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Fair Value Measurements - Level 3 Reconciliation of the Earn-out Liability (Details)
$ in Thousands
9 Months Ended
Oct. 29, 2017
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning balance $ 1,242
Changes in the fair value of contingent earn-out obligations 0
Current acquisitions 17,188
Payments (466)
Ending balance 17,964
Cycleo [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning balance 1,242
Changes in the fair value of contingent earn-out obligations 0
Current acquisitions 0
Payments (466)
Ending balance 776
Triune Systems [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning balance 0
Changes in the fair value of contingent earn-out obligations 0
Current acquisitions 0
Payments 0
Ending balance 0
AptoVision Technologies Inc. [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning balance 0
Changes in the fair value of contingent earn-out obligations 0
Current acquisitions 17,188
Payments 0
Ending balance $ 17,188