Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net income	$ 28,050	$ 18,477
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	31,769	29,658
Amortization	335	337
Deferred income taxes	2,506	993
Stock based compensation	1,391	979
Change in LIFO inventory reserve	8,801	60,448
Amortization of unrecognized postretirement benefits	11,427	8,829
Loss on sale of assets		2,694
Changes in operating assets and liabilities:
Accounts and notes receivable	(56,638)	(43,827)
Inventories	(30,477)	(136,086)
Other current assets	(9,273)	4,914
Accounts payable	67,940	12,506
Accrued liabilities	28,769	29,485
Other items	(2,377)	(30,866)
Net cash provided by (used in) operating activities	82,223	(41,459)
Investing activities:
Additions to property, plant and equipment	(37,062)	(35,903)
Acquisition of businesses, net of cash acquired		(17,380)
Acquisition of assets in Serbia	(18,534)
Proceeds from the sale of assets		3,450
Net cash used in investing activities	(55,596)	(49,833)
Financing activities:
Net borrowings of (payments on) short-term debt	8,317	(20,822)
Additions to long-term debt	6,927	7,625
Repayments of long-term debt	(11,445)
Acquisition of noncontrolling shareholder interest		(116,500)
Payment of dividends	(6,543)	(6,514)
Issuance of common shares and excess tax benefits on options	176	2,790
Net cash used in financing activities	(2,568)	(133,421)
Effects of exchange rate changes on cash	(125)	(161)
Changes in cash and cash equivalents	23,934	(224,874)
Cash and cash equivalents at beginning of year	233,710	413,359
Cash and cash equivalents at end of period	$ 257,644	$ 188,485