Earnings Per Share (Narrative) (Details) - Series A Preferred Stock [Member]	12 Months Ended
	Dec. 31, 2017 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Percentage of common stock if-converted Series A preferred stock (percent)	16.70%
Series A preferred shares, number of shares issuable if converted (shares)	13,793,100