DISCLOSURES REGARDING FAIR VALUES OF FINANCIAL INSTRUMENTS - Securities in Unrealized Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Continuous unrealized loss position, fair value [Abstract]
One year or greater	$ 40,113	$ 39,030
Less than one year	2,085,181	2,857,724
Continuous unrealized loss position, Fair Value, Total	2,125,294	2,896,754
Continuous unrealized loss position, aggregate loss [Abstract]
One year or greater	404	380
Less than one year	11,764	17,012
Unrealized Losses, Total	$ 12,168	$ 17,392