CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 208,379	$ 222,666
Accounts receivable, net	152,373	163,547
Inventories	121,410	112,739
Deferred income taxes	13,864	13,873
Prepaid expenses and other current assets	11,868	9,659
Total current assets	507,894	522,484
Property, plant and equipment, net	415,344	418,830
Intangibles	559	616
Goodwill	78,944	78,890
Income taxes receivable and deferred	116,205	119,612
Other assets	27,565	26,456
Total assets	1,146,511	1,166,888
LIABILITIES AND SHAREHOLDERS' EQUITY
Notes and loans payable	797	625
Accounts payable	35,134	36,397
Accrued liabilities	99,473	112,331
Current maturities of long-term debt	2,514	3,764
Income taxes payable and deferred	3,678	5,391
Total current liabilities	141,596	158,508
Long-term debt	299,108	300,111
Other noncurrent liabilities	102,720	106,014
Deferred taxes and other credits	53,707	54,476
Total liabilities	597,131	619,109
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	417,434	416,728
Retained earnings	440,446	434,598
Accumulated items of other comprehensive income:
Translation adjustments	(5,737)	(138)
Pension and postretirement liability adjustments	(47,881)	(48,383)
Derivative valuation adjustment	(905)	(977)
Treasury stock (Class A), at cost 8,463,635 shares in 2014 and 2013	(257,571)	(257,571)
Total Company shareholders' equity	545,826	544,297
Noncontrolling interest	3,554	3,482
Total equity	549,380	547,779
Total liabilities and shareholders' equity	1,146,511	1,166,888
Common Class A [Member]
SHAREHOLDERS' EQUITY
Common Stock	37	37
Common Class B [Member]
SHAREHOLDERS' EQUITY
Common Stock	$ 3	$ 3