Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Basic and diluted earnings per share

Basic and diluted earnings per share has been computed based on the following:

	Years ended
(Dollars in thousands, except per share data)	December 31, 2020		December 31, 2019	December 31, 2018
Net income available to common stockholders, basic and diluted	$	266,400	210,544	181,878
Average outstanding shares - basic	94,883,864		88,255,290	83,603,515
Add: dilutive restricted stock units and stock options	48,489		130,485	73,670
Average outstanding shares - diluted	94,932,353		88,385,775	83,677,185
Basic earnings per share	$	2.81	2.39	2.18
Diluted earnings per share	$	2.81	2.38	2.17
Restricted stock units and stock options excluded from the   diluted average outstanding share calculation 1	88,240		—	1,357

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1 Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock units or the exercise price of a stock option exceeds the market price of the Company’s stock.