Share Repurchase (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Feb. 04, 2020	Nov. 08, 2018
Equity, Class of Treasury Stock [Line Items]
Total number of share repurchases	1,473,863	1,755,160	1,473,863	2,673,967
Total cost of share repurchases	$ 44,963	$ 59,764	$ 44,963	$ 100,019
Average price paid per share	$ 30.51	$ 34.05	$ 30.51	$ 37.40
Life-to-Date Current Shares Repurchase Program Total number of share repurchases	7,857,294		7,857,294
Life-to-Date Current Shares Repurchase Program Total cost of share repurchases	$ 299,732		$ 299,732
Life-to-Date Current Shares Repurchase Program Average price paid per share	$ 38.15		$ 38.15
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	$ 300,300		$ 300,300
Maximum | Authorized On November Eighth Two-Thousand Twenty [Member]
Equity, Class of Treasury Stock [Line Items]
Authorized amount for repurchase						$ 300,000