Consolidated Statements of Shareholders' Equity Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]		Additional Paid-in Capital [Member]	Treasury Stock [Member]		Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Parent [Member]	Noncontrolling Interest [Member]	Stock Options [Member]	Stock Options [Member] Common Stock [Member]		Stock Options [Member] Additional Paid-in Capital [Member]	Stock Options [Member] Parent [Member]	Employee Stock Option [Member]	Employee Stock Option [Member] Common Stock [Member]		Employee Stock Option [Member] Additional Paid-in Capital [Member]	Employee Stock Option [Member] Parent [Member]
Balance at beginning of period at Jan. 31, 2012	$ 180,590	$ 32,566	[1]	$ 9,607	$ (53,362)		$ 193,650	$ (1,962)	$ 180,499	$ 91
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	19,023						19,043		19,043	(20)
Other comprehensive income (loss):
Cumulative foreign currency translation adjustment	23							23	23
Postretirement benefits reclassified from accumulated other comprehensive income (loss) after tax benefit	38							38	38
Cash dividends	(3,807)			15			(3,822)		(3,807)
Treasury stock, at cost (in shares)	28,897,000				14,449,000	[1]
Stock surrendered and employees' stock options exercised											(631)	(10)	[1]	(621)	(631)	676	20	[1]	656	676
Share-based compensation	525	0	[1]	525					525
Tax benefit from exercise of stock options	58			58					58
Balance at end of period at Apr. 30, 2012	196,495	32,576	[1]	10,240	(53,362)		208,871	(1,901)	196,424	71
Balance at beginning of period at Jan. 31, 2013	221,447	65,223		5,885	(53,362)		205,695	(2,095)	221,346	101
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,994						14,003		14,003	(9)
Other comprehensive income (loss):
Cumulative foreign currency translation adjustment	(54)							(54)	(54)
Postretirement benefits reclassified from accumulated other comprehensive income (loss) after tax benefit	30							30	30
Cash dividends	(4,361)			25			(4,386)		(4,361)
Treasury stock, at cost (in shares)	28,897,000				28,897,000
Stock surrendered and employees' stock options exercised											(599)	(19)		(580)	(599)	462	36		426	462
Share-based compensation	829	0		829					829
Tax benefit from exercise of stock options	144			144					144
Balance at end of period at Apr. 30, 2013	$ 231,892	$ 65,240		$ 6,729	$ (53,362)		$ 215,312	$ (2,119)	$ 231,800	$ 92

[1] These share and per share amounts do not reflect the July 2012 two-for-one stock split discussed in Note 1 to these unaudited consolidated financial statements. The adjusted common shares, treasury shares and dividends per share were 65,152, 28,897 and $0.105, respectively.