Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Non-cash investing and financing activities:
Acquisition of property, plant and equipment in accounts payable and accrued liabilities	$ 12,995	$ 16,657
Final settlement of prior year stock repurchase forward contract	0	50,000
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	19,323	19,643
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 12,259	$ 22,820