Balance Sheet Information - Intangible Assets and Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Intangible Assets
Intangible assets	$ 12,940		$ 12,940		$ 12,940
Accumulated amortization	(4,751)		(4,751)		(4,033)
Intangible assets, net	8,189		8,189		8,907
Amortization expense for acquired intangible assets	359	$ 381	718	$ 762
Future amortization expense for acquired intangible assets
Remainder of fiscal 2018	709		709
2019	1,398		1,398
2020	1,398		1,398
2021	1,398		1,398
2022	1,398		1,398
Thereafter	1,888		1,888
Intangible assets, net	8,189		8,189		8,907
Components of accrued expenses
Accrued payroll and personnel costs	22,405		22,405		25,131
Other	6,723		6,723		5,170
Total accrued expenses	29,128		29,128		30,301
Client relationships
Intangible Assets
Intangible assets	12,580		$ 12,580		12,580
Useful life			9 years
Non-solicitation agreements
Intangible Assets
Intangible assets	$ 360		$ 360		$ 360
Minimum | Non-solicitation agreements
Intangible Assets
Useful life			2 years
Maximum | Non-solicitation agreements
Intangible Assets
Useful life			3 years