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

Schedule II

Valuation and Qualifying Accounts (in thousands)

	Balance at Beginning of Period		Charged to Revenue and Expenses		Charged to (from) Other Accounts		Deductions			Balance at End of Period
As of December 31, 2018
Allowance for bad debts and sales-related allowances	$	32,236	$	7,034	$	—	$	(7,005	)	$	32,265
As of December 31, 2017
Allowance for bad debts and sales-related allowances	23,330		12,416		—		(3,510		)	32,236
As of December 31, 2016
Allowance for bad debts and sales-related allowances	21,993		10,678		—		(9,341		)	23,330