DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS, Unobservable Input Reconciliation (Details) - Recurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of assets measured at fair value on recurring basis using significant unobservable inputs [Roll Forward]
Beginning balance	$ 2,843	$ 1,194	$ 2,985	$ 1,332
Settlements	(125)	(117)	(265)	(262)
Unrealized gains (losses) included in other comprehensive income (loss)	(1)	(4)	(3)	3
Balance at end of period	2,717	1,073	2,717	1,073
Corporate Debt Securities [Member]
Reconciliation of assets measured at fair value on recurring basis using significant unobservable inputs [Roll Forward]
Beginning balance	840	1,191	982	1,329
Settlements	(125)	(117)	(265)	(262)
Unrealized gains (losses) included in other comprehensive income (loss)	(1)	(4)	(3)	3
Balance at end of period	714	1,070	714	1,070
Common stocks Financial services [Member]
Reconciliation of assets measured at fair value on recurring basis using significant unobservable inputs [Roll Forward]
Beginning balance	3	3	3	3
Settlements	0	0	0	0
Unrealized gains (losses) included in other comprehensive income (loss)	0	0	0	0
Balance at end of period	3	3	3	3
Nonredeemable Preferred Stock [Member]
Reconciliation of assets measured at fair value on recurring basis using significant unobservable inputs [Roll Forward]
Beginning balance	2,000	0	2,000	0
Settlements	0	0	0	0
Unrealized gains (losses) included in other comprehensive income (loss)	0	0	0	0
Balance at end of period	$ 2,000	$ 0	$ 2,000	$ 0