Consolidated Income Statements - Unaudited - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
REVENUES	$ 137,612,000	$ 128,459,000
Cost of revenues	108,829,000	102,877,000
Gross profit	28,783,000	25,582,000
General and administrative expenses	14,629,000	13,461,000
Income before income tax provision	14,154,000	12,121,000
Income tax provision	5,379,000	4,630,000
NET INCOME	$ 8,775,000	$ 7,491,000
Net income per common and common equivalent share
Basic	$ 0.47	$ 0.38
Diluted	$ 0.46	$ 0.38
Weighted average common and common equivalent shares
Basic	18,811,000	19,572,000
Diluted	19,000,000	19,754,000