REGULATORY CAPITAL REQUIREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Company (consolidated) [Member]
Total capital (to risk weighted assets):
Actual	$ 666,898	$ 589,811
Actual Ratio	13.15%	12.58%
Capital Required for Capital Adequacy	405,650	375,117
For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets):
Actual	551,836	505,646
Actual Ratio	10.88%	10.78%
For Capital Adequacy Purposes	202,825	187,558
For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 capital (to average assets):
Actual	551,836	505,646
Actual Ratio	8.84%	8.64%
For Capital Adequacy Purposes	249,825	234,153
For Capital Adequacy Purposes Ratio	4.00%	4.00%
Bank [Member]
Total capital (to risk weighted assets):
Actual	607,100	582,599
Actual Ratio	11.98%	12.42%
Capital Required for Capital Adequacy	405,465	375,205
For Capital Adequacy Purposes Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions	506,831	469,006
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets):
Actual	527,038	498,434
Actual Ratio	10.40%	10.63%
For Capital Adequacy Purposes	202,732	187,603
For Capital Adequacy Purposes Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions	304,099	281,404
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%	6.00%
Tier 1 capital (to average assets):
Actual	527,038	498,434
Actual Ratio	8.44%	8.51%
For Capital Adequacy Purposes	249,788	234,154
For Capital Adequacy Purposes Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Correction Action Provisions	$ 312,235	$ 292,692
To Be Well Capitalized Under Prompt Correction Action Provisions Ratio	5.00%	5.00%