Summary of Significant Accounting Policies (Schedule of Weighted Average Number of Shares) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of Significant Accounting Policies
Basic weighted-average Common Shares outstanding	27,791,799	28,402,227	28,082,114
Effect of dilutive shares	478,296	677,599	689,531
Diluted weighted-average Common Shares outstanding	28,270,095	29,079,826	28,771,645