Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 87,368	$ 78,850
Investment securities	33,444	14,507	[1]
Cash, cash equivalents and investment securities	120,812	93,357	[1]
Accounts receivable, net of allowance for doubtful accounts of $1,232 at June 30, 2011 and $742 at December 31, 2010	51,789	55,106	[1]
Inventories	49,372	44,056	[1]
Prepaid income taxes	4,468	687	[1]
Prepaid expenses and other current assets	7,443	9,574	[1]
Deferred income taxes	4,991	5,053	[1]
Total current assets	238,875	207,833	[1]
PROPERTY AND EQUIPMENT, net	87,561	83,545	[1]
GOODWILL	1,478	1,478	[1]
INTANGIBLE ASSETS, net	13,780	14,806	[1]
DEFERRED INCOME TAXES	4,635	4,564	[1]
TOTAL ASSETS	346,329	312,226	[1]
CURRENT LIABILITIES:
Accounts payable	12,308	10,879	[1]
Accrued liabilities	14,471	14,629	[1]
Deferred revenue	0	254	[1]
Total current liabilities	26,779	25,762	[1]
COMMITMENTS AND CONTINGENCIES	0	0	[1]
DEFERRED INCOME TAXES	7,974	8,023	[1]
INCOME TAX LIABILITY	4,471	4,155	[1]
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $1.00 par value Authorized-500 shares; Issued and outstanding - none	0	0	[1]
Common stock, $0.10 par value - Authorized-80,000 shares; Issued 14,855 shares at June 30, 2011 and December 31, 2010, outstanding 13,963 shares at June 30, 2011 and 13,659 shares at December 31, 2010	1,486	1,486	[1]
Additional paid-in capital	56,377	56,502	[1]
Treasury stock, at cost - 892 shares at June 30, 2011 and 1,196 shares at December 31, 2010	(31,126)	(41,428)	[1]
Retained earnings	276,356	258,790	[1]
Accumulated other comprehensive income (loss)	4,012	(1,064)	[1]
Total stockholders' equity	307,105	274,286	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 346,329	$ 312,226	[1]

[1] December 31, 2010 balances were derived from audited consolidated financial statements.