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Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Allowance for doubtful accounts [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 16,428 $ 9,173 $ 13,392
Additions charged to costs and expenses 5,918 1,262 1,286
Accounts written off (825) (2,024) (4,642)
Translation adjustments (513) (180) (863)
Other 0 8,197 0
Balance at end of period 21,008 16,428 9,173
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 203,765 200,280 207,483
Additions charged to costs and expenses 35,555 5,659 (1,821)
Acquisitions   0 3,887
Accounts written off 0 0 0
Translation adjustments 17,851 (2,174) (9,269)
Other 0 0 0
Balance at end of period $ 257,171 $ 203,765 200,280
Scenario, Adjustment [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Adjustment to foreign net operating loss carryforwards     $ (5,900)