SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II Valuation and Qualifying Accounts

Description	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions			Balance at End of Period
Year Ended December 31, 2016:
Allowance for doubtful accounts	$	7,715	$	1,056	$	(3,666	)	$	5,105
Year Ended December 31, 2017:
Allowance for doubtful accounts	$	5,105	$	935	$	(1,269	)	$	4,771
Year Ended December 31, 2018:
Allowance for doubtful accounts	$	4,771	$	1,273	$	(1,070	)	$	4,974