Certain Balance Sheet Components

3 Months Ended

Mar. 31, 2022

Balance Sheet Related Disclosures [Abstract]

Certain Balance Sheet Components

Certain Balance Sheet Components

A summary of accounts receivable from contracts with customers is as follows:

Accounts receivable, net
In thousands	March 31, 2022		December 31, 2021
Trade receivables (net of allowance of $5,598 and $5,730)	$	266,774	$	261,124
Unbilled receivables	36,476		37,335
Total accounts receivable, net	$	303,250	$	298,459

Allowance for credit losses account activity	Three Months Ended March 31,
In thousands	2022		2021
Beginning balance	$	5,730	$	1,312
Provision for (release of) doubtful accounts, net	(101)		(67)
Accounts recovered (written-off), net	78		(79)
Effect of change in exchange rates	(109)		(30)
Ending balance	$	5,598	$	1,136

Inventories
In thousands	March 31, 2022		December 31, 2021
Raw materials	$	128,432	$	122,434
Work in process	7,460		7,856
Finished goods	35,367		35,509
Total inventories	$	171,259	$	165,799

Property, plant, and equipment, net
In thousands	March 31, 2022		December 31, 2021
Machinery and equipment	$	311,116	$	314,502
Computers and software	110,885		111,540
Buildings, furniture, and improvements	136,531		131,764
Land	10,625		8,952
Construction in progress, including purchased equipment	35,808		39,527
Total cost	604,965		606,285
Accumulated depreciation	(447,721)		(443,101)
Property, plant, and equipment, net	$	157,244	$	163,184

Depreciation expense	Three Months Ended March 31,
In thousands	2022		2021
Depreciation expense	$	10,284	$	12,837