Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2014

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 years ended December 31:

(Dollars in thousands, except per-share amounts)	2014		2013		2012
Net income	$	89,910	$	70,581	$	42,594
Basic weighted-average shares outstanding	40,748,924		40,502,878		40,333,333
Incremental shares due to:
Performance shares	117,830		133,766		134,079
Restricted stock units	27,628		69,076		70,217
Stock options	—		3,567		15,520
Diluted weighted-average shares outstanding	40,894,382		40,709,287		40,553,149
Basic net income per share	$	2.21	$	1.74	$	1.06
Diluted net income per share	$	2.20	$	1.73	$	1.05
Anti-dilutive shares excluded from the calculation:
Performance shares	—		3,441		—
Restricted stock units	1,216		—		315
Total anti-dilutive shares excluded from the calculation	1,216		3,441		315