Summary of Long Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt	$ 1,249,059	$ 836,405
Less deferred financing costs and discounts	(8,801)	(5,468)
Less current portion	(12,049)
Total	1,228,209	830,937
3.95% Senior Notes
Debt Instrument [Line Items]
Long-term debt	482,505	488,505
5.15% Senior Notes
Debt Instrument [Line Items]
Long-term debt	344,895	347,900
7.15% Senior Notes
Debt Instrument [Line Items]
Long-term debt	400,000	$ 0
Equipment Loans Due 2025
Debt Instrument [Line Items]
Long-term debt	$ 21,659