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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Current assets      
Cash and cash equivalents $ 162,719 $ 213,817 $ 262,013
Trade accounts receivable, net 120,119 76,420 117,975
Inventories 185,217 180,129 166,934
Deferred income taxes 12,124 11,774 10,884
Assets held for sale   6,793 6,792
Other current assets 14,516 13,131 8,813
Total current assets 494,695 502,064 573,411
Property, plant and equipment, net 208,685 195,716 183,698
Goodwill 127,983 99,849 72,111
Intangible assets, net 41,529 27,856 22,051
Equity method investment     839
Other noncurrent assets 6,013 10,602 12,465
Total assets 878,905 836,087 864,575
Current liabilities      
Line of credit and notes payable 4,837    
Trade accounts payable 34,740 22,034 32,060
Accrued liabilities 41,491 36,156 36,067
Income taxes payable 1,396   3,054
Accrued profit sharing trust contributions 2,393 4,477 2,997
Accrued cash profit sharing and commissions 10,307 3,446 13,036
Accrued workers' compensation 4,861 5,474 5,663
Total current liabilities 100,025 71,587 92,877
Long-term liabilities 5,936 6,137 7,246
Total liabilities 105,961 77,724 100,123
Commitments and contingencies (Note 7)         
Stockholders' equity      
Common stock, at par value 482 481 482
Additional paid-in capital 176,809 170,483 167,862
Retained earnings 591,595 580,616 571,229
Accumulated other comprehensive income 4,058 6,783 24,879
Total stockholders' equity 772,944 758,363 764,452
Total liabilities and stockholders' equity $ 878,905 $ 836,087 $ 864,575