Balance Sheet Details (Tables)

6 Months Ended

Jun. 30, 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)	June 30, 2016		December 31, 2015
Accounts receivable:
Trade receivables	$	90,566	$	91,324
Other receivables	2,721		3,055
Total accounts receivable, less allowances of $6,429 and $7,066	$	93,287	$	94,379
Inventories:
Finished goods	$	171,408	$	159,998
Work in process	1,610		1,183
Raw materials	4,535		4,944
Repair parts	10,915		10,763
Operating supplies	1,099		1,139
Total inventories, less loss provisions of $12,314 and $5,313	$	189,567	$	178,027
Accrued liabilities:
Accrued incentives	$	31,325	$	21,450
Other accrued liabilities	21,178		23,729
Total accrued liabilities	$	52,503	$	45,179