Balance Sheet Account Detail - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Schedule Of Investments In Marketable Securities [Line Items]
Securities in continuous unrealized loss position, period		longer than one year.
Depreciation expense		$ 300	$ 400
Intangible asset amortization expense		12,100	13,700
Impairment of intangible assets		$ 8,183		$ 8,183
Other Intangible Assets [Member]
Schedule Of Investments In Marketable Securities [Line Items]
Intangible asset amortization expense			20,900
FUSILEV [Member]
Schedule Of Investments In Marketable Securities [Line Items]
Impairment of intangible assets	$ 7,200		$ 7,200