Consolidated Income Statements (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
REVENUES	$ 122,352,000	$ 121,098,000	$ 370,430,000	$ 358,570,000
Cost of revenues	98,224,000	93,392,000	293,135,000	276,626,000
Gross profit	24,128,000	27,706,000	77,295,000	81,944,000
General and administrative expenses	13,834,000	13,204,000	40,789,000	38,270,000
Income before income tax provision	10,294,000	14,502,000	36,506,000	43,674,000
Income tax provision	3,462,000	5,727,000	13,492,000	17,615,000
NET INCOME	$ 6,832,000	$ 8,775,000	$ 23,014,000	$ 26,059,000
Net income per common and common equivalent share
Basic	$ 0.33	$ 0.42	$ 1.11	$ 1.23
Diluted	$ 0.33	$ 0.41	$ 1.10	$ 1.22
Weighted average common and common equivalent shares
Basic	20,599,000	20,936,000	20,784,000	21,157,000
Diluted	20,786,000	21,256,000	21,015,000	21,406,000