Restructuring, Acquisition and Divestiture Related Costs (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring And Related Activities [Abstract]

Schedule of Restructuring, Acquisition and Divestiture Related Costs

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

	Year Ended December 31,
	2018		2017		2016
2019 restructuring	$	378	$	—	$	—
2018 restructuring		1,647		—		—
2016 restructuring		—		332		3,049
2011 restructuring		—		14		(79	)
Total restructuring and divestiture related charges	$	2,025	$	346	$	2,970
Acquisition and related charges		6,016		7,196		4,975
Total restructuring, acquisition and divestiture related costs	$	8,041	$	7,542	$	7,945

Summary of Restructuring Costs for Each Segment and Unallocated Corporate Costs

The following table summarizes restructuring costs incurred to date and the Company’s expected cumulative costs associated with the 2018 restructuring program (in thousands):

	Year Ended		Expected Cumulative Costs
	December 31, 2018		December 31, 2018
Photonics	$	—	$	—
Vision		1,579	$2,300 - $2,600
Precision Motion		—		—
Unallocated Corporate and Shared Services		68		$100
Total	$	1,647	$	$2,400 - $2,700

The following table summarizes restructuring costs associated with the 2016 restructuring program for each segment and unallocated corporate costs (in thousands):

	Year Ended				Cumulative Costs as of
	December 31, 2017		December 31, 2016		December 31, 2017
Photonics	$	—	$	813	$	868
Vision		331		1,862		4,393
Precision Motion		—		106		939
Unallocated Corporate and Shared Services		1		268		329
Total	$	332	$	3,049	$	6,529

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2011 restructuring plan (in thousands):

						Cumulative
	Year Ended December 31,					Costs as of
	2017		2016			December 31, 2017
Photonics	$	—	$	(188	)	$	1,751
Vision		—		—			48
Precision Motion		—		—			122
Unallocated Corporate and Shared Services		14		109			3,276
Total	$	14	$	(79	)	$	5,197

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 (a)
Balance at December 31, 2016	$	1,736		$	611		$	1,111		$	14
Restructuring charges		346			185			146			15
Cash payments		(1,212	)		(692	)		(503	)		(17	)
Non-cash write-offs and other adjustments		(64	)		(65	)		9			(8	)
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

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