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Leases - Schedule of Lease Cost (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Finance lease costs:        
Depreciation of leased assets $ 1,151 $ 1,036 $ 3,336 $ 3,295
Interest of lease liabilities 995 977 2,977 2,973
Total finance lease costs 2,146 2,013 6,313 6,268
Operating lease costs 16,616 15,873 49,436 48,639
Variable lease costs 1,311 1,229 4,181 3,159
Short term lease costs 1,407 1,378 3,725 4,308
Other lease costs 1,848 1,654 5,491 4,754
Total rents and leases 21,182 20,134 62,833 60,860
Total lease costs $ 23,328 $ 22,147 $ 69,146 $ 67,128