CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accumulated depreciation	$ 56,059	$ 58,117
Notes payable — credit facilities to affiliates	4,365,000	3,650,000
Accrued interest payable to affiliates	10,457	11,563
Accounts payable and accrued expenses to affiliates	$ 41,788	$ 39,772
Common stock , par value	$ 0.01	$ 0.01
Common stock , shares authorized	1,100,000,000	1,100,000,000
Common stock , shares issued	348,770,333	346,763,261
Common stock , shares outstanding	348,767,179	346,760,107