Shareholder's Equity (Schedule of Stock Option Activity (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period, Number of Shares	270,464
Options exercised, Number of Shares	(89,481)
Outstanding at end of period, Number of Shares	180,983	270,464
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period, Weighted Average Exercise Price	$ 23.16
Options exercised, Weighted Average Exercise Price	$ 24.03
Outstanding at end of period, Weighted Average Exercise Price	$ 22.73	$ 23.16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding at beginning of period, Weighted Average Remaining Contractual Life (in years)	1 year 292 days	2 years 6 months 0 days
Outstanding at end of period, Weighted Average Remaining Contractual Life (in years)	1 year 292 days	2 years 6 months 0 days