Exhibit 12

Computation of Ratio of Earnings to Fixed Charges
(dollars in thousands)
(unaudited)

													Nine Months Ended
	Year Ended December 31,												September 30,
									2003		2003		2004		2004
	1999		2000		2001		2002		Actual		Proforma (1)		Actual		Proforma (1)
Fixed Charges:
Interest expense on indebtedness	$	5,556	$	14,773	$	42,730	$	49,069	$	45,716	$	41,233	$	41,593	$	38,237
Interest expense on portion of rent expense representative of interest		366		350		478		427		442		442		403		403
Total Fixed Charges	$	5,922	$	15,123	$	43,208	$	49,496	$	46,158	$	41,675	$	41,996	$	38,640
Earnings:
Income before provision for income taxes and minority interest	$	84,735	$	150,727	$	296,635	$	170,380	$	141,634	$	146,117	$	149,542	$	152,898
Fixed charges		5,922		15,123		43,208		49,496		46,158		41,675		41,996		38,640
Total earnings	$	90,657	$	165,850	$	339,843	$	219,876	$	187,792	$	187,792	$	191,538	$	191,538
Ratio of earnings to fixed charges		15.3x		11.0x		7.9x		4.4x		4.1x		4.5x		4.6x		5.0x

(1) The ratio of earnings to fixed charges for the year ended December 31, 2003, and the nine months ended September 30, 2004, have been adjusted on a proforma basis assuming the $333.0 million of 1.875% Notes were outstanding since January 1, 2003, and the $250.0 million of 4.5 % Notes were not outstanding during these periods.