Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2015

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

The following tables summarize assets measured at fair value on a recurring basis (in thousands):

	January 31, 2015
	Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	7,061	$	—	$	—
State and local government securities		—		3,550		—
Marketable securities:
State and local government securities		—		101,952		—
Variable-rate demand notes		—		31,830		—
Long-term other assets:
State and local government securities		—		—		823
Equity investments		—		—		123
Total	$	7,061	$	137,332	$	946

	February 1, 2014
	Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	1,211	$	—	$	—
State and local government securities		—		450		—
Marketable securities:
State and local government securities		—		72,016		—
Variable-rate demand notes		—		25,505		—
Long-term other assets:
State and local government securities		—		—		825
Equity investments		—		—		147
Total	$	1,211	$	97,971	$	972