DEBT AND OTHER OBLIGATIONS - Amount of Collateral Pledged for Repurchase Agreements, Grouped by Asset Class (Details) - Successor $ in Thousands	Jun. 30, 2016 USD ($)
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	$ 177,463
Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	177,463
Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
U.S. government-related securities
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
U.S. government-related securities | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
U.S. government-related securities | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
U.S. government-related securities | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
U.S. government-related securities | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
States, municipals, and political subdivisions
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
States, municipals, and political subdivisions | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
States, municipals, and political subdivisions | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
States, municipals, and political subdivisions | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
States, municipals, and political subdivisions | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Other asset-back securities
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Other asset-back securities | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Other asset-back securities | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Other asset-back securities | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Other asset-back securities | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Corporate securities
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Corporate securities | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Corporate securities | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Corporate securities | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Corporate securities | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Equity securities
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Equity securities | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Equity securities | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Equity securities | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Equity securities | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Non-U.S. sovereign debt
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Non-U.S. sovereign debt | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Non-U.S. sovereign debt | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Non-U.S. sovereign debt | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Non-U.S. sovereign debt | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Loans
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	177,463
Loans | Overnight and Continuous
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	177,463
Loans | Up to 30 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Loans | 30-90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	0
Loans | Greater Than 90 days
Debt Instrument [Line Items]
Collateral pledged for repurchase agreements	$ 0