Related Party Transactions - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended
	Jun. 25, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
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	$ 300,000	$ 7,000,000	$ 800,000
Purchases included in accrued expenses		$ 10,000
Agreement term					7 years
Aggregate termination fee paid	$ 6,500,000
Due from parent			0		$ 0
VWR [Member]
Related Party Transaction [Line Items]
Expected payment to related party				$ 100,000		200,000
VWR [Member] | Accounts Payable and Accrued Liabilities [Member]
Related Party Transaction [Line Items]
Expected payment to related party		21,000			9,000
Marsh [Member]
Related Party Transaction [Line Items]
Expected payment to related party					200,000	$ 200,000
Prepaid expense due to related party in other current assets		$ 43,000	$ 43,000		$ 43,000