Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 147,182	$ 114,781
Accounts receivable, net	36,931	34,433
Inventories	20,311	18,637
Prepaid expenses	1,869	2,793
Prepaid income taxes	0	4,142
Deferred income taxes	579	556
Other current assets	580	398
Total current assets	207,452	175,740
Property, plant and equipment, net	47,468	44,282
Goodwill	28,515	28,515
Intangible assets with finite lives, net	19,747	22,706
Other assets	474	474
Total assets	303,656	271,717
Current liabilities:
Trade accounts payable	11,906	11,526
Accrued expenses	11,218	8,435
Accrued compensation and other benefits	3,129	4,328
Dividends payable	0	5,237
Income taxes payable	2,081	0
Current portion of long-term debt	0	1,387
Total current liabilities	28,334	30,913
Deferred income taxes	4,853	5,984
Other long-term obligations	3,187	2,811
Total liabilities	36,374	39,708
Commitments and contingencies (note 12)
Stockholders' equity:
Preferred stock, $25 par value. Authorized 2,000,000 shares; none issued and outstanding	0	0
Common stock, $.0667 par value. Authorized 60,000,000 shares; 29,356,818 shares issued and outstanding at September 30, 2012 and 29,165,721 shares issued and outstanding at December 31, 2011	1,957	1,944
Additional paid-in capital	55,178	49,933
Retained earnings	211,184	181,070
Accumulated other comprehensive loss	(1,037)	(938)
Total stockholders' equity	267,282	232,009
Total liabilities and stockholders' equity	$ 303,656	$ 271,717