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Derivative Financial Instruments (Narrative)(Details) (USD $)
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9 Months Ended | |||
|---|---|---|---|---|
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Sep. 30, 2012
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Dec. 31, 2011
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Jul. 31, 2009
Cash Flow Hedge [Member]
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Sep. 30, 2012
Derivative Matured [Member]
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| Derivative [Line Items] | ||||
| Interest rate swap notional amount | $ 15,000,000 | $ 20,000,000 | $ 5,000,000 | |
| Number of interest rate swap contracts | 3 | |||
| Derivative, Maturity Date | Jun. 15, 2012 | |||
| Interest rate swap fair value | (946,000) | (1,000,000) | ||
| Cash collateral | 1,400,000 | |||
| Gain on derivative | 8,000 | |||
| Deferred tax asset on gain on derivative | $ 36,000 | |||
| Cash flow hedge ineffectiveness | 0 |