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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses and Recorded Investment Excluding Accrued Interest in Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | $ 56,678 | $ 42,385 | $ 49,333 | $ 40,444 |  |  |
Charge-offs | (388) | (959) | (15,977) | (4,214) |  |  |
Recoveries | 82 | 85 | 864 | 195 |  |  |
Provision | 1,410 | 3,561 | 23,562 | 8,647 |  |  |
Balance at end of period | 57,782 | 45,072 | 57,782 | 45,072 |  |  |
Individually evaluated for impairment |  |  |  |  | $ 902 |  | $ 415
Collectively evaluated for impairment |  |  |  |  | 56,880 |  | 44,657
Total ending ALLL balance | 56,678 | 42,385 | 49,333 | 40,444 | 57,782 | $ 49,333 | 45,072
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 30,551 |  | 15,915
Collectively evaluated for impairment |  |  |  |  | 7,222,742 |  | 6,210,982
Total ending loan balances |  |  |  |  | 7,253,293 | 6,659,407 | 6,226,897
Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | Commercial and industrial |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 16,864 | 10,495 | 14,280 | 7,584 |  |  |
Charge-offs | (342) | (571) | (689) | (953) |  |  |
Recoveries | 61 | 0 | 158 | 0 |  |  |
Provision | (40) | 2,576 | 2,794 | 5,869 |  |  |
Balance at end of period | 16,543 | 12,500 | 16,543 | 12,500 |  |  |
Individually evaluated for impairment |  |  |  |  | 122 |  | 195
Collectively evaluated for impairment |  |  |  |  | 16,421 |  | 12,305
Total ending ALLL balance | 16,864 | 10,495 | 14,280 | 7,584 | 16,543 | 14,280 | 12,500
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 5,614 |  | 497
Collectively evaluated for impairment |  |  |  |  | 1,667,441 |  | 1,602,308
Total ending loan balances |  |  |  |  | 1,673,055 | 1,701,951 | 1,602,805
Commercial | Commercial and industrial | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | Commercial real estate |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 5,732 | 5,126 | 4,971 | 5,467 |  |  |
Charge-offs | 0 | 0 | 0 | (113) |  |  |
Recoveries | 0 | 0 | 0 | 0 |  |  |
Provision | 280 | 202 | 1,041 | (26) |  |  |
Balance at end of period | 6,012 | 5,328 | 6,012 | 5,328 |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 6,012 |  | 5,328
Total ending ALLL balance | 5,732 | 5,126 | 4,971 | 5,467 | 6,012 | 4,971 | 5,328
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 823,193 |  | 713,120
Total ending loan balances |  |  |  |  | 823,193 | 717,415 | 713,120
Commercial | Commercial real estate | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | Multifamily |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 14,630 | 10,686 | 13,265 | 11,376 |  |  |
Charge-offs | 0 | 0 | (8) | 0 |  |  |
Recoveries | 0 | 0 | 0 | 0 |  |  |
Provision | 843 | 588 | 2,216 | (102) |  |  |
Balance at end of period | 15,473 | 11,274 | 15,473 | 11,274 |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 15,473 |  | 11,274
Total ending ALLL balance | 14,630 | 10,686 | 13,265 | 11,376 | 15,473 | 13,265 | 11,274
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 2,112,190 |  | 1,617,890
Total ending loan balances |  |  |  |  | 2,112,190 | 1,816,141 | 1,617,890
Commercial | Multifamily | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | SBA |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 1,840 | 1,084 | 1,701 | 939 |  |  |
Charge-offs | 0 | (58) | (683) | (351) |  |  |
Recoveries | 8 | 83 | 240 | 157 |  |  |
Provision | 22 | 188 | 612 | 552 |  |  |
Balance at end of period | 1,870 | 1,297 | 1,870 | 1,297 |  |  |
Individually evaluated for impairment |  |  |  |  | 133 |  | 54
Collectively evaluated for impairment |  |  |  |  | 1,737 |  | 1,243
Total ending ALLL balance | 1,840 | 1,084 | 1,701 | 939 | 1,870 | 1,701 | 1,297
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 1,834 |  | 377
Collectively evaluated for impairment |  |  |  |  | 69,660 |  | 78,227
Total ending loan balances |  |  |  |  | 71,494 | 78,699 | 78,604
Commercial | SBA | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | Construction |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 3,419 | 2,974 | 3,318 | 2,015 |  |  |
Charge-offs | 0 | 0 | 0 | (29) |  |  |
Recoveries | 0 | 0 | 0 | 0 |  |  |
Provision | (172) | 238 | (71) | 1,226 |  |  |
Balance at end of period | 3,247 | 3,212 | 3,247 | 3,212 |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 3,247 |  | 3,212
Total ending ALLL balance | 3,419 | 2,974 | 3,318 | 2,015 | 3,247 | 3,318 | 3,212
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 0
Collectively evaluated for impairment |  |  |  |  | 200,294 |  | 176,397
Total ending loan balances |  |  |  |  | 200,294 | 182,960 | 176,397
Commercial | Construction | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Commercial | Lease financing |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 0 | 3 | 0 | 6 |  |  |
Charge-offs | 0 | 0 | 0 | 0 |  |  |
Recoveries | 3 | 0 | 12 | 29 |  |  |
Provision | (3) | (1) | (12) | (33) |  |  |
Balance at end of period | 0 | 2 | 0 | 2 |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 1
Collectively evaluated for impairment |  |  |  |  | 0 |  | 1
Total ending ALLL balance | 0 | 3 | 0 | 6 | 0 | 0 | 2
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 0 |  | 41
Collectively evaluated for impairment |  |  |  |  | 0 |  | 50
Total ending loan balances |  |  |  |  | 0 | 13 | 91
Commercial | Lease financing | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Consumer | Single Family Residential Mortgage |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 13,236 | 11,009 | 10,996 | 12,075 |  |  |
Charge-offs | (45) | (78) | (524) | (2,490) |  |  |
Recoveries | 0 | 0 | 436 | 1 |  |  |
Provision | 407 | (564) | 2,690 | 781 |  |  |
Balance at end of period | 13,598 | 10,367 | 13,598 | 10,367 |  |  |
Individually evaluated for impairment |  |  |  |  | 640 |  | 165
Collectively evaluated for impairment |  |  |  |  | 12,958 |  | 10,202
Total ending ALLL balance | 13,236 | 11,009 | 10,996 | 12,075 | 13,598 | 10,996 | 10,367
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 22,364 |  | 14,636
Collectively evaluated for impairment |  |  |  |  | 2,277,705 |  | 1,905,674
Total ending loan balances |  |  |  |  | 2,300,069 |  | 1,920,310
Consumer | Single Family Residential Mortgage | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | 0 |  | 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | 0
Consumer | Other Consumer |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at beginning of period | 957 | 1,008 | 802 | 982 |  |  |
Charge-offs | (1) | (252) | (14,073) | (278) |  |  |
Recoveries | 10 | 2 | 18 | 8 |  |  |
Provision | 73 | 334 | 14,292 | 380 |  |  |
Balance at end of period | 1,039 | 1,092 | 1,039 | 1,092 |  |  |
Individually evaluated for impairment |  |  |  |  | 7 |  | 0
Collectively evaluated for impairment |  |  |  |  | 1,032 |  | 1,092
Total ending ALLL balance | $ 957 | 1,008 | $ 802 | 982 | 1,039 | $ 802 | 1,092
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 739 |  | 364
Collectively evaluated for impairment |  |  |  |  | 72,259 |  | 117,316
Total ending loan balances |  |  |  |  | $ 72,998 |  | 117,680
Consumer | Other Consumer | Purchased Credit Impaired |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |
Balance at end of period |  | 0 |  | 0 |  |  |
Total ending ALLL balance |  | $ 0 |  | $ 0 |  |  | 0
Loans: |  |  |  |  |  |  |
Total ending loan balances |  |  |  |  |  |  | $ 0

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=84173941&loc=SL6953423-111524 + 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=84173941&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 Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: 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 Reference 2: 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=84173941&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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