Restructuring and Acquisition Related Costs (Tables)

12 Months Ended

Dec. 31, 2020

Restructuring And Related Activities [Abstract]

Schedule of Restructuring and Acquisition Related Costs

The following table summarizes restructuring and acquisition related costs recorded in the accompanying consolidated statements of operations (in thousands):

	Year Ended December 31,
	2020			2019		2018
2020 restructuring	$	2,736		$	—	$	—
2019 restructuring		988			7,463		378
2018 restructuring		753			1,177	$	1,647
Total restructuring related charges	$	4,477		$	8,640	$	2,025
Acquisition and related charges		(667	)		7,934		6,016
Total restructuring and acquisition related costs	$	3,810		$	16,574	$	8,041

Summary of Restructuring Charges by Reportable Segment

The following table summarizes restructuring costs associated with the 2020 restructuring program by reportable segment (in thousands):

	Year Ended		Cumulative Costs as of
	December 31, 2020		December 31, 2020
Photonics	$	740	$	740
Vision		1,330	$	1,330
Precision Motion		524	$	524
Unallocated Corporate and Shared Services		142	$	142
Total	$	2,736	$	2,736

The following table summarizes restructuring costs associated with the 2019 restructuring program by reportable segment (in thousands):

	Year Ended						Cumulative Costs as of
	December 31, 2020		December 31, 2019		December 31, 2018		December 31, 2020
Photonics	$	508	$	4,983	$	—	$	5,491
Vision		322		1,422		324		2,068
Precision Motion		139		590		—		729
Unallocated Corporate and Shared Services		19		468		54		541
Total	$	988	$	7,463	$	378	$	8,829

The following table summarizes restructuring costs associated with the 2018 restructuring program by reportable segment (in thousands):

	Year Ended						Cumulative Costs as of
	December 31, 2020		December 31, 2019		December 31, 2018		December 31, 2020
Photonics	$	—	$	—	$	—	$	—
Vision		753		1,177		1,579		3,509
Precision Motion		—		—		—		—
Unallocated Corporate and Shared Services		—		—		68		68
Total	$	753	$	1,177	$	1,647	$	3,577

Summary of Accrual Activities by Components Related to Company's Restructuring Charges

The following table summarizes the accrual activities, by component, related to the Company’s restructuring charges recorded in the accompanying consolidated balance sheets (in thousands):

	Total			Severance			Facility			Other⁽¹⁾
Balance at December 31, 2018	$	1,276		$	876		$	388		$	12
Restructuring charges		8,640			4,065			3,798			777
Cash payments		(3,507	)		(2,803	)		—			(704	)
Reclassification of reserves ⁽²⁾		(388	)		—			(388	)		—
Non-cash write-offs and other adjustments ⁽³⁾		(3,948	)		(150	)		(3,798	)		—
Balance at December 31, 2019		2,073			1,988			—			85
Restructuring charges		4,477			3,506			503			468
Cash payments		(4,024	)		(3,229	)		(115	)		(680	)
Non-cash write-offs and other adjustments		(726	)		(584	)		(272	)		130
Balance at December 31, 2020	$	1,800		$	1,681		$	116		$	3

(1)	Other restructuring charges mainly related to consulting fees and relocation costs.

(2)	Accruals related to facilities exited prior to January 1, 2019 were reclassified to operating lease liabilities upon adoption of ASU 2016-02.

(3)

Non-cash write-offs included impairment of operating lease right-of-use assets amounting to $2.6 million associated with the cessations of use of certain leased facilities.