Accrued Expenses and Other Liabilities - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued settlement liability		$ 3,500,000	$ 3,500,000
Settlement liability agreement date	April 16, 2015