Exhibit 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(in thousands, except ratios)

	Years Ended December 31,
	2010			2011			2012			2013			2014
Earnings:
Income (loss) from continuing operations before taxes before adjustment for income or loss from equity investees	$	104,590		$	145,100		$	(165,369	)	$	175,730		$	220,110
Amortization of previously capitalized interest		—			—			—			40			79
Capitalized interest		—			—			(400	)		(393	)		—
Non-controlling interest income		(861	)		(1,021	)		(955	)		(1,466	)		(1,901	)
Total earnings	$	103,729		$	144,079		$	(166,724	)	$	173,911		$	218,288
Fixed Charges:
Interest expense	$	72,281		$	57,010		$	55,149		$	41,946		$	49,561
Amortization of debt expense		7,750			13,526			14,416			14,959			15,897
Capitalized interest		—			—			400			393			—
Interest factor in rents (1)		10,477			9,977			8,071			8,811			9,809
Total fixed charges	$	90,508		$	80,513		$	78,036		$	66,109		$	75,267
Total earnings available for fixed charges	$	194,237		$	224,592		$	(88,688	)	$	240,020		$	293,555
Ratio of earnings to fixed charges		2.1			2.8			—	(2)		3.6			3.9

(1) One-third of all rental expense is deemed to be interest, which we believe to be a reasonable approximation of the interest factor of our leases.

(2) Due to our loss from continuing operations before taxes before adjustment for income or loss from equity investees for the year ended December 31, 2012, the ratio coverage was less than 1:1. We would have needed to generate additional earnings of $166.7 million to achieve a coverage of 1:1.