Goodwill and Intangible Assets - Schedule of Amortizable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013	Feb. 29, 2012
Amortizable intangible assets
Finite-lived intangible assets, gross	$ 124,865	$ 56,072
Less accumulated amortization	21,440	11,537
Finite-Lived Intangible Assets, Net	103,425	44,535
Customer Related Intangibles [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	81,110	47,441
Less accumulated amortization	11,633	7,284
Noncompete Agreements [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	5,219	5,314
Less accumulated amortization	3,437	2,584
Trademarks [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	5,169	2,100
Certification Marks [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	253	264
Engineering Drawings [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	24,600	0
Backlog [Member]
Amortizable intangible assets
Finite-lived intangible assets, gross	$ 8,514	$ 953