Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Schedule of lease expense, payments for operating leases, and information related to lease term and discount rates

Our expenses and payments for operating leases were as follows:

	Year Ended December 31,
(Dollars in thousands)	2020		2019		2018
Operating leases expense	$	3,257	$	3,119	$	3,850
Short-term leases expense	$	464	$	192	$	112
Payments on operating lease obligations	$	2,893	$	2,967	$	3,850

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	0.8 years	2.5 years
Weighted Average Discount Rate	3.07%	4.57%

Schedule of assets and liabilities balance 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	2020		2019
Finance lease right-of-use assets	Property, plant and equipment, net	$	7,017	$	6,280
Operating lease right-of-use assets	Other long-term assets	$	4,216	$	4,656
Finance lease obligations, current portion	Other accrued liabilities	$	4,755	$	400
Finance lease obligations, non-current portion	Other long-term liabilities	$	322	$	4,140
Total finance lease obligations		$	5,077	$	4,540
Operating lease obligations, current portion	Other accrued liabilities	$	2,275	$	2,343
Operating lease obligations, non-current portion	Other long-term liabilities	$	2,219	$	2,334
Total operating lease obligations		$	4,494	$	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, 2020:

	Finance		Operating
(Dollars in thousands)	Leases in Effect		Leases Signed		Less: Leases Not Yet Commenced		Leases in Effect
2021	4,787		2,435		(93)		2,342
2022	194		1,513		(101)		1,412
2023	187		788		(65)		723
2024	—		299		(40)		259
Thereafter	—		42		(37)		5
Total lease payments	5,168		5,077		(336)		4,741
Less: Interest	(91)		(259)		12		(247)
Present Value of Net Future Minimum Lease Payments	$	5,077	$	4,818	$	(324)	$	4,494

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, 2020:

	Finance		Operating
(Dollars in thousands)	Leases in Effect		Leases Signed		Less: Leases Not Yet Commenced		Leases in Effect
2021	4,787		2,435		(93)		2,342
2022	194		1,513		(101)		1,412
2023	187		788		(65)		723
2024	—		299		(40)		259
Thereafter	—		42		(37)		5
Total lease payments	5,168		5,077		(336)		4,741
Less: Interest	(91)		(259)		12		(247)
Present Value of Net Future Minimum Lease Payments	$	5,077	$	4,818	$	(324)	$	4,494