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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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