Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Common Share [Abstract]

Summary of earnings per common share

	For the Three Months Ended March 31,
(unaudited, in thousands, except shares and per share amounts)	2013		2012
Numerator for both basic and diluted earnings per common share:
Net income	$	16,021	$	11,990
Denominator:
Total average basic common shares outstanding		29,211,321		26,628,025
Effect of dilutive stock options		57,162		3,162
Total diluted average common shares outstanding		29,268,483		26,631,187
Earnings per common share - basic	$	0.55	$	0.45
Earnings per common share - diluted	$	0.55	$	0.45