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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Capital assets and other | $ 20,831 | $ 10,987
Net operating loss carry forwards | 47,139 | 60,705
Interest deductions | 20,819 | 16,797
Refinancing charge | 0 | 669
Goodwill and intangibles | 122,045 | 117,421
Stock compensation | 1,693 | 1,736
Pension plan | 4,856 | 4,414
Unrealized foreign exchange | 11,995 | 11,373
Capital loss carry forwards | 13,657 | 13,081
Accounting reserves | 77,870 | 76,397
Gross deferred tax asset | 320,905 | 313,580
Less: valuation allowance | (198,452) | (65,649)
Net deferred tax assets | 122,453 | 247,931
Deferred tax liabilities: |  |
Right-of-use assets | (57,890) | (67,613)
Refinancing charge | (1,675) | 0
Withholding taxes | (475) | (546)
Capital assets | (1,893) | (382)
Goodwill amortization | (88,326) | (98,677)
Total deferred tax liabilities | (150,259) | (167,218)
Net deferred tax asset (liability) | (27,806) |
Net deferred tax asset (liability) |  | 80,713
Disclosed as: |  |
Deferred tax assets | 179 | 84,900
Deferred tax liabilities | $ (27,985) | $ (4,187)

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from deferred acquisition consideration, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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