Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017
Assets [Abstract]
Inventories	$ 276,040	$ 255,185	$ 246,630
Liabilities [Abstract]
Accrued expenses and other	47,067	46,327	39,939
Deferred income taxes	57,094	59,073	88,360
Equity [Abstract]
Retained earnings	$ 237,882	213,019	$ 104,391
Ollie's Army Loyalty Program Liability [Abstract]
Expiration period of discount awards from date of issuance	90 days
Balance at beginning of period	$ 0
Balance at end of period	8,532
Gift Card Liability [Abstract]
Balance at beginning of period	1,223
Gift card issuances	908
Gift card redemption and breakage	(990)
Balance at end of period	1,141
ASU 2014-09 [Member]
Assets [Abstract]
Inventories		255,524
Liabilities [Abstract]
Accrued expenses and other		54,180
Deferred income taxes		57,150
Equity [Abstract]
Retained earnings		207,428
Ollie's Army Loyalty Program Liability [Abstract]
Balance at beginning of period	8,321
Revenue deferred	2,575
Revenue recognized	(2,364)
Balance at end of period	$ 8,532
Adjustments Due to ASU 2014-09 [Member] | ASU 2014-09 [Member]
Assets [Abstract]
Inventories		339
Liabilities [Abstract]
Accrued expenses and other		7,853
Deferred income taxes		(1,923)
Equity [Abstract]
Retained earnings		$ (5,591)