Shareholders' Equity (Preferred and Common Stock) (Details) - $ / shares	May 19, 2017	Jun. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred stock, par value		$ 1	$ 1
Preferred stock, shares authorized		500,000	500,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Common stock, par value		$ 1	$ 1
Common stock, shares authorized		3,000,000	3,000,000
Common stock, shares issued		2,522,312	2,517,339
Common stock, shares outstanding		2,522,312	2,517,339
Common Stock
Class of Stock [Line Items]
Stock issued (in shares)	4,973
Class A Common Stock
Class of Stock [Line Items]
Common stock, par value		$ 1	$ 1
Common stock, shares authorized		2,000,000	2,000,000
Common stock, shares issued		0	0
Common stock, shares outstanding		0	0