Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 29, 2013 segment	Jun. 30, 2012	Mar. 31, 2013
Segment Reporting Information [Line Items]
Number of operating segments	4
Revenues	$ 246,897	$ 247,837
Gross profit	77,031	79,274
Operating Income (Loss)	12,452	11,860
Depreciation expense	1,375	1,365
Intangibles amortization	3,309	3,464
Capital expenditures	2,003	1,788
Assets	860,545	885,093	878,001
Operating Segments [Member] | North America Products [Member]
Segment Reporting Information [Line Items]
Revenues	21,036	21,242
Gross profit	8,912	9,689
Operating Income (Loss)	1,104	1,835
Depreciation expense	327	300
Intangibles amortization	0	0
Capital expenditures	1,266	797
Assets	136,232	132,403
Operating Segments [Member] | North America Services [Member]
Segment Reporting Information [Line Items]
Revenues	189,666	194,026
Gross profit	55,187	56,601
Operating Income (Loss)	9,423	7,726
Depreciation expense	866	915
Intangibles amortization	3,303	3,458
Capital expenditures	493	631
Assets	624,599	656,286
Operating Segments [Member] | International Products [Member]
Segment Reporting Information [Line Items]
Revenues	27,172	24,111
Gross profit	10,801	10,841
Operating Income (Loss)	1,649	1,927
Depreciation expense	139	118
Intangibles amortization	0	0
Capital expenditures	225	324
Assets	65,404	64,865
Operating Segments [Member] | International Services [Member]
Segment Reporting Information [Line Items]
Revenues	9,023	8,458
Gross profit	2,131	2,143
Operating Income (Loss)	276	372
Depreciation expense	43	32
Intangibles amortization	6	6
Capital expenditures	19	36
Assets	$ 34,310	$ 31,539