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Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | $ 1,332,753 |  | $ 1,000,000
Securities held-to-maturity |  | 2,432,654 |  | 1,188,049
Quoted market prices in an active market (Level 1) |  |  |  |
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | 0 |  | 0
Securities held-to-maturity |  | 0 |  | 0
Loans, net |  | 0 |  | 0
Consumer loans held-for-sale |  | 0 |  | 0
Commercial loans held-for-sale |  | 0 |  | 0
Financial liabilities: |  |  |  |
Deposits and securities sold under agreements to repurchase |  | 0 |  | 0
Federal Home Loan Bank advances |  | 0 |  | 0
Subordinated debt and other borrowings |  | 0 |  | 0
Off-balance sheet instruments: |  |  |  |
Commitments to extend credit | [1] | 0 |  | 0
Models with significant observable market parameters (Level 2) |  |  |  |
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | 0 |  | 0
Securities held-to-maturity |  | 2,432,654 |  | 1,188,049
Loans, net |  | 0 |  | 0
Consumer loans held-for-sale |  | 66,811 |  | 46,288
Commercial loans held-for-sale |  | 35,166 |  | 17,871
Financial liabilities: |  |  |  |
Deposits and securities sold under agreements to repurchase |  | 0 |  | 0
Federal Home Loan Bank advances |  | 0 |  | 0
Subordinated debt and other borrowings |  | 0 |  | 0
Off-balance sheet instruments: |  |  |  |
Commitments to extend credit | [1] | 0 |  | 0
Models with significant unobservable market parameters (Level 3) |  |  |  |
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | 1,256,507 |  | 980,543
Securities held-to-maturity |  | 0 |  | 0
Loans, net |  | 23,927,906 |  | 23,223,299
Consumer loans held-for-sale |  | 0 |  | 0
Commercial loans held-for-sale |  | 0 |  | 0
Financial liabilities: |  |  |  |
Deposits and securities sold under agreements to repurchase |  | 31,458,595 |  | 30,812,222
Federal Home Loan Bank advances |  | 893,481 |  | 1,006,866
Subordinated debt and other borrowings |  | 458,378 |  | 479,879
Off-balance sheet instruments: |  |  |  |
Commitments to extend credit | [1] | 25,100 |  | 24,351
Carrying/ Notional Amount |  |  |  |
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | 1,332,753 |  | 1,000,000
Securities held-to-maturity |  | 2,566,386 |  | 1,155,958
Loans, net |  | 24,237,404 |  | 23,151,029
Consumer loans held-for-sale |  | 67,224 |  | 45,806
Commercial loans held-for-sale |  | 35,383 |  | 17,685
Financial liabilities: |  |  |  |
Deposits and securities sold under agreements to repurchase |  | 32,515,344 |  | 31,457,092
Federal Home Loan Bank advances |  | 888,870 |  | 888,681
Subordinated debt and other borrowings |  | 423,319 |  | 423,172
Off-balance sheet instruments: |  |  |  |
Commitments to extend credit | [1] | 13,883,896 |  | 13,063,942
Estimated Fair Value |  |  |  |
Financial assets: |  |  |  |
Securities purchased with agreement to resell |  | 1,256,507 | [2] | 980,543
Securities held-to-maturity | [2] | 2,432,654 |  | 1,188,049
Loans, net | [2] | 23,927,906 |  | 23,223,299
Consumer loans held-for-sale | [2] | 66,811 |  | 46,288
Commercial loans held-for-sale | [2] | 35,166 |  | 17,871
Financial liabilities: |  |  |  |
Deposits and securities sold under agreements to repurchase | [2] | 31,458,595 |  | 30,812,222
Federal Home Loan Bank advances | [2] | 893,481 |  | 1,006,866
Subordinated debt and other borrowings | [2] | 458,378 |  | 479,879
Off-balance sheet instruments: |  |  |  |
Commitments to extend credit | [1],[2] | $ 25,100 |  | $ 24,351
[1] | At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments, including both commitments for unfunded loans and standby letters of credit. In making this evaluation, Pinnacle Financial utilizes credit loss expectations on funded loans from our allowance for credit losses methodology and evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at March 31, 2022 and December 31, 2021, Pinnacle Financial included in other liabilities $23.0 million and $22.5 million, respectively, representing expected credit losses on off-balance sheet commitments, which are reflected in the estimated fair values of the related commitments. Also included in the fair values at March 31, 2022 and December 31, 2021 are unamortized fees related to these commitments of $2.1 million and $1.9 million, respectively.
[2] | Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction.

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