SUBORDINATED DEFERRABLE INTEREST DEBENTURES (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2006	Dec. 31, 2005
Preferred Stock and Debt [Line Items]
Trust Preferred Securities Interest Rate	3.13%
Preferred Stock, Value, Outstanding	$ 5,000,000
Long-term Debt, Gross	5,155,000
Preferred Stock, Value, Issued	$ 0	$ 0
First National Banc Statutory Trust I [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized					$ 5,000,000
Preferred Stock Spread Variable Dividend Rate					2.80%
Preferred Stock Maturity Period	30 years
Common Stock Held in Trust	$ 155,000
Prosperity Banking Capital Trust I [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized			$ 5,000,000
Preferred Stock Spread Variable Dividend Rate			2.57%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	3.17%
Preferred Stock, Value, Outstanding	$ 5,000,000
Long-term Debt, Gross	5,155,000
Common Stock Held in Trust	155,000
Subordinated Debt Obligations, Fair Value Disclosure	$ 3,260,000
Prosperity Banking Capital Trust II [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized			$ 4,500,000
Preferred Stock Spread Variable Dividend Rate			3.15%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	3.75%
Preferred Stock, Value, Outstanding	$ 4,500,000
Long-term Debt, Gross	4,640,000
Common Stock Held in Trust	140,000
Subordinated Debt Obligations, Fair Value Disclosure	$ 3,275,000
Prosperity Bank Statutory Trust III [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized			$ 10,000,000
Preferred Stock Spread Variable Dividend Rate			1.60%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	2.11%
Preferred Stock, Value, Outstanding	$ 10,000,000
Long-term Debt, Gross	10,310,000
Common Stock Held in Trust	310,000
Subordinated Debt Obligations, Fair Value Disclosure	$ 5,230,000
Prosperity Bank Statutory Trust IV [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized			$ 10,000,000
Preferred Stock Spread Variable Dividend Rate			1.54%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	2.05%
Preferred Stock, Value, Outstanding	$ 5,000,000
Long-term Debt, Gross	5,155,000
Common Stock Held in Trust	310,000
Subordinated Debt Obligations, Fair Value Disclosure	$ 2,730,000
Coastal Bankshares Statutory Trust One [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized		$ 5,000,000
Preferred Stock Spread Variable Dividend Rate		3.15%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	3.47%
Preferred Stock, Value, Outstanding	$ 5,000,000
Long-term Debt, Gross	5,155,000
Common Stock Held in Trust	155,000
Subordinated Debt Obligations, Fair Value Disclosure	$ 3,781,000
Coastal Bankshares Statutory Trust Two [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized		$ 10,000,000
Preferred Stock Spread Variable Dividend Rate		1.60%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	2.11%
Preferred Stock, Value, Outstanding	$ 10,000,000
Long-term Debt, Gross	10,310,000
Common Stock Held in Trust	310,000
Subordinated Debt Obligations, Fair Value Disclosure	5,747,000
Merchants & Southern Statutory Trust I [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized	$ 3,000,000
Preferred Stock Spread Variable Dividend Rate	1.90%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	2.43%
Preferred Stock, Value, Outstanding	$ 3,000,000
Long-term Debt, Gross	3,093,000
Common Stock Held in Trust	93,000
Subordinated Debt Obligations, Fair Value Disclosure	1,878,000
Merchants & Southern Statutory Trust II [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Value Authorized	$ 3,000,000
Preferred Stock Spread Variable Dividend Rate	1.50%
Preferred Stock Maturity Period	30 years
Trust Preferred Securities Interest Rate	2.01%
Preferred Stock, Value, Outstanding	$ 3,000,000
Long-term Debt, Gross	3,093,000
Common Stock Held in Trust	93,000
Subordinated Debt Obligations, Fair Value Disclosure	1,704,000
Ameris Statutory Trust I [Member]
Preferred Stock and Debt [Line Items]
Preferred Stock Spread Variable Dividend Rate				1.63%
Long-term Debt, Gross				$ 37,114,000
Common Stock Held in Trust	$ 1,114,000
Preferred Stock And Debt Rate Percentage	2.14%
Preferred Stock, Value, Issued				$ 36,000,000
Preferred Securities Maturity Date	Dec. 15, 2036