Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements

The following table provides the assets carried at fair value (in thousands):

			Fair Value Measurements Using:
	Total Carrying Value		Quoted Market Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of December 31, 2012
Cash equivalents(1)	$	1,377,330	$	1,377,330	$	—	$	—
Interest rate caps(2)	$	218	$	—	$	218	$	—
As of December 31, 2011
Cash equivalents(1)	$	2,766,796	$	2,766,796	$	—	$	—
Interest rate caps(2)	$	1,195	$	—	$	1,195	$	—

(1) The Company has short-term investments classified as cash equivalents as the original maturities are less than 90 days.

(2) As of December 31, 2012 and 2011, the Company has 30 and 38 interest rate cap agreements, respectively, with an aggregate fair value of approximately $0.2 million and $1.2 million, respectively, based on quoted market values from the institutions holding the agreements.