Schedule II - Valuation And Qualifying Accounts And Reserves Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 2,332	$ 2,531
Additions charged to costs and expenses	3,155	527
Deductions and net write-offs	(1,704)	(726)
Balance at end of period	$ 3,783	$ 2,332