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Derivative Financial Instruments (Details) (Derivatives Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value of Derivative Instruments
Asset Derivatives	$ 24,663	$ 20,497
Liability Derivatives	24,663	20,497
Interest Rate Swaps [Member] \| Other Assets [Member]
Fair Value of Derivative Instruments
Asset Derivatives	24,663	20,497
Interest Rate Swaps [Member] \| Other Liabilities [Member]
Fair Value of Derivative Instruments
Liability Derivatives	$ 24,663	$ 20,497

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details