Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2019

Valuation and Qualifying Accounts

Valuation and qualifying accounts

			Additions -		Additions -
	Balance at		Charged to		Charged to					Balance at
	Beginning of		Costs and		Other Accounts -		Deductions -			End of
Description	Period		Expenses		Describe		Describe			Period
Allowance for doubtful accounts:
For the year ended December 31, 2019	$	13,238	$	9,461	$	—	$	8,282	(1)	$	14,417
For the year ended December 31, 2018		12,717		9,475		—		8,954	(1)		13,238
For the year ended December 31, 2017	$	12,040	$	8,598	$	—	$	7,921	(1)	$	12,717

(1) Uncollectable accounts written off.