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Fair Value - Additional information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Fair Value    
Fair Value, Assets, Level 1 to Level 2 Transfers $ 0 $ 0
Fair Value, Assets, Level 2 to Level 1 Transfers 0 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 0 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 $ 0 $ 0