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Leases - Schedule of Future Minimum Lease Payments to be Received from Sales-Type Leases (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Sales Type And Direct Financing Leases Lease Receivable Fiscal Year Maturity [Abstract]  
Remainder of 2019 $ 9,005
2020 1,056
2021 493
2022 209
2023 78
Thereafter 2
Total $ 10,843