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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 20, 2016
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2017
Mar. 31, 2017
Dec. 28, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading investments for deferred compensation plan       $ 16,914 $ 15,043  
Cost method investments at cost       7,100 7,400  
Lifesize | Preferred Stock            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Fair value of cost method investment           $ 5,600
Jaybird | Revenue Growth            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Maximum earn-out $ 45,000          
Earn-out payments net revenue target period 2 years          
Jaybird | Revenue Growth | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Discount rate for value measurement 16.00%          
Jaybird | Expected payment for first earn-out period            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities       500    
Fair Value, Measurements, Recurring | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading investments for deferred compensation plan       16,914 15,043  
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities       0 0  
Fair Value, Measurements, Recurring | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading investments for deferred compensation plan       0 0  
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities       7,475 9,908  
Fair Value, Measurements, Recurring | Jaybird | Revenue Growth            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities $ 18,000          
Scenario, Forecast | Jaybird | Revenue Growth            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Earn-out payments (up to)   $ 20,000 $ 25,000      
Contingent Consideration | Jaybird            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities       $ 7,900 $ 9,900