Exhibit 12.1

STATEMENT RE COMPUTATION OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
	2012			2011			2010			2009			2008
	(In thousands, except ratios)
Ratio of Earnings to Fixed Charges
Earnings:
Income before income taxes	$	209,215		$	174,584		$	79,252		$	7,769		$	56,564
Add:
Amortization of capitalized interest		43			38			36			35			32
Fixed charges, net of capitalized interest		1,179			1,403			1,749			1,966			2,151
Income before income taxes and fixed charges, net	$	210,437		$	176,025		$	81,037		$	9,770		$	58,747
Fixed Charges:
Total interest expense	$	946		$	1,141		$	1,508		$	1,695		$	1,669
Capitalized interest		142			46			18			75			390
Interest factor in rents		233			262			241			271			482
Total fixed charges	$	1,321		$	1,449		$	1,767		$	2,041		$	2,541
Ratio of earnings to fixed charges		159.3	x		121.5	x		45.9	x		4.8	x		23.1	x