Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Net income	$ 104,437	$ 86,640
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	65,510	64,111
Deferred income taxes	137	2,739
Stock based compensation	4,461	3,671
Change in LIFO inventory reserve	(18,219)	17,296
Amortization of unrecognized postretirement benefits	24,664	22,875
Changes in operating assets and liabilities:
Accounts and notes receivable	(67,586)	(67,947)
Inventories	(74,142)	(120,323)
Other current assets	(14,485)	(9,604)
Accounts payable	(38,820)	88,872
Accrued liabilities	8,526	32,816
Other items	(8,454)	18,441
Net cash provided by (used in) operating activities	(13,971)	139,587
Investing activities:
Additions to property, plant and equipment	(93,077)	(77,869)
Acquisition of assets in Serbia		(18,534)
Proceeds from the sale of assets	457	619
Net cash used in investing activities	(92,620)	(95,784)
Financing activities:
Net issuance of (payments on) short-term debt	14,186	(11,805)
Additions to long-term debt	19,577	10,073
Repayments on long-term debt	(9,916)	(17,080)
Acquisition of noncontrolling shareholder interest		(71)
Payment of dividends to noncontrolling shareholders	(9,709)	(3,495)
Payment of dividends	(13,296)	(13,089)
Issuance of common shares and excess tax benefits on options	1,594	301
Net cash used in financing activities	2,436	(35,166)
Effects of exchange rate changes on cash	(3,509)	(1,846)
Changes in cash and cash equivalents	(107,664)	6,791
Cash and cash equivalents at beginning of year	351,817	233,710
Cash and cash equivalents at end of period	$ 244,153	$ 240,501