REGULATORY CAPITAL MATTERS (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Banc of California, Inc.
Total risk-based capital
Amount	$ 993,726	$ 975,918
Ratio	13.72%	13.70%
Amount	$ 579,613	$ 569,856
Ratio	8.00%	8.00%
Tier 1 risk-based capital
Amount	$ 947,772	$ 941,429
Ratio	13.08%	13.22%
Amount	$ 434,709	$ 427,392
Ratio	6.00%	6.00%
Common equity tier 1 capital
Amount	$ 678,701	$ 672,358
Ratio	9.37%	9.44%
Amount	$ 326,032	$ 320,544
Ratio	4.50%	4.50%
Tier 1 leverage
Amount	$ 947,772	$ 941,429
Ratio	8.51%	8.17%
Amount	$ 445,645	$ 460,840
Ratio	4.00%	4.00%
Banc of California, NA
Total risk-based capital
Amount	$ 1,091,813	$ 1,042,617
Ratio	15.11%	14.73%
Amount	$ 577,987	$ 566,405
Ratio	8.00%	8.00%
Amount	$ 722,484	$ 708,007
Ratio	10.00%	10.00%
Tier 1 risk-based capital
Amount	$ 1,045,859	$ 999,788
Ratio	14.48%	14.12%
Amount	$ 433,491	$ 424,804
Ratio	6.00%	6.00%
Amount	$ 577,987	$ 566,405
Ratio	8.00%	8.00%
Common equity tier 1 capital
Amount	$ 1,045,859	$ 999,788
Ratio	14.48%	14.12%
Amount	$ 325,118	$ 318,603
Ratio	4.50%	4.50%
Amount	$ 469,615	$ 460,204
Ratio	6.50%	6.50%
Tier 1 leverage
Amount	$ 1,045,859	$ 999,788
Ratio	9.43%	8.71%
Amount	$ 443,728	$ 459,368
Ratio	4.00%	4.00%
Amount	$ 554,660	$ 574,210
Ratio	5.00%	5.00%

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Tier One Risk Based Common Capital

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Tier One Risk Based Common Capital Required for Capital Adequacy

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Tier One Risk Based Common Capital Required for Capital Adequacy to Risk Weighted Assets

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Tier One Risk Based Common Capital Required to be Well Capitalized

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Tier One Risk Based Common Capital Required to be Well Capitalized to Risk Weighted Assets

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Tier One Risk Based Common Capital to Risk Weighted Assets

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The amount of total capital as defined in the regulations.

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The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Total Capital divided by risk weighted assets as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

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Tier 1 Risk Based Capital as defined in the regulations.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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Tier 1 capital divided by risk weighted assets as defined by regulations.

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