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Regulatory Matters - Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Regulated Operations [Abstract] |  |
Trust-preferred securities included in Tier 1 capital | $ 25.0 | $ 25.0
Additional dividends without obtaining prior approval from bank regulators declared and paid | $ 152.5 |

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- Definition Additional dividends without obtaining prior approval from bank regulators declared and paid. + References No definition available. + Details
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- Definition Trust preferred securities included in tier one capital. + References No definition available. + Details
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- References No definition available. + Details
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