Fair Value Measurements (Tables)

6 Months Ended

Jul. 31, 2012

Fair Value Measurements [Abstract]

Fair value hierarchy for assets and liabilities on recurring basis

	Fair Value at July 31, 2012
	Level 1		Level 2		Level 3		Total
Assets:
Available-for-sale securities	$	215	$	—	$	—	$	215
SERP assets - employer		876		—		—		876
SERP assets - employee		16,177		—		—		16,177
Hedge derivatives		—		25		—		25
Total	$	17,268	$	25	$	—	$	17,293
Liabilities:
SERP liabilities - employee	$	16,177	$	—	$	—	$	16,177
Hedge derivatives		—		1,820		—		1,820
	$	16,177	$	1,820	$	—	$	17,997