Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (41,533)	$ (10,179)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	14,929	17,026
Asset impairment charges	3,613	15,100
Amortization of long term debt financing costs	1,163	646
Amortization of debt discount	10,273	5,216
Unrealized foreign currency transaction gain, net	(146)	(528)
Non-cash share-based compensation expense	16,283	16,323
Undistributed loss on equity method investments	144	0
Loss on disposal of fixed assets	530	12
Deferred tax benefit	(18,312)	(532)
Excess tax expense (benefit) from share-based compensation arrangements	53	(1,667)
Gain on sale of investment	(19,773)	0
Gain on remeasurement of equity investment	(22,741)	0
Loss from inventory obsolescence	8,437	0
Adjustment to contingent purchase price	13,676	19,617
Changes in operating assets and liabilities:
Accounts receivable	102,953	(18,415)
Inventory	(54,644)	1,086
Prepaid expenses and other current assets	(1,276)	(411)
Accounts payable	(2,165)	(19,448)
Accrued expenses	(36,286)	28,310
Deferred revenue	(2,399)	(2,696)
Contingent purchase price	(48,867)	0
Other liabilities	(5,918)	(4,917)
Net cash (used in) provided by operating activities	(82,006)	44,543
Cash flows from investing activities:
Proceeds from sale of fixed assets	250	0
Proceeds from sale of investment	19,773	0
Purchases of fixed assets	(1,488)	(5,431)
Cash used for acquisitions, net	(28,397)	(58,871)
Payments for intangible assets	(97,617)	0
Other investments	0	(625)
Decrease in restricted cash	13	75
Net cash used in investing activities	(107,466)	(64,852)
Cash flows from financing activities:
Proceeds from issuances of common stock	20,785	9,506
Milestone payments	(126,783)	0
Proceeds from issuance of convertible senior notes	400,000	0
Debt issuance costs	(12,769)	0
Excess tax (expense) benefit from share-based compensation arrangements	(53)	1,667
Net cash provided by financing activities	281,180	11,173
Effect of exchange rate changes on cash	294	679
Increase (decrease) in cash and cash equivalents	92,002	(8,457)
Cash and cash equivalents at beginning of period	370,741	376,727
Cash and cash equivalents at end of period	462,743	368,270
Supplemental disclosure of cash flow information:
Interest paid	1,891	1,890
Taxes paid	$ 61	$ 1,200