Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013 segment	Sep. 29, 2012	Mar. 31, 2013
Segment Reporting Information [Line Items]
Number of operating segments			4
Revenues	$ 246,810	$ 260,161	$ 493,707	$ 507,998
Gross profit	77,128	80,054	154,159	159,328
Operating income	13,529	13,984	25,981	25,844
Depreciation expense	1,565	1,347	2,940	2,712
Intangibles amortization	3,109	3,474	6,418	6,938
Capital expenditures	2,087	1,114	4,090	2,902
Assets	857,933	892,981	857,933	892,981	878,001
Operating Segments [Member] | North America Products [Member]
Segment Reporting Information [Line Items]
Revenues	21,615	24,116	42,651	45,358
Gross profit	9,377	10,622	18,289	20,311
Operating income	2,874	3,151	3,978	4,986
Depreciation expense	500	307	827	607
Intangibles amortization	0	0	0	0
Capital expenditures	907	435	2,173	1,232
Assets	135,387	135,072	135,387	135,072
Operating Segments [Member] | North America Services [Member]
Segment Reporting Information [Line Items]
Revenues	194,518	203,418	384,184	397,444
Gross profit	56,220	56,704	111,407	113,305
Operating income	9,678	8,659	19,101	16,385
Depreciation expense	878	881	1,744	1,796
Intangibles amortization	3,103	3,468	6,406	6,926
Capital expenditures	1,052	434	1,545	1,065
Assets	618,158	653,080	618,158	653,080
Operating Segments [Member] | International Products [Member]
Segment Reporting Information [Line Items]
Revenues	21,576	23,537	48,748	47,648
Gross profit	9,565	10,364	20,366	21,205
Operating income	924	1,508	2,573	3,435
Depreciation expense	137	124	276	242
Intangibles amortization	0	0	0	0
Capital expenditures	95	180	320	504
Assets	67,293	70,596	67,293	70,596
Operating Segments [Member] | International Services [Member]
Segment Reporting Information [Line Items]
Revenues	9,101	9,090	18,124	17,548
Gross profit	1,966	2,364	4,097	4,507
Operating income	53	666	329	1,038
Depreciation expense	50	35	93	67
Intangibles amortization	6	6	12	12
Capital expenditures	33	65	52	101
Assets	$ 37,095	$ 34,233	$ 37,095	$ 34,233