Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2019
Equity [Abstract]
Stock Options Excluded From Diluted Common Shares Outstanding Calculation		500,000		500,000	200,000
Proceeds from Issuance of Common Stock				$ 0	$ 607,650
Shares, Issued		1,082,834		1,082,834
Common stock dividend (in dollars per share)		$ 0.93	$ 0.91	$ 2.79	$ 2.73
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax						$ 6,806
Subsequent Event [Member]
Equity [Abstract]
Common stock dividend (in dollars per share)	$ 0.95