Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Basic and diluted earnings per share

	Three Months ended			Six Months ended
(Dollars in thousands, except per share data)	June 30, 2013		June 30, 2012	June 30, 2013		June 30, 2012
Net income available to common stockholders, basic and diluted	$	22,702	18,981	$	43,470	35,314
Average outstanding shares - basic	72,480,019		71,928,697	72,224,263		71,921,885
Add: dilutive stock options and awards	68,153		156	57,841		105
Average outstanding shares - diluted	72,548,172		71,928,853	72,282,104		71,921,990
Basic earnings per share	$	0.31	0.26	$	0.60	0.49
Diluted earnings per share	$	0.31	0.26	$	0.60	0.49