors (overnight, 1 month, 3 month, and 12 month) will continue to be published until June 30, 2023. We do not expect a material impact to our consolidated operating results, financial position or cash flow from the transition from LIBOR to alternative reference interest rates, but we will continue to monitor the impact of the transition until it is completed. All issued and effective accounting standards during the second quarter of 2021 were determined to be not relevant or material to the Company. |

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