Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Capital assets and other	$ 0	$ 905
Net operating loss carry forwards	73,852	70,646
Interest deductions	16,797	8,911
Refinancing charge	669	2,926
Goodwill and intangibles	114,922	123,504
Stock compensation	1,736	2,101
Pension plan	4,414	3,872
Unrealized foreign exchange	11,373	14,645
Capital loss carry forwards	13,081	11,827
Accounting reserves	77,824	8,280
Gross deferred tax asset	314,668	247,617
Less: valuation allowance	(65,649)	(68,479)
Net deferred tax assets	249,019	179,138
Deferred tax liabilities:
Lease liabilities	(67,613)
Withholding taxes	(546)	0
Capital assets	(382)	0
Goodwill amortization	(98,677)	(91,726)
Total deferred tax liabilities	(167,218)	(91,726)
Deferred Tax Assets, Net	81,801	87,412
Disclosed as:
Deferred tax assets	85,988	92,741
Deferred tax liabilities	$ (4,187)	$ (5,329)