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Other non-operating income / (expense) (Tables)
12 Months Ended
Dec. 31, 2016
Other non-operating income / (expense)  
Schedule of other non-operating income / (expense)

                                                                                                                                                                                    

 

 

Years ended December 31,

 

 

 

2016

 

2015

 

2014

 

 

 

in thousands

 

Other non-operating income:

 

 

 

 

 

 

 

 

 

 

Derivative gains

 

$

785

 

$

423

 

$

21

 

​  

​  

​  

​  

​  

​  

Total other non-operating income:

 

$

785

 

$

423

 

$

21

 

​  

​  

​  

​  

​  

​  

Other non-operating expense:

 

 

 

 

 

 

 

 

 

 

Derivative losses

 

 

 

 

(7,587

)

 

 

​  

​  

​  

​  

​  

​  

Total other non-operating expense:

 

$

 

$

(7,587

)

$

 

​  

​  

​  

​  

​  

​  

Other non-operating income/(expense)—net

 

$

785

 

$

(7,164

)

$

21

 

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​