Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Measurements [Abstract]

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

	Fair Value at December 31, 2018
	Level 1		Level 2		Level 3		Total
Intangible and other long-term assets, net:
Non-qualified deferred compensation assets	$	376	$	12,930	$	-	$	13,306
Accounts payable:
Non-qualified deferred compensation liabilities	$	-	$	1,138	$	-	$	1,138
Other long-term liabilities:
Non-qualified deferred compensation liabilities	$	-	$	19,766	$	-	$	19,766
Total debt	$	1,084,711	$	-	$	-	$	1,084,711
	Fair Value at December 31, 2017
	Level 1		Level 2		Level 3		Total
Intangible and other long-term assets, net:
Non-qualified deferred compensation assets	$	370	$	13,817	$	-	$	14,187
Accounts payable:
Non-qualified deferred compensation liabilities	$	-	$	1,253	$	-	$	1,253
Other long-term liabilities:
Non-qualified deferred compensation liabilities	$	-	$	21,085	$	-	$	21,085
Total debt	$	1,346,985	$	-	$	-	$	1,346,985

Fair Value Measurements Used in Testing

	Years Ended December 31, 2018
	Impairment		Fair Value
Property, plant and equipment, net	$	49,198	$	65,441
Goodwill	$	668,838	$	-
Intangible assets	$	21,689	$	-