Note 10 - SARs Activity (Details) - Stock Appreciation Rights (SARs) [Member] $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jul. 31, 2016 USD ($) $ / shares shares
Outstanding (in shares) | shares	2,596
Outstanding (in dollars per share) | $ / shares	$ 14.74
Granted (in shares) | shares	380
Granted (in dollars per share) | $ / shares	$ 18.64
Exercised (in shares) | shares	(60)
Exercised (in dollars per share) | $ / shares	$ 10.60
Expired (in shares) | shares	(17)
Expired (in dollars per share) | $ / shares	$ 12.58
Forfeited (in shares) | shares	(6)
Forfeited (in dollars per share) | $ / shares	$ 12.16
Outstanding (in shares) | shares	2,893
Outstanding (in dollars per share) | $ / shares	$ 15.36
Outstanding	4 years 292 days
Outstanding | $	$ 13,510
Vested and expected to vest at July 31, 2016 (1) (in shares) | shares	2,891	[1]
Vested and expected to vest at July 31, 2016 (1) (in dollars per share) | $ / shares	$ 15.36	[1]
Vested and expected to vest at July 31, 2016 (1)	4 years 292 days	[1]
Vested and expected to vest at July 31, 2016 (1) | $	$ 13,495	[1]
Vested and exercisable at July 31, 2016 (in shares) | shares	1,896
Vested and exercisable at July 31, 2016 (in dollars per share) | $ / shares	$ 12.83
Vested and exercisable at July 31, 2016	3 years 292 days
Vested and exercisable at July 31, 2016 | $	$ 12,427

[1] The expected-to-vest SARs are the result of applying the pre-vesting forfeiture rate assumptions to total outstanding SARs.