Income Taxes (Tables)

12 Months Ended

Jan. 31, 2019

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,
	2019		2018		2017
Tax at U.S. federal statutory rate	21.0	%	33.8	%	35.0	%
Impact of the Tax Cuts and Jobs Act	—		(0.1	)	—
State and local income taxes, net of U.S. federal tax benefit	1.7		1.6		0.7
Tax credit for research activities	(2.3	)	(1.8	)	(3.7	)
Tax benefit on qualified production activities	—		(3.0	)	(2.8	)
Tax benefit from foreign-derived intangible income	(0.8	)	—		—
Tax benefit on insurance premiums	(0.8	)	(1.3	)	(1.5	)
Change in uncertain tax positions	—		0.1		(0.3	)
Foreign tax rate difference	0.1		—		(0.3	)
Impact of settlement of stock-based awards	(2.4	)	1.2		—
Other, net	(0.8	)	—		0.4
Effective Tax Rate	15.7	%	30.5	%	27.5	%

Significant components of the company's income tax provision

The expense (benefit) for income taxes consists of:

	For the years ended January 31, 2019
	2019			2018			2017
Current expense (benefit):
Federal	$	6,910		$	17,057		$	6,375
State	1,099			1,549			591
Foreign	735			148			388
	8,744			18,754			7,354
Deferred expense (benefit):
Federal	1,018			(613		)	330
State	73			(13		)	14
Foreign	(138		)	(161		)	(37		)
	953			(787		)	307
Income tax expense	$	9,697		$	17,967		$	7,661

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,
	2019			2018
Deferred tax assets:
Accounts receivable	$	147		$	184
Inventories	1,110			664
Accrued vacation	695			647
Insurance obligations	187			137
Warranty obligations	200			262
Postretirement benefits	1,800			1,929
Uncertain tax positions	487			491
Share-based compensation	1,834			1,761
Other accrued liabilities	913			54
	7,373			6,129
Deferred tax (liabilities):
Depreciation and amortization	(8,498		)	(6,082		)
Other	(518		)	(643		)
	(9,016		)	(6,725		)
Net deferred tax (liability)	$	(1,643	)	$	(596	)

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,
	2019			2018			2017
Gross unrecognized tax benefits at beginning of year	$	2,216		$	2,110		$	2,327
Increases in tax positions related to the current year	415			426			279
Decreases in tax positions related to prior years	—			—			(193		)
Decreases as a result of lapses in applicable statutes of limitation	(403		)	(320		)	(303		)
Gross unrecognized tax benefits at end of year	$	2,228		$	2,216		$	2,110