Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 108,295	$ 46,063
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,514	5,085
Amortization of net premiums and discounts on available for sale securities	2,021	2,432
Unrealized foreign currency transaction losses (gain), net	596	(596)
Non-cash stock compensation expense	8,376	6,855
Loss on disposal of fixed assets	310	6
Deferred tax provision	(68,385)	710
Adjustment to contingent purchase price	2,817	2,265
Changes in operating assets and liabilities:
Accrued interest receivable	836	0
Accounts receivable	(26,011)	(4,214)
Inventory	(4,973)	(3,656)
Prepaid expenses and other current assets	(2,602)	2,450
Accounts payable	1,805	4,275
Accrued expenses	32,264	(12,481)
Deferred revenue	618	(691)
Other liabilities	128	122
Net cash provided by operating activities	60,609	48,625
Cash flows from investing activities:
Purchases of available for sale securities	(33,835)	(100,830)
Proceeds from maturities and sales of available for sale securities	102,356	80,140
Purchases of fixed assets	(879)	(151)
Adjustment to goodwill	0	263
Decrease in restricted cash	1,143	1,285
Net cash provided by (used in) investing activities	68,785	(19,293)
Cash flows from financing activities:
Proceeds from issuances of common stock, net	3,972	2,764
Net cash provided by financing activities	3,972	2,764
Effect of exchange rate changes on cash	(1,695)	848
Increase in cash and cash equivalents	131,671	32,944
Cash and cash equivalents at beginning of period	126,364	72,225
Cash and cash equivalents at end of period	258,035	105,169
Supplemental disclosure of cash flow information:
Taxes paid	$ 6,783	$ 229