Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Income Taxes
Assets owned	$ 89,386,361	$ 85,698,354
Cash	404,820	368,815	$ 446,478	$ 255,187
Investment and Servicing Segment | TRS entities
Income Taxes
Assets owned	867,800	858,500
Cash	$ 72,400	$ 185,600