Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Components of Calculation of Earnings Per Share

The components of the calculation of earnings per share were as follows:

	2019		2018		2017
	(Dollars and shares in thousands)
Net income	$	193,814	$	223,994	$	269,659
Weighted average number of shares used in:
Basic earnings per share	110,939		110,603		110,353
Dilutive common stock equivalents:
Restricted stock units	569		1,029		1,010
Diluted earnings per share	111,508		111,632		111,363