Operating Segment Information (Detail) - (Table 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Domestic	$ 352,967	$ 346,867	$ 142,812	$ 359,168	$ 419,625	$ 502,114	$ 449,629	$ 415,788	$ 1,201,814	$ 1,787,157	$ 1,677,734
International	352,967	346,867	142,812	359,168	419,625	502,114	449,629	415,788	1,201,814	1,787,157	1,677,734
Revenues	$ 352,967	$ 346,867	$ 142,812	$ 359,168	$ 419,625	$ 502,114	$ 449,629	$ 415,788	1,201,814	1,787,157	1,677,734
Domestic (Non-US Title) [Member]
Segment Reporting Information [Line Items]
Domestic									249,982	337,028	326,635
International									249,982	337,028	326,635
Revenues									249,982	337,028	326,635
Domestic [Member]
Segment Reporting Information [Line Items]
Domestic									1,054,343	1,572,045	1,473,588
International									1,054,343	1,572,045	1,473,588
Revenues									1,054,343	1,572,045	1,473,588
International [Member]
Segment Reporting Information [Line Items]
Domestic									147,471	215,112	204,146
International									147,471	215,112	204,146
Revenues									$ 147,471	$ 215,112	$ 204,146