Change in Method of Accounting for Inventory Valuation - Additional Information (Detail) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Change In Accounting Estimate [Line Items]
Percentage of LIFO inventory			68.00%
Retained earnings	[1],[2]	$ 906,612	$ 837,107
Effect of Change [Member]
Change In Accounting Estimate [Line Items]
Retained earnings		$ (21,397)	$ 23,659

[1] The 2018 amounts for the noted line items have been retrospectively changed from the amounts originally reported as a result of the Company’s first quarter 2019 change in method of accounting for U.S. inventory valuation from LIFO to FIFO.

[2] The 2019 amounts for the noted line items include an adjustment related to the Company’s first quarter 2019 adoption of ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.