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FAIR VALUE MEASUREMENTS - Fair Values and Carrying Amounts (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financial Assets |  |
Securities available for sale | $ 545,327 | $ 585,046
Level 1 |  |
Financial Assets |  |
Cash and cash equivalents | 341,199 | 226,007
Securities available for sale | 0 |
FHLB stock | 0 |
Loans held for sale | 0 |
Net loans | 0 |
Accrued interest receivable | 0 |
Cash surrender value of bank-owned life insurance policies | 0 |
Derivative assets | 0 |
Financial Liabilities |  |
Securities sold under agreements to repurchase | 0 |
FHLB advances | 0 |
Derivative liabilities | 0 |
Level 1 | Bank Non-maturity Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 0 |
Level 1 | Bank Time Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 0 |
Level 1 | Subordinated borrowings |  |
Financial Liabilities |  |
Subordinated borrowings | 0 |
Level 2 |  |
Financial Assets |  |
Cash and cash equivalents | 0 |
Securities available for sale | 545,327 | 585,046
FHLB stock | 10,192 | 14,036
Loans held for sale | 0 |
Net loans | 0 |
Accrued interest receivable | 3,272 | 2,964
Cash surrender value of bank-owned life insurance policies | 79,380 | 77,870
Derivative assets | 16,972 | 25,917
Financial Liabilities |  |
Short-term other borrowings |  | 27,779
Securities sold under agreements to repurchase | 21,667 |
FHLB advances | 169,815 | 252,698
Derivative liabilities | 18,159 | 31,443
Level 2 | Bank Non-maturity Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 2,452,990 | 2,122,222
Level 2 | Bank Time Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 470,000 | 694,700
Level 2 | Subordinated borrowings |  |
Financial Liabilities |  |
Subordinated borrowings | 63,660 | 57,091
Level 3 |  |
Financial Assets |  |
Cash and cash equivalents | 0 |
Securities available for sale | 0 |
FHLB stock | 0 |
Loans held for sale | 7,505 | 24,163
Net loans | 2,472,108 | 2,547,970
Accrued interest receivable | 0 |
Cash surrender value of bank-owned life insurance policies | 0 |
Derivative assets | 47 | 22
Financial Liabilities |  |
Securities sold under agreements to repurchase | 0 |
FHLB advances | 0 |
Derivative liabilities | 140 | 95
Level 3 | Bank Non-maturity Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 0 |
Level 3 | Bank Time Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 0 |
Level 3 | Subordinated borrowings |  |
Financial Liabilities |  |
Subordinated borrowings | 0 |
Carrying Amount |  |
Financial Assets |  |
Cash and cash equivalents | 341,199 | 226,007
Securities available for sale | 545,327 | 585,046
FHLB stock | 10,192 | 14,036
Loans held for sale | 7,505 | 23,988
Net loans | 2,511,706 | 2,543,803
Accrued interest receivable | 3,272 | 2,964
Cash surrender value of bank-owned life insurance policies | 79,380 | 77,870
Derivative assets | 17,019 | 28,895
Financial Liabilities |  |
Short-term other borrowings |  | 27,779
Securities sold under agreements to repurchase | 21,667 |
FHLB advances | 168,600 | 248,283
Derivative liabilities | 18,299 | 31,348
Carrying Amount | Bank Non-maturity Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 2,538,044 | 2,207,854
Carrying Amount | Bank Time Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 469,221 | 698,361
Carrying Amount | Subordinated borrowings |  |
Financial Liabilities |  |
Subordinated borrowings | 60,083 | 59,961
Total Fair Value |  |
Financial Assets |  |
Cash and cash equivalents | 341,199 | 226,007
Securities available for sale | 545,327 | 585,046
FHLB stock | 10,192 | 14,036
Loans held for sale | 7,505 | 24,163
Net loans | 2,472,108 | 2,547,970
Accrued interest receivable | 3,272 | 2,964
Cash surrender value of bank-owned life insurance policies | 79,380 | 77,870
Derivative assets | 17,019 | 25,895
Financial Liabilities |  |
Short-term other borrowings |  | 27,779
Securities sold under agreements to repurchase | 21,667 |
FHLB advances | 169,815 | 252,698
Derivative liabilities | 18,299 | 31,348
Total Fair Value | Bank Non-maturity Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 2,452,990 | 2,122,222
Total Fair Value | Bank Time Deposits [Member] |  |
Financial Liabilities |  |
Non-maturity deposits | 470,000 | 694,700
Total Fair Value | Subordinated borrowings |  |
Financial Liabilities |  |
Subordinated borrowings | $ 63,660 | $ 57,091

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