Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Data [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Three Months Ended
	December 31, 2016			September 30, 2016		June 30, 2016		March 31, 2016
Total revenues	$	66,492		$	53,638	$	21,047	$	103,124
Net income attributable to noncontrolling interests	$	(10,336	)	$	13,907	$	4,148	$	55,887
Net income per basic share	$	(0.06	)	$	0.08	$	0.03	$	0.34
Net income per diluted share	$	(0.06	)	$	0.08	$	0.03	$	0.34

	Three Months Ended
	December 31, 2015		September 30, 2015		June 30, 2015		March 31, 2015
Total revenues	$	178,058	$	124,618	$	138,066	$	149,706
Net income attributable to noncontrolling interests	$	100,574	$	69,459	$	78,264	$	84,498
Net income per basic share	$	0.61	$	0.42	$	0.48	$	0.52
Net income per diluted share	$	0.61	$	0.42	$	0.47	$	0.50