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Derivative Instruments and Hedging Activities (Details) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended			12 Months Ended	3 Months Ended											3 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2014 Interest rate swaps [Member] Contract DerivativeContract	Mar. 31, 2014 Commodity contracts [Member]	Mar. 31, 2013 Commodity forward contract one [Member] USD ($)	Dec. 31, 2013 Commodity forward contract two [Member] USD ($)	Mar. 31, 2014 Commodity Forward Contract Three [Member] USD ($)	Mar. 31, 2014 Commodity forward contract Four [Member] USD ($)	Mar. 31, 2014 Commodity forward contract Five [Member] USD ($)	Mar. 31, 2013 Commodity Forward Contract Six [Member] USD ($)	Mar. 31, 2013 Commodity Forward Contract Seven [Member] USD ($)	Dec. 31, 2013 Interest rate swap one [Member] USD ($)	Dec. 31, 2011 Interest rate swap one [Member] USD ($)	Dec. 31, 2010 Interest rate swap one [Member] USD ($)	Dec. 31, 2013 Interest rate swap two [Member] USD ($)	Dec. 31, 2011 Interest rate swap two [Member] USD ($)	Dec. 31, 2010 Interest rate swap two [Member] USD ($)	Mar. 31, 2014 Foreign Currency Contract [Member] USD ($)	Mar. 31, 2014 Foreign Currency Contract [Member] GBP (£)	Dec. 31, 2013 Foreign Currency Contract [Member] USD ($)	Dec. 31, 2013 Foreign Currency Contract [Member] GBP (£)	Mar. 31, 2013 Foreign Currency Contract [Member] DerivativeContract	Mar. 31, 2014 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] USD ($)	Dec. 31, 2013 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] USD ($)	Mar. 31, 2014 Derivatives not designated as hedging instruments [Member] USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments [Member] USD ($)	Mar. 31, 2014 Derivatives not designated as hedging instruments [Member] Commodity contracts [Member] USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments [Member] Commodity contracts [Member] USD ($)	Mar. 31, 2014 Derivatives not designated as hedging instruments [Member] Foreign Currency Contract [Member] USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments [Member] Foreign Currency Contract [Member] USD ($)
Derivative [Line Items]
Maturity period of contracts, maximum (in months)					12 months														12 months	12 months
Number of outstanding contracts				4																			0
Derivative, notional amount						$ 3,472	$ 2,169	$ 2,169	$ 3,879	$ 3,014	$ 2,677	$ 2,636	$ 100,000	$ 200,000	$ 200,000	$ 100,000	$ 100,000	$ 100,000	$ 450	£ 3,000	$ 650	£ 4,000
Number of new contracts entered				4
Total gains or losses recognized	(326)	(292)
Derivative, fixed rate (in hundredths)													1.737%	1.905%	1.73%	1.742%	2.22%	1.025%
Net derivatives liability																								452	1,236	167	1,361	(255)	69	(30)	56
Fair value of derivative contracts excluding impact of credit risk	176		1,385
Outstanding commodity forward contracts [Abstract]
Trade Date						Oct. 29, 2012	Jun. 21, 2013	Jun. 21, 2013	Jan. 31, 2014	Mar. 11, 2014	Feb. 26, 2013	Mar. 01, 2013
Effective Date						Jan. 01, 2013	Oct. 01, 2013	Oct. 01, 2013	Feb. 01, 2014	Apr. 01, 2014	Mar. 01, 2013	Mar. 01, 2013
Notional Amount						$ 3,472	$ 2,169	$ 2,169	$ 3,879	$ 3,014	$ 2,677	$ 2,636	$ 100,000	$ 200,000	$ 200,000	$ 100,000	$ 100,000	$ 100,000	$ 450	£ 3,000	$ 650	£ 4,000
Termination Date						Sep. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013

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Fair value derivative contracts excluding impact of credit risk.

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Date the derivative contract become effective, in CCYY-MM-DD format.

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

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Fixed interest rate related to the interest rate derivative.

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High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Date the entity entered into the derivative contract, in CCYY-MM-DD format.

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Date the derivative contract matures, in CCYY-MM-DD format.

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The number of derivative instruments of a particular group held by the entity.

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