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Subsequent Events - Additional Information (Detail) (USD $)	6 Months Ended		0 Months Ended		0 Months Ended		0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jul. 20, 2014 Subsequent Event	Jul. 20, 2014 Subsequent Event	Aug. 06, 2014 Subsequent Event CresCom Bank Branch	Aug. 06, 2014 Subsequent Event CresCom Bank	Aug. 06, 2014 Subsequent Event CresCom Bank Southeastern, coastal region of North Carolina Branch	Aug. 06, 2014 Subsequent Event CresCom Bank South Carolina Branch
Subsequent Event [Line Items]
Number of branches sold					13		10	3
Total deposit of branches to be sold	$ 1,923,104,000	$ 1,950,742,000				$ 230,000,000
Total loans of branches to be sold	1,735,513,000	1,686,644,000				59,000,000
FHLB convertible advance, prepaid amount				35,000,000
FHLB convertible advance	50,000,000
FHLB convertible advance, due date	2017-05
FHLB convertible advance, interest rate	4.21%
FHLB convertible advance, prepayment pre-tax penalty			$ 3,050,000

X

- Definition

Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Due Date, Month and Year

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- Definition

Federal Home Loan Bank Advances General Debt Obligations Disclosures Penalties

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- Definition

Number Of Branches to be Sold

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- Definition

Prepayment Of Federal Home Loan Bank Advances

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- Definition

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 45

-Paragraph 1

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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-Name Regulation S-X (SX)

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States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.

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-Name Industry Guide

-Number 3

-Section VII

-Subsection 1

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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