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Long-Term Debt - Narrative (Details) |  |  |  |  | 3 Months Ended | 12 Months Ended
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Oct. 07, 2020 USD ($) fiscalQuarterPeriod | Nov. 15, 2019 USD ($) tradingDay | Jun. 27, 2017 USD ($) | Jun. 10, 2014 USD ($) tradingDay | Dec. 31, 2020 USD ($) tradingDay $ / shares | Dec. 31, 2019 USD ($) tradingDay | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Redemption premium |  |  |  |  |  |  | $ 29,250,000 | $ 0 | $ 0
Gain (loss) on extinguishment of debt |  |  |  |  |  |  | (37,969,000) | 0 | 0
Unamortized debt discount |  |  |  |  | $ 112,798,000 | $ 139,981,000 | 112,798,000 | 139,981,000 |
Total fair value adjustments reported in earnings |  |  |  |  |  |  | 0 | (800,000) | 0
Debt issuance costs |  |  |  |  | 11,505,000 | 14,058,000 | 11,505,000 | 14,058,000 |
Proceeds from line of credit |  |  |  |  |  |  | 0 | 185,000,000 | 0
Lines of credit paid off |  |  |  |  |  |  | 0 | 185,000,000 | 0
Interest expense |  |  |  |  |  |  | 133,800,000 | 70,200,000 | 63,500,000
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 1,703,324,000 |  | 1,703,324,000 |  |
Senior Notes | 6.0% Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  |  | $ 650,000,000 |  |  |  |  |  |
Stated interest rate | 6.00% |  |  |  |  |  |  |  |
Proceeds from debt, net of issuance costs |  |  | $ 636,500,000 |  |  |  |  |  |
Redemption payment of senior notes | $ 694,600,000 |  |  |  |  |  |  |  |
Redemption premium | 29,200,000 |  |  |  |  |  |  |  |
Payments of interest | 15,400,000 |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt | (38,000,000.0) |  |  |  |  |  |  |  |
Fair value of senior notes |  |  |  |  |  | 689,800,000 |  | 689,800,000 |
Unamortized debt discount |  |  |  |  |  | 8,425,000 |  | 8,425,000 |
Debt issuance costs |  |  |  |  |  | 1,466,000 |  | 1,466,000 |
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 0 | 650,000,000 | 0 | 650,000,000 |
Senior Notes | 4.625% Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount | $ 750,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 4.625% |  |  |  |  |  |  |  |
Proceeds from debt, net of issuance costs | $ 742,700,000 |  |  |  |  |  |  |  |
Covenant, leverage ratio, minimum | 3.5 |  |  |  |  |  |  |  |
Fair value of senior notes |  |  |  |  | 796,900,000 |  | 796,900,000 |  |
Percentage principal outstanding to be eligible for redemption | 50.00% |  |  |  |  |  |  |  |
Covenant, EBITDA minimum | 50.00% |  |  |  |  |  |  |  |
Covenant, EBITDA minimum, fiscal quarter period | fiscalQuarterPeriod | 4 |  |  |  |  |  |  |  |
Covenant restricted payment threshold | $ 250,000,000 |  |  |  |  |  |  |  |
Unamortized debt discount |  |  |  |  | 5,523,000 |  | 5,523,000 |  |
Debt issuance costs |  |  |  |  | 1,761,000 |  | 1,761,000 |  |
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 750,000,000 | 0 | 750,000,000 | 0 |
Senior Notes | 4.625% Senior Notes | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Percentage of principal amount redeemed | 40.00% |  |  |  |  |  |  |  |
Redemption price, percentage | 104.625% |  |  |  |  |  |  |  |
Senior Notes | 4.625% Senior Notes | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Redemption price, percentage | 100.00% |  |  |  |  |  |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 1,702,414,000 | 1,602,500,000 | 1,702,414,000 | 1,602,500,000 |
Convertible Debt | 3.25% Convertible Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  |  |  | $ 402,500,000 |  |  |  |  |
Stated interest rate |  |  |  | 3.25% |  |  |  |  |
Percentage of principal amount redeemed |  |  |  | 100.00% |  |  |  |  |
Fair value of senior notes |  |  |  |  | $ 593,100,000 | $ 583,600,000 | $ 593,100,000 | 583,600,000 |
Contingent interest, minimum trading price per principal amount |  |  |  | $ 1,300 |  |  |  |  |
Convertible debt threshold trading days | tradingDay |  |  |  |  |  | 20 |  |  |
Convertible debt threshold consecutive trading days | tradingDay |  |  |  |  | 30 | 30 |  |  |
Convertible debt conversion ratio |  |  |  |  | 1.30 | 1.30 | 0.0147632 |  |
Convertible debt conversion price (in usd per share) | $ / shares |  |  |  |  | $ 67.74 |  | $ 67.74 |  |
Borrowing rates of similar debt without the conversion feature |  |  |  | 5.79% |  |  |  |  |
Unamortized debt discount |  |  |  | $ 59,000,000.0 | $ 4,644,000 | $ 14,363,000 | $ 4,644,000 | 14,363,000 |
Convertible debt carrying amount of equity component |  |  |  | $ 37,700,000 | 37,688,000 | 37,700,000 | 37,688,000 | 37,700,000 |
Effective interest rate |  |  |  | 5.81% |  |  |  |  |
If-converted value in excess of the principal amount |  |  |  |  |  |  | $ 173,300,000 | 154,300,000 |
Convertible debt remaining discount amortization period |  |  |  |  |  |  | 6 months |  |
Debt issuance costs |  |  |  |  | 855,000 | 2,605,000 | $ 855,000 | 2,605,000 |
Interest expense |  |  |  |  |  |  | 24,546,000 | 23,852,000 | $ 23,198,000
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 402,414,000 | 402,500,000 | 402,414,000 | 402,500,000 |
Convertible Debt | 3.25% Convertible Notes | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Convertible debt threshold trading days | tradingDay |  |  |  | 20 |  |  |  |  |
Convertible debt threshold consecutive trading days | tradingDay |  |  |  | 30 |  |  |  |  |
Convertible debt conversion ratio |  |  |  | 1.30 |  |  |  |  |
Convertible Debt | 3.25% Convertible Notes | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Convertible debt threshold consecutive trading days | tradingDay |  |  |  | 10 |  |  |  |  |
Convertible debt conversion ratio |  |  |  | 0.98 |  |  |  |  |
Convertible debt threshold consecutive business days | tradingDay |  |  |  | 5 |  |  |  |  |
Convertible Debt | 1.75% Convertible Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 550,000,000.0 |  |  |  |  |  |  |
Stated interest rate |  | 1.75% |  |  |  |  |  |  |
Proceeds from debt, net of issuance costs |  | $ 537,100,000 |  |  |  |  |  |  |
Fair value of senior notes |  |  |  |  | $ 569,700,000 | 559,600,000 | $ 569,700,000 | 559,600,000 |
Convertible debt conversion ratio |  |  |  |  |  |  | 0.0079864 |  |
Convertible debt conversion price (in usd per share) | $ / shares |  |  |  |  | $ 125.21 |  | $ 125.21 |  |
Borrowing rates of similar debt without the conversion feature |  | 5.50% |  |  |  |  |  |  |
Unamortized debt discount |  | $ 118,900,000 |  |  | $ 102,631,000 | 117,193,000 | $ 102,631,000 | 117,193,000 |
Convertible debt carrying amount of equity component |  | $ 88,100,000 |  |  | 88,138,000 | 88,138,000 | $ 88,138,000 | 88,138,000 |
Effective interest rate |  | 5.50% |  |  |  |  |  |  |
Convertible debt remaining discount amortization period |  |  |  |  |  |  | 5 years 9 months 18 days |  |
Debt issuance costs |  | $ 2,800,000 |  |  | 8,889,000 | 9,987,000 | $ 8,889,000 | 9,987,000 |
Gross debt issuance costs |  | 12,900,000 |  |  |  |  |  |  |
Accumulated amortization of debt issuance costs |  | $ 10,100,000 |  |  |  |  |  |  |
Unamortized debt issuance expense |  |  |  |  | 8,900,000 |  | 8,900,000 |  |
Interest expense |  |  |  |  |  |  | 25,314,000 | 3,014,000 |
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | 550,000,000 | 550,000,000 | 550,000,000 | 550,000,000 |
Convertible Debt | 1.75% Convertible Notes | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Convertible debt threshold trading days | tradingDay |  | 20 |  |  |  |  |  |  |
Convertible debt threshold consecutive trading days | tradingDay |  | 30 |  |  |  |  |  |  |
Convertible debt conversion ratio |  | 1.30 |  |  |  |  |  |  |
Convertible Debt | 1.75% Convertible Notes | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Convertible debt threshold trading days | tradingDay |  | 5 |  |  |  |  |  |  |
Convertible debt threshold consecutive trading days | tradingDay |  | 10 |  |  |  |  |  |  |
Convertible debt conversion ratio |  | 0.98 |  |  |  |  |  |  |
Line of Credit | MUFG Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from line of credit |  |  |  |  |  |  |  | 185,000,000.0 |
Lines of credit paid off |  |  |  |  |  |  |  | 185,000,000.0 |
Line of credit, debt issuance costs before accumulated amortization |  |  |  |  | 400,000 |  | 400,000 |  |
Line of credit, debt issuance costs after accumulated amortization |  |  |  |  |  | 300,000 |  | 300,000 |
Interest expense |  |  |  |  |  |  | 0 | 3,400,000 |
Loans Payable | Paycheck Protection Program, CARES Act |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Outstanding debt originating from the Paycheck Protection Program |  |  |  |  | $ 910,000 | $ 0 | $ 910,000 | $ 0 |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870 + Details
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- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870 + Details
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- Definition Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870 + Details
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- Definition Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: 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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + 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 Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: 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 Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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