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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) country | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Nov. 01, 2016 USD ($)
Accounting Policies [Abstract] |  |  |  |
Goodwill impairment | $ 0 | $ 0 | $ 0 |
Number of countries in which entity operates | country | 50 |  |  |
Amortization expense for intangible assets | $ 11,400,000 | 3,500,000 | 1,800,000 |
Realized gains (losses) on investments | 2,400,000 | 1,100,000 | (700,000) |
Depreciation expense | 110,700,000 | 110,700,000 | $ 107,200,000 |
Deferred revenue | 4,700,000 | 18,100,000 |  |
Short-term investments | 81,021,000 | 0 |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 211,040,000 | $ 211,063,000 |  |
U.S. Services |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 16,200,000 |  |  |
Tubular Sales |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 2,400,000 |  |  |
Blackhawk |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | $ 192,400,000 |  |  | $ 192,400,000

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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