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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2019
Revenue Recognition
Retained earnings	$ 143,173	$ 173,731
ASC 606
Revenue Recognition
Retained earnings			$ 11,900
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Revenue Recognition
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Revenue Recognition
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