REGULATORY MATTERS (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Bank [Member]
Tier 1 capital to average total assets [Abstract]
Tier 1 capital, Amount		$ 591,380	$ 521,458
For capital adequacy purposes, Amount	[1]	256,071	235,232
To be categorized as well capitalized, Amount	[1]	$ 320,089	$ 294,041
Tier 1 capital, Ratio		9.32%	8.95%
For capital adequacy purposes, Ratio	[1]	4.00%	4.00%
To be categorized as well capitalized, Ratio	[1]	5.00%	5.00%
Common equity tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount		$ 591,380	$ 521,458
For capital adequacy purposes, Amount	[1]	214,984	202,337
To be categorized as well capitalized, Amount	[1]	$ 310,532	$ 292,265
Actual, Ratio		12.38%	11.60%
For capital adequacy purposes, Ratio	[1]	4.50%	4.50%
To be categorized as well capitalized, Ratio	[1]	6.50%	6.50%
Tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount		$ 591,380	$ 521,458
For capital adequacy purposes, Amount	[1]	286,645	269,783
To be categorized as well capitalized, Amount	[1]	$ 382,194	$ 359,711
Actual, Ratio		12.38%	11.60%
For capital adequacy purposes, Ratio	[1]	6.00%	6.00%
To be categorized as well capitalized, Ratio	[1]	8.00%	8.00%
Total capital to risk-weighted assets [Abstract]
Actual, Amount		$ 612,858	$ 542,019
For capital adequacy purposes, Amount	[1]	382,194	359,711
To be categorized as well capitalized, Amount	[1]	$ 477,742	$ 449,639
Actual, Ratio		12.83%	12.05%
For capital adequacy purposes, Ratio	[1]	8.00%	8.00%
To be categorized as well capitalized, Ratio	[1]	10.00%	10.00%
Consolidated Company [Member]
Tier 1 capital to average total assets [Abstract]
Tier 1 capital, Amount		$ 546,571	$ 516,170
For capital adequacy purposes, Amount	[1]	256,029	235,402
To be categorized as well capitalized, Amount	[2]
Tier 1 capital, Ratio		8.61%	10.03%
For capital adequacy purposes, Ratio	[1]	4.00%	4.00%
To be categorized as well capitalized, Ratio	[2]
Common equity tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount		$ 546,571	$ 516,170
For capital adequacy purposes, Amount	[1]	215,424	203,104
To be categorized as well capitalized, Amount	[2]
Actual, Ratio		11.42%	11.44%
For capital adequacy purposes, Ratio	[1]	4.50%	4.50%
To be categorized as well capitalized, Ratio	[2]
Tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount		$ 546,571	$ 584,684
For capital adequacy purposes, Amount	[1]	287,232	270,806
To be categorized as well capitalized, Amount	[2]
Actual, Ratio		11.42%	12.95%
For capital adequacy purposes, Ratio	[1]	6.00%	6.00%
To be categorized as well capitalized, Ratio	[2]
Total capital to risk-weighted assets [Abstract]
Actual, Amount		$ 683,049	$ 605,245
For capital adequacy purposes, Amount	[1]	382,976	361,074
To be categorized as well capitalized, Amount	[2]
Actual, Ratio		14.27%	13.41%
For capital adequacy purposes, Ratio	[1]	8.00%	8.00%
To be categorized as well capitalized, Ratio	[2]

[1] In accordance with the Basel III rules.

[2] In accordance with the Basel III rules. Not applicable.