Mergers and Acquisitions - Pro Forma Combined Condensed Consolidated Financial Information (Details) - Metropolitan Bancgroup, Inc. - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Net interest income - pro forma	$ 89,240	$ 83,829
Net income - pro forma	$ 33,826	$ 26,677
Earnings per share - pro forma:
Basic (usd per share)	$ 0.69	$ 0.59
Diluted (usd per share)	$ 0.68	$ 0.58

Business Acquisition, Pro Forma Net Interest Income

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+ References

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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