Organization and Significant Accounting Policies (Details)	3 Months Ended								12 Months Ended				12 Months Ended
	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Mar. 31, 2011 USD ($)	Mar. 31, 2013 EUR (€)	Mar. 31, 2013 OEM USD ($)	Mar. 31, 2013 Net sales Electronics distributor risk	Mar. 31, 2012 Net sales Electronics distributor risk	Mar. 31, 2011 Net sales Electronics distributor risk	Mar. 31, 2013 Net sales Electronics distributor risk TTI, Inc. USD ($)	Mar. 31, 2012 Net sales Electronics distributor risk TTI, Inc. USD ($)	Mar. 31, 2011 Net sales Electronics distributor risk TTI, Inc. USD ($)	Mar. 31, 2013 Accounts receivable Credit risk item	Mar. 31, 2012 Accounts receivable Credit risk item	Mar. 31, 2013 Interest-bearing deposit placed with European bank USD ($)	Mar. 31, 2013 Interest-bearing deposit placed with European bank EUR (€)
Cash Equivalents
Money market accounts	$ 30,000,000				$ 26,200,000				$ 30,000,000	$ 26,200,000
Inventories
Inventory consigned at customer locations	10,800,000				9,500,000				10,800,000	9,500,000
Property and Equipment
Depreciation expense									43,300,000	42,100,000	50,600,000
Impairment charges									7,300,000	15,800,000
Restricted Cash
Prepayment received from an original equipment manufacturer (OEM)									15,284,000				24,000,000
Restricted cash	17,397,000				2,204,000				17,397,000	2,204,000			15,300,000									2,100,000	1,700,000
Guarantee issued by the European bank in conjunction with the establishment of a VAT registration in The Netherlands	1,900,000								1,900,000			1,500,000
Concentrations of Credit and Other Risks
Net sales	$ 203,034,000	$ 200,297,000	$ 215,991,000	$ 223,632,000	$ 210,668,000	$ 218,795,000	$ 265,514,000	$ 289,856,000	$ 842,954,000	$ 984,833,000	$ 1,018,488,000						$ 127,800,000	$ 125,600,000	$ 133,500,000
Number of customers whose accounts receivable balances exceeded 10% of gross accounts receivable																				0	0
Concentration risk, percentage														45.00%	42.00%	50.00%