Equity (Common Stock Changes In Number of Shares Issued, Held In Treasury and Outstanding) (Details) - shares		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Shares, Issued		79,137,758			79,137,758
Treasury Stock, Shares, Acquired				(1,800,000)
Common Stock Issuable [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		79,137,758	79,137,758	79,137,758	79,137,758	79,137,758
Treasury Stock, Shares, Acquired		0	0
Stock Based Compensation Shares	[1]	0	0
Common Stock Held In Treasury [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		16,528,557	16,186,890	16,186,890	16,323,390	14,685,663
Treasury Stock, Shares, Acquired		(546,614)	(1,750,295)
Stock Based Compensation Shares	[1]	(341,447)	(249,068)
Common Stock Outstanding [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		62,609,201	62,950,868	62,950,868	62,814,368	64,452,095
Treasury Stock, Shares, Acquired		(546,614)	(1,750,295)
Stock Based Compensation Shares	[1]	(341,447)	(249,068)

[1] Represents net shares issued from treasury pursuant to the Company’s equity-based compensation programs.