SECURITIES LENDING (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Securities borrowed
Gross amounts recognized		$ 909,331
Gross amounts offset in the consolidated balance sheets	[1]
Net amounts included in the consolidated balance sheets		909,331
Amounts not offset in the consolidated balance sheets but eligible for offsetting upon counterparty default	[2]	909,331
Net amounts
Securities loaned
Gross amounts recognized		911,991
Gross amounts offset in the consolidated balance sheets	[1]
Net amounts included in the consolidated balance sheets		911,991
Amounts not offset in the consolidated balance sheets but eligible for offsetting upon counterparty default	[2]	911,991
Net amounts

[1] Includes financial instruments subject to enforceable master netting provisions that are permitted to be offset to the extent an event of default has occurred.

[2] Includes the amount of cash collateral held/posted.