Discontinued Operations Discontinued Operations (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets of discontinued operations	$ 0	$ 22,463
Non-current assets of discontinued operations	0	41,150
Current liabilities of discontinued operations	0	6,257
Non-current liabilities of discontinued operations	$ 0	3,983
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents		3,930
Trade and other accounts receivable, net of allowance for doubtful accounts		8,931
Inventories		8,778
Prepaid expenses and other current assets		824
Current assets of discontinued operations		22,463
Property and equipment, net		8,084
Goodwill		21,354
Pension asset		11,712
Non-current assets of discontinued operations		41,150
Accounts payable and accrued liabilities		5,475
Accrued employee compensation		652
Deferred revenue and other current liabilities		97
Short-term borrowings and current portion of long-term debt		33
Current liabilities of discontinued operations		6,257
Deferred tax liability, long-term		3,774
Long-term debt, excluding current portion		82
Other long-term liabilities		127
Non-current liabilities of discontinued operations		$ 3,983