Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Three Months Ended March 31,
	2013		2012
Numerator:
Net income available to common shareholders	$	21,569	$	12,311
Denominator:
Basic weighted average shares outstanding		16,883,111		15,473,777
Effect of dilutive securities:
SARs and options		330,075		450,686
Convertible notes		—		776,015
Restricted stock		67,259		17,509
Diluted weighted average shares outstanding		17,280,445		16,717,987
Basic earnings per share	$	1.28	$	0.80
Diluted earnings per share	$	1.25	$	0.74

Antidilutive securities excluded from computation of earnings per share

	Three Months Ended March  31,
	2013		2012
Restricted stock and stock options		32,872		135,521
Stock appreciation rights		30,753		136,410