Quarterly report pursuant to Section 13 or 15(d)

Summary of Revenues Disaggregated Based on Timing of Revenue Recognition (Detail)

v3.8.0.1
Summary of Revenues Disaggregated Based on Timing of Revenue Recognition (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Disaggregation of Revenue [Line Items]  
Total revenues $ 779,971
U.S. Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues 596,343 [1]
International Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues 183,628
Goods and Services Transferred at a Point in Time  
Disaggregation of Revenue [Line Items]  
Total revenues 741,975
Goods and Services Transferred at a Point in Time | U.S. Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues 575,826 [1]
Goods and Services Transferred at a Point in Time | International Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues 166,149
Goods and Services Transferred Over Time  
Disaggregation of Revenue [Line Items]  
Total revenues 37,996
Goods and Services Transferred Over Time | U.S. Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues 20,517 [1]
Goods and Services Transferred Over Time | International Operating Segment  
Disaggregation of Revenue [Line Items]  
Total revenues $ 17,479
[1] U.S. segment revenues include eliminations of intercompany transactions with the international operating segment. See Note 15 for additional information by segment.