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Leases (Tables)
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Schedule of Lease Payments and Fair Value Assumptions
The following table includes information regarding the lease term and discount rates utilized in the calculation of the present value of net future minimum lease payments:
 
Finance
Leases
 
Operating
Leases
Weighted Average Remaining Lease Term
1.5 years
 
2.5 years
Weighted Average Discount Rate
3.00%
 
6.07%

Our expenses and payments for operating leases were as follows:
 
Year Ended December 31,
(Dollars in thousands)
2019
 
2018
 
2017
Operating leases expense
$
3,119

 
$
3,850

 
$
3,819

Short-term leases expense
$
192

 
$
112

 
$
236

Payments on operating lease obligations
$
2,967

 
$
3,850

 
$
3,819
Schedule of Assets and Liabilities Related to Finance and Operating Leases
Our assets and liabilities balances related to finance and operating leases reflected in the consolidated statements of financial position, were as follows:
 
 
As of December 31,
(Dollars in thousands)
Financial Statement Line Item
2019
 
2018
Finance lease right-of-use assets
Property, plant and equipment, net
$
6,280

 
$
6,750

Operating lease right-of-use assets
Other long-term assets
$
4,656

 
$
—

 
 
 
 
 
Finance lease obligations, current portion
Other accrued liabilities
$
400

 
$
420

Finance lease obligations, non-current portion
Other long-term liabilities
$
4,140

 
$
4,629

Total finance lease obligations
 
$
4,540

 
$
5,049

 
 
 
 
 
Operating lease obligations, current portion
Other accrued liabilities
$
2,343

 
$
—

Operating lease obligations, non-current portion
Other long-term liabilities
$
2,334

 
$
—

Total operating lease obligations
 
$
4,677

 
$
—
Schedule of Finance Lease Liability Maturity
The following table includes future minimum lease payments under finance and operating leases together with the present value of the net future minimum lease payments as of December 31, 2019:
 
Finance
 
Operating
(Dollars in thousands)
Leases in Effect
 
Leases Signed
 
Less: Leases Not Yet Commenced
 
Leases in Effect
2020
$
532

 
$
2,570

 
$
(128
)
 
$
2,442

2021
4,202

 
1,649

 
(128
)
 
1,521

2022
—

 
919

 
(101
)
 
818

2023
—

 
332

 
(101
)
 
231

2024
—

 
131

 
(101
)
 
30

Thereafter
—

 
2

 
—

 
2

Total lease payments
4,734

 
5,603

 
(559
)
 
5,044

Less: Interest
(194
)
 
(389
)
 
22

 
(367
)
Present Value of Net Future Minimum Lease Payments
$
4,540

 
$
5,214

 
$
(537
)
 
$
4,677
Schedule of Operating Lease Liability Maturity
The following table includes future minimum lease payments under finance and operating leases together with the present value of the net future minimum lease payments as of December 31, 2019:
 
Finance
 
Operating
(Dollars in thousands)
Leases in Effect
 
Leases Signed
 
Less: Leases Not Yet Commenced
 
Leases in Effect
2020
$
532

 
$
2,570

 
$
(128
)
 
$
2,442

2021
4,202

 
1,649

 
(128
)
 
1,521

2022
—

 
919

 
(101
)
 
818

2023
—

 
332

 
(101
)
 
231

2024
—

 
131

 
(101
)
 
30

Thereafter
—

 
2

 
—

 
2

Total lease payments
4,734

 
5,603

 
(559
)
 
5,044

Less: Interest
(194
)
 
(389
)
 
22

 
(367
)
Present Value of Net Future Minimum Lease Payments
$
4,540

 
$
5,214

 
$
(537
)
 
$
4,677