Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value | Senior Notes | Bridge Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt agreements	$ 0	$ 50,000
Line of Credit | Carrying Amount | Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt agreements		62,335
Line of Credit | Fair Value | Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt agreements	$ 56,895	$ 65,794