Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Potentially dilutive securities included in calculation of diluted EPS (in shares)	199,376		204,080
Options to purchase common stock excluded from potentially dilutive securities (in shares)	425,100	1,712,527	431,190	1,812,142