Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	$1 Par Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	redeemable noncontrolling interest [Member]
Balance at beginning of period at Jan. 31, 2020	$ 314,646	$ 67,436	$ 61,508	$ (111,183)	$ 302,300	$ (5,415)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	4,047				4,047
Other comprehensive income (loss):
Cumulative foreign currency translation adjustment	(2,579)					(2,579)
Postretirement benefits reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(3)					(3)
Reclassification and Redeption of Noncontrolling Interest (see Note 1)	215		215
Cash dividends	(4,658)		90		(4,748)
Shares issued on stock options exercised, net of shares withheld for employee taxes	(113)	11	(124)
Shares issued on vesting of stock units, net of shares withheld for employee taxes	(627)	53	(680)
Share-based compensation	1,496		1,496
Balance at end of period at Apr. 30, 2020	$ 312,424	67,500	62,505	(111,183)	301,599	(7,997)
Other comprehensive income (loss):
Common Stock, Dividends, Per Share, Declared	$ 0.13
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ 1
Temporary Equity, Carrying Amount, Beginning Balance at Jan. 31, 2020							$ 21,302
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income							(98)
Recalassification and Redemption of Noncontrolling Interest (see Note 1)							(21,204)
Temporary Equity, Carrying Amount, Ending Balance at Apr. 30, 2020							0
Balance at beginning of period at Jan. 31, 2021	331,355	67,533	66,670	(111,183)	311,676	(3,341)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	9,620				9,620
Other comprehensive income (loss):
Cumulative foreign currency translation adjustment	2,344					2,344
Postretirement benefits reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	20					20
Shares issued on stock options exercised, net of shares withheld for employee taxes	(41)	1	(42)
Shares issued on vesting of stock units, net of shares withheld for employee taxes	(1,047)	49	(1,096)
Share-based compensation	1,734		1,734
Balance at end of period at Apr. 30, 2021	343,985	$ 67,583	$ 67,266	$ (111,183)	$ 321,296	$ (977)
Other comprehensive income (loss):
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ (5)
Temporary Equity, Carrying Amount, Beginning Balance at Jan. 31, 2021							0
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income							0
Temporary Equity, Carrying Amount, Ending Balance at Apr. 30, 2021							$ 0