Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Commitments And Contingencies Disclosure [Abstract]
Rent expense for office space	$ 900,000	$ 900,000	$ 1,700,000	$ 1,800,000
Leases expiration year			2021
Estimated fair value of indemnification agreements	0		$ 0		$ 0
Fair value of indemnity provisions	$ 0		$ 0		$ 0