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Restructuring and Other Initiatives (Tables)
 3 Months Ended
Mar. 31, 2019
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Reserves and Charges
The following table summarizes the reserves and charges related to restructuring and other initiatives, including postemployment benefit reserves and charges:

Three Months Ended

March 31, 2019

March 31, 2018
Balance at beginning of period
$
1,122


$
227

Additions, interest accretion and other
46


455

Payments
(317
)

(37
)
Revisions to estimates and effect of foreign currency
(21
)

(12
)
Balance at end of period
$
830


$
633