Notes Payable and Other Noncurrent Liabilities - Payments Due Under Notes Payable Obligations (Details) - Amended and restated credit agreement dated January 22, 2019 $ in Thousands	Mar. 31, 2019 USD ($)
Payments due under notes payable obligations:
2019	$ 36,317
2020	48,422
2021	48,422
2022	48,422
2023	48,422
Thereafter	18,411
Total	$ 248,416

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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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