Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Potentially dilutive securities:
Potentially dilutive securities (in shares)	422,170	825,907	530,972	1,014,746
Options to purchase common stock excluded from potentially dilutive securities (in shares)	133,500	0	133,500	0