Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Income Tax Examination [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 612,000,000	$ 542,000,000
Expected increase in U.S. Federal income taxes upon distribution of earnings	107,000,000	98,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5,251,000	18,748,000	17,564,000
Income Tax Examination, Penalties and Interest Expense	1,802,000	1,874,000	650,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	6,010,000	9,752,000
Change in Unrecognized Tax Benefits	19,293,000
Change in Income Tax Penalties and Interest Accrued	3,742,000
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards	$ 98,000,000
Minimum [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2006
Minimum [Member] | Internal Revenue Service [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2010
Minimum [Member] | New York City [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2011
Maximum [Member] | Internal Revenue Service [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2012
Maximum [Member] | New York City [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2012