Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 355,368	$ 275,812
Investment securities	38,695	70,952	[1]
Cash, cash equivalents and investment securities	394,063	346,764	[1]
Accounts receivable, net of allowance for doubtful accounts of $1,123 at September 30, 2015 and $1,127 at December 31, 2014	49,242	39,051	[1]
Inventories	40,681	36,933	[1]
Prepaid income taxes	8,798	3,963	[1]
Prepaid expenses and other current assets	14,379	5,818	[1]
Deferred income taxes	6,534	4,683	[1]
Total current assets	513,697	437,212	[1]
PROPERTY AND EQUIPMENT, net	78,768	86,091	[1]
GOODWILL	1,478	1,478	[1]
INTANGIBLE ASSETS, net	6,365	7,063	[1]
DEFERRED INCOME TAXES	9,920	9,258	[1]
TOTAL ASSETS	610,228	541,102	[1]
CURRENT LIABILITIES:
Accounts payable	14,732	11,378	[1]
Accrued liabilities	22,471	17,350	[1]
Total current liabilities	37,203	28,728	[1]
LONG-TERM LIABILITIES	1,566	0
DEFERRED INCOME TAXES	3,069	1,376	[1]
INCOME TAX LIABILITY	1,222	2,746	[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 and outstanding 15,951 shares at June 30, 2015 and 15,595 shares at December 31, 2014	1,595	1,559	[1]
Additional paid-in capital	134,413	107,336	[1]
Retained earnings	448,433	408,911	[1]
Accumulated other comprehensive loss	(17,273)	(9,554)	[1]
Total stockholders' equity	567,168	508,252	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	610,228	541,102	[1]
Allowance for doubtful accounts	$ 1,123	$ 1,127
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	15,951,000	15,595,000
Common stock, shares outstanding	15,951,000	15,595,000

[1] December 31, 2014 balances were derived from audited consolidated financial statements.