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Long-Term Compensation Plan and Stock Based Compensation - Allocation of Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Compensation expense        
Restricted stock $ 677 $ 1,009 $ 1,229 $ 1,809
Long-term compensation plan 755 389 1,258 941
Total Compensation $ 1,432 $ 1,398 $ 2,487 $ 2,750