INVESTMENT SECURITIES AVAILABLE FOR SALE (Schedule of Securities with Continuous Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Approximate Fair Value
Less Than 12 Months	$ 154,568	$ 183,973
12 Months or Longer	99,807	17,364
Total	254,375	201,337
Unrealized Losses
Less Than 12 Months	(1,414)	(2,290)
12 Months or Longer	(2,265)	(601)
Total	(3,679)	(2,891)
U.S. Government-Sponsored Entities [Member]
Approximate Fair Value
Less Than 12 Months	32,166	21,517
12 Months or Longer	11,535
Total	43,701	21,517
Unrealized Losses
Less Than 12 Months	(317)	(474)
12 Months or Longer	(458)
Total	(775)	(474)
Mortgage-Backed Securities-Residential [Member]
Approximate Fair Value
Less Than 12 Months	116,774	151,114
12 Months or Longer	71,646	5,147
Total	188,420	156,261
Unrealized Losses
Less Than 12 Months	(1,000)	(1,472)
12 Months or Longer	(1,380)	(42)
Total	(2,380)	(1,514)
SBA Pool Securities [Member]
Approximate Fair Value
Less Than 12 Months
12 Months or Longer	5,205	6,713
Total	5,205	6,713
Unrealized Losses
Less Than 12 Months
12 Months or Longer	(57)	(65)
Total	(57)	(65)
State and Political Subdivisions [Member]
Approximate Fair Value
Less Than 12 Months	5,628	9,412
12 Months or Longer	3,760
Total	9,388	9,412
Unrealized Losses
Less Than 12 Months	(97)	(274)
12 Months or Longer	(32)
Total	(129)	(274)
Single-Issuer Trust Preferred Security [Member]
Approximate Fair Value
Less Than 12 Months
12 Months or Longer	2,837	2,610
Total	2,837	2,610
Unrealized Losses
Less Than 12 Months
12 Months or Longer	(162)	(389)
Total	(162)	(389)
CRA Investment Fund [Member]
Approximate Fair Value
Less Than 12 Months		1,930
12 Months or Longer	4,824	2,894
Total	4,824	4,824
Unrealized Losses
Less Than 12 Months		(70)
12 Months or Longer	(176)	(105)
Total	$ (176)	$ (175)