Financial Instruments and Fair Value Measurements - Carrying Value and Estimated Fair Values (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financial assets:
Costa Rica government obligations	$ 3,059	$ 0
Carrying Amount
Financial liabilities:
Interest rate swap	19,768	25,578
Carrying Amount | Credit Facility | 2023 Term A Loan
Financial liabilities:
Senior secured term loan	176,161	188,788
Carrying Amount | Credit Facility | 2024 Term B Loan
Financial liabilities:
Senior secured term loan	294,923	306,503
Fair Value
Financial liabilities:
Interest rate swap	19,768	25,578
Fair Value | Credit Facility | 2023 Term A Loan
Financial liabilities:
Senior secured term loan	175,121	186,678
Fair Value | Credit Facility | 2024 Term B Loan
Financial liabilities:
Senior secured term loan	296,942	308,339
Costa Rica government obligations | Carrying Amount
Financial assets:
Costa Rica government obligations	3,059	0
Costa Rica government obligations | Fair Value
Financial assets:
Costa Rica government obligations	$ 3,059	$ 0