Guarantor Infromation (Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 12,147	$ 6,927
Accounts receivable - affiliates	0	0
Accounts receivable - trade	74,613	82,390
Inventories	166,683	218,130
Prepaid expenses and other current assets	22,792	21,157
Current assets of discontinued operations	94,886	98,281
Total current assets	371,121	426,885
Investment in affiliates	0	0
Net property, plant and equipment	532,917	551,163
Deferred income taxes	20,324	15,326
Goodwill	171,117	172,059
Notes receivable - affiliate	0	0
Other assets	143,131	152,613
Long-term assets of discontinued operations		103,975
Total assets	1,238,610	1,422,021
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable - affiliate	0	0
Accounts payable - trade	41,982	40,147
Short-term debt	6,465	4,772
Accrued income and other taxes	5,577	5,933
Rationalizations	210	1,195
Other accrued liabilities	29,469	20,994
Short-term liabilities of discontinued operations	16,953	23,082
Total current liabilities	100,656	96,123
Long-term debt - affiliate	0	0
Long-term debt - third party	364,132	362,455
Other long-term obligations	89,181	94,318
Deferred income taxes	46,867	57,430
Long-term liabilities of discontinued operations	867	1,167
Total stockholders' equity	636,907	810,528
Total liabilities and stockholders’ equity	1,238,610	1,422,021
Parent
ASSETS
Cash and cash equivalents	0	0
Accounts receivable - affiliates	51,592	51,592
Accounts receivable - trade	0	0
Inventories	0	0
Prepaid expenses and other current assets	0	0
Current assets of discontinued operations	0	0
Total current assets	51,592	51,592
Investment in affiliates	914,173	1,068,027
Net property, plant and equipment	0	0
Deferred income taxes	0	0
Goodwill	0	0
Notes receivable - affiliate	0	0
Other assets	0	0
Long-term assets of discontinued operations		0
Total assets	965,765	1,119,619
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable - affiliate	269	159
Accounts payable - trade	0	0
Short-term debt	0	0
Accrued income and other taxes	0	0
Rationalizations	0	0
Other accrued liabilities	7,225	2,444
Short-term liabilities of discontinued operations	0	0
Total current liabilities	7,494	2,603
Long-term debt - affiliate	48,822	38,661
Long-term debt - third party	272,542	267,827
Other long-term obligations	0	0
Deferred income taxes	0	0
Long-term liabilities of discontinued operations	0	0
Total stockholders' equity	636,907	810,528
Total liabilities and stockholders’ equity	965,765	1,119,619
Guarantors
ASSETS
Cash and cash equivalents	1,266	646
Accounts receivable - affiliates	1,729	9,803
Accounts receivable - trade	7,579	7,599
Inventories	46,972	54,613
Prepaid expenses and other current assets	9,155	7,913
Current assets of discontinued operations	82,738	81,638
Total current assets	149,439	162,212
Investment in affiliates	623,611	668,113
Net property, plant and equipment	198,577	209,633
Deferred income taxes	0	0
Goodwill	70,399	72,399
Notes receivable - affiliate	56,235	46,074
Other assets	71,126	79,367
Long-term assets of discontinued operations		99,457
Total assets	1,169,387	1,337,255
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable - affiliate	70,960	71,099
Accounts payable - trade	8,711	11,191
Short-term debt	5,824	4,636
Accrued income and other taxes	1,467	2,824
Rationalizations	195	995
Other accrued liabilities	5,879	4,847
Short-term liabilities of discontinued operations	15,504	18,384
Total current liabilities	108,540	113,976
Long-term debt - affiliate	0	0
Long-term debt - third party	90,656	93,758
Other long-term obligations	55,091	60,508
Deferred income taxes	249	248
Long-term liabilities of discontinued operations	678	738
Total stockholders' equity	914,173	1,068,027
Total liabilities and stockholders’ equity	1,169,387	1,337,255
Non-Guarantors
ASSETS
Cash and cash equivalents	10,881	6,281
Accounts receivable - affiliates	19,372	19,505
Accounts receivable - trade	67,034	74,791
Inventories	119,711	163,517
Prepaid expenses and other current assets	13,637	13,244
Current assets of discontinued operations	18,068	17,520
Total current assets	248,703	294,858
Investment in affiliates	0	0
Net property, plant and equipment	334,340	341,530
Deferred income taxes	20,324	15,326
Goodwill	100,718	99,660
Notes receivable - affiliate	0	0
Other assets	72,005	73,246
Long-term assets of discontinued operations		4,518
Total assets	776,090	829,138
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable - affiliate	1,464	9,642
Accounts payable - trade	33,271	28,956
Short-term debt	641	136
Accrued income and other taxes	4,110	3,109
Rationalizations	15	200
Other accrued liabilities	16,365	13,703
Short-term liabilities of discontinued operations	7,369	5,575
Total current liabilities	63,235	61,321
Long-term debt - affiliate	7,413	7,413
Long-term debt - third party	934	870
Other long-term obligations	34,090	33,810
Deferred income taxes	46,618	57,182
Long-term liabilities of discontinued operations	189	429
Total stockholders' equity	623,611	668,113
Total liabilities and stockholders’ equity	776,090	829,138
Consolidating Entries and Eliminations
ASSETS
Cash and cash equivalents	0	0
Accounts receivable - affiliates	(72,693)	(80,900)
Accounts receivable - trade	0	0
Inventories	0	0
Prepaid expenses and other current assets	0	0
Current assets of discontinued operations	(5,920)	(877)
Total current assets	(78,613)	(81,777)
Investment in affiliates	(1,537,784)	(1,736,140)
Net property, plant and equipment	0	0
Deferred income taxes	0	0
Goodwill	0	0
Notes receivable - affiliate	(56,235)	(46,074)
Other assets	0	0
Long-term assets of discontinued operations		0
Total assets	(1,672,632)	(1,863,991)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable - affiliate	(72,693)	(80,900)
Accounts payable - trade	0	0
Short-term debt	0	0
Accrued income and other taxes	0	0
Rationalizations	0	0
Other accrued liabilities	0	0
Short-term liabilities of discontinued operations	(5,920)	(877)
Total current liabilities	(78,613)	(81,777)
Long-term debt - affiliate	(56,235)	(46,074)
Long-term debt - third party	0	0
Other long-term obligations	0	0
Deferred income taxes	0	0
Long-term liabilities of discontinued operations	0	0
Total stockholders' equity	(1,537,784)	(1,736,140)
Total liabilities and stockholders’ equity	$ (1,672,632)	$ (1,863,991)