Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Accrued Liabilities [Abstract]

Carrying Value of Accrued Liabilities

The carrying values of accrued liabilities were as follows:

	December 31,
	2018		2017
	(In thousands)
Current deferred revenue	$	101,194	$	90,639
Wages, severance and related taxes	56,129		57,633
Accrued rebates	41,312		38,025
Employee benefits	25,670		25,406
Accrued interest	18,530		22,019
Other (individual items less than 5% of total current liabilities)	121,441		68,929
Accrued liabilities	$	364,276	$	302,651