Earnings Per Share - Reconciliation of the average shares outstanding used to compute basic and diluted earnings per share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding (in shares)	35,530,356	35,109,426	35,449,298	35,065,173
Effect of dilutive securities (in shares)	533,752	545,246	0	0
Diluted weighted average common shares outstanding (in shares)	36,064,108	35,654,672	35,449,298	35,065,173