Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Carrying Value [Member] | Other Current Assets [Member]
Assets:
Derivative assets	$ 262	$ 1,456
Carrying Value [Member] | Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	33
Estimate of Fair Value Measurement [Member] | Other Current Assets [Member]
Assets:
Derivative assets	262	1,456
Estimate of Fair Value Measurement [Member] | Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	33
Significant Other Observable Inputs (Level 2) [Member] | Other Current Assets [Member]
Assets:
Derivative assets	262	$ 1,456
Significant Other Observable Inputs (Level 2) [Member] | Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	$ 33