Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Goodwill [Line Items]
Goodwill				$ 175,500,000	$ 37,500,000
Reduction in goodwill				500,000	2,300,000
Goodwill impairment				$ 0	0	$ 0
Change in estimates of projected future variables that has no impact on reported value of goodwill, percentage				10.00%
Reduction in accumulated amortization				$ 600,000	1,100,000
Reduction in intangible assets				600,000	1,100,000
NACC
Goodwill [Line Items]
Goodwill				135,700,000
M&O
Goodwill [Line Items]
Goodwill				17,200,000
MAL
Goodwill [Line Items]
Goodwill				22,600,000
QED
Goodwill [Line Items]
Goodwill					11,100,000
Increase in fair value of contingent consideration liability				(200,000)
4sight Financial
Goodwill [Line Items]
Goodwill					$ 23,300,000
Reduction in goodwill				1,800,000
Increase in fair value of contingent consideration liability				1,200,000
WTRIS
Goodwill [Line Items]
Reduction in goodwill				900,000
Increase in fair value of contingent consideration liability	$ (400,000)	$ (3,100,000)	$ (800,000)
FSCI
Goodwill [Line Items]
Reduction in goodwill				$ 1,400,000