Basis of Presentation of Interim Financial Information - Initial Public Offering (Details) - Common $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended
	May. 31, 2015 USD ($) $ / shares shares
IPO
Initial Public Offering
Shares issued in offering	10,235
Share price (in dollars per share) | $ / shares	$ 25.00
Proceeds from the issuance of common stock in initial public offering, net of fees | $	$ 234.4
IPO, excluding Underwriters' Option
Initial Public Offering
Shares issued in offering	8,900
Underwriters' Option
Initial Public Offering
Shares issued in offering	1,335