Revenue from Contracts with Customers (Summary of Remaining Unsatisfied Performance Obligations) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 14,657
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 10,771
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-07-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 3,508
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 378
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-07-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-07-01
Disaggregation Of Revenue [Line Items]
Estimated recognition of remaining performance obligations	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year