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Fair Value of Assets and Liabilities - Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	$ 2,357,429	$ 2,876,524
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 (percent)	4.75%
Fair value disclosure	$ 249,558	249,348
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 (percent)	9.75%
Fair value disclosure	$ 495,274	987,903
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 (percent)	4.75%
Fair value disclosure	$ 493,154	492,199
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 (percent)	4.375%
Fair value disclosure	$ 492,771	492,127
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 (percent)	5.625%
Fair value disclosure	$ 342,469	342,183
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 (percent)	6.25%
Fair value disclosure	$ 243,267	243,051
Carrying Amount | Secured Debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	40,936	69,713
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	1,625,416	2,919,651
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	215,470	257,695
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	452,305	1,081,990
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	315,000	491,480
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	323,750	480,763
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	165,620	309,260
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	114,100	226,500
Estimated Fair Value | Secured Debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value disclosure	$ 39,171	$ 71,963

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