Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Current assets
Cash and cash equivalents	$ 221,196	$ 251,208	$ 165,275
Trade accounts receivable, net	137,803	90,017	126,888
Inventories	219,036	197,728	196,247
Deferred income taxes	13,625	12,699	12,874
Assets held for sale	0	0	586
Other current assets	12,503	16,454	8,465
Total current assets	604,163	568,106	510,335
Property, plant and equipment, net	206,563	209,533	209,544
Goodwill	129,231	129,218	122,678
Intangible assets, net	38,056	41,773	48,725
Other noncurrent assets	5,321	4,983	5,703
Total assets	983,334	953,613	896,985
Current liabilities
Line of credit and notes payable	62	103	1,201
Trade accounts payable	27,119	34,933	29,579
Accrued liabilities	56,490	51,745	44,619
Income taxes payable	1,734	0	0
Accrued profit sharing trust contributions	3,416	5,784	3,229
Accrued cash profit sharing and commissions	12,205	6,049	12,010
Accrued workers’ compensation	4,429	4,591	5,095
Total current liabilities	105,455	103,205	95,733
Deferred income tax and other long-term liabilities	12,603	9,129	8,221
Total liabilities	118,058	112,334	103,954
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock, at par value	489	486	485
Additional paid-in capital	213,037	207,418	187,549
Retained earnings	634,858	615,289	609,538
Treasury stock	0	0	(9,825)
Accumulated other comprehensive income	16,892	18,086	5,284
Total stockholders’ equity	865,276	841,279	793,031
Total liabilities and stockholders’ equity	$ 983,334	$ 953,613	$ 896,985