EXHIBIT 12.1

RATIO OF EARNINGS TO FIXED CHARGES

	YEARS ENDED SEPTEMBER 30,
(IN THOUSANDS)											9 MONTHS ENDED
	2005		2006		2007		2008		2009		June 30, 2010
PRE-TAX INCOME		25,608		91,836		159,959		244,775		296,431		242,772
TOTAL FIXED CHARGES LESS CAPITALIZED INTEREST		7,352		5,166		1,689		1,410		2,293		2,010
AMORTIZATION OF CAPITALIZED INTEREST		—		—		—		—		90		162
TOTAL EARNINGS		32,960		97,002		161,645		246,185		298,814		244,944
NET INTEREST EXPENSE		7,352		5,166		1,689		1,410		2,293		2,010
INTEREST PORTION OF RENTAL EXPENSE		—		—		—		—		—		—
CAPITALIZED INTEREST		—		1,631		2,641		2,606		8,786		3,120
TOTAL FIXED CHARGES		7,352		6,797		4,330		4,016		11,079		5,130
RATIO		4.5		14.3		37.3		61.3		27.0		47.7
DEFICIENCY		—		—		—		—		—		—