INVESTMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Marketable securities, at amortized cost	$ 5,914	$ 5,196
Municipal Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Marketable securities, at amortized cost	5,914	5,196
Amortized Cost, Due from one through five years	14,398	17,636
Amortized Cost, Due from six through ten years	9,337	7,388
Amortized Cost, Due from eleven through twenty years	805	0
Amortized Cost, Total	30,454	30,220
Market Value, Current	6,006	5,264
Market Value, Due from one through five years	15,204	18,527
Market Value, Due from six through ten years	9,711	7,777
Market Value, Due from eleven through twenty years	762	0
Market Value, Total	$ 31,683	$ 31,568