REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, actual amount	$ 816,041	$ 770,585
Total capital to risk weighted assets, actual ratio	12.46%	13.38%
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount	$ 523,943	$ 460,738
Total capital to risk weighted assets, required for capital adequacy purposes, ratio	8.00%	8.00%
Tier 1 capital to risk weighted assets, actual amount	$ 781,695	$ 734,755
Tier 1 capital to risk weighted assets, actual ratio	11.93%	12.76%
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	$ 393,141	$ 230,331
Tier 1 capital ratio of risk-weighted assets	6.00%	4.00%
Tier 1 capital to average adjusted assets, actual amount	$ 781,695	$ 734,755
Tier 1 capital to average adjusted assets, actual ratio	10.68%	10.62%
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount	$ 292,770	$ 276,744
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio	4.00%	4.00%
Common Equity Tier 1 capital to risk weighted assets, actual amount	$ 691,195
Common Equity Tier 1 capital to risk weighted assets, actual ratio	10.55%
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	$ 294,823
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio	4.50%
Union Bank & Trust [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, actual amount	$ 786,339	$ 744,269
Total capital to risk weighted assets, actual ratio	12.05%	12.98%
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount	$ 522,051	$ 458,717
Total capital to risk weighted assets, required for capital adequacy purposes, ratio	8.00%	8.00%
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount	$ 652,563	$ 573,397
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio	10.00%	10.00%
Tier 1 capital to risk weighted assets, actual amount	$ 751,992	$ 708,453
Tier 1 capital to risk weighted assets, actual ratio	11.52%	12.36%
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	$ 391,663	$ 229,273
Tier 1 capital ratio of risk-weighted assets	6.00%	4.00%
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount	$ 522,217	$ 343,909
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio	8.00%	6.00%
Tier 1 capital to average adjusted assets, actual amount	$ 751,992	$ 708,453
Tier 1 capital to average adjusted assets, actual ratio	10.31%	10.29%
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount	$ 291,752	$ 275,395
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, amount	$ 364,691	$ 344,243
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, ratio	5.00%	5.00%
Common Equity Tier 1 capital to risk weighted assets, actual amount	$ 751,992
Common Equity Tier 1 capital to risk weighted assets, actual ratio	11.52%
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	$ 293,747
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio	4.50%
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount	$ 424,301
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio	6.50%