Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount	$ 0	$ 0	$ 16,500,000
Effective Income Tax Rate Reconciliation, Percent	29.80%	28.20%	17.90%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 0	$ 0	$ 9,400,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent		30.10%	28.40%
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	0	$ 0	$ 1,400,000
Provision for Income Taxes, Equity Method Investment	(33,600,000)	(18,000,000.0)	(10,800,000)
Amount of U.S. federal tax net operating loss	0.80
Alternative minimum tax credit	0	1,700,000
State net operating loss	38,300,000	31,100,000
State net operating loss carryforwards valuation allowance	13,900,000	12,900,000
Foreign net operating loss	2,100,000	2,200,000
Tax Cuts and Jobs Act of 2017, transition tax for accumulated roreign earnings, income tax expense (benefit)			23,100,000
Canada Revenue Agency [Member]
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	(700,000)	$ (2,800,000)	$ 0
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	2,100,000
Foreign Tax Authority | United Kingdom tax authority
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 12,300,000