INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Dec. 31, 2017	Jan. 31, 2017	Dec. 31, 2016	Jan. 31, 2016	Dec. 31, 2015
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net income		$ 19,053	$ 13,168	$ 2,941	$ 4,544	$ 12,381	$ 8,938	$ 8,176	$ 2,838	$ 39,706		$ 32,333		$ 31,436
Big River [Member]
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue											$ 817,112		$ 851,434		$ 863,554
Gross profit											60,259		88,841		85,451
Income from continuing operations											32,243		63,292		62,193
Net income											$ 32,243		$ 63,292		62,193
Patriot [Member]
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	[1]														115,614
Gross profit	[1]														14,424
Income from continuing operations	[1]														11,100
Net income	[1]														$ 11,100

[1] For Patriot, results are for the five month period ended May 31, 2015 as the Company's equity interest in Patriot was sold June 1, 2015.