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Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Subordinated debentures	$ 15,465	$ 15,465
Interest Rate Swap [Member]
Derivative [Line Items]
Subordinated debentures	$ 5,000

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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