Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flow from operating activities:
Net income (loss)	$ 59,246	$ 29,924	$ 34,871
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	41,836	36,306	35,906
Undistributed losses (earnings) from affiliates and joint ventures	(3,931)	11,754	691
Increase (decrease) in allowance for doubtful accounts	4,397	277	(139)
Decrease (increase) in deferred income taxes	7,119	3,863	3,690
Tax benefit from employee stock plans	593	285	730
(Gain) loss on sale of depreciable assets	(807)	214	(422)
Impairment charge	110	1,045	1,980
Stock compensation expense	4,885	4,535	2,570
Excess tax benefits on stock option exercises	(716)	(436)	(639)
Other	229	(85)	(768)
(Increase) decrease in current assets, net of effects of acquisitions:
Accounts receivable	(36,919)	(47,583)	38,649
Income taxes receivable	1,594	(6,226)	1,073
Inventories	(46,977)	(11,511)	26,033
Prepaid expenses	(4,107)	2,853	(40)
Other assets	(60)	0	0
Increase (decrease) in current liabilities, net of effects of acquisitions:
Accounts payable	9,205	13,220	(1,251)
Accrued liabilities and income taxes	4,235	9,398	(11,268)
(Increase) decrease in other noncurrent assets	(736)	(3,977)	(7,590)
Increase (decrease) in other noncurrent liabilities	(566)	4,244	(1,709)
Net cash provided by operating activities	38,630	48,100	122,367
Cash flow from investing activities:
Proceeds from sale of depreciable assets	1,913	841	2,988
Proceeds from sale of corporate building			9,651
Capital expenditures	(61,029)	(47,305)	(50,767)
Capital expenditures - corporate building			(9,651)
Investments in and advances to affiliates and joint ventures	(3,387)	(2,073)	(1,387)
Proceeds from sale of interests in affiliates and businesses	6,146
Acquisition of businesses, net of cash acquired		(400)	(650)
Receipts from (advances to) Chrome Corp			6,000
Other	1,667	847	(216)
Net cash used in investing activities	(54,690)	(48,090)	(44,032)
Cash flow from financing activities:
Proceeds from issuance of debt	1,344,967	1,228,952	540,139
Principal payments of debt	(1,319,673)	(1,201,281)	(592,486)
Purchase of noncontrolling interest		(11,873)
Proceeds from exercise of stock awards	8,308	5,346	2,500
Excess tax benefits on stock option exercises	716	436	639
Dividends	(22,762)	(22,358)	(22,052)
Net cash provided by (used in) financing activities	11,556	(778)	(71,260)
Effect of foreign currency rate changes on cash	940	361	1,153
Net increase (decrease) in cash and cash equivalents	(3,564)	(407)	8,228
Cash and cash equivalents at the beginning of the year	27,262	27,669	19,441
Cash and cash equivalents at end of the year	23,698	27,262	27,669
Cash paid for:
Interest, net	9,798	9,223	12,281
Income taxes, net	$ 9,610	$ 18,843	$ 2,506