EXHIBIT 12

STATEMENT REGARDING COMPUTATION

OF RATIO OF EARNINGS TO FIXED CHARGES

AND RATIO OF EARNINGS TO COMBINED FIXED CHARGES

AND PREFERRED STOCK DIVIDENDS

(UNAUDITED)

	Year Ended December 31
	2000			2001			2002			2003			2004
	(dollars in thousands)
Earnings:
Income from continuing operations before extraordinary items(1)	$	58,518		$	53,785		$	61,485		$	74,513		$	84,873
Fixed charges		38,866			34,644			44,644			59,833			76,824
Capitalized interest		(3,079	)		(841	)		(170	)		(1,535	)		(875	)
Equity (earnings) losses in less than 50% owned subsidiary		(318	)		(332	)		(15	)		(270	)		0
Earnings	$	93,987		$	87,256		$	105,944		$	132,541		$	160,822
Fixed charges:
Interest expense(2)	$	34,622		$	32,028		$	42,101		$	55,377		$	72,556
Capitalized interest		3,079			841			170			1,535			875
Amortization of loan expenses		1,165			1,775			2,373			2,921			3,393
Fixed charges	$	38,866		$	34,644		$	44,644		$	59,833		$	76,824
Consolidated ratio of earnings to fixed charges		2.42			2.52			2.37			2.22			2.09
Earnings:
Income from continuing operations before extraordinary items(1)	$	58,518		$	53,785		$	61,485		$	74,513		$	84,873
Fixed charges		38,866			34,644			44,644			59,833			76,824
Capitalized interest		(3,079	)		(841	)		(170	)		(1,535	)		(875	)
Equity (earnings) losses in less than 50% owned subsidiary		(318	)		(332	)		(15	)		(270	)		0
Earnings	$	93,987		$	87,256		$	105,944		$	132,541		$	160,822
Fixed charges:
Interest expense(2)	$	34,622		$	32,028		$	42,101		$	55,377		$	72,556
Capitalized interest		3,079			841			170			1,535			875
Amortization of loan expenses		1,165			1,775			2,373			2,921			3,393
Fixed charges		38,866			34,644			44,644			59,833			76,824
Preferred stock dividends		13,490			13,505			12,468			9,218			12,737
Combined fixed charges and preferred stock dividends	$	52,356		$	48,149		$	57,112		$	69,051		$	89,561
Consolidated ratio of earnings to combined fixed charges and preferred stock dividends		1.80			1.81			1.86			1.92			1.80