Earnings Per Share and Stockholders' Equity (Stockholders' Equity) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 21, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Preferred stock, shares issued	16,000	16,000	0
Preferred stock dividend rate, percentage	5.95%
Preferred stock, par value per share	$ 1.00	$ 1	$ 1
Preferred stock, liquidation preference, per share	$ 25,000
Net proceeds received from issuance of preferred stock	$ 388,900	$ 388,893	$ 0	$ 0