SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of Depreciation Expense on Property And Equipment

Depreciation expense for property and equipment is reflected in the following table:

	Property And Equipment
	Years Ended December 31,
	2020		2019		2018
	(amounts in thousands)
Depreciation expense	$	33,618	$	31,866	$	28,709

Schedule of Property And Equipment By Category

The following is a summary of the categories of property and equipment along with the range of estimated useful lives used for depreciation purposes:

	Depreciation Period				Property And Equipment
	In Years				December 31,
	From		To		2020		2019
Land, land easements and land improvements	0		15		$	104,671	$	107,281
Buildings	20		40		36,101		34,777
Equipment	3		40		216,347		210,872
Furniture and fixtures	5		10		19,896		19,393
Other		*		*	44		44
Leasehold improvements		*		*	106,642		98,833
					483,701		471,200
Accumulated depreciation					(192,147)		(163,416)
					291,554		307,784
Capital improvements in progress					48,764		42,882
Net property and equipment					$	340,318	$	350,666

*    Shorter of economic life or lease term

Contract Assets and Liabilities

The following table presents the amounts of unearned revenues as of the periods indicated:

		Unearned Revenues
		December 31,
	Balance Sheet Location	2020		2019
		(amounts in thousands)
Current	Other current liabilities	$	15,651	$	9,894
Long-term	Other long-term liabilities	$	1,294	$	2,113

	December 31,
Description	2020		2019
	(amounts in thousands)
Receivables, included in “Accounts receivable net of allowance for doubtful accounts”	$	272,321	$	376,504
Unearned revenue - current	15,651		9,894
Unearned revenue - noncurrent	1,294		2,113

Schedule of Change in Asset Retirement Obligation