Earnings per Share (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restricted Shares [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental common shares attributable to share-based payment arrangements	286,189	279,269
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental common shares attributable to share-based payment arrangements	89,637	123,613