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Basis of presentation and summary of significant accounting policies (Policies) | 9 Months Ended
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Sep. 30, 2018
Accounting Policies |
Consolidation Policy Text Block | Basis of Presentation The consolidated interim financial statements have been prepared without audit. The consolidated statement of financial condition data at December 31, 2017 was derived from audited financial statements. The unaudited interim financial statements are, in the opinion of management, a fair statement of the results for the periods reported and include all necessary adjustments, all of a normal recurring n ature, for a fair statement of such results. Certain reclassifications have been made to the 2017 Consolidated Financial Statements and notes to the financial statements to conform to the 2018 presentation. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted from the unaudited financial statements pursuant to the rules and regulations of t he Securities and Exchange Commission. Accordingly, these financial statements should be read in conjunction with the audited C onsolidated F inancial S tatements of the Corporation for the year ended December 31, 2017, included in the Corporation’s 2017 Form 10-K. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a f ull year or any future period.
Use of estimates | Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and contingent assets and liab ilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Business combinations | Business Combination The Corporation determined that the acquisition of certain assets and assumption of certain liabilities in connection with the Reliable Transaction constitutes a business combination as defined by the Financial Accounting Standards Board (“FASB”) Accounting Standards Codificat ion (“ASC”) Topic 805 “Business Combinations”. The assets and liabilities, both tangible and intangible, were initially recorded at their estimated fair values. Fair values were determined based on the requirements of FASB ASC Topic 820 “Fair Valu e Measurements”. These fair value estimates are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair value becomes available. Acquisition-related costs are expensed as incurred. Refer to Note 4, Business c ombination, for additional information of assets acquired and liabilities assumed in connection with th e T ransaction.

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- Definition Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 05 -Paragraph 4 -Subparagraph (a)-(d) -URI http://asc.fasb.org/extlink&oid=6909625&loc=d3e227-128457 + Details
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- Definition Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84161450&loc=d3e5614-111684 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.3A-03) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355100-122828 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.3A-02) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355033-122828 + Details
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- Definition Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6061-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6143-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6132-108592 + Details
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