Quarterly Financial Information (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended								12 Months Ended
	Jan. 11, 2017	Jan. 10, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales			$ 557,452	$ 371,741	$ 485,156	$ 430,044	$ 559,845	$ 361,025	$ 458,713	$ 419,398	$ 1,844,393	$ 1,798,982	$ 1,750,707
Cost of sales (including occupancy costs)			395,298	272,377	331,447	296,867	368,845	277,986	307,846	288,283	1,295,989	1,242,960	1,182,365
Gross profit			162,154	99,364	153,709	133,177	191,000	83,039	150,867	131,115	548,404	556,022	568,342
Selling, general, and administrative expenses			128,705	118,133	116,511	117,549	136,594	115,716	109,449	108,076	480,897	469,836	432,007
Impairment charges and store closing costs			13,129	0	182	0	43,142	167	160	168	13,312	43,637	2,030
Operating income (loss)			20,320	(18,769)	37,016	15,628	11,264	(32,844)	41,258	22,871	54,195	42,549	134,305
Interest (income) expense, net			101	152	32	(6)	61	3	(1)	2	279	65	15
Income (loss) before income taxes			20,219	(18,921)	36,984	15,634	11,203	(32,847)	41,259	22,869	53,916	42,484	134,290
Income tax expense			7,919	(8,332)	13,627	5,546	2,444	(13,389)	15,707	8,800	18,760	13,562	45,191
Net income from continuing operations			12,300	(10,589)	23,357	10,088	8,759	(19,458)	25,552	14,069	35,156	28,922	89,099
Net loss from discontinued operations, net of tax			(21,771)	(29,849)	(1,282)	(462)	(4,723)	(2,377)	350	(280)	(53,364)	(7,126)	(9,357)
Net income (loss) attributable to The Finish Line, Inc.			$ (9,471)	$ (40,438)	$ 22,075	$ 9,626	$ 4,036	$ (21,835)	$ 25,902	$ 13,789	$ (18,208)	$ 21,892	$ 81,993
Basic (loss) earnings from continuing operations per share attributable to The Finish Line, Inc. shareholders (in USD per share)			$ 0.30	$ (0.26)	$ 0.56	$ 0.24	$ 0.20	$ (0.44)	$ 0.56	$ 0.31	$ 0.86	$ 0.64	$ 1.86
Income (loss) from discontinued operations, per basic share (in USD per share)			(0.53)	(0.74)	(0.03)	(0.01)	(0.11)	(0.05)	0.01	(0.01)	(1.31)	(0.15)	(0.15)
Net income (loss) per basic share (in USD per share)			(0.23)	(1.00)	0.53	0.23	0.09	(0.49)	0.57	0.30	(0.45)	0.49	1.71
Diluted (loss) earnings from continuing operations per share attributable to The Finish Line, Inc. shareholders (in USD per share)			0.30	(0.26)	0.56	0.24	0.20	(0.44)	0.56	0.30	0.85	0.64	1.85
Income (loss) from discontinued operations, per diluted share (in USD per share)			(0.53)	(0.74)	(0.03)	(0.01)	(0.11)	(0.05)	0.01	0.00	(1.29)	(0.16)	(0.15)
Diluted earnings per share attributable to The Finish Line, Inc. shareholders (in USD per share)			(0.23)	(1.00)	0.53	0.23	0.09	(0.49)	0.57	0.30	(0.44)	0.48	1.70
Dividends declared per share (in USD per share)	$ 0.11	$ 0.10	$ 0.11	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.09	$ 0.09	$ 0.09	$ 0.41	$ 0.37	$ 0.33
Net sales, percentage			100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%
Cost of sales (including occupancy costs), percentage			70.90%	73.30%	68.30%	69.00%	65.90%	77.00%	67.10%	68.70%
Gross profit, percentage			29.10%	26.70%	31.70%	31.00%	34.10%	23.00%	32.90%	31.30%
Selling, general and administrative expenses, percentage			23.10%	31.70%	24.00%	27.30%	24.40%	32.10%	23.90%	25.80%
Impairment charges and store closing costs, percentage			2.40%	0.00%	0.00%	0.00%	7.70%	0.00%	0.00%	0.00%
Operating income (loss), percentage			3.60%	(5.00%)	7.70%	3.70%	2.00%	(9.10%)	9.00%	5.50%
Interest (income) expense, net, percentage			(0.00%)	0.10%	(0.00%)	(0.00%)	(0.00%)	(0.00%)	(0.00%)	(0.00%)
Income (loss) from continuing operations before income taxes, percentage			3.60%	(5.10%)	7.70%	3.70%	2.00%	(9.10%)	9.00%	5.50%
Income tax expense (benefit), percentage			1.40%	(2.30%)	2.80%	1.30%	0.40%	(3.70%)	3.40%	2.10%
Net income (loss) from continuing operations, percentage			2.20%	(2.80%)	4.90%	2.40%	1.60%	(5.40%)	5.60%	3.40%
Net loss from discontinued operations, net of tax, percentage			(3.90%)	(8.10%)	(0.30%)	(0.10%)	(0.90%)	(0.60%)	0.10%	(0.10%)
Net income (loss) attributable to The Finish Line, Inc., percentage			(1.70%)	(10.90%)	4.60%	2.30%	0.70%	(6.00%)	5.70%	3.30%