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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2014
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 28, 2014, we redeemed all 80,000 units of our Series H Preferred Units at a redemption price of $25.00 per unit plus $0.05833 per unit in accumulated and unpaid dividends on such units through October 28, 2014. Subsequent to September 30, 2014, we sold and settled approximately 1,019,892 shares of our common stock through our new ATM program for aggregate gross proceeds of $116.8 million ($115.4 million of net proceeds after related expenses). As of November 5, 2014, we had approximately $142.4 million of gross proceeds remaining available for issuance under the new ATM Program.