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Secured Credit Facility and Other Debt (Tables)
 6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Debt consists of the following (in thousands):
 
June 30,
2018
 
December 31,
2017
Loans
$
80,321

 
$
85,000

Notes and deferred payments to sellers, Tealstone acquisition
12,967

 
12,393

Notes payable for transportation and construction equipment and other
1,063

 
1,557

Total debt
94,351

 
98,950

 
 
 
 
Less - Current maturities of long-term debt
(826
)
 
(3,978
)
Less - Unamortized deferred loan costs
(7,776
)
 
(8,812
)
Total long-term debt
$
85,749

 
$
86,160