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Stockholders' Equity and Regulatory Requirements (Details) - Schedule of Compliance with Regulatory Capital Requirements - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	1.54%
Parent Company [Member]
Tier One Leverage Capital	$ 563,464	$ 478,876
Tier One Leverage Capital to Average Assets	9.54%	9.34%
Tier One Leverage Capital Required for Capital Adequacy	$ 236,259	$ 204,995
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized
Tier One Leverage Capital Required to be Well Capitalized to Average Assets
CET One Risk Based Capital	$ 558,309	$ 473,721
CET One Risk Based Capital to Risk Weighted Assets	9.95%	9.75%
CET One Risk Based Capital Required for Capital Adequacy	$ 252,439	$ 218,585
CET One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
CET One Risk Based Capital Required to be Well Capitalized
CET One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets
Tier One Risk Based Capital	$ 563,464	$ 478,876
Tier One Risk Based Capital to Risk Weighted Assets	10.04%	9.86%
Tier One Risk Based Capital Required for Capital Adequacy	$ 336,586	$ 291,446
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required to be Well Capitalized
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets
Capital	$ 726,757	$ 638,830
Capital to Risk Weighted Assets	12.96%	13.15%
Capital Required for Capital Adequacy	$ 448,781	$ 388,595
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized
Capital Required to be Well Capitalized to Risk Weighted Assets
Union Center National Bank [Member]
Tier One Leverage Capital	$ 637,824	$ 552,311
Tier One Leverage Capital to Average Assets	10.81%	10.78%
Tier One Leverage Capital Required for Capital Adequacy	$ 236,188	$ 204,973
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 295,235	$ 256,217
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
CET One Risk Based Capital	$ 637,824	$ 552,311
CET One Risk Based Capital to Risk Weighted Assets	11.37%	11.37%
CET One Risk Based Capital Required for Capital Adequacy	$ 252,432	$ 218,589
CET One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
CET One Risk Based Capital Required to be Well Capitalized	$ 364,625	$ 315,740
CET One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier One Risk Based Capital	$ 637,824	$ 552,311
Tier One Risk Based Capital to Risk Weighted Assets	11.37%	11.37%
Tier One Risk Based Capital Required for Capital Adequacy	$ 336,577	$ 291,452
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 448,769	$ 388,603
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Capital	$ 708,367	$ 619,515
Capital to Risk Weighted Assets	12.63%	12.75%
Capital Required for Capital Adequacy	$ 448,769	$ 388,603
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	$ 560,961	$ 485,754
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%

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