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Loan Servicing Rights - Components of Loan Servicing Rights and Valuation Allowance (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Servicing asset: |  |  |  |  |
Balance at beginning of period | $ 38,246 | $ 28,262 | $ 30,085 | $ 28,124 |
Additions | 1,347 | 3,058 | 11,013 | 6,171 |
Amortization | (1,472) | (2,434) | (2,977) | (5,409) |
Balance before valuation allowance at end of period | 38,121 | 28,886 | 38,121 | 28,886 |
Valuation allowance: |  |  |  |  |
Balance at beginning of period | (1) | (146) | (46) | (1,407) |
(Additions)/recoveries | 1 | 41 | 46 | 1,302 |
Balance at end of period | 0 | (105) | 0 | (105) |
Loan servicing rights, net | $ 38,121 | $ 28,781 | 38,121 | $ 28,781 | $ 30,000
First Midwest |  |  |  |  |
Servicing asset: |  |  |  |  |
Additions |  |  | $ 7,700 |  |

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- Definition Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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- Definition Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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