Income Taxes (Tables)

12 Months Ended

Jan. 31, 2014

Income Tax Disclosure [Abstract]

Reconciliation of income tax computed at the federal statutory rate to the company's effective income tax rate

The reconciliation of income tax computed at the federal statutory rate to the Company's effective income tax rate was as follows:

	For the years ended January 31,
	2014		2013		2012
Tax at U.S. federal statutory rate	35.0	%	35.0	%	35.0	%
State and local income taxes, net of U.S. federal tax benefit	1.5		1.6		1.0
Tax benefit on qualified production activities	(2.9	)	(3.2	)	(2.4	)
Tax credit for research activities	(1.2	)	(0.9	)	(0.7	)
Other, net	0.2		(0.2	)	0.2
	32.6	%	32.3	%	33.1	%

Significant components of the company's income tax provision

Significant components of the Company's income tax provision were as follows:

	For the years ended January 31,
	2014		2013			2012
Income taxes:
Currently payable	$	20,098	$	26,894		$	19,705
Deferred expense (benefit)	623		(1,803		)	5,358
	$	20,721	$	25,091		$	25,063

Significant components of the company's deferred tax assets and liabilities

Significant components of the Company's deferred tax assets and liabilities were as follows:

	As of January 31,
	2014			2013			2012
Current deferred tax assets:
Accounts receivable	$	111		$	70		$	58
Inventories	583			507			452
Accrued vacation	1,032			1,118			1,248
Insurance obligations	567			576			559
Warranty obligations	898			661			595
Other accrued liabilities	181			175			387
	3,372			3,107			3,299
Non-current deferred tax assets (liabilities):
Postretirement benefits	2,799			2,826			2,571
Depreciation and amortization	(11,522		)	(9,114		)	(9,673		)
Uncertain tax positions	2,219			1,969			1,673
Share-based compensation	2,309			1,613			981
Other	669			253			(70		)
	(3,526		)	(2,453		)	(4,518		)
Net deferred tax (liability) asset	$	(154	)	$	654		$	(1,219	)

Summary of the activity related to the gross unrecognized tax benefits (excluding interest and penalties)

A summary of the activity related to the gross unrecognized tax benefits (excluding interest and penalties) is as follows:

	For the years ended January 31,
	2014			2013			2012
Gross unrecognized tax benefits at beginning of year	$	4,213		$	3,567		$	3,112
Increases in tax positions related to the current year	795			993			699
Decreases as a result of lapses in applicable statutes of limitation	(348		)	(347		)	(244		)
Gross unrecognized tax benefits at end of year	$	4,660		$	4,213		$	3,567