Financing Arrangements (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended
	Apr. 12, 2018	Dec. 11, 2017	Mar. 29, 2020	Mar. 31, 2019	Mar. 20, 2020	Dec. 31, 2019	Jul. 12, 2019
Derivative [Line Items]
Derivative asset			$ 3,768
Derivative liabilities			12,310
Long Term Debt, Difference Between Carrying Value And Fair Value			131,800
Long-term Debt			602,300
Restricted Cash			1,100			$ 1,200
Accounts Receivable, Purchase			14,500
Proceeds from Sale and Collection of Receivables			13,600
Accounts Receivable, Sale, Outstanding Purchase Price			800
Interest Expense			9,011	$ 13,094
Repayments of Long-term Debt			180,891	140,500
Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge derivative instrument assets at fair value			(8,500)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax			(1,093)
Derivative, Loss on Derivative			1,100
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net			6,200
Interest Expense			6,000
Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Notional Amount							$ 100,000
Derivative, fixed interest rate							2.40%
Other Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge derivative instrument assets at fair value			6,000
Accrued Expenses and Other Current Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge derivative instrument assets at fair value			6,300
Other Current Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge derivative instrument assets at fair value			3,800
Deferred Tax Asset [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge derivative instrument assets at fair value			2,800
Cash Flow Hedging [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax			$ (4,105)
Minimum [Member]
Derivative [Line Items]
Accounts Receivable, Sale, Percent			90.00%
Maximum [Member]
Derivative [Line Items]
Accounts Receivable, Sale, Percent			100.00%
Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Long-term Debt, Fair Value			$ 496,100
Term Loan [Member]
Derivative [Line Items]
Long-term Debt, Gross			589,000			636,300
Unamortized Debt Issuance Expense			13,300			$ 17,600
Debt Instrument, Periodic Payment, Interest			8,800	$ 12,400
Repayments of Long-term Debt			$ 161,800
Long-term Line of Credit					$ 80,000
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.00%
Amortization of Debt Issuance Costs			$ 3,200
New Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.50%
New Credit Agreement [Member] | Base Rate [Member]
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.25%
Citizen Bank, National Association [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount			$ 400,000
Derivative, Variable Interest Rate			2.6475%
Derivative, fixed interest rate			6.1475%