Schedule Of Valuation And Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2018

Valuation And Qualifying Accounts [Abstract]

Schedule Of Valuation And Qualifying Accounts

	Schedule II - Valuation Accounts
				Additions
			Balance at				Balance at
			Beginning	Charges to			End of
(in thousands)			of Period	Operations	Other	Deductions	Period
	Year ended December 31, 2018:
		Allowance for doubtful accounts(1)	$ 105	1,718	—	90	1,733
	Year ended December 31, 2017:
		Allowance for doubtful accounts(1)	$ 2,838	1,697	—	4,430	105
	Year ended December 31, 2016:
		Allowance for doubtful accounts(1)	$ 3,417	—	—	579	2,838
(1)		Deductions in the allowance for doubtful accounts represent write-offs, net of recoveries, of amounts
		determined to be uncollectible.
See accompanying Report of Independent Registered Public Accounting Firm incorporated herein by reference.