Debt instrument maturities month year.

No definition available.

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- References

No definition available.

+ Details

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Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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OTHER BORROWINGS [Parenthetical] (Details)	3 Months Ended
OTHER BORROWINGS [Parenthetical] (Details)	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Daily Rate Credit From Federal Home Loan Bank [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.51%
Revolving Credit Facility One [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Description of Variable Rate Basis	Advances under revolving credit agreement with a regional bank with interest at 90-day LIBOR plus 3.50% (3.78% at March 31, 2016, 3.92% at December 31, 2015 and 3.73% at March 31, 2015) due in August 2017, secured by subsidiary bank stock
Debt Instrument, Interest Rate, Effective Percentage	3.78%	3.92%	3.73%
Debt instrument, maturity period	August 31, 2017
Revolving Credit Facility Two [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	8.00%
Debt instrument, maturity period	January 31, 2017
Fixed Rate Advance One [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.81%
Maturity period of advances	Jul. 15, 2016
Fixed Rate Advance Two [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.40%
Maturity period of advances	Jan. 09, 2017
Fixed Rate Advance Three [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.23%
Maturity period of advances	May 30, 2017
Correspondent Bank Advances One [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.50%
Maturity period of advances	Nov. 27, 2017
Correspondent Bank Advances Two [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.25%
Maturity period of advances	Oct. 15, 2019
Subordinated Debt [Member]
Federal Home Loan Bank Borrowings By Year Of Maturity And Applicable Interest Rate [Line Items]
Debt Instrument, Description of Variable Rate Basis	Subordinated debt issued by The Prosperity Banking Company due September 2016 with an interest rate of 90-day LIBOR plus 1.75% (2.38% at March 31, 2016, 2.28% at December 31, 2015 and 2.02% at March 31, 2015)
Debt Instrument, Interest Rate, Effective Percentage	2.38%	2.28%	2.02%