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Regulatory Capital Requirements (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier One Capital Required for Capital Adequacy | $ 203,314 | $ 211,110
Common Equity Tier One Capital Required for Capital Adequacy to Average Assets | 4.50% | 4.50%
Common Equity Tier One Capital | $ 555,644 | $ 541,154
Common Equity Tier One Capital to Average Assets | 12.30% | 11.50%
Tier One Leverage Capital Required for Capital Adequacy | $ 256,216 | $ 212,578
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 0.040 | 0.040
Tier One Leverage Capital | $ 576,531 | $ 561,749
Tier One Leverage Capital to Average Assets | 0.090 | 0.106
Tier One Risk Based Capital Required for Capital Adequacy | $ 271,086 | $ 281,479
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 0.060 | 0.060
Tier One Risk Based Capital | $ 576,531 | $ 561,749
Tier One Risk Based Capital to Risk Weighted Assets | 0.128 | 0.120
Capital Required for Capital Adequacy | $ 361,448 | $ 375,306
Capital Required for Capital Adequacy to Risk Weighted Assets | 0.080 | 0.080
Capital | $ 633,061 | $ 598,226
Capital to Risk Weighted Assets | 0.140 | 0.128
Capital Conservation Buffer, Company | 6.00% |
Capital Conservation Buffer, Bank | 5.70% |
Heritage Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier One Capital Required for Capital Adequacy | $ 203,112 | $ 211,017
Common Equity Tier One Capital Required for Capital Adequacy to Average Assets | 4.50% | 4.50%
Common Equity Tier One Capital Required to be Well-Capitalized | $ 293,383 | $ 304,803
Common Equity Tier One Capital Required to be Well Capitalized to Average Assets | 6.50% | 6.50%
Common Equity Tier One Capital | $ 563,630 | $ 538,560
Common Equity Tier One Capital to Average Assets | 12.50% | 11.50%
Tier One Leverage Capital Required for Capital Adequacy | $ 256,051 | $ 211,187
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 0.040 | 0.040
Tier One Leverage Capital Required to be Well Capitalized | $ 320,064 | $ 263,984
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 0.050 | 0.050
Tier One Leverage Capital | $ 563,630 | $ 538,560
Tier One Leverage Capital to Average Assets | 0.088 | 0.102
Tier One Risk Based Capital Required for Capital Adequacy | $ 270,815 | $ 281,356
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 0.060 | 0.060
Tier One Risk Based Capital Required to be Well Capitalized | $ 361,087 | $ 375,142
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 0.080 | 0.080
Tier One Risk Based Capital | $ 563,630 | $ 538,560
Tier One Risk Based Capital to Risk Weighted Assets | 0.125 | 0.115
Capital Required for Capital Adequacy | $ 361,087 | $ 375,142
Capital Required for Capital Adequacy to Risk Weighted Assets | 0.080 | 0.080
Capital Required to be Well Capitalized | $ 451,359 | $ 468,927
Capital Required to be Well Capitalized to Risk Weighted Assets | 0.100 | 0.100
Capital | $ 620,124 | $ 575,037
Capital to Risk Weighted Assets | 0.137 | 0.123

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