Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Reclassification out of Other comprehensive (loss) income (Details)

v3.20.4
Summary of Significant Accounting Policies - Reclassification out of Other comprehensive (loss) income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Summary of Significant Accounting Policies      
Reclassification adjustment for (gains) losses on available-for-sale debt securities $ (89) $ (13) $ 2,473