Share Repurchase (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Feb. 04, 2020	Nov. 08, 2018
Equity, Class of Treasury Stock [Line Items]
Total number of share repurchases	974,883	1,164,308	2,448,746	3,838,275
Total cost of share repurchases	$ 36,605	$ 36,870	$ 81,568	$ 136,889
Average price paid per share	$ 37.55	$ 31.67	$ 33.31	$ 35.66
Life-to-Date Current Shares Repurchase Program Total number of share repurchases	966,722		966,722
Life-to-Date Current Shares Repurchase Program Total cost of share repurchases	$ 36,337		$ 36,337
Life-to-Date Current Shares Repurchase Program Average price paid per share	$ 37.59		$ 37.59
Authorized On February Fourth Two-Thousand Twenty [Member]
Equity, Class of Treasury Stock [Line Items]
Authorized amount for repurchase					$ 300,000
Maximum
Equity, Class of Treasury Stock [Line Items]
Remaining authorized amount for repurchase	$ 263,700		$ 263,700
Maximum | Authorized On November Eighth Two-Thousand Twenty [Member]
Equity, Class of Treasury Stock [Line Items]
Authorized amount for repurchase						$ 300,000