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
Stock Issued During Period, Shares, New Issues	4,583,334
Price of stock issued during period	$ 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