Exhibit 12.1

COMPUTATION OF RATIO EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED DIVIDENDS

(dollars in thousands)

	For the Period
	from January 1, 2018 to		Year Ended December 31,
	June 30, 2018		2017		2016		2015		2014			2013
Income (Loss) from Continuting Operations Before Income Taxes	$	32,112	$	102,084	$	127,195	$	97,205	$	169,013		$	22,715
Fixed Charges	21,236		40,368		44,493		56,096		62,715			62,850
Amortization of Capitalized Interest	1		28		42		55		70			70
Capitalized Interest	—		—		—		—		(914		)	(1,516		)
Earnings	$	53,349	$	142,480	$	171,730	$	153,356	$	230,884		$	84,119
Fixed Charges:
Interest Expense	$	20,151	$	38,481	$	41,735	$	52,684	$	58,278		$	57,279
Portion of Rent Related to Interest	1,085		1,887		2,758		3,412		3,523			4,055
Capitalized Interest	—		—		—		—		914			1,516
Fixed Charges	21,236		40,368		44,493		56,096		62,715			62,850
Preferred Stock Dividends
Combined Fixed Charges and Preferred Stock Dividends	$	21,236	$	40,368	$	44,493	$	56,096	$	62,715		$	62,850
Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends	2.51		3.53		3.86		2.73		3.68			1.34
Deficiency of Earnings to Fixed Charges and Preferred Stock Dividends	$	—	$	—	$	—	$	—	$	—		$	—