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Mergers and Acquisitions - Acquisition Related Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Business Acquisition [Line Items] |  |
Total merger and integration expenses | $ 947 | $ 1,207
Merger and Integration Expense |  |
Business Acquisition [Line Items] |  |
Total merger and integration expenses | 947 | 1,207
Merger and Integration Expense | Wilshire |  |
Business Acquisition [Line Items] |  |
Total merger and integration expenses | 401 | 1,183
Merger and Integration Expense | U & I Financial Corp [Member] |  |
Business Acquisition [Line Items] |  |
Total merger and integration expenses | 522 | 0
Merger and Integration Expense | Other |  |
Business Acquisition [Line Items] |  |
Total merger and integration expenses | $ 24 | $ 24

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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