STOCK COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2017
Number of Shares
Options outstanding, beginning of period (in shares)	155,961
Granted (in shares)	0
Exercised (in shares)	(45,132)
Forfeited or expired (in shares)	0
Options outstanding, end of period (in shares)	110,829
Options exercisable, end of period (in shares)	110,829
Weighted Average Exercise Price
Options outstanding, beginning of period (in dollars per share)	$ 8.48
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	8.95
Forfeited or expired (in dollars per share)	0.00
Options outstanding, end of period (in dollars per share)	8.29
Options exercisable, end of period (in dollars per share)	$ 8.29
Weighted Average Remaining Contractual Term
Options outstanding	1 year 8 months 1 day	1 year 9 months 11 days
Options exercisable	1 year 8 months 1 day
Aggregate Intrinsic Value
Options outstanding, beginning of period	$ 2,974
Granted	0
Exercised	742
Forfeited or expired	0
Options outstanding, end of period	1,230
Options exercisable, end of period	$ 1,230
Number of Shares
Nonvested shares outstanding, beginning of period (in shares)	1,005,813
Granted (in shares)	224,102
Vested (in shares)	(245,842)
Forfeited or expired (in shares)	0
Nonvested shares outstanding, end of period (in shares)	984,073
Weighted Average Fair Value at Grant
Nonvested shares outstanding, beginning of period (in dollars per share)	$ 29.89
Granted (in dollars per share)	25.11
Vested (in dollars per share)	27.29
Forfeited or expired (in dollars per share)	0.00
Nonvested shares outstanding, end of period (in dollars per share)	$ 29.45
Stock based compensation expense not yet recognized in income	$ 18,300
Weighted average remaining period for unrecognized stock based compensation	3 years 1 month 10 days