Schedule I - Condensed Unconsolidated Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net loss including noncontrolling interest	$ (3,032)	$ (7,763)	$ (3,104)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	27,300	27,400	27,500
Share-based compensation expense	4,313	4,490	3,375
Changes in working capital, net of impact of acquisition:
Net cash provided by operating activities	40,182	27,669	37,960
Cash flows from investing activities
Purchase of property and equipment	(21,901)	(21,492)	(9,395)
Net cash used in investing activities	(21,721)	(21,345)	(9,191)
Cash flows from financing activities
Withholding tax on restricted stock units	(1,036)	(539)	(316)
Proceeds from exercise of stock options and ESPP	7,371	3,007	2,675
Payment for repurchase of common shares	(42,081)	(5,816)	(918)
Principal payments on capital leases	(940)	(1,061)	(1,267)
Net cash used in financing activities	(36,686)	(17,980)	(3,397)
Net increase (decrease) in cash and cash equivalents	(18,311)	(11,703)	25,382
Cash and cash equivalents at beginning of year	106,085	117,788	92,406
Cash and cash equivalents at end of year	87,774	106,085	117,788
Parent Company [Member]
Cash flows from operating activities
Net loss including noncontrolling interest	(3,032)	(7,763)	(3,104)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	545	587	366
Share-based compensation expense	190	242	187
Equity in net loss of subsidiaries	2,946	7,623	3,002
Changes in working capital, net of impact of acquisition:
Accounts receivable - intercompany	25,620	15,664	(2,333)
Other current assets	23	26	(124)
Accounts payable and accrued liabilities	174	(101)	(191)
Net cash provided by operating activities	26,466	16,278	(2,197)
Cash flows from investing activities
Purchase of property and equipment	(67)	(625)	(919)
Net cash used in investing activities	(67)	(625)	(919)
Cash flows from financing activities
Withholding tax on restricted stock units	(1,036)	(539)	(316)
Proceeds from exercise of stock options and ESPP	7,371	3,007	2,675
Payment for repurchase of common shares	(42,080)	(5,816)	(918)
Principal payments on capital leases	0	(95)	(281)
Net cash used in financing activities	(35,745)	(3,443)	1,160
Net increase (decrease) in cash and cash equivalents	(9,346)	12,210	(1,956)
Cash and cash equivalents at beginning of year	17,397	5,187	7,143
Cash and cash equivalents at end of year	$ 8,051	$ 17,397	$ 5,187