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Regulatory Capital - Schedule of Actual Capital Amounts and Ratios and Selected Minimum Regulatory Thresholds (Details) - USD ($) $ in Millions | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Total risk-based capital: |  |
Actual Amount | $ 1,254.8 | $ 1,112.5
Actual Ratio | 12.75978% | 12.75962%
Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 971.1 | $ 806.5
Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 9.875% | 9.25%
Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 1,032.6 | $ 915.5
Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 10.50% | 10.50%
Well Capitalized Amount | $ 983.4 | $ 871.9
Well Capitalized Ratio | 10.00% | 10.00%
Tier 1 risk-based capital: |  |
Actual Amount | $ 1,181.2 | $ 1,040.3
Actual Ratio | 12.01132% | 11.93154%
Tier One Risk Based Capital under Basel III Phase-in Schedule | $ 774.5 | $ 632.1
Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 7.875% | 7.25%
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 835.9 | $ 741.1
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 8.50% | 8.50%
Well Capitalized Amount | $ 786.7 | $ 697.5
Well Capitalized Ratio | 8.00% | 8.00%
Common equity tier one risk-based capital: |  |
Actual Amount | $ 1,096.8 | $ 962.4
Actual Ratio | 11.15322% | 11.03808%
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 626.9 | $ 501.3
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 6.375% | 5.75%
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 688.4 | $ 610.3
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 7.00% | 7.00%
Well Capitalized Amount | $ 639.2 | $ 566.7
Well Capitalized Ratio | 6.50% | 6.50%
Leverage capital ratio: |  |
Actual Amount | $ 1,181.2 | $ 1,040.3
Actual Ratio | 9.72992% | 8.85532%
Adequately Capitalized Amount | $ 485.6 | $ 469.9
Adequately Capitalized Ratio | 4.00% | 4.00%
Well Capitalized Amount | $ 607.0 | $ 587.4
Well Capitalized Ratio | 5.00% | 5.00%
FIB |  |
Total risk-based capital: |  |
Actual Amount | $ 1,107.7 | $ 1,066.6
Actual Ratio | 12.28251% | 12.29128%
Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 890.5 | $ 802.7
Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 9.875% | 9.25%
Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 946.9 | $ 911.2
Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 10.50% | 10.50%
Well Capitalized Amount | $ 901.8 | $ 867.8
Well Capitalized Ratio | 10.00% | 10.00%
Tier 1 risk-based capital: |  |
Actual Amount | $ 1,034.0 | $ 994.4
Actual Ratio | 11.46631% | 11.45926%
Tier One Risk Based Capital under Basel III Phase-in Schedule | $ 710.2 | $ 629.1
Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 7.875% | 7.25%
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 766.5 | $ 737.6
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 8.50% | 8.50%
Well Capitalized Amount | $ 721.5 | $ 694.2
Well Capitalized Ratio | 8.00% | 8.00%
Common equity tier one risk-based capital: |  |
Actual Amount | $ 1,034.0 | $ 994.4
Actual Ratio | 11.46631% | 11.45926%
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 574.9 | $ 499.0
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 6.375% | 5.75%
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 631.3 | $ 607.4
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 7.00% | 7.00%
Well Capitalized Amount | $ 586.2 | $ 564.1
Well Capitalized Ratio | 6.50% | 6.50%
Leverage capital ratio: |  |
Actual Amount | $ 1,034.0 | $ 994.4
Actual Ratio | 8.76766% | 8.48004%
Adequately Capitalized Amount | $ 471.8 | $ 469.1
Adequately Capitalized Ratio | 4.00% | 4.00%
Well Capitalized Amount | $ 589.7 | $ 586.3
Well Capitalized Ratio | 5.00% | 5.00%
Inland Northwest Bank |  |
Total risk-based capital: |  |
Actual Amount | $ 77.6 |
Actual Ratio | 9.86329% |
Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 77.7 |
Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 9.875% |
Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 82.7 |
Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 10.50% |
Well Capitalized Amount | $ 78.7 |
Well Capitalized Ratio | 10.00% |
Tier 1 risk-based capital: |  |
Actual Amount | $ 77.6 |
Actual Ratio | 9.86329% |
Tier One Risk Based Capital under Basel III Phase-in Schedule | $ 62.0 |
Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 7.875% |
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 66.9 |
Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 8.50% |
Well Capitalized Amount | $ 63.0 |
Well Capitalized Ratio | 8.00% |
Common equity tier one risk-based capital: |  |
Actual Amount | $ 77.6 |
Actual Ratio | 9.86329% |
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule | $ 50.2 |
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Phase-in Schedule to Risk Weighted Assets | 6.375% |
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in | $ 55.1 |
Common Equity Tier One Capital Required for Capital Adequacy under Basel III Fully Phased-in to Risk Weighted Assets | 7.00% |
Well Capitalized Amount | $ 51.2 |
Well Capitalized Ratio | 6.50% |
Leverage capital ratio: |  |
Actual Amount | $ 77.6 |
Actual Ratio | 9.80699% |
Adequately Capitalized Amount | $ 31.7 |
Adequately Capitalized Ratio | 4.00% |
Well Capitalized Amount | $ 39.6 |
Well Capitalized Ratio | 5.00% |

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