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Consolidated Statements Of Cash Flows - Supplemental Disclosures (Tables)
 12 Months Ended
Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]  
Consolidated Statement Of Cash Flows

Changes in the components of operating assets and liabilities are as follows (in thousands):
 
 
 
Year Ended December 31,
 
 
2017
 
2018
 
2019
Trade accounts receivable and other accounts receivable
 
$
(25,639
)
 
$
24,169

 
$
(20,156
)
Inventory
 
(47,967
)
 
(3,390
)
 
1,336

Accounts payable
 
8,954

 
21,146

 
(1,237
)
Accrued payroll and benefits
 
10,596

 
14,015

 
4,931

Accrued interest payable
 
5,014

 
(7,399
)
 
1,018

Accrued taxes other than income
 
1,177

 
1,750

 
12,914

Deferred revenue
 
15,904

 
5,191

 
(11,431
)
Accrued product liabilities
 
44,559

 
(20,677
)
 
15,306

Other current and noncurrent assets and liabilities
 
3,097

 
(12,559
)
 
5,313

Total
 
$
15,695

 
$
22,246

 
$
7,994