Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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+ Details

Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Trust's interest rate swap
Unrealized Gain on Settled Cap in Other Comprehensive Income	$ 42	$ (29)	$ 22
Cash Flow Hedging [Member] \| Interest rate caps [Member] \| 0.5% Strike Rate Derivatives [Member]
Trust's interest rate swap
Derivative Maturity Period	Aug. 14, 2013
Strike Rate	0.50%
Notional Amount of Hedge	13,408
Cost of Hedge	22
Estimated Fair Value of Cap in Other Comprehensive Income	(4)
Unrealized Gain on Settled Cap in Other Comprehensive Income
Change in Valuations Included in Other Comprehensive Income	$ (4)