Basis of Presentation	6 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) that permit reduced disclosure for interim periods. The condensed consolidated balance sheet as of December 31, 2016 was derived from audited financial statements, but does not include all necessary disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include all accounts of the Company and its subsidiaries and, in the opinion of management, 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. These unaudited financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 (“2016 Annual Report on Form 10-K”). 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. All material intercompany accounts and transactions have been eliminated in consolidation. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation. Comprehensive income Comprehensive income is equal to the net income for all periods presented. Recently adopted accounting pronouncements In July 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”). ASU 2015-11 requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value. Prior to the issuance of the standard, inventory was measured at the lower of cost or market, where market was defined as replacement cost, with a ceiling of net realizable value and floor of net realizable value less a normal profit margin. Inventory measured using last-in, first-out (LIFO) and the retail inventory method are not impacted by the new guidance. Prospective application is required and early adoption is permitted. ASU 2015-11 became effective for the Company’s annual and interim periods beginning on January 1, 2017. The adoption of the guidance did not have a material impact on our financial statements. Recently issued accounting pronouncements not yet adopted In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), and issued subsequent amendments to the initial guidance within Accounting Standards Update 2016-08, Revenue from Contracts with Customers, Principal versus Agent Considerations (“ASU 2016-08”) issued in March 2016, Accounting Standards Update 2016-10, Revenue from Contracts with Customers, Identifying Performance Obligations and Licensing (“ASU 2016-10”) issued in April 2016, Accounting Standards Update 2016-12, Revenue from Contracts with Customers, Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”) issued in May 2016 and Accounting Standards Update 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers (“ASU 2016-20”) issued in December 2016 (ASU 2014-09, ASU 2016-08, ASU 2016-10, ASU 2016-12 and ASU 2016-20 collectively “Topic 606”). Topic 606 provides a comprehensive revenue recognition model requiring companies to recognize revenue for the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. In July 2015, the FASB voted to defer the effective date of ASU 2014-09 by one year, and therefore, the standard is effective for the Company’s annual and interim periods beginning on January 1, 2018. The guidance permits the use of either a full retrospective or modified retrospective transition method. We expect to adopt the standard on January 1, 2018 using the modified retrospective transition method, which recognizes the cumulative effect of initially applying the standard in retained earnings on the date of adoption, with the option to utilize certain practical expedients as defined in Topic 606. We are continuing to evaluate the impact of the standard on our financial statements, but based on our preliminary assessment, we believe that contracts with a service element may be impacted as we identify the promised goods and services (performance obligations) within our construction services contracts, which could impact the timing of revenue recognition. Currently, we expect the timing of revenue recognition for our building products contracts to be similar to the current timing. We also continue to evaluate the disclosure requirements of the standard, which are expected to be significant and incremental to the current disclosures. As we continue to evaluate the standard and finalize our assessment, our current conclusions are subject to change. In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (“ASU 2016-02”). The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for the Company’s annual and interim periods beginning on January 1, 2019. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are in the process of evaluating the impact of the standard on our financial statements. As a lessee, certain of our various leases under existing guidance are classified as operating leases that are not recorded on the balance sheet but are recorded in the statement of operations as expense is incurred. Upon adoption of the standard, we will be required to record substantially all leases on the balance sheet as a ROU asset and a lease liability. The timing of expense recognition and classification in the statement of operations could change based on the classification of leases as either operating or financing. In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 was issued to decrease the diversity in practice of how certain cash receipts and cash payments are presented and classified in the statement of cash flows by providing guidance on eight specific cash flow issues. ASU 2016-15 is effective for the Company’s annual and interim periods beginning on January 1, 2018, with early adoption permitted and retrospective application required. The adoption of the standard is not expected to have a material impact on our financial statements. In November 2016, the FASB issued Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”). ASU 2016-18 requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown and that the statement of cash flows explain the changes in restricted cash during the period. ASU 2016-18 is effective for the Company's annual and interim periods beginning on January 1, 2018. Retrospective application is required and early adoption is permitted. The adoption of the standard is not expected to have a material impact on our financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides guidance in determining when a set of assets and activities meets the definition of a business. ASU 2017-01 is effective for the Company's annual and interim periods beginning on January 1, 2018. Early application is permitted for transactions meeting certain criteria and prospective application is required. The adoption of the standard is not expected to have a material impact on our financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires computation of the implied fair value of a reporting unit's goodwill. The amount of a goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for the Company's annual goodwill impairment test and any interim tests during the Company's annual and interim periods beginning on January 1, 2020. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. Prospective application is required. The adoption of the standard is not expected to have a material impact on our financial statements. In February 2017, the FASB issued Accounting Standards Update 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets (“ASU 2017-05”). ASU 2017-05 clarifies the scope of Subtopic 610-20, which provides guidance for recognizing gains and losses from the sale or transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also provides guidance for partial sales of nonfinancial assets. ASU 2017-05 is effective for the Company’s annual and interim periods beginning on January 1, 2018 and we are required to adopt ASU 2017-05 at the same time that we adopt ASU 2014-09. The guidance permits the use of either a retrospective or cumulative effect transition method. We are evaluating the impact of the standard on our financial statements. In May 2017, the FASB issued Accounting Standards Update 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting under ASC 718. ASU 2017-09 is effective for the Company’s annual and interim periods beginning on January 1, 2018, with early adoption permitted. ASU 2017-09 is to be applied prospectively to an award modified on or after the adoption date. The adoption of the standard is not expected to have a material impact on our financial statements.

Basis of Presentation

The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) that permit reduced disclosure for interim periods. The condensed consolidated balance sheet as of December 31, 2016 was derived from audited financial statements, but does not include all necessary disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include all accounts of the Company and its subsidiaries and, in the opinion of management, 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. These unaudited financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 (“2016 Annual Report on Form 10-K”). 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. All material intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Certain prior year amounts have been reclassified to conform to the current year presentation.

Comprehensive income

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

Recently adopted accounting pronouncements

In July 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”). ASU 2015-11 requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value. Prior to the issuance of the standard, inventory was measured at the lower of cost or market, where market was defined as replacement cost, with a ceiling of net realizable value and floor of net realizable value less a normal profit margin. Inventory measured using last-in, first-out (LIFO) and the retail inventory method are not impacted by the new guidance. Prospective application is required and early adoption is permitted. ASU 2015-11 became effective for the Company’s annual and interim periods beginning on January 1, 2017. The adoption of the guidance did not have a material impact on our financial statements.

Recently issued accounting pronouncements not yet adopted

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), and issued subsequent amendments to the initial guidance within Accounting Standards Update 2016-08, Revenue from Contracts with Customers, Principal versus Agent Considerations (“ASU 2016-08”) issued in March 2016, Accounting Standards Update 2016-10, Revenue from Contracts with Customers, Identifying Performance Obligations and Licensing (“ASU 2016-10”) issued in April 2016, Accounting Standards Update 2016-12, Revenue from Contracts with Customers, Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”) issued in May 2016 and Accounting Standards Update 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers (“ASU 2016-20”) issued in December 2016 (ASU 2014-09, ASU 2016-08, ASU 2016-10, ASU 2016-12 and ASU 2016-20 collectively “Topic 606”). Topic 606 provides a comprehensive revenue recognition model requiring companies to recognize revenue for the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. In July 2015, the FASB voted to defer the effective date of ASU 2014-09 by one year, and therefore, the standard is effective for the Company’s annual and interim periods beginning on January 1, 2018. The guidance permits the use of either a full retrospective or modified retrospective transition method. We expect to adopt the standard on January 1, 2018 using the modified retrospective transition method, which recognizes the cumulative effect of initially applying the standard in retained earnings on the date of adoption, with the option to utilize certain practical expedients as defined in Topic 606. We are continuing to evaluate the impact of the standard on our financial statements, but based on our preliminary assessment, we believe that contracts with a service element may be impacted as we identify the promised goods and services (performance obligations) within our construction services contracts, which could impact the timing of revenue recognition. Currently, we expect the timing of revenue recognition for our building products contracts to be similar to the current timing. We also continue to evaluate the disclosure requirements of the standard, which are expected to be significant and incremental to the current disclosures. As we continue to evaluate the standard and finalize our assessment, our current conclusions are subject to change.

In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (“ASU 2016-02”). The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for the Company’s annual and interim periods beginning on January 1, 2019. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are in the process of evaluating the impact of the standard on our financial statements. As a lessee, certain of our various leases under existing guidance are classified as operating leases that are not recorded on the balance sheet but are recorded in the statement of operations as expense is incurred. Upon adoption of the standard, we will be required to record substantially all leases on the balance sheet as a ROU asset and a lease liability. The timing of expense recognition and classification in the statement of operations could change based on the classification of leases as either operating or financing.

In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 was issued to decrease the diversity in practice of how certain cash receipts and cash payments are presented and classified in the statement of cash flows by providing guidance on eight specific cash flow issues. ASU 2016-15 is effective for the Company’s annual and interim periods beginning on January 1, 2018, with early adoption permitted and retrospective application required. The adoption of the standard is not expected to have a material impact on our financial statements.

In November 2016, the FASB issued Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”). ASU 2016-18 requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown and that the statement of cash flows explain the changes in restricted cash during the period. ASU 2016-18 is effective for the Company's annual and interim periods beginning on January 1, 2018. Retrospective application is required and early adoption is permitted. The adoption of the standard is not expected to have a material impact on our financial statements.

In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides guidance in determining when a set of assets and activities meets the definition of a business. ASU 2017-01 is effective for the Company's annual and interim periods beginning on January 1, 2018. Early application is permitted for transactions meeting certain criteria and prospective application is required. The adoption of the standard is not expected to have a material impact on our financial statements.

In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires computation of the implied fair value of a reporting unit's goodwill. The amount of a goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for the Company's annual goodwill impairment test and any interim tests during the Company's annual and interim periods beginning on January 1, 2020. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. Prospective application is required. The adoption of the standard is not expected to have a material impact on our financial statements.

In February 2017, the FASB issued Accounting Standards Update 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets (“ASU 2017-05”). ASU 2017-05 clarifies the scope of Subtopic 610-20, which provides guidance for recognizing gains and losses from the sale or transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also provides guidance for partial sales of nonfinancial assets. ASU 2017-05 is effective for the Company’s annual and interim periods beginning on January 1, 2018 and we are required to adopt ASU 2017-05 at the same time that we adopt ASU 2014-09. The guidance permits the use of either a retrospective or cumulative effect transition method. We are evaluating the impact of the standard on our financial statements.

In May 2017, the FASB issued Accounting Standards Update 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting under ASC 718. ASU 2017-09 is effective for the Company’s annual and interim periods beginning on January 1, 2018, with early adoption permitted. ASU 2017-09 is to be applied prospectively to an award modified on or after the adoption date. The adoption of the standard is not expected to have a material impact on our financial statements.