Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance (in shares) at Jun. 30, 2016		38,675,000
Beginning Balance at Jun. 30, 2016	$ 473,044	$ 387	$ 357,500	$ 114,210	$ 947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		976,000
Issuance of common stock under employee stock incentive plans	2,756	$ 9	2,747
Issuance of common stock under employee stock purchase plan (in shares)		96,000
Issuance of common stock under employee stock purchase plan	2,214	$ 1	2,213
Stock Repurchased and Retired During Period, Shares		(344,000)
Stock Repurchased and Retired During Period, Value	(8,766)	$ (3)	(8,763)
Stock Issued During Period, Shares, New Issues		6,900,000
Stock Issued During Period, Value, New Issues	215,725	$ 69	215,656
Stock-based compensation	15,442		15,442
Net income	24,875			24,875
Share-based business combination consideration			0
Foreign currency translation adjustments	(93)				(93)
Pension benefit plan, net of tax	220				220
Ending Balance (in shares) at Jun. 30, 2017		46,303,000
Ending Balance at Jun. 30, 2017	725,417	$ 463	584,795	139,085	1,074
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		868,000
Issuance of common stock under employee stock incentive plans	663	$ 8	655
Issuance of common stock under employee stock purchase plan (in shares)		82,000
Issuance of common stock under employee stock purchase plan	2,782	$ 1	2,781
Stock Repurchased and Retired During Period, Shares		(329,000)
Stock Repurchased and Retired During Period, Value	(15,508)	$ (3)	(15,505)
Stock-based compensation	17,437		17,437
Net income	40,883			40,883
Foreign currency translation adjustments	(137)				(137)
Pension benefit plan, net of tax	$ 354				354
Ending Balance (in shares) at Jun. 30, 2018	46,303,075	46,924,000
Ending Balance at Jun. 30, 2018	$ 771,891	$ 469	590,163	179,968	1,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		478,000
Issuance of common stock under employee stock incentive plans	0	$ 5	(5)
Issuance of common stock under employee stock purchase plan (in shares)		102,000
Issuance of common stock under employee stock purchase plan	3,661	$ 1	3,660
Stock Repurchased and Retired During Period, Shares		(156,000)
Stock Repurchased and Retired During Period, Value	(7,968)	$ (2)	(7,966)
Stock Issued During Period, Shares, New Issues		6,900,000
Stock Issued During Period, Value, New Issues	453,573	$ 69	453,504
Stock-based compensation	19,389		19,389
Net income	46,775			46,775
Foreign currency translation adjustments	(232)				(232)
Pension benefit plan, net of tax	$ (2,350)				(2,350)
Ending Balance (in shares) at Jun. 30, 2019	46,303,075	54,248,000
Ending Balance at Jun. 30, 2019	$ 1,284,739	$ 542	$ 1,058,745	$ 226,743	$ (1,291)