Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Employee Stock Purchase Plans) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Cash proceeds (in dollars)	$ 1,476	$ 1,079
Common shares issued (in shares)	53,399	35,732
Weighted average price per share purchased under employee stock purchase plans	$ 27.82	$ 34.48
Weighted average per share grant date fair value (in dollars per share)	$ 7.95	$ 8.76
Employee Stock Purchase Plans [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Cash proceeds (in dollars)	$ 1,500	$ 1,200