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Summary of Significant Accounting Policies (Goodwill and Other Intangibles) - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) Reporting_Unit | Dec. 31, 2016 USD ($) Reporting_Unit Divisions | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Goodwill And Intangible Assets [Line Items] |  |  |  |
Number of internal divisions | Divisions |  | 2 |  |
Decrease in fair value of reporting units considered for impairment calculation |  | 10.00% |  |
Number of reporting units with fair values that approximated carrying values | Reporting_Unit |  | 2 |  |
Non-cash charge for impairment of goodwill | $ 39,800,000 | $ 0 |  |
Goodwill | 1,552,658,000 | 1,603,169,000 | $ 1,552,658,000 | $ 1,596,695,000
Intangible assets | 205,074,000 | $ 187,023,000 | 205,074,000 |
Intangible asset impairment charges | $ 12,100,000 |  | $ 12,100,000 |
Number of reporting units impacted impairment charge | Reporting_Unit | 2 |  |  |
Minimum [Member] |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |
Reporting units growth rates |  | (2.00%) |  |
Maximum [Member] |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |
Reporting units growth rates |  | 24.00% |  |
Oil and Gas Infrastructure Division, Operating Units that have been Negatively Impacted by Various Factors [Member] |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |
Goodwill |  | $ 68,000,000 |  |
Intangible assets |  | $ 11,900,000 |  |

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