Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Derivative [Line Items]
Derivative, Notional Amount1	$ 11,084
DerivativeAssetFairValueGrossAsset	1,297
Derivative Asset, Fair Value, Gross Liability	1,297
Derivative, Gain (Loss) on Derivative, Net	0
Derivative, Interest Rate Swap, Pay Fixed, Receive Variable [Member]
Derivative [Line Items]
Derivative, Notional Amount1	5,542
DerivativeAssetFairValueGrossAsset	0
Derivative Asset, Fair Value, Gross Liability	1,297
Derivative, Gain (Loss) on Derivative, Net	28
Derivative, Interest Rate Swap, Pay Variable, Receive Fixed [Member]
Derivative [Line Items]
Derivative, Notional Amount1	5,542
DerivativeAssetFairValueGrossAsset	1,297
Derivative Asset, Fair Value, Gross Liability	0
Derivative, Gain (Loss) on Derivative, Net	$ (28)