Nature of Business and Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, $ in Millions |
|
|
|
1 Months Ended |
7 Months Ended |
12 Months Ended |
|
Mar. 21, 2017
shares
|
Mar. 15, 2017
shares
|
Feb. 24, 2017 |
Mar. 31, 2017
USD ($)
$ / shares
|
Jun. 30, 2015
USD ($)
|
Jun. 30, 2017
USD ($)
subsidiary
|
Jun. 30, 2016
USD ($)
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Number of wholly owned subsidiaries | subsidiary |
|
|
|
|
|
2
|
|
| Stock split conversion ratio |
|
|
2
|
|
|
|
|
| Proceeds from initial public offering, net of underwriter discounts and commissions |
|
|
|
$ 247.5
|
$ 0.0
|
$ 247.5
|
$ 0.0
|
| Costs related to initial public offering |
|
|
|
$ 7.2
|
|
7.2
|
|
| Percentage of fair value in excess of carrying amount |
|
|
|
138.30%
|
|
|
|
| Amount of excess tax benefit |
|
|
|
|
|
0.8
|
|
| Accounting Standards Update 2016-15 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Debt extinguishment costs |
|
|
|
|
$ 0.2
|
$ 21.5
|
$ 0.5
|
| IPO [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Number of shares issued in IPO | shares |
|
18,766,465
|
|
|
|
|
|
| Price per share (in usd per share) | $ / shares |
|
|
|
$ 14.00
|
|
|
|
| Over-Allotment Option [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Number of shares issued in IPO | shares |
2,099,799
|
|
|
|
|
|
|
| Minimum [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Term of discounting arrangements |
|
|
|
|
|
2 years
|
|
| Maximum [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Term of discounting arrangements |
|
|
|
|
|
5 years
|
|
| Equipment, Software and Furniture and Fixtures [Member] | Minimum [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Estimated useful lives |
|
|
|
|
|
3 years
|
|
| Equipment, Software and Furniture and Fixtures [Member] | Maximum [Member] |
|
|
|
|
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
|
|
|
|
| Estimated useful lives |
|
|
|
|
|
7 years
|
|