Preferred Stock (Series B Preferred Stock) (Narrative) (Details) - Series B Preferred Stock [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Apr. 15, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Redeemable preferred stock, shares outstanding			332,500	332,500
Preferred stock, annual dividend rate	10.00%
Preferred stock, liquidation preference per share	$ 25.00
Preferred stock, fixed annual amount of dividend per share	2.50
Preferred stock, redemption price	$ 25.00		$ 25.00
Preferred stock, deemed dividend		$ 2,781
Preferred stock dividends, adjustment to net earnings attributable to common shareholders		$ 911