Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Other Liabilities [Abstract]
Summary Of Other Liabilities Including Pension	September 30, December 31,(Dollars in thousands) 2021 2020Current liabilities Liability for demolition costs 2,808 2,928Accrued pension 684 684Security deposit payable 72 132Finance lease liabilities 45 49Other 41 33 Other current liabilities $ 3,650 $ 3,826Other liabilities Lease make-good provision 7,611 7,408Accrued pension 3,718 4,048Deferred rent liability 2,180 2,897Environmental reserve 1,656 1,656Lease liability 5,900 5,900Acquired leases 23 31Finance lease liabilities 36 69Other — 8 Other non-current liabilities $ 21,124 $ 22,017