Reclassification - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]
General and administrative expenses	$ 9,686	$ 8,864	$ 19,092	$ 17,400	$ 35,222	$ 30,136	$ 28,465
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Advertising Expense		$ 1,540		$ 2,960
General and administrative expenses					$ (5,570)	$ (4,803)	$ (3,848)