Fair Value Measurement (Tables)

12 Months Ended

Jan. 31, 2013

Notes To Financial Statements [Abstract]

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2013:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,016	)	$	—	$	—	$	(6,016	)

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2012:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,120	)	$	—	$	—	$	(6,120	)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Table Text Block]

The fair value measurement of our contingent consideration as of January 31, 2013 encompasses the following significant unobservable inputs:

Unobservable Inputs	Range
Total estimated contingent consideration	$0	-	$7,904
Discount rate	14%	-	16%
Timing of cash flows (in years)	0	-	5

Summary of Level 3 Activity

The following table summarizes contingent consideration activity:

Balance as of January 31, 2011	$	5,342
New contingent consideration	1,090
Payments/adjustments	(540		)
Interest accretion	228
Balance as of January 31, 2012	$	6,120
New contingent consideration	1,208
Payments	(1,504		)
Adjustments	(42		)
Interest accretion	234
Balance as of January 31, 2013	$	6,016

Schedule Of Notes Payable Table

The following table summarizes the fair value and carrying value of notes payable:

As of January 31,	2013		2012
Fair value of notes payable	$	293,867	$	259,821
Carrying value of notes payable	$	218,546	$	214,573