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Long term debt, current and non-current (Tables)
6 Months Ended
Jun. 30, 2021
Long term debt, current and non-current [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]

    

June 30, 2021

    

December 31, 2020

8.375% Senior Unsecured Bond

 

125,000

 

9.5% Senior Unsecured Bond

 

17,800

 

92,000

Secured Term Loans

 

328,035

 

331,056

Total debt outstanding

$

470,835

$

423,056

Less related deferred financing costs

 

(9,320)

 

(2,742)

Total debt, net of deferred financing costs

$

461,515

$

420,314

Less: Current portion of long term debt, net of deferred financing costs current

 

(41,082)

 

(39,217)

Long-term debt, net of current portion and deferred financing costs, non-current

$

420,433

$

381,097

Schedule of Maturities of Long-term Debt [Table Text Block]

Period

    

Principal Repayment

Year 1

$

43,304

Year 2

 

43,304

Year 3

 

179,333

Year 4

 

17,376

Year 5

 

165,576

Year 6 and thereafter

 

21,942

Total

$

470,835