Nine Months

Ended

September 30,

Year Ended December 31,

2018

2017

2016

2015

2014

2013

Ratio of earnings to fixed charges:

Pre-tax (loss) income (attributable) available to

   common stock adjusted to exclude income or

   loss from equity investees

$

(31,569

)

$

56,460

$

(14,512

)

$

(32,403

)

$

55,189

$

14,253

Distributed income of equity investees

42

477

809

1,628

413

90

Fixed charges:

Interest expense and amortization of debt discount

   and premium on all indebtedness

58,275

51,514

29,222

18,889

11,391

8,529

Rentals

66

88

87

92

83

81

Total fixed charges

$

58,341

$

51,602

$

29,309

$

18,981

$

11,474

$

8,610

Pre-tax income (loss) available (attributable) to

   common stock adjusted to exclude income or

   loss from equity investees plus fixed charges

   and distributed income of equity investees

$

26,814

$

108,539

$

15,606

$

(11,794

)

$

67,076

$

22,953

Ratio of earnings to fixed charges

(A)

2.1

(A)

(A)

5.8

2.7

Nine Months

Ended

September 30,

Year Ended December 31,

2018

2017

2016

2015

2014

2013

Ratio of earnings to combined fixed charges and

   preferred stock dividends:

Pre-tax (loss) income (attributable) available to

   common stock adjusted to exclude income or

   loss from equity investees

$

(31,569

)

$

56,460

$

(14,512

)

$

(32,403

)

$

55,189

$

14,253

Distributed income of equity investees

42

477

809

1,628

413

90

Preferred stock dividends

437

251

—

—

—

—

Fixed charges:

Interest expense and amortization of debt discount

   and premium on all indebtedness

58,275

51,514

29,222

18,889

11,391

8,529

Rentals

66

88

87

92

83

81

Total fixed charges

$

58,341

$

51,602

$

29,309

$

18,981

$

11,474

$

8,610

Pre-tax income (loss) available (attributable) to

   common stock adjusted to exclude income or

   loss from equity investees plus fixed charges,

   distributed income of equity investees and

   dividends on preferred stock

$

27,251

$

108,790

$

15,606

$

(11,794

)

$

67,076

$

22,953

Ratio of earnings to fixed charges

(B)

2.1

(B)

(B)

5.8

2.7

(A)

For the nine months ended September 30, 2018 and the years ended December 31, 2016 and 2015, the ratio coverage in the period was less than 1:1. The Company would have had to generate additional earnings of $31,527, $13,703, and $30,775, respectively, to achieve coverage of 1:1 in those periods.

(B)

For the nine months ended September 30, 2018 and the years ended December 31, 2016 and 2015, the ratio coverage in the period was less than 1:1. The Company would have had to generate additional earnings of $31,090, $13,703, and $30,775, respectively, to achieve coverage of 1:1 in those periods.