DISCLOSURES REGARDING FAIR VALUES OF FINANCIAL INSTRUMENTS - Securities in Unrealized Loss Position (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Continuous unrealized loss position, fair value [Abstract]
One year or greater	$ 39,030	$ 29,760
Less than one year	2,857,724	751,645
Continuous unrealized loss position, Fair Value, Total	2,896,754	781,405
Continuous unrealized loss position, aggregate loss [Abstract]
One year or greater	380	120
Less than one year	17,012	1,843
Unrealized Losses, Total	$ 17,392	$ 1,963