Employee Benefit Plans (SERP) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) plan employee	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan	3
Change in Benefit Obligation
Benefit obligation at beginning of year	$ 18,000	$ 263,000
Service cost	0	0	$ 0
Interest cost	0	11,000	84,000
Amendments to plan	0	0
Net actuarial loss	0	(185,000)
Benefits paid	(18,000)	(71,000)
Benefit obligation at end of year	0	18,000	263,000
Change in Plan Assets
Employer contributions	18,000	71,000
Benefits paid	(18,000)	(71,000)
Fair value of plan assets at end of year	0	0
Funded Status at End of Year	0	(18,000)
Amounts Recognized in the Consolidated Balance Sheets
Other Liabilities	0	18,000
Amounts Recognized in Accumulated Other Comprehensive Income
Net actuarial loss	0	0
Prior service cost	0	0
Net amount recognized	$ 0	$ 0
Weighted-Average Plan Assumptions at End of Year
Discount rate	0.00%	0.00%
Net Periodic Benefit Cost/(Income)
Service cost	$ 0	$ 0	0
Interest cost	0	11,000	84,000
Amortization of prior service cost	0	0	155,000
Amortization of net actuarial loss	0	0	(1,015,000)
Net periodic benefit cost	0	11,000	(776,000)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net actuarial loss/(gain)	0	0	1,002,000
Amortization of prior service credit	0	0	(155,000)
Total recognized in other comprehensive loss/(income)	0	0	847,000
Total Recognized in Net Periodic Pension Cost and Other Comprehensive Loss	$ 0	11,000	71,000
CommunityOne [Member] | Carolina Fincorp, Inc. [Member] | Retired Executive of Acquiree [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retired executives covered under plan | employee	1
Benefit amount per year	$ 30,000
Benefit payments, payable period	10 years
CommunityOne [Member] | Integrity Financial Corporation [Member] | Former President of Acquiree [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit payments, payable period	10 years
Provision expense for future benefits	$ 0	11,000	17,000
Payments made under provisions of the non-qualifying deferred compensation plan	18,000	71,000	$ 78,000
Other Liabilities [Member] | CommunityOne [Member] | Integrity Financial Corporation [Member] | Former President of Acquiree [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-qualifying deferred compensation plan liability	$ 0	$ 18,000