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Capitalized Interest (Tables)
 9 Months Ended
Sep. 30, 2017
Interest Expense [Abstract]  
Summary of Interest Incurred, Capitalized and Expensed

The following table sets forth details of interest incurred, capitalized and expensed:

 

 

 

Three months ended

September 30

 

 

Nine months ended

September 30

 

In thousands

 

2017

 

 

2016

 

 

2017

 

 

2016

 

Interest cost incurred

 

$

5,079

 

 

$

4,334

 

 

$

14,556

 

 

$

12,962

 

Interest capitalized

 

 

532

 

 

 

439

 

 

 

1,525

 

 

 

998

 

Interest expense

 

$

4,547

 

 

$

3,895

 

 

$

13,031

 

 

$

11,964