Credit Quality Assessment (Troubled Debt Restructured Loans for Specific Segments of the Loan Portfolio) (Detail) (Troubled Debt Restructuring, USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Financing Receivable Modifications [Line Items]
Restructured accruing	$ 0	$ 1,359,000
Restructured non-accruing	642,000	284,000
Balance	642,000	1,643,000
Specific allowance	152,000	99,000
Restructured and subsequently defaulted	0	0
Commercial
Financing Receivable Modifications [Line Items]
Restructured accruing	0	75,000
Restructured non-accruing	0	92,000
Balance	0	167,000
Specific allowance	0	99,000
Restructured and subsequently defaulted	0	0
All Other
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	0	0
Balance	0	0
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment \| Commercial Acquisition, Development and Construction
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	0	192,000
Balance	0	192,000
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment \| Commercial Investor Real Estate
Financing Receivable Modifications [Line Items]
Restructured accruing	0	1,284,000
Restructured non-accruing	0	0
Balance	0	1,284,000
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment \| Commercial Owner Occupied Real Estate
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	642,000	0
Balance	642,000	0
Specific allowance	152,000	0
Restructured and subsequently defaulted	$ 0	$ 0

- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

No definition available.

+ Details

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months.

+ References

No definition available.

+ Details

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which restructured accruing.

+ References

No definition available.

+ Details

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which restructured non accruing.

+ References

No definition available.

+ Details

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for specific allowance.

+ References

No definition available.

+ Details

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