Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Canadian federal tax benefit at statutory rates	$ (10,361)	$ (16,982)	$ (17,812)
Canadian Federal tax benefit at statutory rates, percent	15.00%	15.00%	15.00%
Canadian provincial income tax	$ (5,158)	$ (12,105)	$ (10,457)
Canadian provincial income tax, percent	7.50%	10.70%	8.80%
Effect of foreign income tax, net	$ 55	$ (1,756)	$ (6,797)
Effect of foreign income tax, net, percent	(0.10%)	1.60%	5.70%
Valuation allowance – Other	$ 2,257	$ (622)	$ 19,131
Valuation allowance - other, percent	(3.30%)	0.50%	(16.10%)
Enacted tax rate change - Canada	$ (2,452)	$ 0	$ 598
Enacted tax rate change - Canada, percent	3.50%	0.00%	(0.50%)
U.S tax reform rate change	$ 0	$ 0	$ 9,047
U.S tax reform rate change, percent	0.00%	0.00%	(7.60%)
Valuation allowance - U.S. tax reform	$ 0	$ 0	$ (9,047)
Valuation allowance - U.S. tax reform, percent	0.00%	0.00%	7.60%
Goodwill impairment	$ 4,689	$ 0	$ 0
Goodwill impairment, percent	(6.80%)	0.00%	0.00%
Nondeductible compensation	$ 1,203	$ 181	$ 0
Nondeductible compensation - percent	(1.70%)	(0.20%)	0.00%
Intercompany unrealized foreign currency translation	$ (1,451)	$ 0	$ 0
Intercompany unrealized foreign currency translation, percent	2.10%	0.00%	0.00%
Other, net	$ 477	$ (81)	$ 1,847
Other, net, percent	(0.70%)	0.10%	(1.50%)
Net income tax benefit	$ (10,741)	$ (31,365)	$ (13,490)
Net income tax benefit, percent	15.50%	27.70%	11.40%