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) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax $ 0 $ 0 $ (30) $ 0
Interest Rate Contract [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net     0 0
Derivative gain (loss) recognized in income (ineffective portion and amount excluded from Effectiveness Testing)     (167) 0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative gain (loss) in Other Comprehensive Income 0 0 21,297 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 0 0 0 0
Derivative gain (loss) recognized in income (ineffective portion and amount excluded from Effectiveness Testing) (5,806) 0 (5,806) 0
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax 0 0 (30) 0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 101,263 $ 0 $ 83,279 $ 0