Basis of Presentation	3 Months Ended
Mar. 31, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation Builders FirstSource, Inc., a Delaware corporation formed in 1998, is a leading supplier and manufacturer of building materials, manufactured components and construction services to professional homebuilders, sub-contractors, remodelers and consumers. The Company operates approximately 565 locations in 42 states across the United States. In this quarterly report, references to the “Company,” “we,” “our,” “ours” or “us” refer to Builders FirstSource, Inc. and its consolidated subsidiaries unless otherwise stated or the context otherwise requires. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. Intercompany transactions are eliminated in consolidation. The condensed consolidated balance sheet as of December 31, 2021 is derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. This condensed consolidated balance sheet as of December 31, 2021 and the unaudited condensed consolidated financial statements included herein should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 31, 2021 included in our most recent annual report on Form 10-K (“Form 10-K”). Accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in our Form 10-K. The accounting policies of our operating segments are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in our Form 10-K. Since the Company operates in one reportable segment, the primary measures reviewed by our CEO, whom we have determined to be our chief operating decision maker, including revenue, gross margin and income before income taxes, are shown in these condensed consolidated financial statements. Comprehensive Income Comprehensive income is equal to net income for all periods presented. Reclassifications Certain prior periods’ amounts have been reclassified to conform to the current year presentation, including presenting contract assets and contract liabilities separately on the face of the financial statements, whereas, these contract assets and contract liabilities had previously been presented as a component of accounts receivable and accrued liabilities, respectively. These reclassifications had no impact on net income, total assets and liabilities, stockholders’ equity, or cash flows as previously reported. We have changed the composition of our product categories, resulting in a decrease to four product categories. As a result of this change, prior period amounts have been reclassified to conform to the current year presentation. Recent Accounting Pronouncements In October 2021, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers which intends to address diversity and inconsistency in the accounting related to recognition of an acquired contract liability and payment terms and their effect on subsequent revenue recognized by the acquirer. This standard is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a material impact on our consolidated financial statements. In March 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-04, Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The purpose of ASU 2020-04 is to provide optional guidance for a period of time related to accounting for reference rate reform on financial reporting. It is intended to reduce the potential burden of reviewing contract modifications related to discontinued rates. The amendments and optional expedients in this update are effective, as elected, beginning March 12, 2020 through December 31, 2022 and may be elected by topic. We have not elected adoption of this optional guidance and do not intend to elect this guidance before the sunset date of December 31, 2022, as there is no material impact on our consolidated financial statements.

Basis of Presentation

3 Months Ended

Mar. 31, 2022

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. Basis of Presentation

Builders FirstSource, Inc., a Delaware corporation formed in 1998, is a leading supplier and manufacturer of building materials, manufactured components and construction services to professional homebuilders, sub-contractors, remodelers and consumers. The Company operates approximately 565 locations in 42 states across the United States. In this quarterly report, references to the “Company,” “we,” “our,” “ours” or “us” refer to Builders FirstSource, Inc. and its consolidated subsidiaries unless otherwise stated or the context otherwise requires.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. Intercompany transactions are eliminated in consolidation.

The condensed consolidated balance sheet as of December 31, 2021 is derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. This condensed consolidated balance sheet as of December 31, 2021 and the unaudited condensed consolidated financial statements included herein should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 31, 2021 included in our most recent annual report on Form 10-K (“Form 10-K”). Accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in our Form 10-K.

The accounting policies of our operating segments are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in our Form 10-K. Since the Company operates in one reportable segment, the primary measures reviewed by our CEO, whom we have determined to be our chief operating decision maker, including revenue, gross margin and income before income taxes, are shown in these condensed consolidated financial statements.

Comprehensive Income

Comprehensive income is equal to net income for all periods presented.

Reclassifications

Certain prior periods’ amounts have been reclassified to conform to the current year presentation, including presenting contract assets and contract liabilities separately on the face of the financial statements, whereas, these contract assets and contract liabilities had previously been presented as a component of accounts receivable and accrued liabilities, respectively. These reclassifications had no impact on net income, total assets and liabilities, stockholders’ equity, or cash flows as previously reported. We have changed the composition of our product categories, resulting in a decrease to four product categories. As a result of this change, prior period amounts have been reclassified to conform to the current year presentation.

Recent Accounting Pronouncements

In October 2021, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers which intends to address diversity and inconsistency in the accounting related to recognition of an acquired contract liability and payment terms and their effect on subsequent revenue recognized by the acquirer. This standard is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a material impact on our consolidated financial statements.

In March 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-04, Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The purpose of ASU 2020-04 is to provide optional guidance for a period of time related to accounting for reference rate reform on financial reporting. It is intended to reduce the potential burden of reviewing contract modifications related to discontinued rates. The amendments and optional expedients in this update are effective, as elected, beginning March 12, 2020 through December 31, 2022 and may be elected by topic. We have not elected adoption of this optional guidance and do not intend to elect this guidance before the sunset date of December 31, 2022, as there is no material impact on our consolidated financial statements.