Stock Incentives (Narrative Incentive Compensation Programs) (Details) - Incentive Compensation Plan [Member] - shares	Oct. 25, 2017	Aug. 22, 2017	Oct. 15, 2014	Oct. 21, 2009	Oct. 20, 2004
Common stock reserved for future issuance	4,700,000		3,760,000	2,481,494
Common Stock, Capital Shares Reserved for Future Issuance remaining		494
2-For-1 Stock Split [Member]
Common stock reserved for future issuance					8,000,000
Stock split					2