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Acquisitions - Additional Information (Details) - USD ($) |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 19, 2020 | Jul. 31, 2019 | Jan. 07, 2019 | May 31, 2018 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 87,800,000 | $ 88,300,000 | $ 37,400,000
Goodwill |  |  |  |  | $ 1,261,978,000 |  |  |  | $ 1,047,425,000 |  |  |  | 1,261,978,000 | 1,047,425,000 | 736,938,000
Revenues |  |  |  |  | $ 964,258,000 | $ 1,004,236,000 | $ 979,459,000 | $ 970,993,000 | 1,037,388,000 | $ 1,023,277,000 | $ 989,742,000 | $ 904,405,000 | 3,918,946,000 | 3,954,812,000 | 3,560,508,000
Polaris Alpha |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest acquired |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Cash paid to acquire |  |  |  | $ 489,100,000 |  |  |  |  |  |  |  |  |  |  |
Borrowed under credit agreement to partially fund the acquisition |  |  |  | 260,000,000 |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 45,500,000 | 54,500,000 | 30,300,000
Goodwill |  |  |  | $ 243,471,000 |  |  |  |  |  |  |  |  |  |  |
Goodwill deductible for tax purposes |  |  |  |  |  |  |  |  | $ 50,100,000 |  |  |  |  | 50,100,000 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 227,300,000
Polaris Alpha | Indirect, General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,200,000
OGSystems |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest acquired |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Cash paid to acquire |  |  | $ 292,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Borrowed under credit agreement to partially fund the acquisition |  |  | 110,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 23,800,000 | 23,800 |
Goodwill |  |  | 183,540,000 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill deductible for tax purposes |  |  | 16,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  | 143,400,000 |
OGSystems | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowed under credit agreement to partially fund the acquisition |  |  | $ 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |
OGSystems | Indirect, General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |
QRC Technologies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest acquired |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid to acquire |  | $ 214,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 14,000.0 | 5,700,000 |
Goodwill |  | 125,091,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,200,000 |
QRC Technologies | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowed under credit agreement to partially fund the acquisition |  | 140,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |
QRC Technologies | Indirect, General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related expenses |  | $ 4,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Braxton |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid to acquire | $ 310,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |
Goodwill | 213,477,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill deductible for tax purposes | $ 195,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Braxton | Indirect, General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,500,000 |  |

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