Fair Value of Financial Instruments - Summary of Fair Value Maturities for Financial Asset (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Fair Value Disclosures [Abstract]
Maturities, Total	$ 41,504
Maturities, Less than 1 year	41,504
Maturities, 1-5 years	0
Maturities, 5-10 years	0
Maturities, More than 10 years	$ 0