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Subsequent Events | 12 Months Ended
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Dec. 31, 2019
Subsequent Events [Abstract] |
Subsequent Events [Text Block] | Subsequent Events On February 3, 2020, the Company acquired PerLectric, Inc., a leading electrical construction company in Fairfax, Virginia, which will be included in the Company's construction services segment. On February 14, 2020, the Company acquired the assets of Oldcastle Infrastructure Spokane, a prestressed-concrete business located in Spokane, Washington, which will be included in the Company's construction materials and contracting segment. To date, the initial accounting for these acquisitions is incomplete. Due to the limited time since the date of these acquisitions, it is impracticable for the Company to make business combination disclosures related to these acquisitions. The Company is still gathering the necessary information to provide such disclosures in future filings.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -URI http://asc.fasb.org/topic&trid=2122774 + Details
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