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Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |
Balance at beginning of period | $ 79,749 | $ 54,042
Acquisitions | 68,855 | 25,707
Balance at end of period | 148,604 | 79,749
Metropolitan Banks [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period | 13,767 | 8,078
Acquisitions |  | 5,689
Balance at end of period | 13,767 | 13,767
Community Banks [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period | 59,894 | 39,876
Acquisitions |  | 20,018
Balance at end of period | 59,894 | 59,894
Pegasus Bank [Member] |  |
Goodwill [Line Items] |  |
Acquisitions | 68,855 |
Balance at end of period | 68,855 |
Other Financial Services [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period | 5,464 | 5,464
Balance at end of period | 5,464 | 5,464
Executive, Operations & Support [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period | 624 | 624
Balance at end of period | $ 624 | $ 624

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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