Organization and Significant Accounting Policies - Concentrations of Credit and Other Risk (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Concentration Risk [Line Items]
Net sales	$ 293,174	$ 294,741	$ 327,397	$ 345,242	$ 355,794	$ 350,175	$ 349,233	$ 327,616	$ 1,260,554	$ 1,382,818	$ 1,200,181
Accounts receivable | Credit risk
Concentration Risk [Line Items]
Number of Customers, Concentration Risk, Receivables	0				0				0	0
Concentration risk, percentage									10.00%	10.00%
Revenue from Contract with Customer, Product and Service Benchmark [Member] | Electronics distributor risk
Concentration Risk [Line Items]
Concentration risk, percentage									40.40%	42.20%	39.20%
Revenue from Contract with Customer, Product and Service Benchmark [Member] | Electronics distributor risk | TTI, Inc.
Concentration Risk [Line Items]
Number of Customers, Concentration Risk									1
Net sales									$ 154,600	$ 184,300	$ 133,500