Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ (11,606)	$ 7,571
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	5,729	1,689
Amortization of net premiums and discounts on available for sale securities	131	98
Amortization of long term debt financing costs	283	0
Amortization of debt discount	2,445	0
Unrealized foreign currency transaction (gain), net	(72)	(410)
Non-cash stock compensation expense	4,611	3,115
Loss (gain) on disposal of fixed assets	19	(40)
Deferred tax provision	(5,430)	0
Excess tax benefit from share-based compensation arrangements	(3,648)	(372)
Adjustment to contingent purchase price	(364)	564
Changes in operating assets and liabilities:
Accrued interest receivable	198	201
Accounts receivable	(4,872)	7,059
Inventory	(7,994)	(4,768)
Prepaid expenses and other current assets	(8,991)	(587)
Accounts payable	(15,148)	10,657
Accrued expenses	(2,217)	(39,879)
Deferred revenue	(1,124)	12
Other liabilities	85	43
Net cash used in operating activities	(47,965)	(15,047)
Cash flows from investing activities:
Purchases of available for sale securities	0	(37,222)
Proceeds from maturities and sales of available for sale securities	27,056	22,036
Purchases of fixed assets	(852)	0
Acquisitions	(301,699)	0
Acquisition of intangible assets		(36,678)
Other investments	(875)	0
Decrease in restricted cash	5	2,036
Net cash used in investing activities	(276,365)	(49,828)
Cash flows from financing activities:
Proceeds from issuances of common stock, net	29,735	3,880
Excess tax benefit from stock-based compensation arrangements	3,648	372
Net cash provided by financing activities	33,383	4,252
Effect of exchange rate changes on cash	(108)	768
(Decrease) in cash and cash equivalents	(291,055)	(59,855)
Cash and cash equivalents at beginning of period	519,446	315,382
Cash and cash equivalents at end of period	228,391	255,527
Supplemental disclosure of cash flow information:
Taxes paid	$ 1,400	$ 14