Three Months Ended March 31,

2018

Earnings:

Income before income taxes

$

6,359

Plus fixed charges deducted from income:

Interest expense

2,398

Amortization of debt financing fees

201

Implicit interest in rents

967

Total Earnings (x)

$

9,925

Fixed Charges:

Interest expense

2,398

Capitalized interest

146

Amortization of debt financing fees

201

Implicit interest in rents

967

Total Fixed Charges (y)

$

3,712

Ratio of Earnings to Fixed Charges(1)

2.7

Year Ended December 31,

2017

2016

2015

2014

2013

Earnings:

Income before income taxes

$

35,882

$

25,386

$

31,200

$

31,572

$

19,838

Plus fixed charges deducted from income:

Interest expense

7,736

8,798

6,229

8,829

8,044

Amortization of debt financing fees

685

952

987

987

845

Implicit interest in rents

3,437

3,089

2,884

2,179

1,488

Total Earnings (x)

$

47,740

$

38,225

$

41,300

$

43,567

$

30,216

Fixed Charges:

Interest expense

7,736

8,798

6,229

8,829

8,044

Capitalized interest

513

460

325

389

1,038

Amortization of debt financing fees

685

952

987

987

845

Implicit interest in rents

3,437

3,089

2,884

2,179

1,488

Total Fixed Charges (y)

$

12,371

$

13,299

$

10,425

$

12,385

$

11,416

Ratio of Earnings to Fixed Charges(1)

3.9

2.9

4.0

3.5

2.6