Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share, Basic, Other Disclosures [Abstract]

Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted EPS

The following table reconciles the number of shares used in calculating the basic and diluted earnings per share for the quarters and six months ended June 30:

	Quarter Ended June 30,				Six Months Ended June 30,
(Dollars in thousands, except per-share amounts)	2013		2012		2013		2012
Net income	$	19,182	$	5,080	$	34,669	$	10,131
Basic weighted-average shares outstanding	40,508,872		40,332,340		40,473,705		40,289,889
Incremental shares due to:
Performance shares	107,391		31,725		109,258		32,739
Restricted stock units	70,089		72,048		65,319		70,505
Stock options	7,389		22,819		7,134		20,900
Diluted weighted-average shares outstanding	40,693,741		40,458,932		40,655,416		40,414,033
Basic net income per share	$	0.47	$	0.13	$	0.86	$	0.25
Diluted net income per share	$	0.47	$	0.13	$	0.85	$	0.25
Anti-dilutive shares excluded from the calculation:
Performance shares	10,311		—		18,474		84,143
Restricted stock units	—		—		432		17,430
Total anti-dilutive shares excluded from the calculation	10,311		—		18,906		101,573