Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Loss before income taxes for the U.S. jurisdictions	$ 499,900,000	$ 343,100,000	$ 312,900,000
Loss before income taxes for non-U.S. jurisdictions	$ 30,500,000	$ 24,300,000	$ 14,900,000
Increase in effective tax rate due to goodwill impairment charges	7.20%
Effective income tax rate	19.70%	12.50%	101.80%
Decrease in effective tax rate of goodwill impairment	0.70%	6.90%
Decrease in effective tax rate of valuation allowances	0.80%	3.70%
Valuation allowances against net deferred tax assets	$ 17,231,000	$ 13,232,000
Gross federal net operating losses	1,400,000,000
Gross Canadian net operating losses	47,400,000
Post-apportionment state net operating losses	847,000,000
Unrecognized tax benefits	0
Canada
Income Taxes [Line Items]
Valuation allowances against net deferred tax assets	$ 4,000,000
Net operating loss carryforwards expiration, beginning year	2036
Net operating loss carryforwards expiration, ending year	2039
Tax periods open for examination	Tax years ended December 31, 2012 through December 31, 2018
Canada | Earliest Tax Year
Income Taxes [Line Items]
Tax period open for examination	2012
Canada | Latest Tax Year
Income Taxes [Line Items]
Tax period open for examination	2018
U.S.
Income Taxes [Line Items]
Net operating loss carryforwards expiration, beginning year	2034
Net operating loss carryforwards expiration, ending year	2037
Tax periods open for examination	Tax years ended December 31, 2014 through December 31, 2018
U.S. | Earliest Tax Year
Income Taxes [Line Items]
Tax period open for examination	2014
U.S. | Latest Tax Year
Income Taxes [Line Items]
Tax period open for examination	2018
State Jurisdictions
Income Taxes [Line Items]
Net operating loss carryforwards expiration, beginning year	2023
Net operating loss carryforwards expiration, ending year	2039