Calculation of Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Earnings Per Share

	Three Months Ended
	March 31,
	2014		2013
(in thousands, except shares and per share data)
Calculation of Basic Earnings Per Share:
Net Income	$	17,681	$	14,869
Weighted average shares outstanding	9,658,431		9,601,529
Basic Earnings Per Share	$	1.83	$	1.55
Calculation of Diluted Earnings Per Share:
Reconciliation of Numerator:
Net Income	$	17,681	$	14,869
Effect of 8.25% Convertible debentures (1)	—		11
Adjusted numerator—Diluted	$	17,681	$	14,880
Reconciliation of Denominator:
Weighted shares outstanding—Basic	9,658,431		9,601,529
Effect of dilutive securities:
Share-based Compensation	35,003		23,132
8.25% Convertible debentures (1)	—		54,289
Adjusted denominator—Diluted	9,693,434		9,678,950
Diluted Earnings Per Share	$	1.82	$	1.54