CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities of continuing operations:
Net income	$ 200,802,000	$ 152,530,000	$ 237,841,000
Adjustments to reconcile net income to net cash provided by operating activities:
(Income) loss from discontinued operations	(4,370,000)	2,733,000	(190,000)
Depreciation expense	60,494,000	56,497,000	54,415,000
Amortization expense of intangible assets	149,486,000	98,766,000	63,491,000
Amortization expense of deferred financing costs and debt discount	4,734,000	5,075,000	10,440,000
Loss on extinguishment of debt	0	5,593,000	19,261,000
Fair value step up of acquired inventory sold	0	10,442,000	0
Changes in contingent consideration	52,977,000	3,575,000	(6,445,000)
Impairment of long-lived assets	19,110,000	0	2,356,000
In-process research and development impairment charge	0	0	41,000,000
Stock-based compensation	22,438,000	19,407,000	16,871,000
Net gain on sales of businesses and assets	(1,388,000)	0	(4,367,000)
Deferred income taxes, net	(6,097,000)	(41,822,000)	(29,346,000)
Other	(18,803,000)	(18,469,000)	(13,311,000)
Changes in operating assets and liabilities, net of effects of acquisitions and disposals:
Accounts receivable	(23,412,000)	(11,039,000)	(11,029,000)
Inventories	(37,198,000)	(22,363,000)	6,408,000
Prepaid expenses and other current assets	(10,351,000)	547,000	(3,613,000)
Accounts payable, accrued expenses and other liabilities	62,404,000	39,001,000	15,422,000
Income taxes receivable and payable, net	(35,740,000)	125,828,000	11,386,000
Net cash provided by operating activities from continuing operations	435,086,000	426,301,000	410,590,000
Cash flows from investing activities of continuing operations:
Expenditures for property, plant and equipment	(80,795,000)	(70,903,000)	(53,135,000)
Payments for businesses and intangibles acquired, net of cash acquired	(121,025,000)	(1,768,284,000)	(14,040,000)
Proceeds from sales of businesses and assets	3,878,000	6,332,000	10,201,000
Net interest proceeds on swaps designated as net investment hedges	1,548,000	0	0
Net cash used in investing activities from continuing operations	(196,394,000)	(1,832,855,000)	(56,974,000)
Cash flows from financing activities of continuing operations:
Proceeds from new borrowings	35,000,000	2,463,500,000	671,700,000
Reduction in borrowings	(128,500,000)	(1,239,576,000)	(714,565,000)
Debt extinguishment, issuance and amendment fees	(188,000)	(26,664,000)	(8,958,000)
Proceeds from share based compensation plans and the related tax impacts	22,655,000	5,571,000	9,068,000
Payments to noncontrolling interest shareholders	0		(464,000)
Payments for acquisition of noncontrolling interest	0	0	(9,231,000)
Payments for contingent consideration	(73,235,000)	(335,000)	(7,282,000)
Dividends	(62,165,000)	(61,237,000)	(58,960,000)
Net cash (used in) provided by financing activities from continuing operations	(206,433,000)	1,141,259,000	(118,692,000)
Cash flows from discontinued operations:
Net cash provided by (used in) operating activities	2,292,000	(6,416,000)	(2,110,000)
Net cash provided by (used in) discontinued operations	2,292,000	(6,416,000)	(2,110,000)
Effect of exchange rate changes on cash and cash equivalents	(10,948,000)	61,480,000	(27,391,000)
Net increase (decrease) in cash and cash equivalents	23,603,000	(210,231,000)	205,423,000
Cash and cash equivalents at the beginning of the year	333,558,000	543,789,000	338,366,000
Cash and cash equivalents at the end of the year	357,161,000	333,558,000	543,789,000
Supplemental cash flow information:
Cash interest paid	101,790,000	74,256,000	44,203,000
Income taxes paid, net of refunds	65,605,000	49,144,000	23,955,000
Non cash investing and financing activities of continuing operations:
Property, plant and equipment additions due to build-to-suit lease transactions	29,448,000	0	0
Purchases of businesses and related costs	54,696,000	261,733,000	0
Settlement and exchange of convertible notes with common or treasury stock	0	53,207,000	35,286,000
Acquisition of treasury stock from settlement and exchange of convertible note hedge and warrants	$ 56,075,000	$ 141,405,000	$ 86,046,000