Basis of Presentation, Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Our “Inventories” line item in the consolidated statements of financial position consisted of the following:


	As of December 31,
(Dollars in thousands)	2020		2019
Raw materials	$	44,976	$	61,338
Work-in-process	25,291		30,043
Finished goods	32,093		41,478
Total inventories	$	102,360	$	132,859

Schedule of property, plant and equipment, estimated useful lives

For financial reporting purposes, provisions for depreciation are calculated on a straight-line basis over the following estimated useful lives of the underlying assets:


Property, Plant and Equipment Classification			Estimated Useful Lives
Buildings and improvements			30-40 years
Machinery and equipment			5-15 years
Office equipment			3-10 years

Our “Property, plant and equipment, net” line item in the consolidated statements of financial position consisted of the following:


	As of December 31,
(Dollars in thousands)	2020		2019
Land and improvements	$	22,589	$	21,697
Buildings and improvements	155,669		165,968
Machinery and equipment	324,773		281,771
Office equipment	59,001		68,349
Property plant and equipment, gross	562,032		537,785
Accumulated depreciation	(365,844)		(341,119)
Property, plant and equipment, net	196,188		196,666
Equipment in process	76,190		63,580
Total property, plant and equipment, net	$	272,378	$	260,246