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Derivatives and Hedging Activities (Details) (USD $)
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12 Months Ended | 0 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
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Jan. 07, 2008
Interest Rate Floor [Member]
Derivative_Instruments
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Dec. 31, 2011
Derivatives Not Designated as Hedging Instruments [Member]
Interest Rate Contracts [Member]
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Dec. 31, 2010
Derivatives Not Designated as Hedging Instruments [Member]
Interest Rate Contracts [Member]
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Dec. 31, 2011
Derivatives Not Designated as Hedging Instruments [Member]
Other Assets [Member]
Interest Rate Contracts [Member]
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Dec. 31, 2010
Derivatives Not Designated as Hedging Instruments [Member]
Other Assets [Member]
Interest Rate Contracts [Member]
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Dec. 31, 2011
Derivatives Not Designated as Hedging Instruments [Member]
Other Liabilities [Member]
Interest Rate Contracts [Member]
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Dec. 31, 2010
Derivatives Not Designated as Hedging Instruments [Member]
Other Liabilities [Member]
Interest Rate Contracts [Member]
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| Derivative [Line Items] | ||||||||
| Notional Amount of Interest Rate Derivative Instruments Not Designated as Hedging Instruments | $ 160,300,000 | $ 141,300,000 | ||||||
| Fair value of asset derivative instruments | 16,302,000 | 10,167,000 | ||||||
| Fair value of liability derivative instruments | 16,302,000 | 10,167,000 | ||||||
| Derivative, Number of Instruments Terminated | 3 | |||||||
| Proceeds from Termination of Derivative Instruments | 8,100,000 | |||||||
| Gain on Derivative Instruments, Pretax | 6,200,000 | |||||||
| Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | 143,000 | |||||||
| Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net | $ 0 |