Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Common stock, shares outstanding	74,830,726	42,316,398
General partners' capital account, units outstanding	74,830,726	42,316,398
Limited Partners' Capital Account, Units Outstanding	4,227,384	1,731,672
Limited Partner [Member]
Redeemable stock, shares/units issued and outstanding	83,139	72,786
General partners' capital account, units outstanding	74,830,726	42,316,398
Limited Partners' Capital Account, Units Outstanding	4,227,384	1,731,672
Parent Company [Member]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	74,830,726	42,316,398
Common stock, shares outstanding	74,830,726	42,316,398
Redeemable stock, shares/units issued and outstanding	83,139	72,786