Schedule II Valuation and Qualifying Accounts (Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances And Reserves, Balance At Beginning Of Period	$ 9,691	$ 6,064	$ 4,307
Valuation Allowances And Reserves, Charged To Cost And Expense	7,399	3,567	1,924
SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery		60
Valuation Allowances And Reserves, Deductions	(6,302)		(167)
Valuation Allowances And Reserves, Balance At End Of Period	$ 10,788	$ 9,691	$ 6,064