Shareholders’ Equity (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Apr. 06, 2018	Mar. 29, 2018	Mar. 31, 2018	Dec. 31, 2017
Preferred shares issued		1,600,000	1,600,000	0
Preferred shares dividend rate		8.50%	8.50%
Preferred shares, par value		$ 0.0001	$ 0.0001
Preferred shares, liquidation preference		25.00
Preferred shares, redemption price		$ 25.00
Net proceeds from issuance of preferred shares		$ 38.3
Issuance of common stock			100,000
Proceeds from issuance of stock, gross			$ 2.9
Payments of sales commissions			0.1
Payments of other offering related expenses			0.1
Proceeds from issuance of stock			$ 2.7
Remaining number of shares for issuance in offering program			1,000,000
LIBOR [Member]
Preferred shares, variable dividend rate		5.82%
Subsequent Event [Member]
Preferred shares issued	170,900
Net proceeds from issuance of preferred shares	$ 4.1