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LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowance for Loan Losses and Recorded Investment Excluding Accrued Interest in Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | $ 62,192 |  |  |  | $ 49,333 | $ 62,192 | $ 49,333 | $ 40,444 |  |
Charge-offs |  |  |  |  |  |  |  |  | (41,766) | (18,499) | (5,581) |  |
Recoveries |  |  |  |  |  |  |  |  | 836 | 1,143 | 771 |  |
Net charge-offs |  |  |  |  |  |  |  |  | (40,930) | (17,356) | (4,810) |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses | $ (2,678) | $ 38,540 | $ (1,987) | 2,512 | $ 6,653 | $ 1,410 | $ 2,653 | 19,499 | 36,387 | 30,215 | 13,699 |  |
Balance at end of year | 57,649 |  |  |  | 62,192 |  |  |  | 57,649 | 62,192 | 49,333 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | $ 5,990 | $ 829
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 51,659 | 61,363
Total ending allowance balance | 57,649 |  |  | 62,192 | 62,192 |  |  | 49,333 | 57,649 | 49,333 | 40,444 | 57,649 | 62,192
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 49,708 | 26,945
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 5,902,177 | 7,673,928
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 5,951,885 | 7,700,873
Commercial | Commercial and industrial |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 18,191 |  |  |  | 14,280 | 18,191 | 14,280 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (36,787) | (1,927) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 138 | 396 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | (36,649) | (1,531) |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | 40,811 | 5,442 |  |  |
Balance at end of year | 22,353 |  |  |  | 18,191 |  |  |  | 22,353 | 18,191 | 14,280 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 3,367 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 18,986 | 18,191
Total ending allowance balance | 22,353 |  |  | 18,191 | 18,191 |  |  | 14,280 | 22,353 | 14,280 | 14,280 | 22,353 | 18,191
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 20,236 | 5,455
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 1,671,034 | 1,938,687
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 1,691,270 | 1,944,142
Commercial | Commercial real estate |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 6,674 |  |  |  | 4,971 | 6,674 | 4,971 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | (733) | 1,703 |  |  |
Balance at end of year | 5,941 |  |  |  | 6,674 |  |  |  | 5,941 | 6,674 | 4,971 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 5,941 | 6,674
Total ending allowance balance | 5,941 |  |  | 6,674 | 6,674 |  |  | 4,971 | 5,941 | 4,971 | 4,971 | 5,941 | 6,674
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 818,817 | 867,013
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 818,817 | 867,013
Commercial | Multifamily |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 17,970 |  |  |  | 13,265 | 17,970 | 13,265 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (6) | (14) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | (6) | (14) |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | (6,559) | 4,719 |  |  |
Balance at end of year | 11,405 |  |  |  | 17,970 |  |  |  | 11,405 | 17,970 | 13,265 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 11,405 | 17,970
Total ending allowance balance | 11,405 |  |  | 17,970 | 17,970 |  |  | 13,265 | 11,405 | 13,265 | 13,265 | 11,405 | 17,970
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 1,494,528 | 2,241,246
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 1,494,528 | 2,241,246
Commercial | SBA |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 1,827 |  |  |  | 1,701 | 1,827 | 1,701 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (2,121) | (1,927) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 217 | 273 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | (1,904) | (1,654) |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | 3,197 | 1,780 |  |  |
Balance at end of year | 3,120 |  |  |  | 1,827 |  |  |  | 3,120 | 1,827 | 1,701 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 2,045 | 562
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 1,075 | 1,265
Total ending allowance balance | 3,120 |  |  | 1,827 | 1,827 |  |  | 1,701 | 1,827 | 1,827 | 1,701 | 3,120 | 1,827
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 5,136 | 2,376
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 65,845 | 66,365
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 70,981 | 68,741
Commercial | Construction |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 3,461 |  |  |  | 3,318 | 3,461 | 3,318 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (371) | 0 |  |  |
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | (371) | 0 |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | 816 | 143 |  |  |
Balance at end of year | 3,906 |  |  |  | 3,461 |  |  |  | 3,906 | 3,461 | 3,318 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 3,906 | 3,461
Total ending allowance balance | 3,906 |  |  | 3,461 | 3,461 |  |  | 3,318 | 3,906 | 3,318 | 3,318 | 3,906 | 3,461
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 231,350 | 203,976
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 231,350 | 203,976
Commercial | Lease financing |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 0 |  |  |  | 0 | 0 | 0 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Recoveries |  |  |  |  |  |  |  |  | 12 | 15 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | 12 | 15 |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | (12) | (15) |  |  |
Balance at end of year | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Total ending allowance balance | 0 |  |  | 0 | 0 |  |  | 0 | 0 | 0 | 0 | 0 | 0
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Consumer | Single Family Residential Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 13,128 |  |  |  | 10,996 | 13,128 | 10,996 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (2,369) | (558) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 150 | 436 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | (2,219) | (122) |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | (423) | 2,254 |  |  |
Balance at end of year | 10,486 |  |  |  | 13,128 |  |  |  | 10,486 | 13,128 | 10,996 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 574 | 161
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 9,912 | 12,967
Total ending allowance balance | 10,486 |  |  | 13,128 | 13,128 |  |  | 10,996 | 13,128 | 13,128 | 10,996 | 10,486 | 13,128
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 23,657 | 18,193
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 1,567,117 | 2,287,297
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | 1,590,774 | 2,305,490
Consumer | Other Consumer |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 941 |  |  |  | 802 | 941 | 802 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (112) | (14,073) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 319 | 23 |  |  |
Net charge-offs |  |  |  |  |  |  |  |  | 207 | (14,050) |  |  |
Transfer of loans to held-for-sale |  |  |  |  |  |  |  |  | 0 |  |  |  |
Provision for loan losses |  |  |  |  |  |  |  |  | (710) | 14,189 |  |  |
Balance at end of year | 438 |  |  |  | 941 |  |  |  | 438 | 941 | 802 |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 4 | 106
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 434 | 835
Total ending allowance balance | $ 438 |  |  | $ 941 | $ 941 |  |  | $ 802 | $ 941 | $ 941 | $ 802 | 438 | 941
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 679 | 921
Collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  | 53,486 | 69,344
Total ending loan balances |  |  |  |  |  |  |  |  |  |  |  | $ 54,165 | $ 70,265

X
- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of other addition (reduction) in allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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