Shareholders' Equity (Tables)

3 Months Ended

Apr. 30, 2019

Apr. 30, 2018

Shareholders Equity [Abstract]

Class of Treasury Stock

The Company’s common share issuance activity for the three months ended April 30, 2019 is summarized as follows:  

	Shares		Weighted-average price per share
Treasury stock balance at January 31, 2019	22,305,464		$	46.53
Shares of treasury stock repurchased under share repurchase program	345,927		103.15
Shares of treasury stock reissued for equity incentive plans	(167,862	)
Treasury stock balance at April 30, 2019	22,483,529		$	47.40

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following tables summarize the change in the components of AOCI for the three months ended April 30, 2019 and 2018:

	Foreign currency translation adjustment, net of taxes			Unrealized gains (losses) on cash flow hedges, net of taxes			Total
Balance at January 31, 2019	$	43,786		$	—		$	43,786
Other comprehensive income (loss) before reclassification	(40,523		)	(575		)	(41,098		)
Reclassification of (gain) loss from AOCI into income	—			364			364
Balance at April 30, 2019	$	3,263		$	(211	)	$	3,052

	Foreign currency translation adjustment, net of taxes			Unrealized gains (losses) on cash flow hedges, net of taxes		Total
Balance at January 31, 2018	$	288,292		$	—	$	288,292
Other comprehensive income (loss) before reclassification	(88,252		)	—		(88,252		)
Reclassification of (gain) loss from AOCI into income	—			—		—
Balance at April 30, 2018	$	200,040		$	—	$	200,040