Securities (Carrying Amount Of Securities And Approximate Fair Values) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Investment Securities [Line Items]
Available for sale securities, Amortized Cost	$ 81,318	$ 56,409
Available for sale securities, Unrealized Gains	1,479	1,061
Available for sale securities, Unrealized Losses	245	365
Available for sale securities, Fair Value	82,552	57,105
Held to maturity securities, Amortized Cost	12,824	12,950
Held to maturity securities, Unrealized Gains	676	712
Held to maturity securities, Unrealized Losses
Held to Maturity securities, Fair Value	13,500	13,662
State And Municipal Securities [Member]
Investment Securities [Line Items]
Available for sale securities, Amortized Cost	6,891	5,226
Available for sale securities, Unrealized Gains	384	267
Available for sale securities, Fair Value	7,275	5,493
Held to maturity securities, Amortized Cost	12,801	12,925
Held to maturity securities, Unrealized Gains	676	712
Held to maturity securities, Unrealized Losses
Held to Maturity securities, Fair Value	13,477	13,637
Mortgage-Backed Securities [Member]
Investment Securities [Line Items]
Available for sale securities, Amortized Cost	66,265	46,293
Available for sale securities, Unrealized Gains	1,068	755
Available for sale securities, Unrealized Losses	105	120
Available for sale securities, Fair Value	67,228	46,928
Held to maturity securities, Amortized Cost	23	25
Held to maturity securities, Unrealized Losses
Held to Maturity securities, Fair Value	23	25
Government Sponsored Enterprises [Member]
Investment Securities [Line Items]
Available for sale securities, Amortized Cost	5,943	1,933
Available for sale securities, Unrealized Gains	27	21
Available for sale securities, Unrealized Losses	23	2
Available for sale securities, Fair Value	5,947	1,952
Other Securities [Member]
Investment Securities [Line Items]
Available for sale securities, Amortized Cost	2,219	2,957
Available for sale securities, Unrealized Gains		18
Available for sale securities, Unrealized Losses	117	243
Available for sale securities, Fair Value	$ 2,102	$ 2,732

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

- Definition

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

+ References+ Details

- Definition

As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

+ References+ Details

- Definition

As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

+ References+ Details