Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 222,666	$ 190,718
Accounts receivable, net	163,547	171,535
Inventories	112,739	119,183
Deferred income taxes	13,873	20,594
Prepaid expenses and other current assets	9,659	10,435
Total current assets	522,484	512,465
Property, plant and equipment, net	418,830	420,154
Intangibles	616	848
Goodwill	78,890	76,522
Income taxes receivable and deferred	119,612	123,886
Other assets	26,456	22,822
Total assets	1,166,888	1,156,697
Current liabilities:
Notes and loans payable	625	586
Accounts payable	36,397	35,117
Accrued liabilities	112,331	103,257
Current maturities of long-term debt	3,764	83,276
Income taxes payable and deferred	5,391	13,552
Total current liabilities	158,508	235,788
Long-term debt	300,111	235,877
Other noncurrent liabilities	106,014	136,012
Deferred taxes and other credits	54,476	55,509
Total liabilities	619,109	663,186
Commitments and Contingencies
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	416,728	395,381
Retained earnings	434,598	435,775
Accumulated items of other comprehensive income:
Translation adjustments	(138)	(7,659)
Pension and postretirement liability adjustments	(48,383)	(69,484)
Derivative valuation adjustment	(977)	(2,878)
Treasury stock (Class A), at cost; 8,463,635 shares in 2013 and 8,467,873 shares in 2012	(257,571)	(257,664)
Total Company shareholders' equity	544,297	493,511
Noncontrolling interest	3,482
Total Equity	547,779	493,511
Total liabilities and shareholders' equity	1,166,888	1,156,697
Common Class A [Member]
Shareholders' Equity
Common Stock	37	37
Common Class B [Member]
Shareholders' Equity
Common Stock	$ 3	$ 3