Restructuring Activities (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Reconciliation of Accrual for Workforce Reduction

The following is a reconciliation of the accrual for the workforce reduction that is included within the "Accrued Liabilities" line of the consolidated balance sheets twelve-months ending December 31, 2018.

	Twelve Months Ended
	2018			2017			2016
Restructuring liability at January 1,	$	391		$	309		$	—
Amounts expensed	—			119			1,428
Amounts expensed - discontinued operations	—			581			—
Amounts paid	(326		)	(618		)	(1,119		)
Restructuring liability at December 31,	$	65		$	391		$	309