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Purchased Loans - Narrative (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 USD ($) loan | Sep. 30, 2018 USD ($) loan | Dec. 31, 2018 USD ($)
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |
Allowance for loan losses attributable to restructured loans | $ 50,814,000 |  | $ 49,026,000
Purchased loans |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |
Modifications with subsequent default | $ 0 | $ 5,000 |
Number of restructured loans | loan | 2 | 3 |
Restructured loans discontinued past due period | 90 days | 90 days |
Remaining availability under commitments to lend additional funds on restructured loans | $ 5,000 | $ 2,000 |
Purchased loans | Nonaccruing Loans |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |
Outstanding balance of restructured loans | 272,000 | 503,000 |
Purchased loans | Restructured Loans |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |
Outstanding balance of restructured loans | 707,000 | 493,000 |
Allowance for loan losses attributable to restructured loans | $ 91,000 | $ 62,000 |

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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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