Annual report pursuant to Section 13 and 15(d)

Schedule II-Valuation and Qualifying Accounts (Details)

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Schedule II-Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Allowance, Credit Loss [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]    
Balance at Beginning of Year $ 3,293 $ 3,269
Charged to Costs and Expense 1,131 426
Deductions from Reserves (3,430) (402)
Balance at End of Year $ 994 $ 3,293