SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Total Revenues Based on Location of the Customer and Long-Lived Assets by Geographic Regions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 3,357,202	$ 3,467,362	$ 3,502,918	$ 3,142,585	$ 3,152,882	$ 3,316,665	$ 3,288,262	$ 2,994,267	$ 13,470,067	$ 12,752,076	$ 11,359,113
Total long-lived assets	283,841				309,260				283,841	309,260	309,720
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues									11,800,140	11,140,163	10,183,596
Total long-lived assets	257,587				284,693				257,587	284,693	281,729
Other Locations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues									1,669,927	1,611,913	1,175,517
Total long-lived assets	$ 26,254				$ 24,567				$ 26,254	$ 24,567	$ 27,991