CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income	$ 107,738	$ 169,351
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	99,222	96,194
Deferred income taxes	5,035	5,287
Stock based compensation	6,470	5,912
Change in LIFO inventory reserve	(37,033)	(35,389)
Amortization of unrecognized postretirement benefits	39,133	34,320
Changes in operating assets and liabilities:
Accounts and notes receivable	(40,049)	(53,130)
Inventories	15,210	(81,817)
Other current assets	(15,878)	(7,930)
Accounts payable	(77,932)	79,692
Accrued liabilities	53,053	67,326
Other items	(31,857)	12,258
Net cash provided by operating activities	123,112	292,074
Investing activities:
Additions to property, plant and equipment	(135,412)	(123,477)
Acquisition of assets in Serbia		(18,534)
Proceeds from the sale of assets	532	754
Net cash used in investing activities	(134,880)	(141,257)
Financing activities:
Net payments on short-term debt	(6,864)	(83,501)
Additions to long-term debt	24,527	10,042
Repayments on long-term debt	(18,657)	(21,771)
Acquisition of noncontrolling shareholder interest		(71)
Payment of dividends to noncontrolling shareholders	(9,790)	(3,495)
Payment of dividends	(19,950)	(19,650)
Issuance of common shares and excess tax benefits on options	1,869	5,177
Net cash used in financing activities	(28,865)	(113,269)
Effects of exchange rate changes on cash	(1,379)	254
Changes in cash and cash equivalents	(42,012)	37,802
Cash and cash equivalents at beginning of year	351,817	233,710
Cash and cash equivalents at end of period	$ 309,805	$ 271,512