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Interest Costs - Summary of Interest Costs (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule Of Interest [Line Items]        
Interest costs charged to expense $ 26,164 $ 26,250 $ 78,928 $ 83,977
Amortization of deferred financing costs 1,484 1,328 4,355 3,901
Accretion of debt discount 3,551 3,116 10,312 12,508
Amortization of debt premium       (1,018)
Interest expense 31,199 30,694 93,595 99,368
Total interest costs 31,580 30,882 94,160 99,807
Property and Equipment [Member]        
Schedule Of Interest [Line Items]        
Interest costs capitalized       11
Software [Member]        
Schedule Of Interest [Line Items]        
Interest costs capitalized $ 381 $ 188 $ 565 $ 428