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SECURITIES - Carrying balances of securities (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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SECURITIES |  |
Securities available-for-sale, at fair value | $ 618,120 | $ 679,526
Securities held-to-maturity | 99,861 | 121,715
Equity securities: Readily determinable fair value | 3,251 | 3,081
Equity securities: No readily determinable fair value | 1,185 | 180
Total securities | $ 722,417 | $ 804,502

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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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