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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) country | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 01, 2019 USD ($) | Nov. 01, 2016 USD ($)
Accounting Policies [Abstract] |  |  |  |  |
Income (loss) on changes in the cash surrender value of life insurance policies | $ (1,200,000) | $ 2,400,000 | $ 1,100,000 |  |
Number of countries in which entity operates | country | 50 |  |  |  |
Amortization expense for intangible assets | $ 10,800,000 | 11,400,000 | 3,500,000 |  |
Depreciation expense | 100,500,000 | 110,700,000 | 110,700,000 |  |
Short-term investments | 26,603,000 | 81,021,000 |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill impairment | 0 | 0 | $ 0 |  |
Goodwill | 211,040,000 | $ 211,040,000 |  |  |
Blackhawk |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Bonus and medical claim expenses | 4,500,000 |  |  |  |
Goodwill | 192,400,000 |  |  |  | $ 192,400,000
U.S. Services |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | 16,200,000 |  |  |  |
Tubular Sales |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 2,400,000 |  |  |  |
Minimum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Payment term | 30 days |  |  |  |
Maximum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Payment term | 120 days |  |  |  |
Scenario, Forecast | Accounting Standards Update 2016-02 | Minimum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Operating lease, right-of-use asset |  |  |  | $ 30,000,000 |
Operating lease, liability |  |  |  | 30,000,000 |
Scenario, Forecast | Accounting Standards Update 2016-02 | Maximum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Operating lease, right-of-use asset |  |  |  | 40,000,000 |
Operating lease, liability |  |  |  | $ 40,000,000 |

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