Net Gain on Change in Controls of Interests (Details 3) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues				$ 496,841,000	$ 479,174,000
Pro forma revenues				540,583,000	525,262,000
Earnings (loss) from continuing operations		$ 303,076,000	$ (98,985,000)	246,072,000	(96,408,000)
Pro forma earnings (loss) from continuing operations				(52,967,000)	170,025,000
Net earnings (loss) attributable to common shareholders				249,547,000	(77,472,000)
Pro forma net earnings (loss) attributable to common shareholders				$ (49,492,000)	$ 188,961,000
Weighted average shares outstanding, Basic		233,377,771	198,341,355	218,254,445	198,041,879
Pro forma weighted average shares outstanding, Basic				218,254,445	198,041,879
Net earnings (loss) attributable to common shareholders, Basic		$ 1.27	$ (0.47)	$ 1.12	$ (0.39)
Pro forma net earnings (loss) attributable to common shareholders, Basic				$ (0.23)	$ 0.93
Weighted average shares outstanding, Diluted	[1]	253,992,156	198,341,355	238,572,041	198,041,879
Pro forma weighted average shares outstanding, Diluted				218,254,445	229,699,514
Net earnings (loss) attributable to common shareholders, Diluted		$ 1.18	$ (0.47)	$ 1.04	$ (0.39)
Pro forma net earnings (loss) attributable to common shareholders, Diluted				$ (0.23)	$ 0.86
Net Gain on Change in Control of Interests [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma adjustment to revenues	[2]			$ 0	$ 0
Pro forma adjustment to earnings (loss) from continuing operations	[2]			(283,828,000)	283,828,000
Pro forma adjustment to net earnings (loss) attributable to common shareholders	[2]			(283,828,000)	283,828,000
Other Pro Forma Adjustments [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma adjustment to revenues	[3]			43,742,000	46,088,000
Pro forma adjustment to earnings (loss) from continuing operations	[3]			(15,211,000)	(17,395,000)
Pro forma adjustment to net earnings (loss) attributable to common shareholders	[3]			$ (15,211,000)	$ (17,395,000)

[1] Incremental shares from restricted stock and Class A common units of 3,908,518 and 4,110,705, for the three and six months ended June 30, 2015, respectively, were not included in the computation of diluted EPS because their effect is anti-dilutive. Incremental shares from convertible securities of 4,720,604 for the six months ended June 30, 2015 were not included in the computation of diluted EPS because their effect is anti-dilutive. Incremental shares from dilutive options, restricted stock, performance shares and convertible securities aggregating 37,140,789 and 37,425,371 for the three and six months ended June 30, 2014, respectively, were not included in the computation of EPS because their effect is anti-dilutive due to the loss from continuing operations. Weighted-average options, restricted stock and performance shares of 1,803,486 and 2,123,933 for the three and six months ended June 30, 2015, respectively, and 3,974,932 and 3,585,274 for the three and six months ended June 30, 2014, respectively, were not included in the computation of diluted EPS because their effect is anti-dilutive under the treasury stock method.

[2] Gain on change in control of interests of $463,643, net of tax of $179,815.

[3] Represents additional depreciation and amortization expense related to the increased basis of real estate and intangible assets, plus pro forma earnings of the 100% ownership interests, less actual equity in earnings related to the Company’s 51% prior ownership for the periods presented.