Debt - 5.00% Convertible Senior Notes Due 2021 (Details) - USD ($) $ in Thousands, shares in Millions	2 Months Ended	3 Months Ended
Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 672,973	$ 672,973	$ 416,466
Unamortized discount and deferred financing costs	28,877	28,877	23,826
Long-term debt	$ 644,096	$ 644,096	392,640
5.00% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	5.00%	5.00%
5.00% Convertible Senior Notes due 2021 \| Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 71,600	$ 71,600
Convertible Debt \| 5.00% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	5.00%	5.00%
Principal amount of long-term debt	$ 79,895	$ 79,895	$ 115,000
Unamortized discount and deferred financing costs	8,300	8,300
Repurchased face amount	35,100	35,100
Repurchased amount in cash	$ 16,200
Repurchased amount, shares (in shares)	1.4
Repurchase amount, fair value	$ 30,100
Gain (loss) on extinguishment of debt		$ (3,700)

Stock Issued During the Period, Fair Value, Repurchase Of Convertible Debt

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Stock Issued During the Period, Shares, Repurchase Of Convertible Debt

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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.

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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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Face (par) amount of the original debt instrument that was repurchased.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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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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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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