Segment Reporting (Service Type) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues - On-site	$ 205,235	$ 224,560	$ 622,595	$ 682,109
Revenues - Products	46,854	51,379	137,492	149,427
Gross profit	81,732	88,313	241,060	263,760
Data Infrastructure [Member]
Segment Reporting Information [Line Items]
Revenues - On-site	62,664	58,326	186,185	186,998
Gross profit	16,556	14,550	48,432	46,110
Voice Communications [Member]
Segment Reporting Information [Line Items]
Revenues - On-site	142,571	166,234	436,410	495,111
Gross profit	45,057	51,472	132,148	151,238
Technology Products [Member]
Segment Reporting Information [Line Items]
Revenues - Products	46,854	51,379	137,492	149,427
Gross profit	$ 20,119	$ 22,291	$ 60,480	$ 66,412