Summary of Significant Accounting Policies -Basic and Diluted Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding (in shares)	43,773	33,251	40,573	33,052
Effect of dilutive equity instruments (in shares)	1,041	740	957	778
Diluted weighted-average shares outstanding (in shares)	44,814	33,991	41,530	33,830
Antidilutive securities excluded from computation of earnings per share (in shares)	9	26	13	4