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Senior Notes (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 20, 2018 | Jul. 16, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Senior Notes [Line Items] |  |  |  |  |  |  |
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 2,451,886 |  | $ 2,451,886 |  | $ 2,448,439
Loss on extinguishment of debt |  |  | 0 | $ 26,722 | 0 | $ 26,722 |
Accelerated unamortized deferred financing costs |  |  |  |  | 0 | 6,334 |
Interest costs capitalized |  |  | $ 4,200 | $ 5,200 | $ 14,100 | $ 15,700 |
6.125% Senior Notes due 2022 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 6.125% |  | 6.125% |  |
Principal amount |  |  | $ 476,796 |  | $ 476,796 |  | 476,796
Unamortized deferred financing costs |  |  | (3,170) |  | (3,170) |  | (3,921)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 473,626 |  | $ 473,626 |  | 472,875
5.0% Senior Notes due 2024 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 5.00% |  | 5.00% |  |
Principal amount |  |  | $ 500,000 |  | $ 500,000 |  | 500,000
Unamortized deferred financing costs |  |  | (3,996) |  | (3,996) |  | (4,688)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 496,004 |  | $ 496,004 |  | 495,312
5.625% Senior Notes due 2025 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 5.625% |  | 5.625% |  |
Principal amount |  |  | $ 500,000 |  | $ 500,000 |  | 500,000
Unamortized deferred financing costs |  |  | (5,130) |  | (5,130) |  | (5,808)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 494,870 |  | $ 494,870 |  | 494,192
6.75% Senior Notes due 2026 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 6.75% |  | 6.75% |  |
Principal amount |  |  | $ 500,000 |  | $ 500,000 |  | 500,000
Unamortized deferred financing costs |  |  | (5,780) |  | (5,780) |  | (6,407)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 494,220 |  | $ 494,220 |  | 493,593
6.625% Senior Notes due 2027 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 6.625% |  | 6.625% |  |
Principal amount | $ 500,000 |  | $ 500,000 |  | $ 500,000 |  | 500,000
Unamortized deferred financing costs |  |  | (6,834) |  | (6,834) |  | (7,533)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | 493,166 |  | 493,166 |  | 492,467
Senior Notes issuance proceeds, net of deferred financing costs | 492,100 |  |  |  |  |  |
Deferred financing costs | $ 7,900 |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Principal amount |  |  | 2,476,796 |  | 2,476,796 |  | 2,476,796
Unamortized deferred financing costs |  |  | (24,910) |  | (24,910) |  | (28,357)
Principal Amount, Net of Unamortized Deferred Financing Costs |  |  | $ 2,451,886 |  | $ 2,451,886 |  | $ 2,448,439
6.50% Senior Notes Due 2021 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  | 6.50% |  |  |  |  |
Total cash consideration paid to repurchase debt, including accrued interest |  | $ 355,900 |  |  |  |  |
6.50% Senior Notes Due 2023 [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  |  | 6.50% |  | 6.50% |
Q3 2018 Senior Notes Transactions [Member] |  |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |  |
Total cash consideration paid to repurchase debt, including accrued interest |  |  |  | $ 497,800 |  |  |
Loss on extinguishment of debt |  |  |  | 26,700 |  |  |
Premiums paid for debt extinguishment |  |  |  | 20,400 |  |  |
Accelerated unamortized deferred financing costs |  |  |  | $ 6,300 |  |  |

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