Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Tier I capital (to average assets), Amount [Abstract]
Actual Amount	$ 468,304	$ 439,877
For Capital Adequacy Purposes	$ 151,066	$ 146,139
Tier I capital (to average assets), Ratio [Abstract]
Actual Ratio	12.40%	12.04%
For Capital Adequacy Purposes	4.00%	4.00%
Common equity Tier 1 capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 468,304
For Capital Adequacy Purposes	$ 144,538
Common equity Tier 1 capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	14.58%
For Capital Adequacy Purposes	4.50%
Tier I capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 468,304	$ 439,877
For Capital Adequacy Purposes	$ 168,253	$ 106,572
Tier I capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	16.70%	16.51%
For Capital Adequacy Purposes	6.00%	4.00%
Total capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 503,296	$ 473,097
For Capital Adequacy Purposes	$ 224,310	$ 213,107
Total capital (to risk-weighted assets), Ratio [Abstract]
Actual Ratio	17.95%	17.76%
For Capital Adequacy Purposes	8.00%	8.00%
Community Trust Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum dividend without Approval	$ 50,000
Tier I capital (to average assets), Amount [Abstract]
Actual Amount	445,107	$ 416,861
For Capital Adequacy Purposes	150,374	145,374
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 187,967	$ 181,718
Tier I capital (to average assets), Ratio [Abstract]
Actual Ratio	11.84%	11.47%
For Capital Adequacy Purposes	4.00%	4.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	5.00%	5.00%
Common equity Tier 1 capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 445,107
For Capital Adequacy Purposes	125,895
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 181,848
Common equity Tier 1 capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	15.91%
For Capital Adequacy Purposes	4.50%
To Be Well-Capitalized Under Prompt Corrective Action Provision	6.50%
Tier I capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 445,107	$ 416,861
For Capital Adequacy Purposes	167,859	106,274
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 223,812	$ 159,411
Tier I capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	15.91%	15.69%
For Capital Adequacy Purposes	6.00%	4.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	8.00%	6.00%
Total capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 480,099	$ 450,081
For Capital Adequacy Purposes	223,822	212,553
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 279,778	$ 265,691
Total capital (to risk-weighted assets), Ratio [Abstract]
Actual Ratio	17.16%	16.94%
For Capital Adequacy Purposes	8.00%	8.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	10.00%	10.00%