SECURITIES LENDING (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Securities borrowed
Gross amounts recognized		$ 730,022
Gross amounts offset in the consolidated balance sheets	[1]
Net amounts included in the consolidated balance sheets		730,022
Amounts not offset in the consolidated balance sheets but eligible for offsetting upon counterparty default	[2]	730,022
Net amounts
Securities loaned
Gross amounts recognized		728,201
Gross amounts offset in the consolidated balance sheets	[1]
Net amounts included in the consolidated balance sheets		728,201
Amounts not offset in the consolidated balance sheets but eligible for offsetting upon counterparty default	[2]	728,201
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.