Organization and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2017 USD ($) business_group	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Nature of Business and Organization
Number of business groups | business_group									2
Cash Equivalents
Money market accounts	$ 2,055				$ 738				$ 2,055	$ 738
Inventories
Inventory consigned at customer locations	8,800				8,500				8,800	8,500
Property and Equipment
Depreciation									35,000	36,900	$ 38,700
Concentration Risk [Line Items]
Net sales	$ 197,519	$ 188,029	$ 187,308	$ 184,935	$ 183,926	$ 177,184	$ 186,123	$ 187,590	$ 757,791	$ 734,823	$ 823,192
Net sales | Electronics distributor risk
Concentration Risk [Line Items]
Concentration risk, percentage									46.00%	42.00%	45.00%
Net sales | Electronics distributor risk | TTI, Inc.
Concentration Risk [Line Items]
Net sales									$ 104,400	$ 99,300	$ 124,400
Accounts receivable | Credit risk
Concentration Risk [Line Items]
Number of customers whose accounts receivable balances exceeded 10% of gross accounts receivable									0
Concentration risk, percentage									0.00%