Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 68,644	$ 63,084	$ 44,985
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	66,569	19,050	18,073
Provision for doubtful accounts	2,308	0	54
Provision for warranty and returns	845	559	52
Stock compensation	19,352	15,242	12,827
Loss (gain) on disposal of property and equipment	3,778	59	(1,106)
Bond premium amortization	103	1,355	1,670
Debt issuance cost amortization	48	0	0
Impairment of assets held for sale	0	728	4,139
Bargain Purchase Gain	(70,890)	(1,456)	0
Change in fair value of contingent earn-out	8,000	0	0
Other	(220)	75	0
Changes in operating assets and liabilities
Accounts receivable	(54,533)	744	(20,515)
Inventories	181,699	(5,501)	(8,337)
Prepaid expenses and other assets	(31,807)	(3,028)	(1,832)
Increase (Decrease) in Due from Related Parties, Current	(95,309)	0	0
Accounts payable	46,648	(463)	3,118
Accrued liabilities	33,813	(1,221)	9,454
Income taxes, including excess tax benefits and deferred income taxes	(24,625)	714	1,613
Net cash provided by operating activities	154,423	89,941	64,195
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(74,479)	(23,361)	(12,984)
Proceeds from sale of assets	2	0	3,592
Proceeds from the disposal of assets held for sale	0	3,268	0
Intangible asset additions	(5,203)	(1,192)	(951)
Business acquisitions, net of cash acquired	(162,448)	(2,584)	(56,786)
Proceeds from sale of assets acquired in a business acquisition	0	0	28,970
Purchases of investment securities	(24,743)	(118,384)	(56,137)
Proceeds from sale of investment securities	0	158,534	83,054
Net cash (used in) provided by investing activities	(266,871)	16,281	(11,242)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of Long-term obligations	(75,000)	0	0
Proceeds from exercise of stock options	32,003	17,346	15,042
Proceeds from employee stock purchase plan	2,705	2,361	2,162
Purchase of treasury stock	(4,057)	(17,235)	(1,523)
Net cash (used in) provided by financing activities	(44,349)	2,472	15,681
Effect of exchange rate changes on cash	1,787	224	(8,282)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(155,010)	108,918	60,352
CASH AND CASH EQUIVALENTS, beginning of period	445,082	336,164	275,812
CASH AND CASH EQUIVALENTS, end of period	290,072	445,082	336,164
SUPPLEMENTAL DISCLSOURE OF CASH FLOW INFORMATION
Cash paid during the year for income taxes	5,109	21,101	22,998
Cash paid during the year for interest	2,047	118	39
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING ACTIVITIES
Accounts payable for property and equipment	5,376	1,566	182
Fair value of assets acquired	886,569	3,306	60,693
Cash paid for acquisitions, net of cash acquired	(162,448)	(2,584)	(56,786)
Proceeds from Issuance of Debt	(75,000)	0	0
Estimated working capital adjustment	4,253	0	0
Contingent consideration	(19,000)	0	0
Issuance of common stock for acquisitions	(413,139)	0	0
Bargain Purchase Gain	(70,890)	(1,456)	0
Goodwill, Acquired During Period	6,536	0	0
Liabilities Assumed/Adjustments to liabilities assumed	(156,881)		$ (3,907)
Adjustments to assumed liabilities		$ (734)
Hospira [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Bargain Purchase Gain	(70,890)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING ACTIVITIES
Proceeds from Issuance of Debt	(75,000)
Contingent consideration	(19,000)
Issuance of common stock for acquisitions	(413,139)
Bargain Purchase Gain	$ (70,890)