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v3.20.1

Long Term Debt Additional Information (Details) - USD ($) |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 17, 2020 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |
Amortization of debt discount |  | $ 2,264,000 | $ 1,510,000 |
Term Loan Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Gross |  | 251,800,000 |  |
Long-term Debt |  | 250,322,000 |  | $ 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 |  | 238,000,000 |  | $ 220,000,000
Line of Credit Facility, Remaining Borrowing Capacity |  | 344,500,000 |  |
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 |  |
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 |  | $ 2,300,000 | 1,500,000 |
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 | $ 1,600,000 |
Debt Instrument, Convertible, Gross Amount of Equity Component |  | $ 51,600,000 |  |
Debt Instrument, Convertible, Initial Conversion Rate |  | 11.2608 |  |
Conversion price (in dollars per share) |  | $ 88.80 |  |
Option indexed to issuer's equity, strike price (in dollars per share) |  | $ 114.92 |  |
Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 2.50% |  |
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 |  | 1.50% |  |
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 |  | 0.50% |  |
Eurodollar [Member] | Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.00% |  |
Call Option [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Hedge and warrant transactions, net cash paid |  | $ 21,000,000.0 |  |
Subsequent Event [Member] | Long-term Debt [Member] | Amended and Restated Senior Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.50% |  |  |
Subsequent Event [Member] | 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 | 2.50% |  |  |
Subsequent Event [Member] | 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% |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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