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Income Taxes - Summary of loss carryforwards by jurisdiction (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | $ 8,877 | $ 10,020
Net operating loss carry-forwards, annual limitation | 1,143 | 1,143
Federal | Saehan Bank [Member] | Ownership Change [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 2,714 | 2,940
Net operating loss carry-forwards, annual limitation | 226 | 226
Federal | Korea First Bank of New York [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 494 | 991
Net operating loss carry-forwards, annual limitation | 497 | 497
Federal | Pacific International Bancorp, Inc. |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 5,669 | 6,089
Net operating loss carry-forwards, annual limitation | 420 | 420
State |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 2,714 | 2,940
Net operating loss carry-forwards, annual limitation | 226 | 226
State | Saehan Bank [Member] | Ownership Change [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 2,714 | 2,940
Net operating loss carry-forwards, annual limitation | 226 | 226
State | Korea First Bank of New York [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 0 | 0
Net operating loss carry-forwards, annual limitation | 0 | 0
State | Pacific International Bancorp, Inc. |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carry-forwards, remaining amount | 0 | 0
Net operating loss carry-forwards, annual limitation | $ 0 | $ 0

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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