Exhibit 12

STATEMENT REGARDING COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

	For the Year Ended December 31,
(dollars in thousands)	2007		2006		2005		2004		2003
Income before net loss on real estate disposals, income taxes, minority interest, discontinued operations and preferred stock dividends and issuance costs	$	120,351	$	125,964	$	119,297	$	93,537	$	89,935
Interest expense
Senior notes payable and other debt		204,218		136,544		100,431		61,979		57,498
United States settlement		—		—		—		—		4,943
Earnings	$	324,569	$	262,508	$	219,728	$	155,516	$	152,376
Interest expense
Senior notes payable and other debt	$	204,218	$	136,544	$	100,431	$	61,979	$	57,498
United States settlement		—		—		—		—		4,943
Fixed charges	$	204,218	$	136,544	$	100,431	$	61,979	$	62,441
Ratio of Earnings to Fixed Charges		1.59		1.92		2.19		2.51		2.44