INCOME TAXES - Summary of Significant Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Deferred Income Tax Assets:
Compensation	$ 10,605	$ 10,783
Inventory	2,244
Straight-line lease	6,642	6,856
Provision for bad debts and sales allowances	33,221	17,819
Supplemental employee retirement plan	401	415
Net operating loss	3,362	2,983
Other	2,891	212
Gross deferred income tax assets	59,366	39,068
Less valuation allowance	(2,303)	(1,648)
Net deferred income tax assets	57,063	37,420
Deferred income tax liabilities:
Depreciation and amortization	(25,617)	(16,234)
Intangibles	(21,742)	(22,804)
Prepaid expenses and other	(2,405)	(2,585)
Inventory		(246)
Total deferred income tax liabilities	(49,764)	(41,869)
Net deferred tax assets	$ 7,299
Net deferred tax liabilities		$ (4,449)