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Fair Value of Assets and Liabilities - Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	$ 2,334,980	$ 2,347,877
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 4.750% coupon rate, due 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	4.75%
Fair value disclosure	$ 249,837	249,628
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 9.750% coupon rate, due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	9.75%
Fair value disclosure	$ 497,019	495,710
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 4.750% coupon rate, due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	4.75%
Fair value disclosure	$ 494,428	493,473
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 4.375% coupon rate, due 2031
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	4.375%
Fair value disclosure	$ 493,630	492,986
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 5.625% coupon rate, due 2042
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	5.625%
Fair value disclosure	$ 342,851	342,565
Carrying Amount | Senior Unsecured Notes | Senior unsecured notes, 6.250% coupon rate, due 2046
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Coupon rate	6.25%
Fair value disclosure	$ 243,555	243,338
Carrying Amount | Secured Debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	13,660	30,177
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	1,797,101	1,586,515
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 4.750% coupon rate, due 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	236,225	211,250
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 9.750% coupon rate, due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	481,350	478,985
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 4.750% coupon rate, due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	364,555	284,375
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 4.375% coupon rate, due 2031
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	346,180	317,130
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 5.625% coupon rate, due 2042
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	201,600	151,200
Estimated Fair Value | Senior Unsecured Notes | Senior unsecured notes, 6.250% coupon rate, due 2046
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	154,700	115,300
Estimated Fair Value | Secured Debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	$ 12,491	$ 28,275

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