RESTRICTED INVESTMENTS AND BOND COLLATERAL - Available for Sale Maturity Schedule (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Within one year, Amortized cost	$ 452
Due in five years or less, Amortized cost	17,142
Due after five years to ten years, Amortized cost	7,142
Due in more than ten years, Amortized cost	8,194
Restricted Investments and Bond Collateral [Member]
Schedule of Available-for-sale Securities [Line Items]
Within one year, Amortized cost	327
Due in five years or less, Amortized cost	13,961
Due after five years to ten years, Amortized cost	11,323
Due in more than ten years, Amortized cost	8,268
Available-for-sale securities, amortized cost	33,879	0
Within one year, Fair Value	331
Due in five years or less, Fair Value	13,996
Due after five years to ten years, Fair Value	11,440
Due in more than ten years, Fair Value	8,290
Fair value		$ 34,057