Earnings Per Share (Narrative) (Details) - shares	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Weighted average unvested shares outstanding	200,000	200,000
Anti-dilutive stock options	682	682
5.417% Series 1 Cumulative Convertible Preferred
Cumulative convertible preferred shares, dividend rate	5.417%	5.417%	5.417%

This element represents nonvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid). Basic and dilutive earnings per share are generally disclosed for such shares using the two-class method.

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