Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Aggregate Notional Amount and Estimated Net Fair Value of Derivative Instruments

The following table summarizes the aggregate notional amount and estimated net fair value of our derivative instruments as of June 30, 2013 and December 31, 2012:

	As of June 30, 2013					As of December 31, 2012
	Notional		Fair Value			Notional		Fair Value
Cash flow hedges:
Interest rate swaps	$	1,087,770	$	(122,936	)	$	1,110,720	$	(151,358	)
Interest rate caps		36,000		1,006			36,000		1,053
Net fair value	$	1,123,770	$	(121,930	)	$	1,146,720	$	(150,305	)