Annual report pursuant to Section 13 and 15(d)

Property Plant and Equipment (Detail)

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Property Plant and Equipment (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]      
Machinery and Equipment, Gross $ 1,306,641,000 $ 1,396,748,000  
Rental Tools 516,144,000 521,662,000  
Buildings and Improvements, Gross 54,799,000 53,576,000  
Property, Plant and Equipment, Other, Gross 111,142,000 114,465,000  
Construction in Progress, Gross 25,357,000 21,770,000  
Property, Plant and Equipment, Gross 2,014,083,000 2,108,221,000  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 1,320,644,000 1,302,380,000  
Property, Plant and Equipment, Net 693,439,000 805,841,000  
Depreciation $ 136,300,000 $ 151,900,000 $ 142,500,000