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Leases - Finance Lease Obligations And Operating Lease Obligations (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Remainder of 2019 $ 12,369  
2020 13,295  
2021 8,952  
2022 5,451  
2023 3,462  
Thereafter 6,830  
Total minimum lease payments 50,359 $ 48,792
Less: Amounts representing interest (5,436)  
Present value of future minimum lease payments 44,923  
Less: Current obligation under leases 14,241  
Long-term lease obligations 30,682  
Remainder of 2019 3,947  
2020 2,539  
2021 1,596  
2022 663  
2023 284  
Thereafter 16  
Total minimum lease payments 9,045  
Less: Amounts representing executory costs (255)  
Less: Amounts representing interest (488)  
Present value of future minimum lease payments 8,302  
Less: Current obligation under leases 4,328 4,806
Long-term lease obligations 3,974 $ 3,824
Other Party Operating Leases [Member]    
Remainder of 2019 11,595  
2020 12,240  
2021 8,042  
2022 4,615  
2023 3,047  
Thereafter 6,007  
Total minimum lease payments 45,546  
Related Party Operating Leases [Member]    
Remainder of 2019 774  
2020 1,055  
2021 910  
2022 836  
2023 415  
Thereafter 823  
Total minimum lease payments $ 4,813