Basic and Diluted Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding	39,151	33,120	39,004	33,047
Effect of dilutive equity instruments	834	711	916	772
Diluted weighted-average shares outstanding	39,985	33,831	39,920	33,819
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	9	2	6	25