EX-12.1 6 d655751dex121.htm EX-12.1 EX-12.1

EXHIBIT 12.1

Computation of Ratio of Debt to Equity

 

     Year ended December 31,  

Dollars in thousands

    2017    2016      2015      2014      2013  

Debt

    $327,623    $ 349,073      $ 404,540      $ 348,795      $ 314,958  

Equity

    287,159      286,096        278,088        274,670        273,495  

Debt to equity

    1.14      1.22        1.45        1.27        1.15