Equity Method Investments and Related-Party Transactions - Summary of Condensed Financial Information Of Significant Non-consolidated Equity Method Investment (Detail) - Euro Infrastructure Co [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 69,559	$ 81,299	$ 70,477
Gross profit	52,653	57,941	49,579
Income from continuing operations	8,869	6,684	3,575
Net income	8,869	6,684	3,575
Net income attributable to Euro Infrastructure Co.	4,523	3,409	$ 1,823
Current assets	129,928	110,464
Noncurrent assets	211,619	226,194
Total assets	341,547	336,658
Current liabilities	16,066	16,335
Noncurrent liabilities	30,259	24,608
Noncontrolling interest	144,659	144,900
Total equity	295,222	295,715
Total liabilities and equity	$ 341,547	$ 336,658