Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Shareholders' Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss

	Years Ended December 31,
	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		247		278		(31)		630		671		(41)
Actuarial gains (losses)		5,100		5,282		(182)		(13,339)		(13,240)		(99)
Balance, end of period	$	(32,294)	$	(32,443)	$	149	$	(37,641)	$	(38,003)	$	362