Share-Based Plans Share-Based Plans - Options (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 30, 2016	Jan. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding stock options, beginning balance	1,174,902
Exercised	(78,813)
Forfeited	0
Outstanding stock options, ending balance	1,096,089	1,174,902
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, Vested and Expected to Vest, Outstanding, Number	1,091,213
Options, Exercisable, Number	842,651
Options, Outstanding, Weighted Average Exercise Price	$ 38.52	$ 38.26
Options, Exercises in Period, Weighted Average Exercise Price	34.66
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	0.00
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	38.54
Options, Exercisable, Weighted Average Exercise Price	$ 39.30
Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 11 months 21 days
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	2 years 11 months 21 days
Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 8 months 6 days
Options, Outstanding, Intrinsic Value	$ 8,042
Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	7,993
Options, Exercisable, Intrinsic Value	$ 5,532
Award Requisite Service Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Term	7 years