Share Repurchase Programs (Detail) - USD ($)	3 Months Ended	6 Months Ended	65 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Aug. 31, 2014
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount				$ 50,000,000
Purchase of common stock, shares			1,416,587
Purchase of Treasury Stock	$ 1,625,000	$ 1,625,000	$ 22,300,000
Program
Equity Class Of Treasury Stock [Line Items]
Purchase of common stock, shares	50,000	50,000
Purchase of Treasury Stock	$ 1,600,000	$ 1,600,000