Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.7.0.1
FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis $ 70,459 $ 73,470
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax (9) (2)
Available-for-sale Securities 70,450 73,468
Municipal Bonds and Notes [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 6,143 43,490
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax 0 0
Available-for-sale Securities 6,143 43,490
Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 15,561 1,673
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax (9) (2)
Available-for-sale Securities 15,552 1,671
Financial Institution Instruments [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 48,755 28,307
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax 0 0
Available-for-sale Securities $ 48,755 $ 28,307