Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Nov. 30, 2012	Feb. 29, 2012
Amortized intangible assets
Weighted Average Remaining Life (in years)	6 years 4 months 24 days	7 years
Gross Carrying Amount	$ 40,394	$ 40,394
Accumulated Amortization	18,826	16,343
Amortized intangible assets, net	21,568	24,051
Tradenames [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)		9 months 18 days
Gross Carrying Amount	1,234	1,234
Accumulated Amortization	1,234	1,139
Amortized intangible assets, net		95
Customer lists [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)	6 years 7 months 6 days	7 years 2 months 12 days
Gross Carrying Amount	37,887	37,887
Accumulated Amortization	16,990	14,699
Amortized intangible assets, net	20,897	23,188
Noncompete [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)
Gross Carrying Amount	500	500
Accumulated Amortization	500	500
Amortized intangible assets, net
Patent [Member]
Amortized intangible assets
Weighted Average Remaining Life (in years)	5 years 2 months 12 days	6 years
Gross Carrying Amount	773	773
Accumulated Amortization	102	5
Amortized intangible assets, net	$ 671	$ 768