7. BORROWINGS

Short-term Borrowings

The Company classifies all borrowings that will mature within a year from the date on which the Company enters into them as short-term borrowings. Total short-term borrowings consist primarily of advances from the FHLB, federal funds purchased (which are secured overnight borrowings from other financial institutions), and other lines of credit. Also included in total short-term borrowings are securities sold under agreements to repurchase, which are secured transactions with customers and generally mature the day following the date sold.

Total short-term borrowings consist of the following as of September 30, 2019 and December 31, 2018 (dollars in thousands):

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The Bank maintains federal funds lines with several correspondent banks, the remaining available balance of which was $647.0 million and $382.0 million at September 30, 2019 and December 31, 2018, respectively. The Company maintains an alternate line of credit at a correspondent bank, the available balance of which was $25.0 million at both September 30, 2019 and December 31, 2018. The Company has certain restrictive covenants related to certain asset quality, capital, and profitability metrics associated with these lines and is considered to be in compliance with such covenants as of September 30, 2019. Additionally, the Company had a collateral dependent line of credit with the FHLB of up to $5.1 billion and $4.0 billion at September 30, 2019 and December 31, 2018, respectively.

Long-term Borrowings

In connection with several previous bank acquisitions, the Company issued and acquired trust preferred capital notes of $58.5 million and $87.0 million, respectively. Most recently, in connection with the acquisition of Access on February 1, 2019, the Company acquired additional trust preferred capital notes totaling $5.0 million. The remaining fair value discount on all acquired trust preferred capital notes was $15.1 million at September 30, 2019.

The trust preferred capital notes currently qualify for Tier 2 capital of the Company for regulatory purposes. Trust preferred capital notes consist of the following as of September 30, 2019:

During the fourth quarter of 2016, the Company issued $150.0 million of fixed-to-floating rate subordinated notes with an initial fixed interest rate of 5.00% through December 15, 2021. The interest rate then changes to a floating rate of LIBOR plus 3.175% through its maturity date on December 15, 2026. In connection with the acquisition of Xenith on January 1, 2018, the Company acquired $8.5 million of subordinated notes with a fair value premium of $259,000, which was $77,000 at September 30, 2019. The acquired subordinated notes have a fixed interest rate of 6.75% and a maturity date of June 30, 2025. At September 30, 2019 and December 31, 2018, the contractual principal reported for subordinated notes was $158.5 million; remaining issuance discount as of September 30, 2019 and December 31, 2018 is $1.4 million and $1.6 million, respectively. The subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. The Company has certain restrictive covenants related to certain asset quality, capital, and profitability metrics associated with the acquired subordinated notes and is considered to be in compliance with these covenants as of September 30, 2019.

On August 23, 2012, the Company modified its fixed rate FHLB advances to floating rate advances, which resulted in reducing the Company’s FHLB borrowing costs. In connection with this modification, the Company incurred a prepayment penalty of $19.6 million on the original advances. On August 29, 2019, the Company repaid the floating rate FHLB advances. In connection with this repayment, the remaining unamortized prepayment penalty of $7.4 million was immediately recognized as a component of noninterest expense.

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As of September 30, 2019, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands):

As of December 31, 2018, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands):

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For information on the carrying value of loans and securities pledged as collateral on FHLB advances as of September 30, 2019 and December 31, 2018, refer to Note 8 "Commitments and Contingencies."

As of September 30, 2019, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands):

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