CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 197,321	$ 190,718
Accounts receivable, net	174,881	171,535
Inventories	117,443	119,183
Income taxes receivable and deferred	20,298	20,594
Prepaid expenses and other current assets	12,311	10,435
Total current assets	522,254	512,465
Property, plant and equipment, net	406,845	420,154
Intangibles	733	848
Goodwill	75,688	76,522
Deferred taxes	125,549	123,886
Other assets	26,875	22,822
Total assets	1,157,944	1,156,697
LIABILITIES AND SHAREHOLDERS' EQUITY
Notes and loans payable	610	586
Accounts payable	34,032	35,117
Accrued liabilities	130,269	103,257
Current maturities of long-term debt	55,014	83,276
Income taxes payable and deferred	7,795	13,552
Total current liabilities	227,720	235,788
Long-term debt	265,368	235,877
Other noncurrent liabilities	131,808	136,012
Deferred taxes and other credits	52,771	55,509
Total liabilities	677,667	663,186
SHAREHOLDERS' EQUITY
Preferred stock, par value $5.00 per share; authorized 2,000,000 shares; none issued
Common Stock	40	40
Additional paid-in capital	397,606	395,381
Retained earnings	430,736	435,775
Accumulated items of other comprehensive income:
Translation adjustments	(22,153)	(7,659)
Pension and postretirement liability adjustments	(67,255)	(69,484)
Derivative valuation adjustment	(1,126)	(2,878)
Treasury stock (Class A), at cost 8,463,635 shares in 2013 and 8,467,873 in 2012	(257,571)	(257,664)
Total shareholders' equity	480,277	493,511
Total liabilities and shareholders' equity	1,157,944	1,156,697
Common Class A [Member]
SHAREHOLDERS' EQUITY
Common Stock	37	37
Common Class B [Member]
SHAREHOLDERS' EQUITY
Common Stock	$ 3	$ 3