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Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Detail) - Recurring - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Assets    
Money market and mutual funds $ 117,084  
Derivative financial instruments 14,167 $ 6,318
Total 131,251 6,318
Liabilities    
Derivative financial instruments 2,064 2,258
Total 2,064 2,258
Level 1    
Assets    
Money market and mutual funds 117,084 0
Total 117,084 0
Level 2    
Assets    
Money market and mutual funds 0  
Derivative financial instruments 14,167 6,318
Total 14,167 6,318
Liabilities    
Derivative financial instruments 2,064 2,258
Total 2,064 2,258
Level 3    
Assets    
Money market and mutual funds 0  
Liabilities    
Derivative financial instruments $ 0 $ 0