Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments And Risk Management (Narrative) (Details)

v2.4.0.6
Financial Instruments And Risk Management (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Derivative [Line Items]  
Deferred net losses on derivatives accumulated in other comprehensive income expected reclassification to net income in next twelve months $ 7,120
Maximum [Member]
 
Derivative [Line Items]  
Derivatives remaining maturity 1 year
Aggregate unrealized gain of derivative contracts with single counterparty $ 3,000