Share-Based and Other Deferred Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Acquisition-Related

Summary of Activity Related to Share-Based Payment Awards

The following table summarizes activity related to Acquisition-related Awards during the year ended December 31, 2012:

	Acquisition-related Awards
	Number of Shares			Grant Date Weighted Average Fair Value
Unvested Balance at January 1, 2012		1,911		$	43,537
Granted		54			1,421
Modified		—			—
Forfeited		—			—
Vested		(246	)		(5,620	)
Unvested Balance at December 31, 2012		1,719		$	39,338

Equity Grants

Summary of Activity Related to Share-Based Payment Awards

The following table summarizes activity related to Service-based Awards, which includes RSUs as well as LP Units, during the year ended December 31, 2012:

	Service-based Awards
	Number of Shares			Grant Date Weighted Average Fair Value
Unvested Balance at January 1, 2012		8,351		$	188,051
Granted		3,312			94,059
Modified		—			—
Forfeited		(393	)		(8,939	)
Vested		(3,298	)		(76,303	)
Unvested Balance at December 31, 2012		7,972		$	196,868