	September 30, 2022			December 31, 2021
Land and land improvements	$	9,687		$	10,377
Buildings		60,635			63,166
Machinery and equipment		342,973			345,118
Construction-in-process		16,100			11,019
Other		6,763			6,798
		436,158			436,478
Accumulated depreciation and amortization		(283,130	)		(277,915	)
Property, plant and equipment, net	$	153,028		$	158,563

The land and building of Union Electric Steel UK Limited, an indirect subsidiary of the Corporation (“UES-UK”), equal to $2,362 (£2,122) at September 30, 2022, are held as collateral by the trustees of the UES-UK defined benefit pension plan (Note 7). Machinery and equipment purchased with proceeds from the equipment finance facility (Note 6), equal to $4,014 at September 30, 2022, are included in construction-in-process and pledged as collateral for the facility. The remaining assets, other than real property, of the Corporation are pledged as collateral for the Corporation’s revolving credit facility (Note 6).

Certain land and land improvements and buildings were included sale and leaseback financing transactions (Note 6). Title to these assets lie with the lender; however, since the transactions qualified as financing transactions, versus sales, the assets remain recorded on the Corporation’s consolidated balance sheet.

The gross value of assets under finance leases and the related accumulated amortization approximated $4,188 and $1,287, respectively, as of September 30, 2022, and $3,882 and $1,263, respectively, at December 31, 2021. Depreciation expense approximated $4,117 and $4,210, including depreciation of assets under finance leases of approximately $77 and $124, for the three months ended September 30, 2022, and 2021, respectively. Depreciation expense approximated $12,854 and $13,071, including depreciation of assets under finance leases of approximately $337 and $342, for the nine months ended September 30, 2022, and 2021, respectively.