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Lease Obligations (Tables)
12 Months Ended
Dec. 31, 2017
Leases [Abstract]  
Schedule of Future Minimum Lease Payments for Capital and Operating Leases [Table Text Block]
The future minimum lease payments required under capital leases, together with their present value of capital leases, and operating leases as of December 31, 2017 were as follows:
 
 
(In thousands)
 
Capital
Lease
Obligations
 
Operating
Lease
Obligations
2018
 
$
1,185
 
 
$
3,599
 
2019
 
 
1,185
 
 
 
2,885
 
2020
 
 
1,185
 
 
 
2,187
 
2021
 
 
360
 
 
 
1,582
 
2022
 
 
 
 
 
1,014
 
Thereafter
 
 
 
 
 
564
 
Total minimum lease payments
 
$
3,915
 
 
$
11,831
 
Interest
 
 
(200
 
 
 
Net present of minimum lease payments
 
 
3,715
 
 
 
  
 
Less: Current portion of capital lease obligations
 
 
1,086
 
 
 
 
Long-term capital lease obligations
 
$
2,629