Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Current assets
Cash and cash equivalents	$ 262,013	$ 335,049	$ 219,763
Trade accounts receivable, net	117,975	68,256	104,284
Inventories	166,934	152,297	150,786
Deferred income taxes	10,884	10,189	19,257
Assets held for sale	6,792	10,787	40,457
Other current assets	8,813	14,678	10,224
Total current assets	573,411	591,256	544,771
Property, plant and equipment, net	183,698	177,072	184,949
Goodwill	72,111	70,069	72,163
Intangible assets, net	22,051	23,466	23,156
Equity method investment	839	213	473
Other noncurrent assets	12,465	12,633	17,005
Total assets	864,575	874,709	842,517
Current liabilities
Trade accounts payable	32,060	35,164	27,906
Accrued liabilities	36,067	31,372	31,192
Liabilities held for sale			2,739
Income taxes payable	3,054		760
Accrued profit sharing trust contributions	2,997	5,591	3,540
Accrued cash profit sharing and commissions	13,036	2,805	9,264
Accrued workers' compensation	5,663	4,684	4,386
Total current liabilities	92,877	79,616	79,787
Long-term liabilities	7,246	7,300	9,263
Total liabilities	100,123	86,916	89,050
Commitments and contingencies (Note 8)
Stockholders' equity
Common stock, at par value	482	500	494
Additional paid-in capital	167,862	165,425	147,745
Retained earnings	571,229	607,241	604,479
Accumulated other comprehensive income	24,879	14,627	749
Total stockholders' equity	764,452	787,793	753,467
Total liabilities and stockholders' equity	$ 864,575	$ 874,709	$ 842,517