Earnings Per Common Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2017	Jul. 11, 2017
Earnings Per Share [Abstract]
Number of common share issued pursuant to partial exercise of option granted to underwrite		516,700
Public offering shares issued (in shares)	4,583,334
Price of stock issued during period (in dollars per share)	$ 12.00
Additional proceeds from exercise of option related to common stock issuance		$ 6.2
Gross proceeds from common stock issuance, including exercise of option		61.2
Net proceeds from common stock issuance, including exercise of option		$ 57.2