INVESTMENT SECURITIES (Details 4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 211,990	$ 292,561	$ 864,743	$ 473,062
Gross realized gains	2,836	5,554	6,803	9,958
Gross realized losses	0	0	125	0
Related tax expense	$ 1,192	$ 2,333	$ 2,808	$ 4,182