Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Noncontrolling Interests.
Net earnings attributable to noncontrolling interests	$ 62,494	$ 136,634	$ 155,315
Distributions paid to noncontrolling interests	58,986	138,041	124,853
Capital contributions by noncontrolling interests	$ 5,254	$ 3,336	$ 1,697