Accounts Receivable and Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Accounts Receivable and Inventories [Abstract]

Schedule of accounts receivable

Accounts receivable consist of the following:

(In thousands)	December 31 2019			December 31 2018
Trade accounts receivable	$	323,502		$	251,013
Less: Allowance for doubtful accounts	(13,512		)	(4,586		)
Trade accounts receivable, net	$	309,990		$	246,427
Insurance claim receivable (a)	$	—		$	30,000
Other receivables (b)	$	21,265		$	23,770

(a) Relates to the Lima Refinery litigation. See Note 11, Commitments and Contingencies, for additional information.

(b)

Other receivables include employee receivables, tax claim receivables and other miscellaneous receivables not included in Trade accounts receivable, ne

Schedule of provision for doubtful accounts related to trade accounts receivable

The provision for doubtful accounts related to trade accounts receivable was as follows:

	Years Ended December 31
(In thousands)	2019		2018		2017
Provision for doubtful accounts related to trade accounts receivable	$	7,507	$	380	$	5,211

Schedule of inventories

Inventories consist of the following:

(In thousands)	December 31 2019		December 31 2018
Finished goods	$	14,550	$	11,892
Work-in-process	13,088		20,839
Raw materials and purchased parts	104,488		61,547
Stores and supplies	24,865		21,907
Total inventories	$	156,991	$	116,185
Valued at lower of cost or market:
LIFO basis	$	101,465	$	66,650
FIFO basis	7,473		5,719
Average cost basis	48,053		43,816
Total inventories	$	156,991	$	116,185

Schedule of contracts in process