REGULATORY CAPITAL REQUIREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Company (consolidated) [Member]
Total capital (to risk weighted assets):
Actual	$ 541,119	$ 485,688
Actual Ratio	12.23%	12.78%
Capital Required for Capital Adequacy	354,086	304,097
For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets):
Actual	458,638	408,157
Actual Ratio	10.36%	10.74%
For Capital Adequacy Purposes	177,043	152,049
For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 capital (to average assets):
Actual	458,638	408,157
Actual Ratio	8.65%	8.61%
For Capital Adequacy Purposes	212,015	189,576
For Capital Adequacy Purposes Ratio	4.00%	4.00%
Bank [Member]
Total capital (to risk weighted assets):
Actual	534,182	462,715
Actual Ratio	12.07%	12.17%
Capital Required for Capital Adequacy	353,965	304,066
For Capital Adequacy Purposes Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions	442,456	380,082
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets):
Actual	451,701	385,189
Actual Ratio	10.21%	10.13%
For Capital Adequacy Purposes	176,983	152,033
For Capital Adequacy Purposes Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions	265,474	228,049
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%	6.00%
Tier 1 capital (to average assets):
Actual	451,701	385,189
Actual Ratio	8.52%	8.12%
For Capital Adequacy Purposes	212,074	189,698
For Capital Adequacy Purposes Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Correction Action Provisions	$ 265,093	$ 237,123
To Be Well Capitalized Under Prompt Correction Action Provisions Ratio	5.00%	5.00%