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v3.19.3.a.u2

Acquisitions - Additional Information (Detail) - USD ($) |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Mar. 26, 2019 | Oct. 17, 2017 | Sep. 01, 2017 | Feb. 03, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Aug. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, shares outstanding |  |  |  |  | 44,975,771 | 38,375,407 |  |
Acquisition of goodwill | $ 31,200,000 |  |  |  | $ 151,238,000 | $ 119,880,000 | $ 119,880,000 |
Gain on remeasurement of equity interest |  |  |  |  | $ 530,000 |  |  |
Wolverine Bancorp Inc [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, shares outstanding |  |  | 2,129,331 |  |  |  |  |
Common stock issued |  | 3,241,045 |  |  |  |  |  |
Market closing price per share |  | $ 19.37 |  |  |  |  |  |
Estimated transaction value |  | $ 93,800,000 |  |  |  |  |  |
Costs related to the acquisition |  | 1,900,000 |  |  |  |  |  |
Total purchase price |  | 93,773,000 |  |  |  |  |  |
Net intangible assets acquired |  | 2,024,000 |  |  |  |  |  |
Acquisition of goodwill |  | $ 26,827,000 |  |  |  |  |  |
Core deposit intangible amortization period |  |  |  |  | 10 years |  |  |
Number of shares owned |  | 1.5228 |  |  |  |  |  |
Share of common stock outstanding per share |  |  | $ 14.00 |  |  |  |  |
Payments received as cash consideration |  |  |  |  |  |  | (12,723,000) |
Lafayette Community Bancorp [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Exchange ratio per share |  |  | 0.8817% |  |  |  |  |
Cash paid for each share |  |  | $ 1.73 |  |  |  |  |
Common stock, shares outstanding |  |  | 1,856,679 |  |  |  |  |
Common stock issued |  |  | 1,636,888 |  |  |  |  |
Market closing price per share |  |  |  |  |  |  |  | $ 17.45
Estimated transaction value |  |  |  |  |  |  |  | $ 34.5
Costs related to the acquisition |  |  | $ 1.7 |  |  |  |  |
Total purchase price |  |  | 34,465,000 |  |  |  |  |
Net intangible assets acquired |  |  | 2,085,000 |  |  |  |  |
Acquisition of goodwill |  |  | $ 15,408,000 |  |  |  |  |
Core deposit intangible amortization period |  |  |  |  |  | 10 years |  |
Ownership interest percentage |  |  | 5.00% |  |  |  |  |
Gain on remeasurement of equity interest |  |  |  |  |  |  | 530,000 |
Payments received as cash consideration |  |  |  |  |  |  | $ (20,425,000) |
Lafayette Community Bancorp [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of shares owned |  |  | 100 |  |  |  |  |
Share of common stock outstanding per share |  |  | $ 17.25 |  |  |  |  |
First Farmers Bank & Trust Co [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Net intangible assets acquired |  |  |  | $ 452,000,000 |  |  |  |
Core deposit intangible amortization period |  |  |  | 10 years |  |  |  |
Payments received as cash consideration |  |  |  | $ 11,000,000.0 |  |  |  |
Business acquisition, loans assumed |  |  |  | $ 3,400,000 |  |  |  |
Premium on deposits paid |  |  |  | 3.00% |  |  |  |
Business acquisition, customer deposit balances |  |  |  | $ 14,800,000 |  |  |  |
Salin Bancshares, Inc |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Exchange ratio per share | 23907.50% |  |  |  |  |  |  |
Cash paid for each share | $ 87,417.17 |  |  |  |  |  |  |
Common stock, shares outstanding | 275 |  |  |  |  |  |  |
Common stock issued | 6,563,697 |  |  |  |  |  |  |
Market closing price per share | $ 15.65 |  |  |  |  |  |  |
Estimated transaction value | $ 126,700,000 |  |  |  |  |  |  |
Costs related to the acquisition | 5,600,000 |  |  |  |  |  |  |
Total purchase price | 126,722,000 |  |  |  |  |  |  |
Net intangible assets acquired | 19,818,000 |  |  |  |  |  |  |
Acquisition of goodwill | $ 31,358,000 |  |  |  |  |  |  |
Payments received as cash consideration |  |  |  |  | $ (128,745,000) |  |  |

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