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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Accounts Receivable, Allowance for Credit Loss

The below table shows the roll forward of the allowance for doubtful accounts for the years ended December 31, 2023, 2022 and 2021:

			Balance at Beginning of Period						Charged to Costs and Expenses						Other						Deductions						Balance at End of Period
Dollars in thousands
Year Ended:
December 31, 2023			$	4,304					2,963						—						(2,388)						$	4,879
December 31, 2022			$	4,735					238						—						(669)						$	4,304
December 31, 2021			$	6,439					(1,059)						341						(986)						$	4,735

(1)Deductions primarily relates to allowance for doubtful accounts written off during the year, net of recoveries and other adjustments.

Schedule of Inventories

Inventories consisted of the following:

			December 31,
Dollars in thousands			2023						2022
Finished goods			196,402						$	172,088
Work in process			74,035						70,598
Raw materials			119,171						81,897
Total inventories, net			$	389,608					$	324,583

Schedule of Property, Plant and Equipment Balances and Corresponding Lives

Property, plant and equipment balances and corresponding lives were as follows:

			December 31,
Dollars in thousands			2023						2022						Useful Lives
Land			$	978					$	966
Buildings and building improvements			14,859						14,710						5-40 years
Leasehold improvements			171,062						163,342						1-20 years
Machinery and production equipment			198,127						182,730						3-20 years
Demonstration equipment			3,896						3,792						4-5 years
Information systems and hardware			160,899						151,330						1-7 years
Furniture, fixtures, and office equipment			20,549						20,286						1-15 years
Construction-in-progress			137,276						103,875
Total			707,646						641,031
Less: Accumulated depreciation			(367,447)						(329,729)
Property, plant and equipment, net			$	340,199					$	311,302

Restructuring and Related Costs

The following table summarizes the restructuring related accrual balances included within accrued expenses and other current liabilities in the consolidated balance sheet for the year ended December 31, 2023 and 2022.

						Years Ended December 31,
(Dollars in thousands)						2023						2022
Balance, beginning of the year						$	5,107					$	10,226
Charges:
Cost of Goods Sold						—						1,494
Research and development						—						72
Selling, general and administrative						1,048						5,582
Payments and other adjustments						(4,042)						(12,267)
Balance, end of the year						$	2,113					$	5,107

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