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Acquisitions - Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30 (Detail) - USD ($) $ in Thousands | Jul. 18, 2016 | Jun. 01, 2016
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LaPorte Bancorp Inc [Member] |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |
Contractually required principal and interest at acquisition | $ 12,545 |
Contractual cash flows not expected to be collected (nonaccretable differences) | 4,492 |
Expected cash flows at acquisition | 8,053 |
Interest component of expected cash flows (accretable discount) | 1,258 |
Fair value of acquired loans accounted for under ASC 310-30 | $ 6,795 |
Kosciusko Financial Inc [Member] |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |
Contractually required principal and interest at acquisition |  | $ 2,682
Contractual cash flows not expected to be collected (nonaccretable differences) |  | 25
Expected cash flows at acquisition |  | 2,657
Interest component of expected cash flows (accretable discount) |  | 634
Fair value of acquired loans accounted for under ASC 310-30 |  | $ 2,023

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- Definition Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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