Investment Securities - Additional Information (Detail) - USD ($) |
Jun. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Investments Debt And Equity Securities [Abstract] | ||
| Securities classified as trading securities | $ 0 | $ 0 |
| Held to maturity securities with gross unrealized losses | $ 0 | $ 160,000 |
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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity in a continuous loss position. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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