Fair Value (Tables)

12 Months Ended

Jan. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of the Company's Assets and Liabilities measured at Fair Value

The three levels of the hierarchy and the distribution within it of the Company’s assets and liabilities, measured at fair value on a recurring basis, were as follows:

	Assets and Liabilities at Fair Value as of January 31, 2015
(in thousands)	Level 1		Level 2		Level 3		Total
ASSETS:
Money market funds	$	122,047	$	—	$	—	$	122,047
Derivative financial instruments	—		10,293		—		10,293
Total assets measured at fair value	$	122,047	$	10,293	$	—	$	132,340
LIABILITIES:
Derivative financial instruments	—		—		—		—
Total liabilities measured at fair value	$	—	$	—	$	—	$	—

	Assets and Liabilities at Fair Value as of February 1, 2014
(in thousands)	Level 1		Level 2		Level 3		Total
ASSETS:
Money market funds	$	148,024	$	—	$	—	$	148,024
Derivative financial instruments	—		969		—		969
Total assets measured at fair value	$	148,024	$	969	$	—	$	148,993
LIABILITIES:
Derivative financial instruments	—		2,555		—		2,555
Total liabilities measured at fair value	$	—	$	2,555	$	—	$	2,555