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Debt Instrument, Convertible, Gross Amount of Equity Component

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Up-front costs to purchase hedge instruments, net of cash received from sale of warrants

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LIBOR Interest Rate Floor

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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.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Exercise or strike price stated in the contract for options indexed to the issuer's equity shares.

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Long Term Debt Additional Information (Details)			3 Months Ended		6 Months Ended
Long Term Debt Additional Information (Details)	Jul. 16, 2021 USD ($)	Jan. 29, 2019 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Feb. 07, 2019 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount					$ 5,031,000	$ 4,810,000
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 233,500,000		233,500,000
Long-term Debt			232,158,000		232,158,000		$ 240,145,000
Term Loan Facility [Member] \| Amended and Restated Senior Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount								$ 265,000,000.0
Term Loan Facility [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 233,500,000
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt			185,000,000.0		185,000,000.0		$ 207,000,000
Line of Credit Facility, Remaining Borrowing Capacity			397,400,000		397,400,000
Letters of Credit Outstanding, Amount			2,600,000		2,600,000
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
Line of Credit [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 585,000,000.0
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			2,500,000	$ 2,500,000	5,000,000.0	4,800,000
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	$ 2,300,000	$ 4,500,000	$ 4,500,000
Debt Instrument, Convertible, Gross Amount of Equity Component		$ 51,600,000
Conversion price (in dollars per share) \| $ / shares		$ 88.80
Debt Instrument, Convertible, Conversion Ratio		11.2608
Convertible Notes Payable [Member] \| 2.625 Percent Convertible Notes Due 2024 [Member] \| Warrant
Debt Instrument [Line Items]
Option indexed to issuer's equity, strike price (in dollars per share) \| $ / shares		$ 114.92
Long-term Debt [Member] \| Amended and Restated Senior Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage			2.625%		2.625%
LIBOR Interest Rate Floor					0.125%
Long-term Debt [Member] \| Amended and Restated Senior Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					2.50%
Long-term Debt [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Subsequent Event [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Long-term Debt [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Subsequent Event [Member] \| Adjusted LIBOR
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Long-term Debt [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Subsequent Event [Member] \| Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
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