Intangible Assets (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012 Y
Poseidon Acquisition [Member]
Intangible Assets (Textual) [Abstract]
Value of intangible assets	1,950
Poseidon Acquisition [Member] | Trade Name [Member]
Intangible Assets (Textual) [Abstract]
Useful life of intangible assets (in years and months)	5
Poseidon Acquisition [Member] | Customer Relationships [Member]
Intangible Assets (Textual) [Abstract]
Useful life of intangible assets (in years and months)	5
Matrix Acquistition [Member]
Intangible Assets (Textual) [Abstract]
Value of intangible assets	9,900
Matrix Acquistition [Member] | Trade Name [Member]
Intangible Assets (Textual) [Abstract]
Useful life of intangible assets (in years and months)	6
Matrix Acquistition [Member] | Customer Relationships [Member]
Intangible Assets (Textual) [Abstract]
Useful life of intangible assets (in years and months)	5
Matrix Acquistition [Member] | Noncompete Agreements [Member]
Intangible Assets (Textual) [Abstract]
Useful life of intangible assets (in years and months)	4