CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 31,518	$ 26,751
Customer receivables, net of allowance for doubtful accounts of $431 and $549 in 2013 and 2012, respectively	82,894	56,888
Other receivables	8,784	7,708
Inventories	57,453	61,192
Deferred income taxes	4,592	4,591
Prepaid expenses and other current assets	10,615	5,584
Total current assets	195,856	162,714
PROPERTY, PLANT AND EQUIPMENT, net	248,571	267,377
OTHER ASSETS:
Goodwill	100,697	100,697
Other intangible assets, net	131,907	134,180
Deferred financing costs, net of accumulated amortization of $4,554 and $4,127 in 2013 and 2012, respectively	6,313	6,741
Deferred income taxes	5,052	5,052
Other	1,263	1,055
TOTAL	689,659	677,816
CURRENT LIABILITIES:
Accounts payable	71,445	59,181
Accrued payroll and compensation	11,001	10,726
Accrued interest payable	5,204	12,543
Accrued workers compensation	5,040	5,868
Accrued and other liabilities	17,310	18,443
Total current liabilities	110,000	106,761
LONG-TERM DEBT	349,395	324,133
DEFERRED INCOME TAXES	19,707	19,021
NON-CURRENT INCOME TAXES PAYABLE	8,211	8,211
OTHER POSTRETIREMENT BENEFIT PLAN LIABILITY	83,095	82,689
PENSION BENEFIT PLAN LIABILITY	54,479	56,438
OTHER LIABILITIES	14,924	15,690
COMMITMENTS AND CONTINGENCIES (Note 5)
STOCKHOLDERS' EQUITY:
Preferred Stock, $0.01 par value; 10,000,000 shares authorized	0	0
Common Stock, $0.01 par value; 80,000,000 shares authorized, 47,475,570 and 47,419,115 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively, and additional paid-in-capital	438,868	438,277
Accumulated other comprehensive loss	(51,503)	(51,834)
Accumulated deficiency	(337,517)	(321,570)
Total stockholders' equity	49,848	64,873
TOTAL	$ 689,659	$ 677,816