Income Taxes (Tables)

6 Months Ended

Jul. 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 July 31,						Six Months Ended July 31,
	2016			2015			2016			2015
	(in thousands)
Income before income taxes	$	9,433		$	25,048		$	10,808		$	45,400
Provision for income taxes		801			1,951			393			3,449
Effective tax rate	8.5		%		7.8	%	3.6		%		7.6	%