CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 9,661	$ 10,128
Trade receivables - net of allowances for uncollectible accounts - 2012 - $606 and 2010 - $464	45,599	40,550
Employee receivables	177	154
Other receivables	2,795	1,750
Inventories	70,455	69,911
Prepaid expenses	4,436	3,775
Prepaid income taxes	891	883
Deferred income tax assets	3,707	3,704
Income tax refund receivable	1,310	2,797
Total current assets	139,031	133,652
PROPERTY AND EQUIPMENT:
Land and land improvements	16,288	16,288
Buildings	62,060	59,905
Manufacturing equipment	104,555	103,629
Furniture and fixtures	23,348	22,559
Leasehold improvements	12,795	12,659
Construction-in-progress	59,800	47,534
Total property and equipment	278,846	262,574
Less accumulated depreciation	(86,138)	(83,434)
Property and equipment-net	192,708	179,140
OTHER ASSETS:
Goodwill	65,574	61,144
Deferred income tax assets	5,365	5,366
Marketable securities	3,064	2,798
Other assets	8,684	8,248
Total other assets	157,664	134,225
TOTAL	489,403	447,017
CURRENT LIABILITIES:
Trade payables	22,880	22,727
Other Payables	7,500	0
Accrued expenses	20,958	20,197
Advances from employees	644	225
Income taxes payable	733	646
Total current liabilities	52,715	43,795
LONG-TERM DEBT	52,524	30,737
DEFERRED INCOME TAX LIABILITIES	2,166	2,112
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	3,489	3,489
DEFERRED COMPENSATION PAYABLE	5,066	4,585
DEFERRED CREDITS	1,960	1,984
OTHER LONG-TERM OBLIGATIONS	7,692	3,226
Total liabilities	125,612	89,928
STOCKHOLDERS' EQUITY:
Preferred stock-5,000 shares authorized as of March 31, 2012 and December 31, 2011; no shares issued	0	0
Common stock, no par value; shares authorized — 2011 and 2010 - 100,000; issued shares as of December 31, 2011 - 42,008 and December 31, 2010 - 35,496	166,908	166,231
Retained earnings	196,456	190,708
Accumulated other comprehensive income	427	150
Total stockholders' equity	363,791	357,089
TOTAL	489,403	447,017
Developed Technology Rights [Member]
OTHER ASSETS:
Intangible Assets	50,755	35,415
Other Intangible Assets [Member]
OTHER ASSETS:
Intangible Assets	$ 24,222	$ 21,254