Earnings Per Share (Narrative) (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Series A Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Percentage of common stock if-converted Series A preferred stock (percent)	16.80%
Series A preferred shares, number of shares issuable if converted (shares)	13,793,100
Stock Options and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities not included in the calculation of diluted income per share	400,000	800,000