Operating Segments (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015 Segment Category	Mar. 30, 2014	Mar. 31, 2013
Operating Segments [Abstract]
Number of reportable segments									1
Number of product categories									4
Market Reporting Information [Line Items]
Revenues									$ 549,619,000	$ 560,086,600	$ 752,565,000
Gross profit	27,690,800	32,512,900	35,436,000	35,248,800	30,084,800	36,142,400	36,492,800	35,437,900	130,888,500	138,157,900	147,039,200
Selling, general, administrative, and interest expenses									116,104,000	111,846,000	118,045,000
Restructuring charge	573,400	0	0	0	0	0	0	0	573,400	0	0
Operating and interest expenses									116,677,000	111,846,000	118,045,000
Income before provision for income taxes	(272,900)	2,622,800	5,817,200	6,044,000	4,750,800	7,129,800	7,522,400	6,909,200	14,211,100	26,312,200	28,994,400
Reporting Units [Member] | Public Carriers, Contractors & Program Managers [Member]
Market Reporting Information [Line Items]
Revenues									127,426,000	149,196,000	111,146,000
Gross profit									24,081,000	31,013,000	24,183,000
Reporting Units [Member] | Government System Operators [Member]
Market Reporting Information [Line Items]
Revenues									31,495,000	33,757,000	35,857,000
Gross profit									8,283,000	8,497,000	9,231,000
Reporting Units [Member] | Private System Operators [Member]
Market Reporting Information [Line Items]
Revenues									86,725,000	81,559,000	85,456,000
Gross profit									22,926,000	23,110,000	24,365,000
Reporting Units [Member] | Commercial Dealers & Resellers [Member]
Market Reporting Information [Line Items]
Revenues									134,195,000	140,552,000	138,737,000
Gross profit									37,977,000	39,396,000	38,345,000
Reporting Units [Member] | Retailer, Independent Dealer Agents & Carriers [Member]
Market Reporting Information [Line Items]
Revenues									169,778,000	155,023,000	167,895,000
Gross profit									37,622,000	36,142,000	35,903,000
Reporting Units [Member] | Revenue, excluding Major 3PL relationship [Member]
Market Reporting Information [Line Items]
Revenues									549,619,000	560,087,000	539,091,000
Gross profit									130,889,000	138,158,000	132,027,000
Reporting Units [Member] | Major 3PL relationship [Member]
Market Reporting Information [Line Items]
Revenues									0	0	213,474,000
Gross profit									$ 0	$ 0	$ 15,012,000