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Non-interest Income and Expense - Components of Non-Interest Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | $ 10,469 | $ 10,590 | $ 27,763 | $ 29,788
Increase in cash value of life insurance | 773 | 773 | 2,203 | 2,294
Asset management and commission income | 667 | 721 | 2,244 | 2,102
Gain on sale of loans | 3,035 | 1,236 | 5,662 | 2,223
Lease brokerage income | 175 | 172 | 495 | 631
Sale of customer checks | 91 | 126 | 303 | 401
Gain on sale of investment securities | 7 | 107 | 7 | 107
Gain on marketable equity securities | 0 | 22 | 72 | 100
Other | (80) | 361 | (135) | 1,688
Total other non-interest income | 4,668 | 3,518 | 10,851 | 9,546
Total non-interest income | 15,137 | 14,108 | 38,614 | 39,334
ATM and interchange fees |  |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | 5,637 | 5,427 | 15,913 | 15,412
Service charges on deposit accounts |  |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | 3,334 | 4,327 | 10,426 | 12,389
Other service fees |  |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | 805 | 808 | 2,296 | 2,198
Mortgage banking service fees |  |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | 457 | 483 | 1,386 | 1,441
Change in value of mortgage servicing rights |  |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |  |
Total service charges and fees | $ 236 | $ (455) | $ (2,258) | $ (1,652)

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- Definition Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies. + 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=116637391&loc=SL114874048-224260 + Details
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