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Fair Value Measurements - Schedule of Fair Values of Financial Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Financial assets:    
Cash equivalents $ 107,535 $ 69,807
Derivative financial instruments   1,765
Total financial assets 107,535 71,572
Financial liabilities:    
Derivative financial instruments 11,207 2,275
Contingent consideration 3,724 5,098
Total financial liabilities 14,931 7,373
Level 1 [Member]    
Financial assets:    
Cash equivalents 107,535 69,807
Total financial assets 107,535 69,807
Level 2 [Member]    
Financial assets:    
Derivative financial instruments   1,765
Total financial assets   1,765
Financial liabilities:    
Derivative financial instruments 11,207 2,275
Total financial liabilities 11,207 2,275
Level 3 [Member]    
Financial liabilities:    
Contingent consideration 3,724 5,098
Total financial liabilities $ 3,724 $ 5,098