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)	$ 58,536	[1]	$ 28,483	[1]	$ 31,937	[1]
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	42,132	[1]	36,342	[1]	36,731	[1]
Undistributed losses (earnings) from affiliates and joint ventures	(3,599)	[1]	11,490	[1]	800	[1]
Increase (decrease) in allowance for doubtful accounts	5,058	[1]	301	[1]	438	[1]
Decrease (increase) in deferred income taxes	6,763	[1]	5,205	[1]	2,554	[1]
Tax benefit from employee stock plans	593	[1]	285	[1]	730	[1]
(Gain) loss on sale of depreciable assets	(807)	[1]	214	[1]	(422)	[1]
Impairment charge	110	[1]	1,045	[1]	1,980	[1]
Stock compensation expense	4,885	[1]	4,535	[1]	2,570	[1]
Excess tax benefits on stock option exercises	(716)	[1]	(436)	[1]	(639)	[1]
Other	612	[1]	(382)	[1]	(659)	[1]
(Increase) decrease in current assets, net of effects of acquisitions:
Accounts receivable	(37,153)	[1]	(45,654)	[1]	39,766	[1]
Income taxes receivable	245	[1]	(6,751)	[1]	1,636	[1]
Inventories	(46,140)	[1]	(11,262)	[1]	26,400	[1]
Prepaid expenses	(3,614)	[1]	3,194	[1]	(400)	[1]
Other assets	(59)	[1]	0	[1]	0	[1]
Increase (decrease) in current liabilities, net of effects of acquisitions:
Accounts payable	9,952	[1]	12,561	[1]	(1,149)	[1]
Accrued liabilities and income taxes	4,428	[1]	9,186	[1]	(10,210)	[1]
(Increase) decrease in other noncurrent assets	(643)	[1]	(4,388)	[1]	(8,132)	[1]
Increase (decrease) in other noncurrent liabilities	(1,315)	[1]	4,302	[1]	(1,564)	[1]
Net cash provided by operating activities	39,268	[1]	48,270	[1]	122,367	[1]
Cash flow from investing activities:
Proceeds from sale of depreciable assets	1,913	[1]	841	[1]	2,988	[1]
Proceeds from sale of corporate building	0	[1]	0	[1]	9,651	[1]
Capital expenditures	(61,029)	[1]	(47,305)	[1]	(50,767)	[1]
Capital expenditures - corporate building	0	[1]	0	[1]	(9,651)	[1]
Investments in and advances to affiliates and joint ventures	(2,933)	[1]	(2,722)	[1]	(1,387)	[1]
Proceeds from sale of interests in affiliates and businesses	6,211	[1]	0	[1]	0	[1]
Acquisition of businesses, net of cash acquired	0	[1]	(400)	[1]	(650)	[1]
Receipts from (advances to) Chrome Corp	0	[1]	0	[1]	6,000	[1]
Other	1,666	[1]	847	[1]	(216)	[1]
Net cash used in investing activities	(54,172)	[1]	(48,739)	[1]	(44,032)	[1]
Cash flow from financing activities:
Proceeds from issuance of debt	1,344,967	[1]	1,228,952	[1]	540,139	[1]
Principal payments of debt	(1,319,673)	[1]	(1,201,281)	[1]	(592,486)	[1]
Purchase of noncontrolling interest	0	[1]	(11,873)	[1]	0	[1]
Proceeds from exercise of stock awards	8,091	[1]	5,346	[1]	2,500	[1]
Excess tax benefits on stock option exercises	716	[1]	436	[1]	639	[1]
Dividends	(22,762)	[1]	(22,358)	[1]	(22,052)	[1]
Net cash provided by (used in) financing activities	11,339	[1]	(778)	[1]	(71,260)	[1]
Effect of foreign currency rate changes on cash	873	[1]	386	[1]	1,153	[1]
Net increase (decrease) in cash and cash equivalents	(2,692)	[1]	(861)	[1]	8,228	[1]
Cash and cash equivalents at the beginning of the year	26,808	[1]	27,669	[1]	19,441	[1]
Cash and cash equivalents at end of the year	24,116	[1]	26,808	[1]	27,669	[1]
Cash paid for:
Interest, net	9,798	[1]	9,223	[1]	12,281	[1]
Income taxes, net	$ 9,610	[1]	$ 18,843	[1]	$ 2,506	[1]

[1] Restated