RECLASSIFICATION FROM ACCUMULATED OTHER COMPREHENSIVE INCOME INTO NET INCOME - Summary of Amounts Reclassified out of Accumulated Other Comprehensive Income into Net Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on settlement of securities	$ (14,767)	$ (4,357)
Other-than-temporary impairment (“OTTI”) on securities	1,071	328
Total reclassifications	(41,798)	(56,865)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on settlement of securities	(24,697)	(4,492)
Other-than-temporary impairment (“OTTI”) on securities	1,071	328
Total reclassifications	$ (23,626)	$ (4,164)