EXHIBIT 12.1

RATIO OF EARNINGS TO FIXED CHARGES

     Our consolidated ratio of earnings to fixed charges for each of the periods indicated is set forth below:

	THREE MONTHS
	ENDED		YEAR ENDED DECEMBER 31,
	MARCH 31, 2008			2007		2006		2005		2004			2003
	(DOLLARS IN THOUSANDS)
FIXED CHARGES:
Interest costs	$	3,415		$	13,696	$	13,620	$	6,766	$	6,711		$	4,692
Capitalized interest		—			—		—		—		260			1,558
Total fixed charges	$	3,415		$	13,696	$	13,620	$	6,766		6,971			6,250
EARNINGS:
Net income (loss)	$	(2,477)		$	11,707	$	21,464	$	21,913	$	20,351		$	5,913
Add fixed charges per above		3,415			13,696		13,620		6,766		6,971			6,250
Less capitalized interest per above		—			—		—		—		(260	)		(1,558	)
Total earnings, as adjusted	$	938		$	25,403	$	35,084	$	28,679	$	27,062		$	10,605
RATIO OF EARNINGS TO FIXED CHARGES		0.27			1.85		2.58		4.24		3.88			1.70