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v3.21.2

Goodwill and Other Intangible Assets - Other Intangible Assets, Textual (Details) - Core Deposits | 9 Months Ended
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Sep. 30, 2021
Premier Commercial Bancorp |
Finite-Lived Intangible Assets [Line Items] |
Useful life | 10 years
Puget Sound Bancorp |
Finite-Lived Intangible Assets [Line Items] |
Useful life | 10 years
Washington Banking Company |
Finite-Lived Intangible Assets [Line Items] |
Useful life | 10 years
Valley Community Bancshares |
Finite-Lived Intangible Assets [Line Items] |
Useful life | 10 years

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |