Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Assets
Cash and cash equivalents	$ 30,720	$ 22,444
Accounts receivable, net of allowance for doubtful accounts of $6,300 and $6,273	152,967	163,888
Inventories, net	55,469	56,956
Costs/estimated earnings in excess of billings on uncompleted contracts	101,458	87,634
Other assets	26,068	22,678
Total current assets	366,682	353,600
Property, plant and equipment, net	27,720	27,109
Goodwill, net	345,397	346,438
Intangibles, net	110,668	126,541
Other assets	27,534	34,335
Total assets	878,001	888,023
Liabilities
Accounts payable	66,236	71,095
Accrued compensation and benefits	25,186	31,151
Deferred revenue	33,869	35,601
Billings in excess of costs/estimated earnings on uncompleted contracts	13,386	14,315
Income taxes	6,650	2,574
Other liabilities	37,126	32,697
Total current liabilities	182,453	187,433
Long-term debt	187,648	179,621
Other liabilities	25,653	26,585
Total liabilities	395,754	393,639
Stockholders’ equity
Preferred stock authorized 5,000, par value $1.00, none issued	0	0
Common stock authorized 100,000, par value $.001, 16,133 and 17,480 shares outstanding, 25,898 and 25,730 issued	26	26
Additional paid-in capital	486,075	478,726
Retained earnings	370,775	347,242
Accumulated other comprehensive income	1,457	7,262
Treasury stock, at cost 9,765 and 8,250 shares	(376,086)	(338,872)
Total stockholders’ equity	482,247	494,384
Total liabilities and stockholders’ equity	$ 878,001	$ 888,023