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Pending Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Business Acquisition [Line Items]
Common stock number of shares issued for consideration	2,000,000
Amount of cash consideration	$ 220,000,000
Period used to determine volume weighted average price of shares issued in the merger	10 days
Targeted Shareholders' Equity At Closing	87,000,000
Other	$ 38,624,000	$ 41,485,000
Jack Wood [Member]
Business Acquisition [Line Items]
Holding period of common stock received in merger	1 year
Donald Wood [Member]
Business Acquisition [Line Items]
Holding period of common stock received in merger	6 months

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Period used to determine volume weighted average price of shares issued in the merger

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Targeted Shareholders' Equity At Closing

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Number of shares of equity interests issued or issuable to acquire entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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Other noninterest expenses that are not separately presented in any other noninterest expense category.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14)

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



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