The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References+ Details

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details

Goodwill and Other Intangible Assets (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jan. 31, 2012
Goodwill And Other Intangible Assets (Textual) [Abstract]
Goodwill	$ 4,320		$ 4,320		$ 4,320
Good will impairment			0
Aggregate amortization expense	$ 169,000	$ 167,000	$ 338,000	$ 339,000
Maximum [Member]
Goodwill And Other Intangible Assets [Line Items]
Useful life of intangible assets			15 years
Minimum [Member]
Goodwill And Other Intangible Assets [Line Items]
Useful life of intangible assets			8 years