Earnings Per Share - Reconciliation of the average shares outstanding used to compute basic and diluted earnings per share (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding (in shares)	35,111,594	34,441,777	34,009,048
Effect of dilutive securities - stock awards (in shares)	743,308	0	0
Diluted weighted average common shares outstanding (in shares)	35,854,902	34,441,777	34,009,048