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Operating Segment Information (Detail) - (Table 2) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]      
Domestic $ 1,405,239,000 $ 1,334,951,000 $ 1,314,223,000
International 1,405,239,000 1,334,951,000 1,314,223,000
Revenues 1,405,239,000 1,334,951,000 1,314,223,000
Domestic (Non-US Title) [Member]      
Segment Reporting Information [Line Items]      
Domestic 329,089,000 319,089,000 315,154,000
International 329,089,000 319,089,000 315,154,000
Revenues 329,089,000 319,089,000 315,154,000
Domestic [Member]      
Segment Reporting Information [Line Items]      
Domestic 1,255,668,000 1,222,721,000 1,200,797,000
International 1,255,668,000 1,222,721,000 1,200,797,000
Revenues 1,255,668,000 1,222,721,000 1,200,797,000
International [Member]      
Segment Reporting Information [Line Items]      
Domestic 149,571,000 112,230,000 113,426,000
International 149,571,000 112,230,000 113,426,000
Revenues $ 149,571,000 $ 112,230,000 $ 113,426,000