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Leases - Schedule of Future Minimum Lease Payments to be Received from Sales-Type Leases (Detail)
$ in Thousands
Jun. 30, 2019
USD ($)
Sales Type And Direct Financing Leases Lease Receivable Fiscal Year Maturity [Abstract]  
Remainder of 2019 $ 5,705
2020 1,112
2021 525
2022 220
2023 81
Thereafter 3
Total $ 7,646