Annual report pursuant to Section 13 and 15(d)

Income Taxes - Valuation Allowance (Details)

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Income Taxes - Valuation Allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Valuation allowance at the Beginning of Period $ 0 $ (11,250) $ (11,370)
Income tax expense 0 0 0
Increase in valuation allowance 0 0 0
Release of valuation allowance 0 11,250 120
Valuation allowance at the End of Period $ 0 $ 0 $ (11,250)