Short and Long-Term Debt - Long-Term Debt Additional Information (Detail)		12 Months Ended
	Jan. 22, 2016 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 11, 2015 USD ($)
Debt Instrument [Line Items]
Maturity obligation, year one		$ 26,700,000
Maturity obligation, year two		26,700,000
Maturity obligation, year three		321,500,000
Maturity obligation, year four		26,700,000
Maturity obligation, year 5		0
Maturity obligation, thereafter		74,200,000
Bank guarantees and letters of credit, outstanding		13,300,000
Restricted cash and cash equivalents		3,600,000	$ 1,200,000
Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average revolver interest rate	2.73%
Unused senior revolving credit facility		273,500,000
Line of credit, maximum borrowing capacity				$ 575,000,000.0
Bank guarantees and letters of credit, outstanding		6,600,000
Multi-currency Notes Due in 2031
Debt Instrument [Line Items]
Notes payable, principal amount	£ 54,900,000.0	74,200,000
Notes payable, annual repayment installments	£ 6,100,000.0	$ 8,200,000
Notes payable, interest rate		3.40%
Minimum fixed charges coverage ratio (not less than)		1.50
Consolidated leverage ratio (not to exceed)		3.25
Federal Funds Open Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Daily Libor Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Minimum | BASE or LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate		0.00%
Maximum | BASE or LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate		17500.00%