Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

(dollars in thousands)

	Quarter Ended			Year Ended
	31-Mar-13			2012			2011			2010			2009			2008
Income from continuing operations	$	12,976		$	51,311		$	49,542		$	45,595		$	44,248		$	43,080
Add: Fixed charges	3,310			10,062			6,479			2,770			2,458			4,174
Less: Capitalized interest	(177		)	(130		)	(45		)	(117		)	(40		)	(60		)
Less: Minority interest in pre-tax income that have not incurred fixed charges (equity method investees)	—			(37		)	(191		)	(191		)	(296		)	(307		)
Earnings	$	16,109		$	61,206		$	55,785		$	48,057		$	46,370		$	46,887
Fixed Charges
Interest expense (includes amortization of debt issue costs and capitalized interest)	3,310			10,062			6,479			2,770			2,458			4,174
Estimated interest in rental expense	—			—			—			—			—			—
Total fixed charges	3,310			10,062			6,479			2,770			2,458			4,174
Preferred stock dividend (excludes preferred stock redemption charge)	818			3,273			5,512			13,662			15,141			15,390
Total fixed charges and preferred dividends	$	4,128		$	13,335		$	11,991		$	16,432		$	17,599		$	19,564
Ratio of earnings to fixed charges	4.87			6.08			8.61			17.35			18.86			11.23
Ratio of earnings to fixed charges and preferred dividends	3.90			4.59			4.65			2.92			2.63			2.40