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LONG-TERM DEBT (Details) - USD ($) |  |  |  | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2017 | May 22, 2017 | May 03, 2016 | Dec. 31, 2017 | May 21, 2017 | Dec. 19, 2016 | Jul. 01, 2016 | Jan. 11, 2016 | Jan. 10, 2016 | Dec. 24, 2014 | Dec. 19, 2014
PSE&G |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 11.30% |
Outstanding debt |  |  |  | $ 2,400,000 |  |  |  |  |  |  |
One Communications Debt |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 37,500,000 |  |  |  |  |  |  |  |  |
Term loan assumed |  |  | $ 35,400,000 |  |  |  |  |  |  |  |
Outstanding debt |  |  |  | 35,600,000 |  |  |  |  |  |  |
Financing costs |  | $ 300,000 |  |  |  |  |  |  |  |  |
Unamortized financing costs |  |  |  | 300,000 |  |  |  |  |  |  |
One Communications Debt | Three month LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Commitment fee (as a percent) |  |  | 3.25% |  |  |  |  |  |  |  |
One Communications Debt | Minimum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Percentage of notional amount required for hedging arrangement |  | 30.00% |  |  |  |  |  |  |  |  |
One Communications Debt | Minimum | Three month LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.50% |  |  |  |  |  |  |  |  |
One Communications Debt | Maximum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Period to enter into hedging arrangement |  | 90 days |  |  |  |  |  |  |  |  |
One Communications Debt | Maximum | Three month LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.75% |  |  |  |  |  |  |  |  |
One Communications Debt | Overdraft Facility |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 10,000,000 |  |  | $ 5,000,000 |  |  |  |  |  |
Borrowings |  |  |  | $ 0 |  |  |  |  |  |  |
One Communications Debt | Overdraft Facility | Three month LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.75% |  |  |  |  |  |  |
Viya Debt |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Term loan assumed |  |  |  |  |  |  | $ 60,000,000 |  |  |  |
Net Leverage Ratio maximum amount of cash |  |  |  | $ 50,000,000 |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.00% |  |  |  |  |  |  |
Outstanding debt |  |  |  | $ 60,000,000 |  |  |  |  |  |  |
Financing costs |  |  |  |  |  |  | $ 900,000 |  |  |  |
Unamortized financing costs |  |  |  | $ 800,000 |  |  |  |  |  |  |
Period of waiver for maintaining net leverage ratio |  |  |  | 1 year |  |  |  |  |  |  |
Revolver loan | Credit facility |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 400,000,000 | $ 275,000,000 |  | $ 225,000,000
Borrowings |  |  |  | $ 0 |  |  |  |  |  |  |
Revolver loan | Credit facility | Minimum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Commitment fee (as a percent) |  |  |  | 0.175% |  |  |  |  |  |  |
Revolver loan | Credit facility | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.50% |  |  |  |  |  |  |
Revolver loan | Credit facility | Minimum | Base rate |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.50% |  |  |  |  |  |  |
Revolver loan | Credit facility | Maximum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Commitment fee (as a percent) |  |  |  | 0.25% |  |  |  |  |  |  |
Revolver loan | Credit facility | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.75% |  |  |  |  |  |  |
Revolver loan | Credit facility | Maximum | Base rate |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.75% |  |  |  |  |  |  |
Letter of credit sub-facility | Credit facility |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | 10,000,000
Letter of credit sub-facility | Credit facility | Mobility Funds |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | 25,000,000
Swingline sub-facility | Credit facility |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 10,000,000
Swingline sub-facility | Credit facility | Federal Funds Effective Rate |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.50% |  |  |  |  |  |  |
Swingline sub-facility | Credit facility | Minimum | Base rate |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.00% |  |  |  |  |  |  |
Term loans | Credit facility |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 200,000,000 |  |  |
Term loans | Ahana Debt |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Term loan assumed |  |  |  |  |  |  |  |  |  | $ 38,900,000 |
Term loans | Ahana Debt | Minimum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (as a percent) |  |  |  |  |  |  |  |  |  | 4.50% |
Term loans | Ahana Debt | Maximum |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (as a percent) |  |  |  |  |  |  |  |  |  | 6.00% |
Ahana Operations | Series A Notes |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Secured debt principal amount |  |  |  |  |  | $ 20,600,000 |  |  |  |  |
Stated interest rate |  |  |  |  |  | 4.427% |  |  |  |  |
Ahana Operations | Series B Notes |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Secured debt principal amount |  |  |  |  |  | $ 45,200,000 |  |  |  |  |
Stated interest rate |  |  |  |  |  | 5.327% |  |  |  |  |
Ahana Operations | Series A and Series B Notes |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Outstanding debt |  |  |  | $ 61,500,000 |  |  |  |  |  |  |
Financing costs |  |  |  | 2,800,000 |  |  |  |  |  |  |
Unamortized financing costs |  |  |  | 2,700,000 |  |  |  |  |  |  |
Cash flow hedge | Interest rate swap |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ 11,000,000 |  |  |  |  |  |  |  |  |  |
Interest expenses | $ 1.874 |  |  |  |  |  |  |  |  |  |
HURRICANES IRMA AND MARIA | Viya Debt |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |
Service credit |  |  |  | $ 19,300,000 |  |  |  |  |  |  |

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