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, 2014		31,284,000
Beginning Balance at Jun. 30, 2014	$ 327,147	$ 312	$ 241,725	$ 84,099	$ 1,011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		1,275,000
Issuance of common stock under employee stock incentive plans	3,710	$ 13	3,697
Issuance of common stock under employee stock purchase plan (in shares)		79,000
Issuance of common stock under employee stock purchase plan	838	$ 1	837
Stock Repurchased and Retired During Period, Shares		(67,000)
Stock Repurchased and Retired During Period, Value	(944)		(944)
Stock-based compensation	8,728		8,728
Tax shortfall from employee stock plan awards	525		525
Net income	10,369			10,369
Foreign currency translation adjustments	(235)				(235)
Pension benefit plan, net of tax	0
Ending Balance (in shares) at Jun. 30, 2015		32,571,000
Ending Balance at Jun. 30, 2015	350,138	$ 326	254,568	94,468	776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		1,267,000
Issuance of common stock under employee stock incentive plans	6,879	$ 12	6,867
Issuance of common stock under employee stock purchase plan (in shares)		88,000
Issuance of common stock under employee stock purchase plan	1,218	$ 1	1,217
Stock Repurchased and Retired During Period, Shares		(426,000)
Stock Repurchased and Retired During Period, Value	(7,955)	$ (4)	(7,951)
Stock Issued During Period, Shares, New Issues		5,175,000
Stock Issued During Period, Value, New Issues	92,778	$ 52	92,726
Stock-based compensation	9,666		9,666
Net income	19,742			19,742
Share-based business combination consideration	407		407
Foreign currency translation adjustments	171				171
Pension benefit plan, net of tax	$ 0
Ending Balance (in shares) at Jun. 30, 2016	38,675,340	38,675,000
Ending 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
Foreign currency translation adjustments	(93)				(93)
Pension benefit plan, net of tax	$ 220				220
Ending Balance (in shares) at Jun. 30, 2017	46,303,075	46,303,000
Ending Balance at Jun. 30, 2017	$ 725,417	$ 463	$ 584,795	$ 139,085	$ 1,074