FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) - Corporate debt securities - Non-investment grade - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reconciliation of assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance		$ 6,717	$ 6,528	$ 6,371
Total gains or (losses) for the period:
Included in earnings	[1]		960
Included in other comprehensive income (unrealized)	[2]	1,209	922	1,643
Purchases, issues, sales, settlements:
Sales			(7,219)
Settlements		(9)	(98)	(97)
Transfers in and/or out of Level 3			$ (1,093)
Ending balance		$ 7,917		$ 7,917

[1] Realized gains or losses of corporate debt securities and embedded derivative liabilities are included in net gains on sales of investment securities and other operating expense, respectively, in the consolidated statements of income.

[2] Unrealized gains or losses on available-for-sale investment securities are reported in other comprehensive income, net of tax, in the consolidated statements of comprehensive income.