Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Interest Rate Derivatives Market Adjustments (Details)

v2.4.0.8
Financial Instruments - Interest Rate Derivatives Market Adjustments (Details) (Interest Rate Contract [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Designated as Hedging Instrument [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net $ 0 $ 0 $ 21,297 $ 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 0 0 0 0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net (5,806) 0 (5,806) 0
Gain (Loss) on Settlement of Derivative Instrument [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net 0 0 (30) 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 0 0 0 0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net $ (167) $ 0 $ (167) $ 0