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

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Amount, before accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The net amount of operating interest income (expense).

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Long Term Debt - Senior Notes and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2016	Jun. 30, 2016
Debt Instrument [Line Items]
Senior notes			$ 600,000
Interest expense, net	$ (5,960)	$ (4,238)
Senior Notes
Debt Instrument [Line Items]
Stated percentage	3.25%		3.25%
Debt financing costs				$ 5,300