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v3.20.2

Long Term Debt Additional Information (Details) |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 29, 2019 USD ($) $ / shares | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Feb. 07, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Amortization of debt discount |  |  |  | $ 7,239,000 | $ 6,038,000 |  |
Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Gross |  | $ 245,100,000 |  | 245,100,000 |  |  |
Long-term Debt |  | 243,563,000 |  | 243,563,000 |  | $ 253,535,000 |
Term Loan Facility [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 265,000,000.0
Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  | 230,000,000 |  | 230,000,000 |  | $ 220,000,000 |
Line of Credit Facility, Remaining Borrowing Capacity |  | 352,500,000 |  | 352,500,000 |  |  |
Line of Credit [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | 585,000,000.0
Letter of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | 2,500,000 |  | 2,500,000 |  |  |
Convertible Notes Payable [Member] | 2.625 Percent Convertible Notes Due 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 345,000,000.0 |  |  |  |  |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component | $ 39,100,000 |  |  |  |  |  |
Amortization of debt discount |  | 2,400,000 | $ 2,300,000 | 7,200,000 | 6,000,000.0 |  |
Interest rate, stated percentage | 2.625% |  |  |  |  |  |
Credit Agreement Expiration Trigger Requirement, Convertible Note Outstanding Balance |  |  |  |  |  |  | $ 150,000,000.0
Debt Instrument, Interest Rate, Effective Percentage | 6.14% |  |  |  |  |  |
Interest Expense, Debt |  | $ 2,300,000 | $ 2,300,000 | $ 6,800,000 | $ 6,000,000.0 |  |
Debt Instrument, Convertible, Gross Amount of Equity Component | $ 51,600,000 |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares | $ 88.80 |  |  |  |  |  |
Option indexed to issuer's equity, strike price (in dollars per share) | $ / shares | $ 114.92 |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Ratio | 11.2608 |  |  |  |  |  |
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  |  | 0.50% |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.50% |  | 4.50% |  |  |
LIBOR Interest Rate Floor |  |  |  | 1.00% |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 3.50% |  |  |
Fed Funds Effective Rate Overnight Index Swap Rate [Member] | Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 2.50% |  |  |
Eurodollar [Member] | Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 3.50% |  |  |
Call Option [Member] | Convertible Notes Payable [Member] | 2.625 Percent Convertible Notes Due 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Hedge and warrant transactions, net cash paid | $ 21,000,000.0 |  |  |  |  |  |

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