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Leases - Schedule of Future Minimum Lease Payments under Operating Leases for Continuing and Discontinued Operations (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2018 $ 39,243 [1]
Operating Leases, 2019 25,162
Operating Leases, 2020 17,686
Operating Leases, 2021 10,746
Operating Leases, 2022 and thereafter 13,642
Operating Leases, Total 106,479
Continuing Operation [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2018 33,406 [1]
Operating Leases, 2019 24,375
Operating Leases, 2020 17,686
Operating Leases, 2021 10,746
Operating Leases, 2022 and thereafter 13,642
Operating Leases, Total 99,855
Discontinued Operations [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2018 5,837 [1]
Operating Leases, 2019 787
Operating Leases, Total $ 6,624
[1] Amounts include payments due associated with executed early terminations of real estate leases.