Derivative Financial Instruments (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Apr. 01, 2016
Derivative [Line Items]
Interest expense	$ 9,100,000	$ 9,000,000		$ 27,500,000	$ 43,400,000
Derivative assets	6,900,000			6,900,000		$ 10,000,000
Derivative liabilities	1,500,000			1,500,000		500,000
Losses in AOCI expected to be recognized in earnings over the next twelve months				1,500,000
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivative assets	0			0		0
Derivative liabilities	0			$ 0		0
Gain (loss) recognized in income for derivative instruments	0	0
Commodity Price Risk [Member]
Derivative [Line Items]
Maximum length of time hedged in cash flow hedge				24 months
Notional amount	10,900,000			$ 10,900,000		7,400,000
Foreign Exchange Contracts, Sales and Purchases [Member]
Derivative [Line Items]
Maximum length of time hedged in cash flow hedge				15 months
Notional amount	31,300,000			$ 31,300,000		$ 34,600,000
Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Gain (loss) recognized on hedge ineffective portion	$ 0	$ 0		$ 0	$ 0
Interest Rate Swap Contracts [Member] | Term Loan B Swaps Settled [Member]
Derivative [Line Items]
Notional amount							$ 450,000,000
Interest Rate Swap Contracts [Member] | Term Loan B [Member]
Derivative [Line Items]
Trade date				Apr. 01, 2016
Interest Rate Swap Contracts [Member] | Term Loan B [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Interest expense			$ 10,700,000
Interest Rate Swap Contracts [Member] | Term Loan B [Member] | Minimum [Member]
Derivative [Line Items]
LIBOR floor							0.75%