Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Measurements [Abstract]

Summary Of Financial Assets And Liabilities Measured At Fair Value On Recurring Basis

	Fair Value at December 31, 2020
	Level 1		Level 2		Level 3		Total
Intangible and other long-term assets, net:
Non-qualified deferred compensation assets	$	-	$	15,013	$	-	$	15,013
Accounts payable:
Non-qualified deferred compensation liabilities	$	-	$	2,869	$	-	$	2,869
Other long-term liabilities:
Non-qualified deferred compensation liabilities	$	-	$	20,697	$	-	$	20,697
Total debt	$	409,050	$	-	$	-	$	409,050
	Fair Value at December 31, 2019
	Level 1		Level 2		Level 3		Total
Intangible and other long-term assets, net:
Non-qualified deferred compensation assets	$	-	$	15,499	$	-	$	15,499
Accounts payable:
Non-qualified deferred compensation liabilities	$	-	$	1,372	$	-	$	1,372
Other long-term liabilities:
Non-qualified deferred compensation liabilities	$	-	$	23,466	$	-	$	23,466
Total debt	$	1,021,300	$	-	$	-	$	1,021,300

Fair Value Measurements Used in Testing

	Years Ended December 31,
	2020				2019
	Impairment		Fair Value		Impairment		Fair Value
Intangible assets	$	-	$	-	$	7,556	$	-
Property, plant and equipment, net	$	26,897	$	13,593	$	9,629	$	25,000