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LOAN SERVICING - Activity in SBA-Guaranteed Loan Servicing Asset (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
Service charges | $ 32.0 | $ 31.0 | $ 62.0 | $ 61.0 |
SBA-Guaranteed Loan Servicing [Member] |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
SBA loans sold to investors with servicing retained | 258.0 |  | 258.0 |  | $ 283.0
SBA loans sold with servicing retained | 7.0 | 11.0 | 13.0 | 24.0 |
Gain from sale of SBA loan, pretax | 1.0 | 1.0 | 1.0 | 2.0 |
Service charges | 0.0 | 0.0 | 1.0 | 1.0 |
Valuation allowance for servicing rights | 0.7 |  | 0.7 |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |  |  |
Balance at beginning of period | 4.0 | 5.0 | 4.0 | 5.0 |
Additions | 0.0 | 1.0 | 0.0 | 1.0 |
Amortization | 0.0 | 1.0 | 0.0 | 1.0 |
Balance at end of period | 4.0 | 5.0 | 4.0 | 5.0 |
Loan servicing rights, fair value, start | 4.0 | 5.0 | 4.0 | 5.0 |
Loan servicing rights, fair value, end | $ 4.0 | $ 5.0 | $ 4.0 | $ 5.0 |

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- Definition Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7524895&loc=d3e120260-111741 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 + Details
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- Definition Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 + Details
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