Income Taxes (Tables)

9 Months Ended

Oct. 31, 2016

Income Tax Disclosure [Abstract]

Provision for Income Taxes

The provision for income taxes was as follows:

	Three months ended October 31,						Nine months ended October 31,
	2016			2015			2016			2015
Income tax expense	$	9,677		$	7,204		$	5,560		$	9,763
Effective tax rate	18.8		%	34.2		%	14.9		%	22.3		%