CORPORATE LOANS (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Summary of corporate loans
Par	$ 5,275,132	$ 5,722,646
Amortized Cost	5,164,654	5,619,815
Estimated Fair Value	4,783,419	5,188,610
Corporate loans, at estimated fair value
Summary of corporate loans
Par	5,275,132	5,722,646
Amortized Cost	5,164,654	5,619,815
Estimated Fair Value	$ 4,783,419	$ 5,188,610