Subsequent Events - Summary of Preliminary Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Jul. 17, 2015	Jun. 30, 2015	Mar. 31, 2015
Business Acquisition [Line Items]
Goodwill		$ 98,894	$ 98,679
BaySaver [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Cash	$ 12
Other current assets	2,262
Property, plant and equipment	164
Goodwill	2,495
Intangible assets	10,800
Other assets	152
Current liabilities	(1,385)
Total purchase price	$ 14,500