Segment Information - Income from Segments to Consolidated Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting [Abstract]
Total EBITDA	$ 43,794		$ 53,937		$ 94,798	$ 108,045
Less:
Income tax expense	4,520		2,489		9,038	6,298
Interest expense, net	5,810		7,116		12,226	14,408
Depreciation and amortization	17,839		17,195		35,634	33,468
Net income	$ 15,625	$ 22,275	$ 27,137	$ 26,734	$ 37,900	$ 53,871