Debt and Other Obligations - Narrative (Details) - USD ($)
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3 Months Ended |
12 Months Ended |
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May 12, 2020 |
Apr. 20, 2020 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
Jun. 30, 2020 |
Mar. 30, 2020 |
Dec. 31, 2018 |
| Debt Instrument [Line Items] |
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| Long-term debt |
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$ 3,469,900,000
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$ 3,580,500,000
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| Repayments of long-term debt |
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135,900,000
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$ 42,600,000
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| Convertible debt |
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| Debt Instrument [Line Items] |
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| Long-term debt |
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175,000,000.0
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175,000,000.0
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| Payroll Support Program 2, Low-Interest Loan, CARES Act | Notes payable To United States Treasury |
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| Debt Instrument [Line Items] |
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| Principal amount |
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$ 25,300,000
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| Term |
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10 years
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| Payroll Support Program, Low-Interest Loan, CARES Act | Notes payable To United States Treasury |
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| Debt Instrument [Line Items] |
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| Principal amount |
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$ 73,300,000
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| Term |
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10 years
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10 years
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| Payroll Support Program, CARES Act | Notes payable To United States Treasury |
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| Debt Instrument [Line Items] |
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| Stated interest rate |
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1.00%
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| Payroll Support Program, CARES Act | Notes payable To United States Treasury | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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2.00%
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| Revolving credit facility due in 2024 | Line of Credit | Revolving credit facilities |
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| Debt Instrument [Line Items] |
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| Line of credit facility, maximum borrowing capacity |
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$ 240,000,000.0
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$ 180,000,000.0
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$ 110,000,000.0
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| Line of credit facility, optional maximum borrowing capacity subject to consent of lenders |
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$ 350,000,000
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| Proceeds from revolving credit facility |
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180,000,000.0
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180,000,000.0
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| Line of credit facility, remaining borrowing capacity |
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60,000,000.0
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$ 60,000,000.0
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| 4.75% Convertible Senior Notes | Convertible debt |
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| Debt Instrument [Line Items] |
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| Principal amount |
$ 175,000,000.0
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175,000,000.0
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| Stated interest rate |
4.75%
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| Debt instrument, convertible, if-converted value in excess of principal |
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265,400,000
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| Convertible debt, conversion price threshold |
130.00%
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| Number of trading days required for conversion price threshold |
20 days
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| Number of consecutive days required for trading days for conversion price threshold |
30 days
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| Number of consecutive business days for conversion price threshold |
5 days
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| Number of consecutive trading days measurement period |
5 days
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| Trading price threshold per principal amount portion |
98.00%
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| Shares conversion rate per portion of principal amount (in shares) |
78.4314
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| Principal amount portion for trading price threshold |
$ 1,000
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| Conversion price (in dollars per share) |
$ 12.75
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| 2020 Revolving Credit Facility | Line of Credit | Revolving credit facilities |
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| Debt Instrument [Line Items] |
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| Line of credit facility, maximum borrowing capacity |
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$ 160,000,000.0
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| Revolving credit facility due in 2021 | Line of Credit | Revolving credit facilities |
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| Debt Instrument [Line Items] |
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| Proceeds from revolving credit facility |
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$ 95,100,000
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| Payroll Support Program 2 |
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| Debt Instrument [Line Items] |
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| Proceeds received from Payroll Support Program |
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$ 184,500,000
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