FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($) $ / barrel	Dec. 31, 2014 USD ($) $ / shares $ / barrel
Successor Company | Minimum
Valuation techniques used for assets, measured at fair value
Weight ascribed to each valuation technique	0.00%	0.00%
Successor Company | Maximum
Valuation techniques used for assets, measured at fair value
Weight ascribed to each valuation technique	100.00%	100.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Liabilities, fair value (in dollars)		$ 5,501,099
Successor Company | Significant Unobservable Inputs (Level 3) | Corporate Debt Securities
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 208,116	317,034
Successor Company | Significant Unobservable Inputs (Level 3) | Residential Mortgage- Backed Securities
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	50,139	55,184
Successor Company | Significant Unobservable Inputs (Level 3) | Corporate loans, at estimated fair value
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	331,626	347,077
Successor Company | Significant Unobservable Inputs (Level 3) | Equity Investments, at Estimated Fair Value
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 158,877	$ 81,719
Successor Company | Significant Unobservable Inputs (Level 3) | Equity Investments, at Estimated Fair Value | Minimum
Valuation techniques used for assets, measured at fair value
Illiquidity discount	5.00%	5.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Interests in Joint Ventures and Partnerships
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 655,655	$ 718,772
Successor Company | Significant Unobservable Inputs (Level 3) | Options
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 481	$ 5,212
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Weighted Average | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Discount margin		2.55%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Minimum | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Discount margin		0.95%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Maximum | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Discount margin		10.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate Debt Securities | Weighted Average
Valuation techniques used for assets, measured at fair value
Yield	19.00%	17.00%
Net leverage	7	6
EBITDA multiple	6	7
Discount margin	8.45%	9.05%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate Debt Securities | Minimum
Valuation techniques used for assets, measured at fair value
Yield	6.00%	3.00%
Net leverage	6	5
EBITDA multiple	5	4
Discount margin	7.50%	6.25%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate Debt Securities | Maximum
Valuation techniques used for assets, measured at fair value
Yield	23.00%	19.00%
Net leverage	12	12
EBITDA multiple	10	11
Discount margin	14.25%	11.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate loans, at estimated fair value | Weighted Average
Valuation techniques used for assets, measured at fair value
Yield	12.00%	12.00%
Net leverage	6	6
EBITDA multiple	8	9
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate loans, at estimated fair value | Minimum
Valuation techniques used for assets, measured at fair value
Yield	3.00%	3.00%
Net leverage	1	1
EBITDA multiple	4	5
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Corporate loans, at estimated fair value | Maximum
Valuation techniques used for assets, measured at fair value
Yield	20.00%	21.00%
Net leverage	22	13
EBITDA multiple	17	12
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Interests in Joint Ventures and Partnerships
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 18,400
Yield	16.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Interests in Joint Ventures and Partnerships | Weighted Average
Valuation techniques used for assets, measured at fair value
Yield	16.00%
Net leverage	5
EBITDA multiple	10
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Interests in Joint Ventures and Partnerships | Minimum
Valuation techniques used for assets, measured at fair value
Net leverage	1
EBITDA multiple	8
Successor Company | Significant Unobservable Inputs (Level 3) | Yield analysis | Interests in Joint Ventures and Partnerships | Maximum
Valuation techniques used for assets, measured at fair value
Net leverage	13
EBITDA multiple	13
Successor Company | Significant Unobservable Inputs (Level 3) | Broker quotes | Corporate Debt Securities
Valuation techniques used for assets, measured at fair value
Offered quotes (in dollars per share) | $ / shares		$ 101
Successor Company | Significant Unobservable Inputs (Level 3) | Broker quotes | Corporate Debt Securities | Weighted Average
Valuation techniques used for assets, measured at fair value
Offered quotes (in dollars per share) | $ / shares		$ 101
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Weighted Average | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Probability of default		3.00%
Loss severity		32.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Minimum | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Probability of default		2.00%
Loss severity		30.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Maximum | Collateralized loan obligation secured notes
Valuation techniques used for assets, measured at fair value
Probability of default		3.00%
Loss severity		37.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Corporate Debt Securities
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	17.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Corporate Debt Securities | Weighted Average
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	17.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Residential Mortgage- Backed Securities | Weighted Average
Valuation techniques used for assets, measured at fair value
Probability of default	1.00%	8.00%
Loss severity	35.00%	26.00%
Constant prepayment rate	16.00%	12.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Residential Mortgage- Backed Securities | Minimum
Valuation techniques used for assets, measured at fair value
Probability of default	0.00%	0.00%
Loss severity	30.00%	12.00%
Constant prepayment rate	12.00%	4.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Residential Mortgage- Backed Securities | Maximum
Valuation techniques used for assets, measured at fair value
Probability of default	3.00%	21.00%
Loss severity	50.00%	45.00%
Constant prepayment rate	18.00%	19.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Equity Investments, at Estimated Fair Value
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 7,000	$ 9,500
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Equity Investments, at Estimated Fair Value | Weighted Average
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	9.00%	13.00%
LTM EBITDA exit multiple	9	8
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Equity Investments, at Estimated Fair Value | Minimum
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	7.00%	9.00%
LTM EBITDA exit multiple	3	5
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Equity Investments, at Estimated Fair Value | Maximum
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	14.00%	16.00%
LTM EBITDA exit multiple	10	10
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Interests in Joint Ventures and Partnerships
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 168,200	$ 207,600
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Interests in Joint Ventures and Partnerships | Weighted Average
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	10.00%	12.00%
Average Price Per B O E | $ / barrel	21.92	30.16
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Interests in Joint Ventures and Partnerships | Minimum
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	7.00%	7.00%
Average Price Per B O E | $ / barrel	16.85	21.46
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Interests in Joint Ventures and Partnerships | Maximum
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	20.00%	20.00%
Average Price Per B O E | $ / barrel	24.81	35.67
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Options
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	14.00%	14.00%
LTM EBITDA exit multiple	6	11
Successor Company | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Options | Weighted Average
Valuation techniques used for assets, measured at fair value
Weighted average cost of capital	14.00%	14.00%
LTM EBITDA exit multiple	6	11
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Equity Investments, at Estimated Fair Value
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 46,400	$ 67,400
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Equity Investments, at Estimated Fair Value | Weighted Average
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	5	4
Forward EBITDA multiple	8	7
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Equity Investments, at Estimated Fair Value | Minimum
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	1	1
Forward EBITDA multiple	4	4
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Equity Investments, at Estimated Fair Value | Maximum
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	12	12
Forward EBITDA multiple	10	11
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Interests in Joint Ventures and Partnerships
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 33,000	$ 20,400
LTM EBITDA multiple	8
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Interests in Joint Ventures and Partnerships | Weighted Average
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	8	11
Control Premium		15.00%
Current capitalization rate	7.00%	7.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Interests in Joint Ventures and Partnerships | Minimum
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple		10
Control Premium		15.00%
Current capitalization rate	6.00%	4.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Interests in Joint Ventures and Partnerships | Maximum
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple		13
Current capitalization rate	11.00%	15.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Options
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	10	9
Forward EBITDA multiple	9
Successor Company | Significant Unobservable Inputs (Level 3) | Market comparables | Options | Weighted Average
Valuation techniques used for assets, measured at fair value
LTM EBITDA multiple	10	9
Forward EBITDA multiple	9
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Equity Investments, at Estimated Fair Value | Weighted Average
Valuation techniques used for assets, measured at fair value
Illiquidity discount	10.00%
Weight ascribed to market comparables	62.00%	97.00%
Weight ascribed to discounted cash flows	38.00%	83.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Equity Investments, at Estimated Fair Value | Minimum
Valuation techniques used for assets, measured at fair value
Illiquidity discount	0.00%
Weight ascribed to market comparables	0.00%	0.00%
Weight ascribed to discounted cash flows	0.00%	0.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Equity Investments, at Estimated Fair Value | Maximum
Valuation techniques used for assets, measured at fair value
Illiquidity discount	15.00%
Weight ascribed to market comparables	100.00%	100.00%
Weight ascribed to discounted cash flows	100.00%	100.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Interests in Joint Ventures and Partnerships | Weighted Average
Valuation techniques used for assets, measured at fair value
Weight ascribed to market comparables	34.00%	54.00%
Weight ascribed to discounted cash flows	66.00%	79.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Interests in Joint Ventures and Partnerships | Minimum
Valuation techniques used for assets, measured at fair value
Weight ascribed to market comparables	0.00%	0.00%
Weight ascribed to discounted cash flows	0.00%	0.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Interests in Joint Ventures and Partnerships | Maximum
Valuation techniques used for assets, measured at fair value
Weight ascribed to market comparables	100.00%	100.00%
Weight ascribed to discounted cash flows	100.00%	100.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Options
Valuation techniques used for assets, measured at fair value
Illiquidity discount	10.00%
Weight ascribed to market comparables	50.00%	50.00%
Weight ascribed to discounted cash flows	50.00%	50.00%
Successor Company | Significant Unobservable Inputs (Level 3) | Inputs to both market comparables and discounted cash flow | Options | Weighted Average
Valuation techniques used for assets, measured at fair value
Illiquidity discount	10.00%
Weight ascribed to market comparables	50.00%	50.00%
Weight ascribed to discounted cash flows	50.00%	50.00%
Crude Oil
Valuation techniques used for assets, measured at fair value
Percentage of share in total revenue		23.00%
Crude Oil | Successor Company
Valuation techniques used for assets, measured at fair value
Percentage of share in total revenue	25.00%
Natural Gas
Valuation techniques used for assets, measured at fair value
Percentage of share in total revenue		77.00%
Natural Gas | Successor Company
Valuation techniques used for assets, measured at fair value
Percentage of share in total revenue	75.00%
Natural Resources
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)		$ 176,400
Natural Resources | Successor Company
Valuation techniques used for assets, measured at fair value
Assets, fair value (in dollars)	$ 134,400