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Mergers and Acquisitions - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - Farmers Capital Bank Corporation [Member] - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Aug. 20, 2018
Business Acquisition [Line Items] |  |
Cash and due from banks |  | $ 230,139
Securities |  | 239,321
Loans |  | 1,025,800
Goodwill and other intangible assets |  | 263,296
Accrued income and other assets |  | 105,124
Total assets acquired |  | 1,863,680
Liabilities assumed |  |
Deposits |  | 1,330,328
Borrowings |  | 71,780
Accrued expenses and other liabilities |  | 32,671
Total liabilities assumed |  | 1,434,779
Fair value of net assets acquired |  | 205,597
Net assets acquired |  | $ 428,901
Purchase Price Allocation Adjustment [Member] |  |
Business Acquisition [Line Items] |  |
Goodwill | $ 220,897 |
Accrued income and other assets | 709 |
Liabilities assumed |  |
Accrued expenses and other liabilities | (3,116) |
Fair value of net assets acquired | (2,407) |
Increase in goodwill recognized | 2,407 |
Goodwill recognized | $ 223,304 |

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