Debt (Details) € in Thousands, $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 AUD ($)	Dec. 31, 2019 EUR (€)	Sep. 29, 2017 USD ($)	Sep. 28, 2017 USD ($)
Current portion [Abstract]
Short-term borrowings	$ 1,647	$ 0
Short-term borrowings and current portion of long-term debt	11,745	9,168
Long-term portion [Abstract]
Long-term debt, net	499,662	657,593
Debt
Standby Letters of Credit	4,800
Loss on Cash Flow Hedge Ineffectiveness	$ 500
Gain on Cash Flow Hedge Ineffectiveness		1,200	$ 2,400
Average total leverage ratio, dividend declarations	300.00%			300.00%	300.00%
Maximum average total leverage ratio, share repurchases	250.00%			250.00%	250.00%
Deferred financing costs [Abstract]
Balance at beginning of year	$ 4,712	4,606
Financing costs deferred	406	106	1,104
Balance at end of year	5,118	4,712	$ 4,606
Less: Accumulated amortization	(4,107)	(3,674)
Deferred financing costs, net of accumulated amortization	$ 1,011	1,038
Financial and other covenants [Abstract]
Financial covenants, dividend limitation as percent of preceding year's net income, maximum (in hundredths)	50.00%
Debt, Long-term and Short-term, Combined Amount	$ 511,407	666,761
London Interbank Offered Rate (LIBOR) [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	1.00%
Debt Instrument, Interest Rate Margins on Variable Rates, Minimum	1.025%
Debt Instrument, Interest Rate Margins on Variable Rate, Maximum	1.425%
Base Rate [Member]
Debt
Debt Instrument, Interest Rate Margins on Variable Rates, Minimum	0.025%
Debt Instrument, Interest Rate Margins on Variable Rate, Maximum	0.425%
Canadian Dealer Offered Rate [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	1.00%
Federal Funds Rate [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	0.50%
Commercial Paper [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	0.75%
Unsecured Syndicated Senior Credit Facility [Member]
Long-term portion [Abstract]
Long-term Line of Credit, Noncurrent	$ 200,673	550,131
Debt
Line of Credit, maximum borrowing capacity						$ 750,000	$ 465,000
Line of credit facility, term (in years)	five
Line of Credit, Accordian Feature Increase in borrowing capacity	$ 75,000
Line of Credit Facility, Maximum Capacity Including Accordian	825,000
Line of Credit Facility, Amount Outstanding	200,700
Line of credit facility, remaining borrowing capacity	$ 544,500
Weighted average effective interest rate (in hundredths)	2.80%			2.80%	2.80%
Annual facility fee, minimum (in hundredths)	0.10%
Annual facility fee, maximum (in hundredths)	0.20%
Long-term Line of Credit, Noncurrent	$ 200,673	550,131
Term Facility
Long-term portion [Abstract]
Long-term Line of Credit, Noncurrent	185,000
Debt
Line of Credit, maximum borrowing capacity	$ 185,000
Weighted average effective interest rate (in hundredths)	2.50%			2.50%	2.50%
Long-term Line of Credit, Noncurrent	$ 185,000
Term Facility Quarterly Principal Payment	1.25%			1.25%	1.25%
Term Facility Total of Quarterly Principal Payments	33.75%			33.75%	33.75%
Term Facility Final Principal Payment	66.25%			66.25%	66.25%
Term Facility | Base Rate [Member]
Debt
Debt Instrument, Interest Rate Margins on Variable Rates, Minimum	0.125%
Debt Instrument, Interest Rate Margins on Variable Rate, Maximum	0.625%
Term Facility | Eurodollar [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	1.00%
Debt Instrument, Interest Rate Margins on Variable Rates, Minimum	1.125%
Debt Instrument, Interest Rate Margins on Variable Rate, Maximum	1.625%
Term Facility | Prime Rate [Member]
Debt
Debt Instrument, Basis Spread on Variable Rate	0.50%
Receivables Securitization Facility [Member]
Long-term portion [Abstract]
Receivable Securitization Facility	$ 115,000	108,500
Debt
Receivables Facility, Borrowing Capacity Peak Seasonal Maximum	295,000
Receivables Facility, Borrowing Capacity NonSeasonal Minimum	120,000
Receivables Facility, Borrowing Capacity NonSeasonal Maximum	$ 275,000
Receivables Facility, Term (in years)	2 years
Receivable Securitization Facility	$ 115,000	108,500
Weighted average effective interest rate	2.60%			2.60%	2.60%
Receivables facility, unused fee	0.35%
Australian Seasonal Credit Facility [Member]
Current portion [Abstract]
Australian credit facility	$ 10,098	$ 9,168
Debt
Line of Credit, maximum borrowing capacity				$ 20,000
Bank Overdrafts [Member]
Debt
Borrowing Capacity, Bank Overdraft Facility (in Euros) | €					€ 12,000
Forward-starting Interest Rate Swap 1 [Member]
Interest rate swap agreement, fixed interest rate	2.0925%			2.0925%	2.0925%
Derivative
Derivative, Notional Amount	$ 75,000
Interest rate swap agreement, fixed interest rate	2.0925%			2.0925%	2.0925%
Forward-starting Interest Rate Swap 2 [Member]
Interest rate swap agreement, fixed interest rate	1.55%			1.55%	1.55%
Derivative
Derivative, Notional Amount	$ 75,000
Interest rate swap agreement, fixed interest rate	1.55%			1.55%	1.55%