Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stockholders' Equity

	Nine Months Ended September 30,
	2011		2010
Series C preferred stock(1):
Dividends	$	5,089	$	5,089
Per share		1.3828		1.3828
Common stock:
Dividends		96,915		93,762
Per share		1.145		1.130

⁽¹⁾ The Series C preferred stock has no maturity date and will remain outstanding unless redeemed.

DRIP [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stockholders' Equity

	Nine Months Ended September 30,
	2011		2010
Shares of common stock issued		2,423,611		663,741
Net proceeds	$	59,707	$	14,159