Restructuring and Acquisition Related Costs (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2019		2018		2017
2019 restructuring	$	7,463	$	378	$	—
2018 restructuring		1,177		1,647		—
2016 restructuring		—		—		332
2011 restructuring		—		—		14
Total restructuring related charges	$	8,640	$	2,025	$	346
Acquisition and related charges		7,934		6,016		7,196
Total restructuring and acquisition related costs	$	16,574	$	8,041	$	7,542

Summary of Restructuring Program By Reportable Segment

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, 2019		December 31, 2018		December 31, 2019
Photonics	$	4,983	$	—	$	4,983
Vision		1,422		324		1,746
Precision Motion		590		—		590
Unallocated Corporate and Shared Services		468		54		522
Total	$	7,463	$	378	$	7,841

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, 2019		December 31, 2018		December 31, 2019
Photonics	$	—	$	—	$	—
Vision		1,177		1,579		2,756
Precision Motion		—		—		—
Unallocated Corporate and Shared Services		—		68		68
Total	$	1,177	$	1,647	$	2,824

The following table summarizes restructuring costs associated with the 2016 restructuring program by reportable segment (in thousands):

	Year Ended		Cumulative Costs as of
	December 31, 2017		December 31, 2017
Photonics	$	—	$	868
Vision		331		4,393
Precision Motion		—		939
Unallocated Corporate and Shared Services		1		329
Total	$	332	$	6,529

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, 2017	$	806		$	39		$	763		$	4
Restructuring charges		2,025			1,862			—			163
Cash payments		(1,490	)		(962	)		(373	)		(155	)
Non-cash write-offs and other adjustments		(65	)		(63	)		(2	)		—
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

(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 cessation of use of certain leased facilities.