CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 9,180	$ 32,756
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,151	27,093
Deferred income tax benefit/provision	5,068	(6,843)
Share-based compensation	3,750	4,083
Amortization of debt issuance costs and expenses associated with debt refinancing	4,246	1,357
Accretion of bond issuance discount	2,529	0
Loss on disposal of property and equipment	374	367
Change in fair value of contingent consideration and others	(1,051)	194
Changes in assets and liabilities:
Accounts receivable	28,301	(13,705)
Inventories	(26,236)	(12,048)
Prepaid expenses and other current assets	4,683	(12,949)
Other non-current assets	3,000	(628)
Accounts payable, accrued expenses and other current liabilities	(40,235)	5,387
Contract liabilities	338	(188)
Other non-current liabilities	(2,284)	4,608
Net cash provided by operating activities	20,814	29,484
INVESTING ACTIVITIES:
Purchases of property and equipment	(16,519)	(16,086)
Acquired in-process research and development	(5,000)	0
Proceeds from note receivable	0	245
Proceeds from sale of property and equipment	34	35
Net cash used in investing activities	(21,485)	(15,806)
FINANCING ACTIVITIES:
Proceeds from borrowings of long-term indebtedness	113,200	67,200
Payments on debt	(344,200)	(57,400)
Purchase of option hedge on convertible notes	(104,248)	0
Proceeds from convertible notes issuance	575,000	0
Proceeds from sale of stock purchase warrants	44,562	0
Payment of debt issuance costs	(20,264)	0
Purchases of treasury stock	(100,000)	0
Proceeds from exercised stock options	2,303	1,750
Cash taxes paid in net equity settlement	(4,348)	(6,157)
Net cash provided by financing activities	162,005	5,393
Effect of exchange rate changes on cash and cash equivalents	(2,533)	(884)
Net increase in cash and cash equivalents	158,801	18,187
Cash and cash equivalents at beginning of period	198,911	138,838
Cash and cash equivalents at end of period	$ 357,712	$ 157,025