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
9 Months Ended
Sep. 30, 2012
Derivative [Line Items]  
Deferred net gains on derivatives accumulated in other comprehensive income expected reclassification to net income in next twelve months $ 3,575
Maximum [Member]
 
Derivative [Line Items]  
Derivatives remaining maturity 1 year
Aggregate unrealized gain of derivative contracts with single counterparty $ 2,000