Stock-Based Compensation (Schedule of Fair Value of the Restricted Stock Awards Granted During the Periods) (Details) - Restricted Stock [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019		Jun. 30, 2019
Time Vested [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	74,284		999,957
Estimated fair value (in millions)	$ 900	[1]	$ 15,500
Time Vested [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	1,500		927,173
Estimated fair value (in millions)	$ 0	[1]	$ 14,600
Percentage of shares granted expected to be distributed	95.00%		95.00%
Time Vested [Member] | Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	72,784		72,784
Estimated fair value (in millions)	$ 900	[1]	$ 900
Percentage of shares granted expected to be distributed	100.00%		100.00%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0		424,070
Estimated fair value (in millions)	$ 0	[1]	$ 7,100
Performance Shares [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0		424,070
Estimated fair value (in millions)	$ 0	[1]	$ 7,100
Percentage of shares granted expected to be distributed			54.00%
Performance Shares [Member] | Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0		0
Estimated fair value (in millions)	$ 0	[1]	$ 0

[1] The performance shares represent 100% of the grant date fair value. (We recognize the grant date fair value minus estimated forfeitures.)