Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES 

The following table sets forth our ratio of earnings to fixed charges on a reported basis for the periods indicated. Earnings consist of income from continuing operations plus fixed charges. Fixed charges consist of interest expense, amortization of deferred financing costs and costs related to retiring certain debt early.  We have calculated the ratio of earnings to fixed charges by adding net income from continuing operations to fixed charges and dividing that sum by such fixed charges.

	Year Ended December 31,															Three Months Ended March 31,
	2010			2011			2012			2013			2014			2014			2015
	(in thousands)
Income from continuing operations before income taxes	$	58,436		$	52,606		$	120,698		$	172,521		$	221,349		$	55,829		$	43,052
Interest expense		90,602			86,899			106,096			92,048			126,869			30,043			43,089
Income before fixed charges	$	149,038		$	139,505		$	226,794		$	264,569		$	348,218		$	85,872		$	86,141
Capitalized interest	$	22		$	139		$	240		$	190		$	—		$	—		$	20
Interest expense		90,602			86,899			106,096			92,048			126,869			30,043			43,089
Total fixed charges	$	90,624		$	87,038		$	106,336		$	92,238		$	126,869		$	30,043		$	43,109
Earnings / fixed charge coverage ratio		1.6	x		1.6	x		2.1	x		2.9	x		2.7	x		2.9	x		2.0	x