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PARENT COMPANY FINANCIAL STATEMENTS - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income | $ 11,302 | $ 16,949 | $ 12,257 | $ 17,201 | $ 33,264 | $ 35,937 | $ 26,528 | $ 19,687 | $ 57,709 | $ 115,416 | $ 62,072
Adjustments to reconcile net income to net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |
Amortization of debt issuance cost |  |  |  |  |  |  |  |  | 247 | 704 | 727
Debt redemption costs |  |  |  |  |  |  |  |  | 0 | 2,737 | 0
Gain on sale of subsidiary |  |  |  |  |  |  |  |  | 0 | (3,694) | 0
Deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | (30,372) | 5,613 | 7,279
Loss on investments in alternative energy partnerships, net |  |  |  |  |  |  |  |  | 30,786 | 31,510 | 0
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 563,011 | 18,113 | (42,989)
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Loan purchases from bank and principal collections, net |  |  |  |  |  |  |  |  | 0 | (182,231) | (705,709)
Proceeds from sale of subsidiary |  |  |  |  |  |  |  |  | 0 | 259 | 0
Investments in alternative energy partnerships |  |  |  |  |  |  |  |  | (55,400) | (57,300) |
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | 151,858 | (2,318,286) | (2,256,550)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Net increase (decrease) in other borrowings |  |  |  |  |  |  |  |  | (68,000) | 68,000 | 0
Net proceeds from issuance of common stock |  |  |  |  |  |  |  |  | 0 | 175,078 | 0
Net proceeds from issuance of preferred stock |  |  |  |  |  |  |  |  | 0 | 120,255 | 110,873
Redemption of preferred stock |  |  |  |  |  |  |  |  | 0 | (42,000) | 0
Redemption of senior notes |  |  |  |  |  |  |  |  | 0 | (84,750) | 0
Payment of junior subordinated amortizing notes |  |  |  |  |  |  |  |  | (2,684) | (5,078) | (4,715)
Cash settlements of stock options |  |  |  |  |  |  |  |  | 0 | (359) | 0
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  | 2,043 | 0 | 501
Restricted stock surrendered due to employee tax liability |  |  |  |  |  |  |  |  | (6,824) | (4,436) | (2,254)
Dividend equivalents paid on stock appreciation rights |  |  |  |  |  |  |  |  | (810) | (742) | (699)
Dividends paid on common stock |  |  |  |  |  |  |  |  | (25,707) | (21,844) | (16,955)
Dividends paid on preferred stock |  |  |  |  |  |  |  |  | (20,451) | (19,630) | (9,446)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | (766,680) | 2,583,559 | 2,224,464
Net change in cash and cash equivalents |  |  |  |  |  |  |  |  | (51,811) | 283,386 | (75,075)
Cash and cash equivalents at beginning of year |  |  |  | 439,510 |  |  |  | 156,124 | 439,510 | 156,124 | 231,199
Cash and cash equivalents at end of year | 387,699 |  |  |  | 439,510 |  |  |  | 387,699 | 439,510 | 156,124
Banc of California, Inc. |  |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 57,709 | 115,416 | 62,072
Adjustments to reconcile net income to net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | (62,442) | (65,193) | (73,605)
Stock-based compensation expense |  |  |  |  |  |  |  |  | 2,520 | 5,080 | 3,173
Amortization of debt issuance cost |  |  |  |  |  |  |  |  | 247 | 704 | 727
Debt redemption costs |  |  |  |  |  |  |  |  | 0 | 2,737 | 0
Gain on sale of subsidiary |  |  |  |  |  |  |  |  | 0 | (3,694) | 0
Deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | 14,604 | 4,538 | (3,575)
Loss on investments in alternative energy partnerships, net |  |  |  |  |  |  |  |  | 8,493 | 31,510 | 0
Net change in other assets and liabilities |  |  |  |  |  |  |  |  | (12,957) | (14,972) | 39,769
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 8,174 | 76,126 | 28,561
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Loan purchases from bank and principal collections, net |  |  |  |  |  |  |  |  | 0 | 221 | 9
Proceeds from sale of subsidiary |  |  |  |  |  |  |  |  | 0 | 259 | 0
Investments in alternative energy partnerships |  |  |  |  |  |  |  |  | (3,712) | (57,149) | 0
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | (3,712) | (251,694) | (159,991)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Net increase (decrease) in other borrowings |  |  |  |  |  |  |  |  | (68,000) | 68,000 | 0
Net proceeds from issuance of common stock |  |  |  |  |  |  |  |  | 0 | 175,078 | 0
Net proceeds from issuance of preferred stock |  |  |  |  |  |  |  |  | 0 | 120,255 | 110,873
Net proceeds from issuance of long-term debt |  |  |  |  |  |  |  |  | 0 | 0 | 172,304
Redemption of preferred stock |  |  |  |  |  |  |  |  | 0 | (42,000) | 0
Redemption of senior notes |  |  |  |  |  |  |  |  | 0 | (84,750) | 0
Payment of junior subordinated amortizing notes |  |  |  |  |  |  |  |  | (2,684) | (5,078) | (4,715)
Cash settlements of stock options |  |  |  |  |  |  |  |  | 0 | (359) | 0
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  | 2,043 | 0 | 501
Restricted stock surrendered due to employee tax liability |  |  |  |  |  |  |  |  | (6,824) | (4,436) | (2,254)
Dividend equivalents paid on stock appreciation rights |  |  |  |  |  |  |  |  | (810) | (742) | (699)
Dividends paid on common stock |  |  |  |  |  |  |  |  | (25,707) | (21,844) | (16,955)
Dividends paid on preferred stock |  |  |  |  |  |  |  |  | (20,451) | (19,630) | (9,446)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | (122,433) | 184,494 | 249,609
Net change in cash and cash equivalents |  |  |  |  |  |  |  |  | (117,971) | 8,926 | 118,179
Cash and cash equivalents at beginning of year |  |  |  | $ 158,467 |  |  |  | $ 149,541 | 158,467 | 149,541 | 31,362
Cash and cash equivalents at end of year | $ 40,496 |  |  |  | $ 158,467 |  |  |  | 40,496 | 158,467 | 149,541
Banc of California, Inc. | Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Capital contribution to subsidiary |  |  |  |  |  |  |  |  | 0 | (195,000) | (160,000)
Banc of California, Inc. | Non-Bank Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Capital contribution to subsidiary |  |  |  |  |  |  |  |  | $ 0 | $ (25) | $ 0

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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow from (a) purchases of loans held-for-investment, (b) purchases of leases held-for-investment, and (c) both. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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