Earnings Per Share ("EPS") (Tables)

12 Months Ended

Jan. 31, 2016

Earnings Per Share (EPS) [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The composition of basic and diluted EPS (in thousands, except per share data) is as follows:

Year ended January 31:	2016		2015		2014
Net income	$	265,736	$	175,172	$	179,932
Weighted average common shares - basic	35,898		38,172		38,020
Effect of dilutive securities:
Equity-based awards	199		182		208
Weighted average common shares - diluted	36,097		38,354		38,228
Net income per share
Basic	$	7.40	$	4.59	$	4.73
Diluted	$	7.36	$	4.57	$	4.71