Summary of Significant Accounting Policies - Derivative Instruments (Details) (USD $)
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Jan. 11, 2012
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Dec. 31, 2013
Interest Rate Cap [Member]
instrument
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Dec. 31, 2013
Interest Rate Swap [Member]
instrument
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Dec. 31, 2013
Designated as Hedging Instrument [Member]
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Dec. 31, 2012
Designated as Hedging Instrument [Member]
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Dec. 31, 2013
Designated as Hedging Instrument [Member]
Interest rate contracts [Member]
Interest rate products [Member]
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Dec. 31, 2012
Designated as Hedging Instrument [Member]
Interest rate contracts [Member]
Interest rate products [Member]
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Derivative [Line Items] | |||||||
Number of Instruments | 2 | 1 | |||||
Derivative, Notional Amount | $ 42,000,000 | $ 97,000,000 | $ 64,500,000 | ||||
Asset Derivatives | 192,000 | 71,000 | 192,000 | 71,000 | |||
Liability Derivative | $ 0 | $ 0 | $ 0 | $ 0 |