Employee Benefit Plans (Assumed Benefit Obligations) (Details) (CommunityOne [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Carolina Fincorp, Inc. [Member] | Retired executive of acquiree [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Benefit amount per year	$ 30,000
Benefit payments, payable period	10 years
Integrity Financial Corporation [Member] | Former president of acquiree [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Benefit payments, payable period	10 years
Provision expense for future benefits	11,000	17,000	39,000
Payments made under provisions of the non-qualifying deferred compensation plan	71,000	78,000	80,000
Integrity Financial Corporation [Member] | Former president of acquiree [Member] | Other liabilities [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Non-qualifying deferred compensation plan liability	$ 18,000	$ 300,000