Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jan. 01, 2019
Equity [Abstract]
Stock Options Excluded From Diluted Common Shares Outstanding Calculation		500,000		500,000	300,000
Proceeds from Issuance of Common Stock				$ 0	$ 607,650
Shares, Issued		1,061,599		1,061,599
Common stock dividend (in dollars per share)		$ 0.93	$ 0.91	$ 1.86	$ 1.82
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)	$ 0.93