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Note 2 - Acquisition Activity (Details Textual) - AJS Bancorp, Inc [Member] $ / shares in Units, $ in Thousands | Jan. 24, 2019 USD ($) $ / shares shares | Jan. 23, 2019 USD ($)
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Business Acquisition, Number of Shares Given Per Share of Acquired Company, Stockholders Holding 100 Shares or More (in shares) | 0.2030 |
Business Acquisition, Cash Paid Per Share of Acquired Company, Stockholders Holding 100 or More Shares (in dollars per share) | $ / shares | $ 7.20 |
Business Acquisition, Cash Paid Per Share of Acquired Company, Holding Less Than 100 Shares (in dollars per share) | $ / shares | $ 16.00 |
Business Acquisition, Number of Shares Given Per Share of Acquired Company, Less Than 100 Shares (in shares) | 0 |
Business Acquisition, Fractional Shares Multiplier (in dollars per share) | $ / shares | $ 43.01 |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | 416,478 |
Payments to Acquire Businesses, Net of Cash Acquired, Total | $ |  | $ 15,700
Business Combination, Consideration Transferred, Total | $ | $ 33,235 | 33,200
Business Acquisition, Transaction Costs | $ |  | $ 2,100
Number of Banking Centers |  | 22
Maximum [Member] |  |
Business Acquisition, Number of Held Shares of Acquired Company (in shares) | 100 |

X
- Definition The amount of cash paid per share of the acquired company held by shareholders' with less than 100 shares + References No definition available. + Details
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X
- Definition The amount of cash paid per share of the acquired company held by shareholders', if holding 100 shares or more. + References No definition available. + Details
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- Definition The amount multiplied by each fractional share given. + References No definition available. + Details
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- Definition The number of shares held of the acquired company by stockholder. + References No definition available. + Details
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- Definition The number of shares given per share to each shareholder with less than 100 shares of the acquired company held. + References No definition available. + Details
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- Definition The number of shares given to each shareholder per share of the acquired company held, if holding 100 or more shares. + References No definition available. + Details
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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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