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Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Company estimate of the aggregate restructuring cost	$ 2,600		$ 2,600
Restructuring charges	2,528	$ (1,022)	$ 2,859	$ 2,223
Restructuring and Related Cost, Positions Eliminated
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent			4.00%
MID Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	500
RSD Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	600
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,100

X

- Definition

Amount expected to be recognized in earnings for the specified restructuring cost.

+ References

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The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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