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Securities - Trading Securities (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | $ 4,073 | $ 4,127
Corporate Equity Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | 2,680 | 2,705
Mutual Funds [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | 933 | 965
Certificates of Deposit [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | 254 | 253
Corporate Notes and Bonds [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | 152 | 152
U.S. Government Sponsored Entities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Trading securities | $ 54 | $ 52

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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 + Details
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