Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Schedule of Reconciliation of Numerator and Denominator of Income Per Common Share

The reconciliation of the numerator and denominator of the income per common share is as follows:

	Three months ended June 30,				Six months ended June 30,
(Dollar amounts in thousands, except per share information)	2015		2014		2015		2014
Net income	$	20,267	$	17,773	$	39,330	$	35,979
Less: non-forfeitable dividends on restricted stock		3		—		3		—
Net income available to common shareholders	$	20,264	$	17,773	$	39,327	$	35,979
Weighted average common shares outstanding		77,457,322		78,410,554		77,631,339		78,393,042
Weighted average potential dilutive common shares (1)		240,539		789,410		148,863		811,600
Weighted average common shares outstanding - assuming dilution		77,697,861		79,199,964		77,780,202		79,204,642
Net income per common share - basic	$	0.26	$	0.23	$	0.51	$	0.46
Net income per common share - diluted	$	0.26	$	0.22	$	0.51	$	0.45

⁽¹⁾  Potential common shares consist of common stock issuable under the assumed exercise of stock options and restricted stock awards using the treasury stock method.