Commitments and Contingencies (Narrative) (Detail) - USD ($) $ in Thousands			9 Months Ended
		Sep. 21, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Nov. 22, 2016	Nov. 20, 2015	Feb. 12, 2014
Guarantor Obligations [Line Items]
Premiums, Percentage Assumed to Net		1.00%
Proceeds from Collection of Notes Receivable			$ 0	$ 8,142
Accounts Receivable, Net, Noncurrent	[1]		1,400
Total lease payments for the duration of the guarantee			36,700
Accrued lease liability			10,700		$ 10,700
February 2018 Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Unamortized Discount			0		$ 381	$ 4,300	$ 3,100	$ 29,700
kaleo Note Receivable [Member]
Guarantor Obligations [Line Items]
Proceeds from Collection of Notes Receivable		$ 141,700
Noden [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			91,900
Noden [Member] | Next twenty-four months [Member] [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			137,500
Noden [Member] | Bulk product [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			13,700
LENSAR [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			1,600
LENSAR [Member] | Next twenty-four months [Member] [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			$ 3,300

[1] unaudited