Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Employee Stock Purchase Plans) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Cash proceeds (in dollars)	$ 5,483	$ 3,414
Common shares issued (in shares)	193,655	87,014
Weighted average price per share purchased under employee stock purchase plans	$ 28.29	$ 39.23
Weighted average per share grant date fair value (in dollars per share)	$ 8.61	$ 9.97
Employee Stock Purchase Plans [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Cash proceeds (in dollars)	$ 5,500	$ 3,400