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Long-term Debt - Textual (Details) | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Nov. 30, 2020 USD ($) | May 31, 2020 USD ($) | Nov. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Oct. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2015 USD ($) | Aug. 31, 2015 USD ($) | Jan. 31, 2015 USD ($) | Sep. 30, 2014 USD ($) | Sep. 30, 2012 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  | $ 2,300,000 | $ 7,700,000 | $ 0 |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, (percent) |  |  |  |  |  | 101.00% |  |  |  |  |  |  |  |  |
Proceeds from debt issuance costs |  | $ 583,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  | $ 0 | 45,000,000.0 |  |  |  |  |  |  |  |
The Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts outstanding under letter of credit facility |  |  |  |  |  | 36,700,000 | $ 38,900,000 |  |  |  |  |  |  |  |
The Credit Agreement | Term Loan Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee (percent) |  |  | 0.375% |  |  |  |  |  |  |  |  |  |  |  |
Senior secured leverage ratio maximum |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Payment limit under the credit agreement's negative covenant |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |
The Credit Agreement | Fed Funds Effective Rate Overnight Index Swap Rate | Term Loan Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Spread on variable rate (percent) |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |
The Credit Agreement | LIBOR | Term Loan Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Spread on variable rate (percent) |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |
The Credit Agreement | Term loan facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility borrowing capacity |  |  | $ 270,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of aggregate principal amount outstanding (percent) |  |  |  |  |  |  | 1.25% |  |  |  |  |  |  |  |
The Credit Agreement | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility borrowing capacity |  |  | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Applicable interest rate under credit facility (percent) |  |  |  |  |  |  | 3.20% |  |  |  |  |  |  |  |
The Credit Agreement | Letter of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility borrowing capacity |  |  | $ 260,000,000 |  |  |  |  |  |  |  |  |  |  |  |
5.125% Senior Notes due 2023 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  | $ 298,100,000 | $ 297,300,000 |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  | 5.125% | 5.125% | 5.125% |  |  |  |  |  |  |  |
Net proceeds for offering |  |  |  |  | $ 295,000,000 |  |  |  |  |  |  |  |  |  |
Effective interest rate (percent) |  |  |  |  | 5.40% |  |  |  |  |  |  |  |  |  |
5.75% Senior Notes due 2024 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable | $ 700,000,000 |  |  |  |  | $ 0 | $ 697,300,000 |  |  |  |  |  |  |  |
Redemption price, (percent) |  |  | 100.958% | 101.917% |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 350,000,000 | $ 400,000,000 | $ 175,000,000 | $ 275,000,000
Debt instrument interest rate (percent) |  |  |  |  |  | 5.75% | 5.75% |  |  |  |  |  |  |  | 5.75%
Effective interest rate (percent) | 5.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issue price as percentage of principal (percent) |  |  |  |  |  |  |  |  |  |  |  | 100.50% | 102.00% | 103.625% |
Debt redeemed |  |  | $ 400,000,000 | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 300,000,000 |  | $ 404,000,000 | $ 102,000,000 |  |  |  |  |  |  |  |  |  |  |
5.75% Senior Notes due 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  | $ 346,300,000 | $ 345,600,000 |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  | $ 350,000,000 |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  |  | 5.75% | 5.75% |  |  |  | 5.75% |  |  |  |
Effective interest rate (percent) |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |
4.50% Senior Notes due 2028 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  | $ 785,000,000.0 | $ 491,700,000 |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 300,000,000 |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  |  | 4.50% | 4.50% |  |  | 4.50% |  |  |  |  |
Effective interest rate (percent) |  |  |  |  |  |  |  |  |  | 4.80% |  |  |  |  |
Issuance of face value (percent) |  | 99.00% |  |  |  |  |  |  |  |  |  |  |  |  |
4.75% Senior Notes due 2030 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  | $ 783,200,000 | $ 491,700,000 |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 300,000,000 |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  |  | 4.75% | 4.75% |  |  | 4.75% |  |  |  |  |
Effective interest rate (percent) |  |  |  |  |  |  |  |  |  | 5.20% |  |  |  |  |
Issuance of face value (percent) |  | 98.50% |  |  |  |  |  |  |  |  |  |  |  |  |
04.625% Senior Notes due 2031 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  |  |  |  |  | 4.625% |  |  |  |  |  |
Effective interest rate (percent) |  |  |  |  |  |  |  |  | 4.80% |  |  |  |  |  |

X
- Definition We are restricted from paying common stock dividends, prepaying certain senior notes, and repurchasing preferred and common equity unless (1) we are not in default under the terms of the Credit Agreement and (2) the amount of such payments, when added to the aggregate amount of prior restricted payments (as defined in the Credit Agreement) does not exceed $200 million, which amount is subject to increase by a portion of excess cash flows each fiscal year. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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