Description of Business - Additional Information (Details) shares in Thousands, $ in Millions	1 Months Ended
	Jun. 30, 2017 USD ($) shares
Subsidiary, Sale of Stock [Line Items]
Subsidiary or Equity Method Investee, Cumulative Proceeds Received on All Transactions | $	$ 57.8
Sale of Stock, Consideration Received on Transaction | $	$ 56.5
Sale of Stock, Number of Shares Issued in Transaction (in shares) | shares	3,450
Over-Allotment Option [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of Stock, Number of Shares Issued in Transaction (in shares) | shares	450