Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 4,986	$ 4,294	$ 7,391
Additions	364	692	1,152
Deductions	(1,291)		(4,249)
Ending Balance	4,059	4,986	4,294
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	200		258
Additions	364	200
Deductions			(258)
Ending Balance	564	200
Valuation Allowance for Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	4,786	4,294	7,133
Additions		492	1,152
Deductions	(1,291)		(3,991)
Ending Balance	$ 3,495	$ 4,786	$ 4,294