Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 175,553	$ 213,817
Trade accounts receivable, net	82,812	76,420
Inventories	204,124	180,129
Deferred income taxes	11,473	11,774
Assets held for sale	593	6,793
Other current assets	23,499	13,131
Total current assets	498,054	502,064
Property, plant and equipment, net	213,452	195,716
Goodwill	121,981	99,849
Intangible assets	50,598	27,856
Deferred income taxes		2,851
Other noncurrent assets	6,237	7,751
Total assets	890,322	836,087
Current liabilities
Line of credit and notes payable	178
Trade accounts payable	37,117	22,034
Accrued liabilities	44,923	36,156
Accrued profit sharing trust contributions	5,191	4,477
Accrued cash profit sharing and commissions	3,414	3,446
Accrued workers' compensation	4,692	5,474
Total current liabilities	95,515	71,587
Long-term liabilities	5,239	6,137
Total liabilities	100,754	77,724
Commitments and contingencies (Note 9)
Stockholders' equity
Preferred stock, par value $0.01; authorized shares, 5,000; issued and outstanding shares, none
Common stock, par value $0.01; authorized shares, 160,000; issued and outstanding shares, 48,422 and 48,163 at December 31, 2012 and 2011, respectively	483	481
Additional paid-in capital	184,677	170,483
Retained earnings	592,309	580,616
Accumulated other comprehensive income	12,099	6,783
Total stockholders' equity	789,568	758,363
Total liabilities and stockholders' equity	$ 890,322	$ 836,087