Consolidated Statements of Shareholders’ Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Dividends on common stock per share	$ 0.20	$ 0.20	$ 0.20
Common Stock
Offering expenses on issuance of stock			$ 134
Preferred Stock
Offering expenses on issuance of stock		$ 44