Related Party Transactions - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Jun. 25, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Avista [Member] | INC [Member]
Related Party Transaction [Line Items]
Costs incurred associated with agreement		$ 300,000		$ 500,000
Agreement term				3 years
Avista [Member] | INC [Member] | Accrued Expenses and Other Liabilities [Member]
Related Party Transaction [Line Items]
Purchases included in accrued expenses and other liabilities		100,000		$ 100,000
Avista [Member] | Advisory Services and Monitoring Agreement [Member]
Related Party Transaction [Line Items]
Annual fee		1,000,000		1,000,000
Costs incurred associated with agreement		0	$ 6,800,000	$ 0	$ 7,000,000
Agreement term				7 years
Aggregate termination fee paid	$ 6,500,000
Due from parent		0		$ 0		$ 0
VWR [Member]
Related Party Transaction [Line Items]
Purchases		100,000	$ 44,000.0	200,000	$ 100,000
VWR [Member] | Accounts Payable and Accrued Expenses [Member]
Related Party Transaction [Line Items]
Purchases included in accrued expenses and other liabilities		$ 6,000		$ 6,000		$ 10,000