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Sale of Insurance Subsidiaries and Discontinued Operations - Summarized Financial Information of Discontinued Operations (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Jun. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Income before taxes |  | $ 0 | $ 0 |  | $ 0 | $ 37
Provision for income taxes |  | 0 | 0 |  | 0 | 481
Loss from discontinued operations, net of taxes |  | $ 0 | $ 0 |  | $ 0 | (444)
Discontinued Operations, Disposed of by Sale [Member] | Chun Ha and All World To Chunha Holdings Corporation [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 1,602 |  |  | $ 1,602 |  |
Premises and equipment, net | 90 |  |  | 90 |  |
Other intangible assets, net | 1,089 |  |  | 1,089 |  |
Other assets | 2,855 |  |  | 2,855 |  |
Total assets | 5,636 |  |  | 5,636 |  |
Income tax payable | 415 |  |  | 415 |  |
Accrued expenses and other liabilities | 1,878 |  |  | 1,878 |  |
Total liabilities | 2,293 |  |  | 2,293 |  |
Net assets of discontinued operations | 3,343 |  |  | 3,343 |  |
Noninterest loss | $ (14) |  |  |  |  | (14)
Gain on disposal |  |  |  |  |  | 51
Income before taxes |  |  |  |  |  | 37
Provision for income taxes |  |  |  |  |  | 481
Loss from discontinued operations, net of taxes |  |  |  | $ (444) |  | $ (444)

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