Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Summary of earnings per share

Earnings per share consisted of the following components for the periods indicated:

	Three Months Ended
	March 31
	2017			2016
	(Dollars in thousands, except per share data)
Net income	$	20,725		$	18,611
Weighted Average Shares
Basic shares	27,029,640			26,275,323
Effect of dilutive securities	81,283			43,409
Diluted shares	27,110,923			26,318,732
Net income per share
Basic EPS	$	0.77		$	0.71
Effect of dilutive securities	(0.01		)	—
Diluted EPS	$	0.76		$	0.71

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following table illustrates the options to purchase common stock or shares of performance-based restricted stock that were excluded from the calculation of diluted earnings per share because they were anti-dilutive for the periods indicated:

	Three Months Ended
	March 31
	2017	2016
Stock options	—	2,252
Performance-based restricted stock	127	—