Divestiture - Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Current assets held for sale	$ 0	$ 21,373
Non-current assets held for sale	0	28,045
Liabilities
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	4,616
Non-current liabilities held for sale	$ 0	6,989
Seeger Orbis GmbH &Co. OHG and Seeger-Orbis Mechanical Components (Tianjin) Co., Ltd. [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Assets
Accounts receivable, less allowance of $152		6,844
Inventories		13,727
Prepaid expenses and other current assets		802
Current assets held for sale		21,373
Property, plant and equipment, net		17,701
Other intangible assets, net		590
Goodwill		9,400
Other assets		354
Non-current assets held for sale		28,045
Liabilities
Accounts payable		2,961
Accrued liabilities		1,655
Disposal Group, Including Discontinued Operation, Liabilities, Current		4,616
Accrued retirement benefits		5,788
Other liabilities		1,201
Non-current liabilities held for sale		6,989
Accounts receivable, allowance		$ 152