Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2016

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)	March 31, 2016		December 31, 2015
Accounts receivable:
Trade receivables	$	84,203	$	91,324
Other receivables	3,698		3,055
Total accounts receivable, less allowances of $6,063 and $7,066	$	87,901	$	94,379
Inventories:
Finished goods	$	173,597	$	159,998
Work in process	1,619		1,183
Raw materials	4,497		4,944
Repair parts	11,057		10,763
Operating supplies	1,180		1,139
Total inventories, less loss provisions of $5,533 and $5,313	$	191,950	$	178,027
Accrued liabilities:
Accrued incentives	$	20,865	$	21,450
Other accrued liabilities	21,680		23,729
Total accrued liabilities	$	42,545	$	45,179