Balance Sheet Details (Tables)

6 Months Ended

Jun. 30, 2019

Balance Sheet Details [Abstract]

Schedule of Other Assets and Other Liabilities [Table Text Block]

The following table provides detail of selected balance sheet items:

(dollars in thousands)	June 30, 2019		December 31, 2018
Accounts receivable:
Trade receivables	$	90,850	$	82,521
Other receivables	2,100		1,456
Total accounts receivable, less allowances of $8,956 and $8,538	$	92,950	$	83,977
Inventories:
Finished goods	$	185,185	$	175,074
Work in process	1,746		1,363
Raw materials	3,608		4,026
Repair parts	10,279		10,116
Operating supplies	1,746		1,524
Total inventories, less loss provisions of $8,051 and $9,453	$	202,564	$	192,103
Accrued liabilities:
Accrued incentives	$	22,740	$	19,359
Other accrued liabilities	25,277		24,369
Total accrued liabilities	$	48,017	$	43,728