Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Shareholders' Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss

	Three Months Ended September 30,
	2019						2018
	Total		Defined benefit pension plans		Other post- employment benefit plans		Total		Defined benefit pension plans		Other post- employment benefit plans
Balance, beginning of period	$	(37,516)	$	(37,864)	$	348	$	(24,617)	$	(25,099)	$	482
Amortization		63		70		(7)		158		168		(10)
Balance, end of period	$	(37,453)	$	(37,794)	$	341	$	(24,459)	$	(24,931)	$	472

	Nine Months Ended September 30,
	2019						2018
	Total		Defined benefit pension plans		Other post- employment benefit plans		Total		Defined benefit pension plans		Other post- employment benefit plans
Balance, beginning of period	$	(37,641)	$	(38,003)	$	362	$	(24,932)	$	(25,434)	$	502
Amortization		188		209		(21)		473		503		(30)
Balance, end of period	$	(37,453)	$	(37,794)	$	341	$	(24,459)	$	(24,931)	$	472