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Summary of Significant Accounting Policies (Computation of Anti-Dilutive Common Share) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Equity Option      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0 0 0
Participating Securities      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0 1,621,000 0