Quarterly report pursuant to Section 13 or 15(d)

Summary of Goodwill (Detail)

v3.8.0.1
Summary of Goodwill (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 1,284,079 [1]
Foreign currency translation adjustments (134)
Ending Balance 1,283,945 [1]
U.S. Operating Segment  
Goodwill [Line Items]  
Beginning Balance 1,174,041 [1]
Ending Balance 1,174,041 [1]
International Operating Segment  
Goodwill [Line Items]  
Beginning Balance 110,038 [1]
Foreign currency translation adjustments (134)
Ending Balance $ 109,904 [1]
[1] Balances are presented net of accumulated impairment losses of $214,031 for the U.S. operating segment and $27,622 for the international operating segment.