Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Components of Calculation of Earnings Per Share

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

	2018		2017		2016
	(Dollars and shares in thousands)
Net income	$	223,994	$	269,659	$	153,351
Weighted average number of shares used in:
Basic earnings per share	110,603		110,353		119,732
Dilutive common stock equivalents:
Restricted stock units	1,029		1,010		766
Diluted earnings per share	111,632		111,363		120,498