Earnings Per Share (Narrative) (Details) - shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Weighted average unvested shares outstanding	200,000	300,000	200,000	300,000
Anti-dilutive stock options	682	682	682	682
5.417% Series 1 Cumulative Convertible Preferred
Cumulative convertible preferred shares, dividend rate	5.417%	5.417%	5.417%	5.417%	5.417%