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Discontinued Operations - Assets and Liabilities of the Disposal Group (Details) - Grass Valley - Discontinued Operations, Held-for-sale - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Cash and cash equivalents | $ 18,405 | $ 13,156
Receivables, net | 117,386 | 129,983
Disposal Group, Including Discontinued Operation, Inventory | 55,002 | 51,416
Other current assets | 35,187 | 25,167
Property, plant and equipment, less accumulated depreciation | 61,233 | 55,010
Operating lease right-of-use assets | 16,902 |
Goodwill | 26,707 | 350,777
Intangible assets, less accumulated amortization | 143,459 | 151,162
Deferred income taxes | 57,469 | 29,559
Other long-lived assets | 21,652 | 16,613
Impairment of disposal group | (180,358) | 0
Total Assets of discontinued operations | 373,044 | 822,843
Liabilities: |  |
Accounts payable | 52,425 | 55,148
Accrued liabilities | 83,349 | 91,880
Postretirement benefits | 6,224 | 5,043
Deferred income taxes | 2,740 | 3,834
Long-term operating lease liabilities | 20,459 |
Other long-term liabilities | 5,082 | 8,737
Total liabilities of discontinued operations | $ 170,279 | $ 164,642

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