INTEREST RATE SWAPS (Details) $ in Thousands	3 Months Ended					9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) item
Deferred tax benefit						$ (1,322)	$ (2,034)
Other comprehensive (loss) income, net of tax	$ (307)	$ (3,358)	$ (2,127)	$ 918	$ (962)	(5,792)	$ (44)
Interest rate swaps
Number of interest rate swap agreements | item								2
Notional amount	286,100					286,100		$ 290,600
Derivative liability	$ 10,084					10,084		4,292
Deferred tax benefit						$ (2,582)		$ (1,099)