Intangible Assets (Changes in Carrying Amount) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Mar. 31, 2013		Mar. 31, 2012	Mar. 31, 2011
Intangible Assets [Roll Forward]
Intangible assets, beginning balance				$ 126,541				$ 120,133	$ 126,541		$ 120,133
Intangibles amortization	(3,321)	(3,478)	(3,474)	(3,464)	(3,541)	(3,249)	(3,176)	(3,059)	(13,737)		(13,025)	(12,156)
Foreign currency translation adjustment									4		5
Current period acquisitions (see Note 11)											19,428
Other									(2,140)	[1]
Intangible assets, ending balance	110,668				126,541				110,668		126,541	120,133
Trademarks [Member]
Intangible Assets [Roll Forward]
Intangible assets, beginning balance				27,739				27,739	27,739		27,739
Intangibles amortization									0		0
Foreign currency translation adjustment									0		0
Current period acquisitions (see Note 11)											0
Other									0
Intangible assets, ending balance	27,739				27,739				27,739		27,739
Non-competes and backlogs [Member]
Intangible Assets [Roll Forward]
Intangible assets, beginning balance				5,359				1,328	5,359		1,328
Intangibles amortization									(1,609)		(1,100)
Foreign currency translation adjustment									4		5
Current period acquisitions (see Note 11)											5,126
Other									0
Intangible assets, ending balance	3,754				5,359				3,754		5,359
Customer relationships [Member]
Intangible Assets [Roll Forward]
Intangible assets, beginning balance				93,443				91,066	93,443		91,066
Intangibles amortization									(12,128)		(11,925)
Foreign currency translation adjustment									0		0
Current period acquisitions (see Note 11)											14,302
Other									(2,140)	[1]
Intangible assets, ending balance	$ 79,175				$ 93,443				$ 79,175		$ 93,443

[1] Primarily represents the write-off of the net book value of intangible assets due to the probable divestiture of our non-controlling interest in Genesis Networks Integration Services, LLC, a joint venture company which was formed in conjunction with Genesis Networks Enterprises, LLC.