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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Fixed income | $ 102,000 | $ 112,000 | $ 228,000 | $ 208,000
Mortgage banking and title income | 38,000 | 4,000 | 91,000 | 7,000
Deposit transactions and cash management | 44,000 | 31,000 | 86,000 | 61,000
Brokerage, management fees and commissions | 21,000 | 14,000 | 41,000 | 29,000
Trust services and investment management | 14,000 | 8,000 | 26,000 | 15,000
Bankcard income | 15,000 | 7,000 | 25,000 | 14,000
Securities gains (losses), net | 11,000 | (1,000) | 11,000 | (1,000)
Other income | 40,000 | 31,000 | 75,000 | 48,000
Total noninterest income | 285,000 | 206,000 | 583,000 | 381,000
Regional Banking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Fixed income | 0 | 0 | 1,000 | 0
Mortgage banking and title income | 0 | 0 | 0 | 0
Deposit transactions and cash management | 39,000 | 27,000 | 77,000 | 52,000
Brokerage, management fees and commissions | 21,000 | 14,000 | 41,000 | 29,000
Trust services and investment management | 14,000 | 8,000 | 26,000 | 15,000
Bankcard income | 14,000 | 7,000 | 24,000 | 13,000
Securities gains (losses), net | 0 | 0 | 0 | 0
Other income | 20,000 | 13,000 | 39,000 | 33,000
Total noninterest income | 108,000 | 69,000 | 208,000 | 142,000
Specialty Banking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Fixed income | 102,000 | 112,000 | 227,000 | 208,000
Mortgage banking and title income | 38,000 | 4,000 | 90,000 | 6,000
Deposit transactions and cash management | 3,000 | 3,000 | 6,000 | 6,000
Brokerage, management fees and commissions | 0 | 0 | 0 | 0
Trust services and investment management | 0 | 0 | 0 | 0
Bankcard income | 1,000 | 0 | 1,000 | 1,000
Securities gains (losses), net | 0 | 0 | 0 | 0
Other income | 6,000 | 5,000 | 11,000 | 7,000
Total noninterest income | 150,000 | 124,000 | 335,000 | 228,000
Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Fixed income | 0 | 0 | 0 | 0
Mortgage banking and title income | 0 | 0 | 1,000 | 1,000
Deposit transactions and cash management | 2,000 | 1,000 | 3,000 | 3,000
Brokerage, management fees and commissions | 0 | 0 | 0 | 0
Trust services and investment management | 0 | 0 | 0 | 0
Bankcard income | 0 | 0 | 0 | 0
Securities gains (losses), net | 11,000 | (1,000) | 11,000 | (1,000)
Other income | 14,000 | 13,000 | 25,000 | 8,000
Total noninterest income | 27,000 | 13,000 | 40,000 | 11,000
Underwriting, portfolio advisory, and other noninterest income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer | $ 14,000 | $ 9,000 | $ 24,000 | $ 18,000

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- Definition Acting as an agent, a broker-dealer may buy and sell securities on behalf of its customers. In return for such services, the broker-dealer charges a commission. Each time a customer enters into a buy or sell transaction, a commission is earned by the broker-dealer for its selling and administrative efforts. For securities purchased, the commission is recorded as a receivable from customers; for securities sold, it is recorded as reductions in the payable to customers. Commissions earned are usually related to the broker-dealer's customers' trading volume and the dollar amounts of the trades. In general, commissions are for smaller trades of exchange-listed stocks and bonds made by retail customers. Revenue recognized in the period for (1) performance (incentive) fees based on the investment results achieved for management of certain institutional accounts and hedge funds, (2) schedule-based fees earned for management of mutual funds and closed-end funds, based either on average daily net assets or on a combination of the average daily net assets and gross income, and (3) other investment management and advisory fees. + References No definition available. + Details
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- Definition Income from mortgage banking activities (fees and commissions) and servicing real estate mortgages, credit cards, and other financial assets held by others net of any related impairment of capitalized service costs. Also includes any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1402 -Subsection Instruction 3 + Details
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- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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