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Summary of Significant Accounting Policies - Impact of ASC 326 (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | $ 7,840,873 |  | $ 7,545,748 |  |
Allowance for credit losses on loans | (96,336) | $ (84,272) | (73,658) | $ (69,943) | $ (69,944)
Liabilities: Reserve for Unfunded Commitments | (6,230) | (4,118) |  |  |
C & I Owner Occupied |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 114,138 | 89,490 |  |  |
Commercial |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 1,773,478 | 1,545,906 | 1,545,906 |  |
Allowance for credit losses on loans | (27,346) |  | (18,832) | (17,195) | (15,857)
Income Producing - Commercial Real Estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 3,827,024 | 3,702,747 | 3,702,747 |  |
Allowance for credit losses on loans | (43,551) |  | (29,265) | (26,765) | (28,034)
Owner Occupied - Commercial Real Estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 971,634 | 985,409 | 985,409 |  |
Allowance for credit losses on loans | (9,867) |  | (5,838) | (5,980) | (6,242)
Real Estate Mortgage Residential |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 104,558 | 104,221 | 104,221 |  |
Allowance for credit losses on loans | (1,369) |  | (1,557) | (681) | (965)
Construction - Commercial and Residential |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 969,166 | 1,035,754 | 1,125,244 |  |
Allowance for credit losses on loans | (13,341) |  | (17,485) | (18,469) | (18,175)
Construction - Commercial and Residential | C & I Owner Occupied |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 114,138 |  | 89,490 |  |
Home Equity |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 78,228 | 80,061 | 80,061 |  |
Allowance for credit losses on loans | (818) |  | (656) | (605) | (599)
Other Consumer |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 2,647 | 2,160 | 2,160 |  |
Allowance for credit losses on loans | (44) |  | $ (25) | $ (248) | $ (72)
Pre-ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for credit losses on loans |  | (73,658) |  |  |
Pre-ASC 326 Adoption | C & I Owner Occupied |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 89,490 |  |  |
Pre-ASC 326 Adoption | Commercial |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 1,545,906 |  |  |
Pre-ASC 326 Adoption | Income Producing - Commercial Real Estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 3,702,747 |  |  |
Pre-ASC 326 Adoption | Owner Occupied - Commercial Real Estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 985,409 |  |  |
Pre-ASC 326 Adoption | Real Estate Mortgage Residential |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 104,221 |  |  |
Pre-ASC 326 Adoption | Construction - Commercial and Residential |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 1,035,754 |  |  |
Pre-ASC 326 Adoption | Home Equity |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 80,061 |  |  |
Pre-ASC 326 Adoption | Other Consumer |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  | 2,160 |  |  |
Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for credit losses on loans |  | (10,614) |  |  |
Liabilities: Reserve for Unfunded Commitments |  | (4,118) |  |  |
ASU 2016-13 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liabilities: Reserve for Unfunded Commitments | $ (4,100) |  |  |  |
ASU 2016-13 | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liabilities: Reserve for Unfunded Commitments |  | $ (4,100) |  |  |

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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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