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Fair Value of Financial Instruments - (Additional Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 11, 2019	Mar. 31, 2019	Apr. 23, 2015
4.375% Senior Notes due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.375%	4.375%
Long-term debt	$ 300,000	$ 300,000
Face value of trades, percentage	99.00%
5.00% Senior Notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	5.00%			5.00%
Long-term debt	$ 300,000			$ 300,000
Face value of trades, percentage	103.00%		99.00%

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+ References

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

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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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