Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Liabilities:
Long-term obligations	$ 2,255,017	$ 1,557,883
Derivative financial instruments		2,156
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Liabilities:
Long-term obligations	758,762
Significant Other Observable Inputs (Level 2) [Member]
Liabilities:
Long-term obligations	$ 1,496,255	1,557,883
Derivative financial instruments		$ 2,156