Long-Term Debt - Credit Facility Agreements (Detail) € in Millions, $ in Millions	3 Months Ended					12 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 CAD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2019 CAD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CAD ($)	Dec. 31, 2018 USD ($)	Mar. 24, 2017 CAD ($)	Mar. 24, 2017 USD ($)
Debt Instrument [Line Items]
Long-term debt, due in the next twelve months										$ 27,877,000
Debt, Long-term and Short-term, Combined Amount										2,258,873,000		$ 2,317,723,000
Repayments of long-term debt							$ 359,432,000	$ 286,200,000	$ 755,037,000
Letters Of Credit Facing Fee							$ 500
Letters Of Credit Facing Fee Percentage						0.25%	0.25%
Loss on early extinguishment of debt	$ 1,700,000	$ 2,500,000					$ 1,676,000	2,493,000	$ 7,052,000
Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount										795,830,000		951,800,000
Term Loans And Revolving Loans Maintained as Eurodollar Rate, Euro Rate or CDOR Rate Loans [Member]
Debt Instrument [Line Items]
Line of credit facility, margin						1.25%	1.25%
Term Loans and Revolving Loans Maintained as Base Rate or Canadian Prime Rate Loans [Member]
Debt Instrument [Line Items]
Line of credit facility, margin						0.25%	0.25%
Other Foreign Bank Revolving And Term Loans [Member]
Debt Instrument [Line Items]
Long-term debt, due in the next twelve months										27,900,000
Repayments of Debt | €			€ 34.0
Other Foreign Bank Revolving And Term Loans [Member] | Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount										31,127,000		129,697,000
Finance Leases [Member]
Debt Instrument [Line Items]
Long-term debt, due in the next twelve months										1,900,000
Revolving Loan - Letters of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity										$ 125,000,000
Multicurrency Revolving Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity														$ 1,190,000,000
US Term Loan [Member]
Debt Instrument [Line Items]
Repayments of Debt					$ 98,000,000.0
Line of Credit Facility, Interest Rate at Period End						3.05%				3.05%
U.S. term loans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity														$ 800,000,000.0
Repayments of Debt							$ 40,000,000.0
U.S. term loans [Member] | Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount										$ 760,000,000		800,000,000
Canadian Term Loans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity													$ 45.5
Repayments of Debt				$ 14.0		$ 24.0
Line of Credit Facility, Interest Rate at Period End						3.33%				3.33%
Canadian Term Loans [Member] | Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount						$ 6.1				$ 4,703,000	$ 30.1	22,103,000
Multicurrency Incremental Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity										1,250,000,000
Term Loan [Member] | Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount										$ 764,700,000		$ 822,100,000
Euro Term Loans [Member]
Debt Instrument [Line Items]
Repayments of Debt | €			€ 187.0
Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate						3.60%			3.10%	3.60%	3.60%	3.60%
2018 Amendment to the Credit Agreement [Member]
Debt Instrument [Line Items]
Loss on early extinguishment of debt								$ 1,100,000
Revolving Loan [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate						3.50%			3.00%	3.50%	3.50%	3.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.25%	0.25%
Revolving Loan [Member] | Bank Borrowings [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount										$ 0		$ 0
Canadian Revolving Loans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity													$ 15.0
Revolving And Term Loans [Member]
Debt Instrument [Line Items]
Loss on early extinguishment of debt									$ 600,000
Maximum [Member] | Revolving Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.30%	0.30%
Minimum [Member] | Multicurrency Incremental Loan Facility [Member]
Debt Instrument [Line Items]
Additional borrowing capacity										$ 50,000,000
Minimum [Member] | Revolving Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.20%	0.20%