Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share

Schedule of computation of basic and diluted earnings per share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Dollars and shares in thousands, except for per share amounts)	2018		2017		2018		2017
Basic earnings per common share:
Net income	$	40,459	$	31,823	$	82,785	$	50,087
Weighted-average basic common shares		36,677		29,095		36,657		28,985
Basic earnings per common share	$	1.10	$	1.09	$	2.25	$	1.73
Diluted earnings per share:
Net income	$	40,459	$	31,823	$	82,785	$	50,087
Weighted-average basic common shares		36,677		29,095		36,657		28,985
Effect of dilutive securities		252		270		253		267
Weighted-average dilutive shares		36,929		29,365		36,910		29,252
Diluted earnings per common share	$	1.09	$	1.08	$	2.24	$	1.71

Schedule of anti-dilutive securities excluded from computation of diluted earnings per common share

	Three Months Ended June 30,										Six Months Ended June 30,
(Dollars in thousands)	2018					2017					2018					2017
Number of shares					61,272					34,712					61,272					34,712
Range of exercise prices	$	91.05	to	$	91.35	$	69.48	to	$	91.35	$	91.05	to	$	91.35	$	69.48	to	$	91.35