Income Tax (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	32.60%	32.00%	31.20%	32.30%
Tax Adjustments, Settlements, and Unusual Provisions			$ 709