Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Class A Common Shares	Class B Common Shares	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings	Basis difference related to acquisition of commonly controlled entity	Accumulated other comprehensive loss
Balance at Jan. 31, 2015	$ 1,011,120			$ (86,938)	$ 908,679	$ 220,826	$ (24,993)	$ (6,454)
Balance (in shares) at Jan. 31, 2015		80,666	7,733	3,036
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income	47,366				0	47,366	0	0
Stock-based compensation expense, before related tax effects	3,521				3,521	0	0	0
Stock units granted	42				42	0	0	0
Stock units granted (in shares)		3
Exercise of stock options, net of settlement of taxes	2,601				2,601	0	0	0
Exercise of stock options, net of settlement of taxes (in shares)		224
Vesting of restricted stock units, net of settlement of taxes	(1,261)				(1,261)	0	0	0
Vesting of restricted stock units, net of settlement of taxes (in shares)		51
Excess tax benefits related to stock-based compensation	1,552				1,552	0	0	0
Foreign currency translation	1,814							1,814
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(361)							(361)
Dividends paid	(17,607)					(17,607)
Balance at May. 02, 2015	1,048,787			$ (86,938)	915,134	250,585	(24,993)	(5,001)
Balance (in shares) at May. 02, 2015		80,944	7,733	3,036
Balance at Jan. 30, 2016	904,924			$ (266,531)	930,011	287,140	(24,993)	(20,703)
Balance (in shares) at Jan. 30, 2016		74,185	7,733	10,211
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income	30,014					30,014	0	0
Stock-based compensation expense, before related tax effects	3,589				3,589	0	0	0
Stock units granted	68				68	0	0	0
Stock units granted (in shares)		5
Exercise of stock options, net of settlement of taxes	243				243	0	0	0
Exercise of stock options, net of settlement of taxes (in shares)		17
Vesting of restricted stock units, net of settlement of taxes	(1,042)				(1,042)	0	0	0
Vesting of restricted stock units, net of settlement of taxes (in shares)		75
Excess tax benefits related to stock-based compensation	(167)				(167)	0	0	0
Foreign currency translation	12,149							12,149
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	126							126
Dividends paid	(16,337)					(16,337)
Balance at Apr. 30, 2016	$ 933,567			$ (266,531)	$ 932,702	$ 300,817	$ (24,993)	$ (8,428)
Balance (in shares) at Apr. 30, 2016		74,282	7,733	10,211