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Details of Selected Balance Sheet Accounts (Tables)

9 Months Ended

Sep. 30, 2022

Details of Selected Balance Sheet Accounts [Abstract]

Schedule of Accounts Receivable, Net

Additional information regarding selected balance sheet accounts as of September 30, 2022 and December 31, 2021 is presented below (in thousands):

			September 30, 2022						December 31, 2021
Accounts receivable, net:
Trade			$	145,949					$	116,434
Unbilled revenue			23,412						24,389
Contract assets			36,752						39,755
Other			7,564						9,973
Total accounts receivable			213,677						190,551
Allowance for doubtful accounts			(4,399)						(4,471)
			$	209,278					$	186,080
Allowance for doubtful accounts as a percentage of total accounts receivable			2		%				2		%

Schedule of Contract with Customer, Asset and Liability

			September 30, 2022						December 31, 2021
Deferred revenue (contract liabilities)			$	50,732					$	43,236

Schedule of Activity in Allowance for Doubtful Accounts

The following provides a summary of activity in the allowance for doubtful accounts for the nine months ended September 30, 2022 and 2021 (in thousands):

			Nine Months Ended September 30,
			2022						2021
Allowance for doubtful accounts – January 1			$	4,471					$	8,304
Provisions			1,237						20
Write-offs			(1,581)						(2,200)
Other			272						136
Allowance for doubtful accounts – September 30			$	4,399					$	6,260

Schedule of Inventory, Net

			September 30, 2022						December 31, 2021
Inventories, net:
Finished goods and purchased products			$	87,542					$	87,934
Work in process			29,652						24,722
Raw materials			102,120						96,357
Total inventories			219,314						209,013
Allowance for excess or obsolete inventory			(37,686)						(40,440)
			$	181,628					$	168,573

Schedule of Property, Plant and Equipment, Net

									September 30, 2022						December 31, 2021
Property, plant and equipment, net:
Property, plant and equipment						$	1,121,891					$	1,151,533
Accumulated depreciation						(816,824)						(812,950)
																					$	305,067					$	338,583

Schedule of Finite-Lived Intangible Assets

			September 30, 2022																		December 31, 2021
			Gross Carrying Amount						Accumulated Amortization						Net Carrying Amount						Gross Carrying Amount						Accumulated Amortization						Net Carrying Amount
Other intangible assets:
Customer relationships			$	149,673					$	53,925					$	95,748					$	168,284					$	66,734					$	101,550
Patents/Technology/Know-how			79,769						37,747						42,022						78,821						33,151						45,670
Tradenames and other			53,956						17,544						36,412						53,708						15,179						38,529
			$	283,398					$	109,216					$	174,182					$	300,813					$	115,064					$	185,749

Schedule of Other Noncurrent Assets

			September 30, 2022						December 31, 2021
Other noncurrent assets:
Deferred compensation plan			$	18,198					$	23,348
Deferred financing costs			2,093						2,674
Deferred income taxes			1,255						1,878
Other			4,751						4,989
			$	26,297					$	32,889

Schedule of Accrued Liabilities

			September 30, 2022						December 31, 2021
Accrued liabilities:
Accrued compensation			$	26,909					$	20,904
Accrued taxes, other than income taxes			9,268						5,130
Insurance liabilities			4,953						6,361
Accrued interest			3,527						3,629
Accrued commissions			2,176						2,194
Other			4,858						5,183
			$	51,691					$	43,401

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Tabular disclosure of allowance for credit loss on accounts receivable.

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