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Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Percent of employees covered by collective bargaining agreements | 34.00% |  |
Contributions | $ 167,399 | $ 132,996 | $ 121,978
Percentage of contribution by employer of each employee's contribution up to 3% | 100.00% |  |
Percentage of contribution by employer of each employee who contributes between 3% and 6% | 50.00% |  |
Contributions to Quanta 401(k) Plan | $ 61,700 | 50,700 | 45,900
Contributions to the deferred compensation plans | 1,500 | 1,400 | 1,300
Discretionary contributions | 0 | 0 | 0
Deferred compensation obligations included in other long-term liabilities | 67,400 | 74,200 |
Investments in company-owned life insurance policies | 64,000 | 73,800 |
Increase (decrease) to fair market value of plan liabilities | 13,192 | (10,428) | (7,507)
Increase (decrease) to fair market value of plan assets | $ (13,757) | 8,566 | 6,857
Minimum |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Percentage of employee contribution, lower range | 3.00% |  |
Maximum |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Percentage of employee contribution, lower range | 6.00% |  |
Multiemployer Defined Contribution and Other Benefit Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Contributions | $ 234,300 | $ 213,400 | $ 188,600

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- Definition Defined Contribution Plan, Employer Matching Contribution, Percent of Match By Employer Up To Specific Percentage + References No definition available. + Details
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- Definition Defined Contribution Plan, Employer Matching Contribution, Percent of Match By Employer Of Each Employee Who Contributes To Plan + References No definition available. + Details
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- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. + References No definition available. + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 30 -Section 25 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6384206&loc=d3e41899-111602 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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