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Financial Instruments Financial Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details)

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Financial Instruments Financial Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) (Interest Rate Contract [Member], USD $)
3 Months Ended
Mar. 31, 2014
Effective Date August 14, 2012 [Domain]
 
Derivative [Line Items]  
Derivative, Inception Date Aug. 14, 2012
Derivative, Maturity Date Jul. 31, 2019
Debt Instrument, Description of Variable Rate Basis One-month LIBOR
Notional Amount of Interest Rate Derivatives $ 20.0
Derivative, Average Fixed Interest Rate 1.98%
Effective Date June 5, 2013 [Domain]
 
Derivative [Line Items]  
Derivative, Inception Date Jun. 05, 2013
Derivative, Maturity Date May 28, 2020
Debt Instrument, Description of Variable Rate Basis One-month LIBOR
Notional Amount of Interest Rate Derivatives 0
Derivative, Average Fixed Interest Rate 2.05%
Maximum [Member] | Effective Date August 14, 2012 [Domain]
 
Derivative [Line Items]  
Notional Amount of Interest Rate Derivatives 2.9
Maximum [Member] | Effective Date June 5, 2013 [Domain]
 
Derivative [Line Items]  
Notional Amount of Interest Rate Derivatives $ 671.0