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Summary of Goodwill (Detail) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 USD ($)
Goodwill [Line Items] |  |
Beginning Balance | $ 1,283,371 | [1]
Foreign currency translation adjustments | (16,434) |
Ending Balance | 1,266,937 | [1]
U.S. Operating Segment |  |
Goodwill [Line Items] |  |
Beginning Balance | 1,182,853 | [1]
Ending Balance | 1,182,853 | [1]
International Operating Segment |  |
Goodwill [Line Items] |  |
Beginning Balance | 100,518 | [1]
Foreign currency translation adjustments | (16,434) |
Ending Balance | $ 84,084 | [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.

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