

	June 30,		December 31,
(Dollars in thousands)	2021		2020
Current liabilities
Liability for demolition costs		2,840		2,928
Accrued pension		684		684
Security deposit payable		52		132
Finance lease liabilities		49		49
Other		33		33
Other current liabilities	$	3,658	$	3,826
Other liabilities
Lease make-good provision		7,670		7,408
Accrued pension		3,829		4,048
Deferred rent liability		2,035		2,897
Environmental reserve		1,656		1,656
Lease liability		5,900		5,900
Acquired leases		26		31
Finance lease liabilities		44		69
Other		1		8
Other non-current liabilities	$	21,161	$	22,017

On August 29, 2014, the Supplemental Executive Retirement Plan (“SERP”) that has been effective since March 1, 2007, was ended and replaced in accordance with the terms of a pension annuity. As a result of the termination of the SERP program, the accrued pension liability of $7.6 million was reversed and replaced with this pension annuity liability of $7.5 million. The valuation of the liability is based on the present value of $10.2 million discounted at a rate of 4.25% over a 15-year term, resulting in a monthly payment of $57,000. The discounted value of $2.7 million (which is the difference between the estimated payout of $10.2 million and the present value of $7.5 million) as of August 29, 2014 will be amortized and expensed based on the 15-year term. In addition, the accumulated actuarial loss of $3.1 million recorded, as part of other comprehensive income will also be amortized based on the 15-year term.

In February 2018, we made a payment of $2.4 million relating to the annuity representing payments for the 42 months outstanding at the time. Monthly ongoing payments of $57,000 are now being made.

As a result of the above, included in our current and non-current liabilities are accrued pension costs of $4.5 million at June 30, 2021. The benefits of our pension plan are fully vested and therefore no service costs were recognized for the six months ended June 30, 2021 and 2020. Our pension plan is unfunded.

During the quarter and six months ended June 30, 2021, the interest cost was $61,000 and $123,000, and the actuarial loss was $51,000 and $104,000. During the quarter and six months ended June 30, 2020, the interest cost was $66,000 and $134,000 and the actuarial loss was $51,000 and $103,000