SECURITIES - Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	$ 38,568	$ 227,076
Less than 12 months, Unrealized Losses	(173)	(1,268)
12 months or longer, Fair Value	9,068	53,428
12 months or longer, Unrealized Losses	(68)	(1,282)
Total Fair Value	47,636	280,504
Total Unrealized Losses	(241)	(2,550)
State and municipal
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	10,825	4,802
Less than 12 months, Unrealized Losses	(93)	(33)
12 months or longer, Fair Value		1,367
12 months or longer, Unrealized Losses		(35)
Total Fair Value	10,825	6,169
Total Unrealized Losses	(93)	(68)
Mortgage-backed securities-residential (Government Sponsored Entity)
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	10,175	168,950
Less than 12 months, Unrealized Losses	(3)	(644)
Total Fair Value	10,175	168,950
Total Unrealized Losses	(3)	(644)
Collateralized mortgage obligations (Government Sponsored Entity)
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	17,568	53,324
Less than 12 months, Unrealized Losses	(77)	(591)
12 months or longer, Fair Value	9,068	52,061
12 months or longer, Unrealized Losses	(68)	(1,247)
Total Fair Value	26,636	105,385
Total Unrealized Losses	$ (145)	$ (1,838)