Exhibit 12.1

Ratio of Earnings to Fixed Charges

(Unaudited)

	For the Year Ended December 31,
$s in thousands	2012		2011		2010		2009		2008
Earnings (as defined):
Earnings before income taxes	$	41,718	$	29,807	$	22,186	$	23,483	$	35,233
Fixed charges		900		1,635		368		105		155
Earnings	$	42,618	$	31,442	$	22,554	$	23,588	$	35,388
Fixed charges (as defined):
Interest expense	$	878	$	1,604	$	320	$	2	$	7
Estimated interest within rental expense		22		31		48		103		148
Fixed charges	$	900	$	1,635	$	368	$	105	$	155
Ratio of earnings to fixed charges		47.3		19.2		61.2		225.1		228.2