SUBSEQUENT EVENTS (Details) - $60 million senior unsecured private placement notes (2018) [Member] - Subsequent Event [Member] $ in Millions	Apr. 23, 2018 USD ($) Integer
Subsequent Event [Line Items]
Unsecured debt, notional amount \| $	$ 60
Debt, term (in years) \| Integer	10
Debt Instrument, Interest Rate, Stated Percentage	3.93%

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant