Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 195,608	$ 126,364
Available for sale securities	88,021	120,280
Accrued interest receivable	895	1,279
Accounts receivable, net of allowances of approximately $16.1 million and $15.5 million at June 30, 2011 and December 31, 2010, respectively	67,008	46,551
Inventory	29,161	25,343
Prepaid expenses and other current assets	8,908	4,804
Total current assets	389,601	324,621
Fixed assets, net	19,298	20,662
Intangible assets, net	81,740	82,925
Goodwill	14,671	14,671
Restricted cash	5,783	5,778
Deferred tax assets, net	27,286	25,197
Other assets	296	270
Total assets	538,675	474,124
Current liabilities:
Accounts payable	17,269	8,594
Accrued expenses	86,156	76,242
Deferred revenue	416	534
Total current liabilities	103,841	85,370
Contingent purchase price	27,416	25,387
Other liabilities	5,854	5,769
Total liabilities	137,111	116,526
Stockholders' equity:
Preferred stock, $1.00 par value per share, 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value per share, 125,000,000 shares authorized; 54,003,475 and 53,464,145 issued and outstanding at June 30, 2011 and December 31, 2010, respectively	54	53
Additional paid-in capital	605,061	596,667
Accumulated deficit	(203,861)	(239,542)
Accumulated other comprehensive income	310	420
Total stockholders' equity	401,564	357,598
Total liabilities and stockholders' equity	$ 538,675	$ 474,124