Schedule II Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 683	$ 816	$ 702
Charged to Costs and Expenses	247	86	657
Deductions and Other	(345)	(219)	(543)
Balance at End of Year	$ 585	$ 683	$ 816