Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,															Three Months Ended
	2009			2010			2011			2012			2013			March 31, 2014
	(in thousands, except ratio)
Pre-tax income from continuing operations before adjustment for noncontrolling interests in consolidated subsidiaries or income or loss from equity investees	$	8,471		$	(50,074	)	$	46,807		$	73,787		$	62,174		$	22,598
Capitalized interest		(112	)		(84	)		(106	)		(3,891	)		(13,324	)		(4,050	)
Depreciation of capitalized interest		30			36			43			302			1,190			1,460
Distributions from 50% or less owned companies carried at equity		950			6,482			20,028			38,809			46,564			12,580
Adjusted pre-tax income from continuing operations before adjustment for noncontrolling interests in consolidated subsidiaries or income or loss from equity investees	$	9,339		$	(43,640	)	$	66,772		$	109,007		$	96,604		$	32,588
Fixed charges
Interest on long-term debt	$	13,736		$	22,992		$	35,771		$	40,923		$	48,583		$	12,804
Capitalized interest		112			84			106			3,891			13,324			4,050
Rental expenses representative of an interest factor		2,990			3,904			4,570			5,383			6,919			2,538
Total fixed charges	$	16,838		$	26,980		$	40,447		$	50,197		$	68,826		$	19,392
Adjusted pre-tax income from continuing operations before adjustment for noncontrolling interests in consolidated subsidiaries or income or loss from equity investees plus total fixed charges	$	26,177		$	(16,660	)	$	107,219		$	159,204		$	165,430		$	51,980
RATIO OF EARNINGS TO FIXED CHARGES		1.6			—			2.7			3.2			2.4			2.7