Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Aug. 31, 2012	Feb. 29, 2012
Amortized intangible assets
Weighted Average Remaining Life (in years)	6 years 7 months 6 days	7 years
Gross Carrying Amount	$ 40,394	$ 40,394
Accumulated Amortization	18,003	16,343
Finite Lived Customer Lists Net	21,659	23,188
Tradenames [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)	2 months 12 days	9 months 18 days
Tradenames,Gross Carrying Amount	1,234	1,234
Accumulated Amortization	1,205	1,139
Tradenames Net	29	95
Customer lists [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)	6 years 9 months 18 days	7 years 2 months 12 days
Customer lists, Gross Carrying Amount	37,887	37,887
Accumulated Amortization	16,228	14,699
Finite Lived Customer Lists Net	21,659	23,188
Noncompete [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)
Noncompete ,Gross Carrying Amount	500	500
Accumulated Amortization	500	500
Noncompete,Net
Patent [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)	5 years 6 months	6 years
Patent,Gross Carrying Amount	773	773
Accumulated Amortization	70	5
Patents, Net	$ 703	$ 768