Schedule of Estimated Fair Value (Detail) - USD ($) $ in Thousands	Jun. 16, 2024	Dec. 31, 2023
2015 Ten-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	$ 742,000	$ 744,000
Fair Value	727,902	727,632
2017 Ten-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	940,000	942,500
Fair Value	899,580	895,375
2018 7.5-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	402,688	403,750
Fair Value	393,023	392,041
2018 9.25-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	379,000	380,000
Fair Value	365,735	365,180
2019 Ten-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	648,000	649,688
Fair Value	592,920	591,865
2021 7.5-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	826,625	828,750
Fair Value	735,696	730,958
2021 Ten-Year Notes [Member]
Debt Instrument [Line Items]
Principal Amount	972,500	975,000
Fair Value	$ 840,240	$ 830,700