RESTRICTED INVESTMENTS AND BOND COLLATERAL - Maturities of Available-for-Sale Securities (Details) - Restricted Investments and Bond Collateral $ in Thousands	Sep. 30, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Due within one year, Amortized Cost Basis	$ 1,258
Due in five years or less, Amortized Cost Basis	15,015
Due after five years to ten years, Amortized Cost Basis	4,356
Due in more than ten years, Amortized Cost Basis	14,846
Cost basis	35,475
Due within one year, Fair Value	1,189
Due in five years or less, Fair Value	14,640
Due after five years to ten years, Fair Value	4,110
Due in more than ten years, Fair Value	14,915
Available-for-sale Securities, Fair Value	$ 34,854