SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Details 3) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets, Resale Agreements
Gross Amounts of Recognized Assets	$ 2,050,000	$ 1,425,000
Gross Amounts Offset on the Consolidated Balance Sheets	(450,000)	(200,000)
Net Amounts of Assets Presented on the Consolidated Balance Sheets	1,600,000	1,225,000
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	0	(425,000)
Collateral Received	(1,593,503)	(797,172)
Net Amount	6,497	2,828
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	450,000	995,000
Gross Amounts Offset on the Consolidated Balance Sheets	(450,000)	(200,000)
Net Amounts of Liabilities Presented on the Consolidated Balance Sheets	0	795,000
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	0	(425,000)
Collateral Posted	0	(370,000)
Net Amount	$ 0	$ 0