Segment Information - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of operating business segments | segment	4
Revenues	$ 487,374	$ 453,869	$ 407,144
Major Customer | Total Revenue
Segment Reporting Information [Line Items]
Revenues	$ 208,000	$ 186,800	$ 175,400
Major Customer | Total Revenue | Customer Concentration Risk
Segment Reporting Information [Line Items]
Percentage of total revenue from major customer	43.00%	41.00%	43.00%
Puerto Rico | Total Revenue | Customer Concentration Risk
Segment Reporting Information [Line Items]
Percentage of total revenue from major customer	7.00%	7.00%	7.00%