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Borrowed Funds | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Borrowed Funds | Borrowed Funds Borrowed funds consist of the following obligations as of:
| June 30, 2018 |  | December 31, 2017
| Amount |  | Rate |  | Amount |  | Rate
FHLB advances | $ | 315,000 |  |  | 2.09 | % |  | $ | 290,000 |  |  | 1.94 | %
Securities sold under agreements to repurchase without stated maturity dates | 31,296 |  |  | 0.10 | % |  | 54,878 |  |  | 0.12 | %
Federal funds purchased | 16,200 |  |  | 2.14 | % |  | — |  |  | — | %
Total | $ | 362,496 |  |  | 1.92 | % |  | $ | 344,878 |  |  | 1.65 | %
FHLB advances are collateralized by a blanket lien on all qualified 1-4 family residential real estate loans, specific AFS securities, and FHLB stock. The following table lists the maturities and weighted average interest rates of FHLB advances as of:
| June 30, 2018 |  | December 31, 2017
| Amount |  | Rate |  | Amount |  | Rate
Fixed rate due 2018 | $ | 40,000 |  |  | 1.90 | % |  | $ | 70,000 |  |  | 1.96 | %
Fixed rate due 2019 | 100,000 |  |  | 1.94 | % |  | 85,000 |  |  | 1.87 | %
Fixed rate due 2020 | 55,000 |  |  | 2.18 | % |  | 35,000 |  |  | 1.80 | %
Fixed rate due 2021 | 50,000 |  |  | 1.91 | % |  | 50,000 |  |  | 1.91 | %
Variable rate due 2021 1 | 10,000 |  |  | 2.63 | % |  | 10,000 |  |  | 1.72 | %
Fixed rate due 2022 | 20,000 |  |  | 1.97 | % |  | 20,000 |  |  | 1.97 | %
Fixed rate due 2023 | 20,000 |  |  | 3.36 | % |  | 10,000 |  |  | 3.90 | %
Fixed rate due 2024 | 10,000 |  |  | 2.97 | % |  | — |  |  | — | %
Fixed rate due 2026 | 10,000 |  |  | 1.17 | % |  | 10,000 |  |  | 1.17 | %
Total | $ | 315,000 |  |  | 2.09 | % |  | $ | 290,000 |  |  | 1.94 | %
(1) | Hedged advance (see "Derivative Instruments" section below)
Securities sold under agreements to repurchase are classified as secured borrowings and are reflected at the amount of cash received in connection with the transaction. The securities underlying the agreements have a carrying value and a fair value of $31,315 and $54,898 at June 30, 2018 and December 31, 2017, respectively. Such securities remain under our control. We may be required to provide additional collateral based on the fair value of underlying securities. Securities sold under repurchase agreements without stated maturity dates, federal funds purchased, and FRB Discount Window advances generally mature within one to four days from the transaction date. The following table provides a summary of securities sold under repurchase agreements without stated maturity dates and federal funds purchased. We had no FRB Discount Window advances during the three and six month periods ended June 30, 2018.
| Three Months Ended June 30
| 2018 |  | 2017
| Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period |  | Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period
Securities sold under agreements to repurchase without stated maturity dates | $ | 34,242 |  |  | $ | 32,957 |  |  | 0.09 | % |  | $ | 55,731 |  |  | $ | 53,841 |  |  | 0.13 | %
Federal funds purchased | 16,200 |  |  | 9,199 |  |  | 1.82 | % |  | 5,965 |  |  | 7,496 |  |  | 1.13 | %
FRB Discount Window | — |  |  | — |  |  | — | % |  | — |  |  | 88 |  |  | 1.48 | %
| Six Months Ended June 30
| 2018 |  | 2017
| Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period |  | Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period
Securities sold under agreements to repurchase without stated maturity dates | $ | 38,967 |  |  | $ | 34,467 |  |  | 0.09 | % |  | $ | 61,131 |  |  | $ | 55,663 |  |  | 0.13 | %
Federal funds purchased | 16,200 |  |  | 6,843 |  |  | 1.77 | % |  | 27,300 |  |  | 4,197 |  |  | 1.11 | %
FRB Discount Window | — |  |  | — |  |  | — | % |  | — |  |  | 44 |  |  | 1.48 | %
We had pledged AFS securities and 1-4 family residential real estate loans in the following amounts at:
| June 30 2018 |  | December 31 2017
Pledged to secure borrowed funds | $ | 423,968 |  |  | $ | 410,988 |
Pledged to secure repurchase agreements | 31,315 |  |  | 54,898 |
Pledged for public deposits and for other purposes necessary or required by law | 34,386 |  |  | 27,976 |
Total | $ | 489,669 |  |  | $ | 493,862 |
AFS securities pledged to repurchase agreements without stated maturity dates consisted of the following at:
| June 30 2018 |  | December 31 2017
States and political subdivisions | $ | 3,346 |  |  | $ | 7,332 |
Mortgage-backed securities | 6,537 |  |  | 13,199 |
Collateralized mortgage obligations | 21,432 |  |  | 34,367 |
Total | $ | 31,315 |  |  | $ | 54,898 |
AFS securities pledged to repurchase agreements are monitored to ensure the appropriate level is collateralized. In the event of maturities, calls, significant principal repayments, or significant decline in market values, we have adequate levels of AFS securities to pledge to satisfy required collateral. As of June 30, 2018, we had the ability to borrow up to an additional $112,113, based on assets pledged as collateral. We had no investment securities that were restricted to be pledged for specific purposes. Derivative Instruments We enter into interest rate swaps to manage exposure to interest rate risk and variability in cash flows. The interest rate swaps, associated with our variable rate borrowings, are designated upon inception as cash flow hedges of forecasted interest payments. We enter into LIBOR-based interest rate swaps that involve the receipt of variable amounts in exchange for fixed rate payments, in effect converting variable rate debt to fixed rate debt. Cash flow hedges are assessed for effectiveness using regression analysis. The effective portion of changes in fair value are recorded in OCI and subsequently reclassified into interest expense in the same period in which the related interest on the variable rate borrowings affects earnings. In the event that a portion of the changes in fair value were determined to be ineffective, the ineffective amount would be recorded in earnings. The following tables provide information on derivatives related to variable rate borrowings as of:
| June 30, 2018
| Pay Rate |  | Receive Rate |  | Remaining Life (Years) |  | Notional Amount |  | Balance Sheet Location |  | Fair Value
Derivatives designated as hedging instruments |  |  |  |  |  |  |  |  |  |  |
Cash Flow Hedges: |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps | 1.56 | % |  | 3-Month LIBOR |  | 2.7 |  | $ | 10,000 |  |  | Other Assets |  | $ | 444 |
| December 31, 2017
| Pay Rate |  | Receive Rate |  | Remaining Life (Years) |  | Notional Amount |  | Balance Sheet Location |  | Fair Value
Derivatives designated as hedging instruments |  |  |  |  |  |  |  |  |  |  |
Cash Flow Hedges: |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps | 1.56 | % |  | 3-Month LIBOR |  | 3.3 |  | $ | 10,000 |  |  | Other Assets |  | $ | 291 |
Derivatives contain an element of credit risk which arises from the possibility that we will incur a loss as a result of a counterparty failing to meet its contractual obligations. Credit risk is minimized through counterparty collateral, transaction limits and monitoring procedures. We also manage dealer credit risk by entering into interest rate derivatives only with primary and highly rated counterparties, the use of ISDA master agreements and counterparty limits. We do not anticipate any losses from failure of interest rate derivative counterparties to honor their obligations.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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