Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 347,370	$ 336,164	[1]
Investment securities	36,351	41,233	[1]
Total cash, cash equivalents and investment securities	383,721	377,397	[1]
Accounts receivable, net of allowance for doubtful accounts of $1,131 at March 31, 2016 and $1,101 at December 31, 2015	55,674	57,847	[1]
Inventories	49,240	43,632	[1]
Prepaid income taxes	11,297	14,366	[1]
Prepaid expenses and other current assets	11,198	7,631	[1]
Assets held-for-sale	4,304	4,134	[1]
Total current assets	515,434	505,007	[1]
PROPERTY AND EQUIPMENT, net	74,635	74,320	[1]
GOODWILL	6,463	6,463	[1]
INTANGIBLE ASSETS, net	23,476	23,936	[1]
DEFERRED INCOME TAXES	15,949	17,099	[1]
TOTAL ASSETS	635,957	626,825	[1]
CURRENT LIABILITIES:
Accounts payable	12,678	13,670	[1]
Accrued liabilities	21,328	28,948	[1]
Total current liabilities	34,006	42,618	[1]
LONG-TERM LIABILITIES	1,380	1,476	[1]
DEFERRED INCOME TAXES	3,170	1,372	[1]
INCOME TAX LIABILITY	1,488	1,488	[1]
COMMITMENTS AND CONTINGENCIES	0	0
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 16,175 shares at March 31, 2016 and 16,086 shares at December 31, 2015; Outstanding 16,074 shares at March 31, 2016 and 16,086 shares at December 31, 2015	1,618	1,608	[1]
Additional paid-in capital	150,090	145,125	[1]
Treasury Stock, at cost - 101 shares at March 31, 2016 and 0 shares at December 31, 2015	(8,933)	0	[1]
Retained earnings	469,797	453,896	[1]
Accumulated other comprehensive loss	(16,659)	(20,758)	[1]
Total stockholders' equity	595,913	579,871	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	635,957	626,825	[1]
Allowance for doubtful accounts	$ 1,131	$ 1,101
Convertible preferred stock, par value	$ 1.00	$ 1.00
Convertible preferred stock, authorized shares	500,000	500,000
Convertible preferred stock, issued shares	0	0
Convertible preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	16,175,000	15,595,000
Common stock, shares outstanding	16,074,000	15,595,000
Treasury Stock, Shares	101,000	0

[1] December 31, 2015 balances were derived from audited consolidated financial statements.