Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details)

v3.21.1
Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt (Level 2) $ 320,279 $ 363,460
Carrying Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt (Level 2) $ 316,709 $ 357,536