Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 1,135	$ 868	$ 495
Additions Charged to Costs and Expenses	219	776	334
Deductions	33	509
Recoveries			(39)
Other	0	0	0
Balance at End of Period	1,321	1,135	868
Valuation Allowance of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	9,083	9,013	6,607
Additions Charged to Costs and Expenses	(593)	70	2,406
Deductions	0	0	0
Other	885	0	0
Balance at End of Period	$ 9,375	$ 9,083	$ 9,013