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Details of Selected Balance Sheet Accounts (Tables)

12 Months Ended

Dec. 31, 2021

Details of Selected Balance Sheet Accounts [Abstract]

Schedule of Accounts Receivable, Net

Additional information regarding selected balance sheet accounts as of December 31, 2021 and December 31, 2020 is presented below (in thousands):

			2021						2020
Accounts receivable, net:
Trade			$	116,434					$	109,294
Unbilled revenue			24,389						23,173
Contract assets			39,755						35,870
Other			9,973						3,102
Total accounts receivable			190,551						171,439
Allowance for doubtful accounts			(4,471)						(8,304)
			$	186,080					$	163,135
Allowance for doubtful accounts as a percentage of total accounts receivable			2		%				5		%

Schedule of Contract with Customer, Asset and Liability

			2021						2020
Deferred revenue (contract liabilities)			$	43,236					$	43,384

Schedule of Inventory, Net

			2021						2020
Inventories, net:
Finished goods and purchased products			$	87,934					$	88,634
Work in process			24,722						27,063
Raw materials			96,357						95,410
Total inventories			209,013						211,107
Allowance for excess or obsolete inventory			(40,440)						(40,731)
			$	168,573					$	170,376

Schedule of Property, Plant and Equipment, Net

			Estimated Useful Life (years)																		2021						2020
Property, plant and equipment, net:
Land																					$	33,536					$	34,968
Buildings and leasehold improvements			1						–						40						255,530						267,072
Machinery and equipment			2						–						28						247,285						239,986
Completion-related rental equipment			1						–						10						510,816						507,755
Office furniture and equipment			1						–						10						33,155						35,767
Vehicles			3						–						10						66,431						81,607
Construction in progress																					4,780						7,207
Total property, plant and equipment																					1,151,533						1,174,362
Accumulated depreciation																					(812,950)						(790,800)
																					$	338,583					$	383,562

Schedule of Other Noncurrent Assets

			2021						2020
Other noncurrent assets:
Deferred compensation plan			$	23,348					$	22,801
Deferred financing costs			2,674						—
Deferred income taxes			1,878						1,280
Other			4,989						5,646
			$	32,889					$	29,727

Schedule of Accrued Liabilities

			2021						2020
Accrued liabilities:
Accrued compensation			$	20,904					$	18,463
Accrued taxes, other than income taxes			5,130						7,307
Insurance liabilities			6,361						7,694
Accrued interest			3,629						2,202
Accrued commissions			2,194						1,416
Other			5,183						7,422
			$	43,401					$	44,504

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Details of Selected Balance Sheet Accounts [Abstract]

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Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

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Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

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Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

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Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.

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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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