Income Taxes (Tables)

9 Months Ended

Oct. 31, 2016

Income Tax Disclosure [Abstract]

Summary of Income Taxes

The following table provides details of income taxes for the periods indicated:

	Three Months Ended October 31,						Nine Months Ended October 31,
	2016			2015			2016			2015
	(in thousands)
Income before income taxes	$	29,802		$	30,496		$	40,610		$	75,896
Provision for income taxes		757			1,035			1,150			4,484
Effective tax rate	2.5		%		3.4	%	2.8		%		5.9	%