The following table presents the calculation of basic and diluted earnings per common share for the periods indicated:


	Year Ended December 31,
(Amounts in thousands, except share and per share data)	2013		2012		2011
Net income	$	23,312	$	28,577	$	20,028
Dividends on preferred stock		1,024		1,058		703

Net income available to common shareholders	$	22,288	$	27,519	$	19,325

Weighted average number of common shares outstanding, basic		19,792,099		19,127,065		17,877,421
Dilutive effect of potential common shares from:
Stock options		19,337		4,549		1,390
Restricted stock		5,014		2,107		343
Convertible preferred stock		1,132,998		1,285,848		808,367
Contingently issuable shares		12,352		—		—

Weighted average number of common shares outstanding, diluted		20,961,800		20,419,569		18,687,521

Basic earnings per common share	$	1.13	$	1.44	$	1.08
Diluted earnings per common share	$	1.11	$	1.40	$	1.07

Antidilutive potential common shares:
Stock options		317,420		420,802		393,133
Restricted stock		271		—		2,343

Total potential antidilutive shares		317,691		420,802		395,476