Operating Segment Information (Detail) - (Table 2) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Domestic	$ 419,625,000	$ 502,114,000	$ 449,629,000	$ 415,788,000	$ 416,845,000	$ 467,237,000	$ 399,674,000	$ 393,978,000	$ 1,787,157,000	$ 1,677,734,000	$ 1,567,083,000
International	419,625,000	502,114,000	449,629,000	415,788,000	416,845,000	467,237,000	399,674,000	393,978,000	1,787,157,000	1,677,734,000	1,567,083,000
Revenues	$ 419,625,000	$ 502,114,000	$ 449,629,000	$ 415,788,000	$ 416,845,000	$ 467,237,000	$ 399,674,000	$ 393,978,000	1,787,157,000	1,677,734,000	1,567,083,000
Domestic (Non-US Title) [Member]
Segment Reporting Information [Line Items]
Domestic									337,028,000	326,655,000	326,945,000
International									337,028,000	326,655,000	326,945,000
Revenues									337,028,000	326,655,000	326,945,000
Domestic [Member]
Segment Reporting Information [Line Items]
Domestic									1,572,056,000	1,473,229,000	1,404,254,000
International									1,572,056,000	1,473,229,000	1,404,254,000
Revenues									1,572,056,000	1,473,229,000	1,404,254,000
International [Member]
Segment Reporting Information [Line Items]
Domestic									215,101,000	204,505,000	162,829,000
International									215,101,000	204,505,000	162,829,000
Revenues									$ 215,101,000	$ 204,505,000	$ 162,829,000