Available for sale securities continuous unrealized loss position aggregate losses accumulated in investments.

No definition available.

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- Definition

Collateral underlying mortgage investments terms.

+ References

No definition available.

+ Details

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563

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- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

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- Definition

This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

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- Definition

Fair value portion of investments accounted under the cost method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592

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- Definition

Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

+ References

No definition available.

+ Details

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- Definition

The cash inflow associated with the sale of debt securities classified as available-for-sale securities.

+ 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

-URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

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Securities - Additional Information (Detail) (USD $)	12 Months Ended
Securities - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Proceeds from sale of securities	$ 67,330,000	$ 256,102,000	$ 52,689,000
Gains from sale of securities	792,000	7,833,000	1,239,000
Gross losses	373,000	214,000	19,000
Collateral underlying mortgage investments terms	30- and 15-year fixed and 10/1 adjustable rate mortgage
Federal Home Loan Bank and Federal Reserve Bank stock	12,300,000
Fair value of cost method investment securities	12,300,000
Collateralized Mortgage Obligations of U.S. Government Sponsored Entities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Aggregate losses	14,747,000	994,000
Fair value of collateralized loan obligations	332,969,000	154,650,000
Private Collateralized Mortgage Obligations [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Aggregate losses	413,000	530,000
Fair value of collateralized loan obligations	47,653,000	39,190,000
Mortgage Backed Securities and Collateralized Mortgage Obligations of US Government Sponsored Entities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Aggregate losses	18,900,000
Fair value of collateralized loan obligations	401,400,000
Collateral Backed Securities Issued by Private Enterprises [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Aggregate losses	77,200,000
Fair value of collateralized loan obligations	0
Collateralized Loan Obligations [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Aggregate losses	413,000
Fair value of collateralized loan obligations	32,179,000
Carrying Amount [Member] \| Collateralized Mortgage Obligations of U.S. Government Sponsored Entities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities	105,655,000
Carrying Amount [Member] \| Private Collateralized Mortgage Obligations [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities	195,200,000
Fair Value [Member] \| Collateralized Mortgage Obligations of U.S. Government Sponsored Entities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities	105,655,000
Fair Value [Member] \| Private Collateralized Mortgage Obligations [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities	$ 195,200,000