Restructuring Programs and Separation Costs (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring And Related Activities [Abstract]

Schedule of Restructuring Program Activity

Liabilities related to the 2017 and 2016 Restructuring Program as of December 31, 2017 and 2016 are included in accrued salaries, wages and benefits in the accompanying consolidated balance sheets.  The 2017 and 2016 Restructuring Program activity for the year ended December 31, 2017 was as follows:

Severance and Other Employment Expenses	2016 Restructuring Program			2017 Restructuring Program			Total
Liability as of December 31, 2016	$	7,842		$	—		$	7,842
Costs incurred		—			5,200			5,200
Reduction in estimated expenses		(572	)		—			(572	)
Payments made		(7,270	)		(3,966	)		(11,236	)
Liability as of December 31, 2017	$	—		$	1,234		$	1,234