Debt	12 Months Ended
Dec. 31, 2019
Debt
Debt	14. Debt In November 2013, the Company issued $140.0 million of 7.5% Senior Unsecured Notes due November 2020. The notes provide for semi-annual interest payments and are to be repaid in full in November 2020. The indenture contains certain covenants that restrict the Company’s ability to, among other items, incur indebtedness, make restricted payments, incur liens and require the Company to maintain specified liquidity levels. The Company remains in compliance with the covenants. Debt issuance costs of $2.1 million were incurred and are being amortized over the life of the loan. In January 2015, the Company issued an additional $25.0 million 6.5% senior notes due November 2020. The notes provide for semi-annual interest payments and are to be repaid in full in November 2020. The indenture contains certain covenants that restrict the Company’s ability to, among other items, incur indebtedness, make restricted payments, incur liens and require the Company to maintain specified liquidity levels. The Company remains in compliance with the covenants. Debt issuance costs of $0.2 million were incurred and are being amortized over the life of the loan. In January 2018, the Company entered into a $25.0 million 4.2% revolving loan agreement. On March 15, 2019, the Company entered into an amended and restated revolving loan agreement (as amended, the “revolving facility”), among other things, (a) extended the maturity date to the earlier of (i) March 15, 2022, or (ii) 91 days before the maturity of the senior notes due November 2020 or, if such senior notes are amended or replaced, 91 days before the maturity of such amendment or replacement and (b) increased the aggregate principal amount of borrowing capacity from $25.0 million to $50.0 million. On August 8, 2019, the Company used a portion of the proceeds from the IPO to repay $18.0 million in complete satisfaction of the outstanding debt under the revolving facility. As of December 31, 2019, the revolving facility had a borrowing capacity of $50.0 million. Interest expense was $12.8 million, $12.3 million and $12.1 million for the years ended December 31, 2019, 2018 and 2017, respectively. Amortization expense related to debt issuance cost was $0.3 million for the years ended December 31, 2019, 2018 and 2017.

14. Debt

In November 2013, the Company issued $140.0 million of 7.5% Senior Unsecured Notes due November 2020. The notes provide for semi-annual interest payments and are to be repaid in full in November 2020. The indenture contains certain covenants that restrict the Company’s ability to, among other items, incur indebtedness, make restricted payments, incur liens and require the Company to maintain specified liquidity levels. The Company remains in compliance with the covenants. Debt issuance costs of $2.1 million were incurred and are being amortized over the life of the loan.

In January 2015, the Company issued an additional $25.0 million 6.5% senior notes due November 2020. The notes provide for semi-annual interest payments and are to be repaid in full in November 2020. The indenture contains certain covenants that restrict the Company’s ability to, among other items, incur indebtedness, make restricted payments, incur liens and require the Company to maintain specified liquidity levels. The Company remains in compliance with the covenants. Debt issuance costs of $0.2 million were incurred and are being amortized over the life of the loan.

In January 2018, the Company entered into a $25.0 million 4.2% revolving loan agreement. On March 15, 2019, the Company entered into an amended and restated revolving loan agreement (as amended, the “revolving facility”), among other things, (a) extended the maturity date to the earlier of (i) March 15, 2022, or (ii) 91 days before the maturity of the senior notes due November 2020 or, if such senior notes are amended or replaced, 91 days before the maturity of such amendment or replacement and (b) increased the aggregate principal amount of borrowing capacity from $25.0 million to $50.0 million.

On August 8, 2019, the Company used a portion of the proceeds from the IPO to repay $18.0 million in complete satisfaction of the outstanding debt under the revolving facility. As of December 31, 2019, the revolving facility had a borrowing capacity of $50.0 million.

Interest expense was $12.8 million, $12.3 million and $12.1 million for the years ended December 31, 2019, 2018 and 2017, respectively. Amortization expense related to debt issuance cost was $0.3 million for the years ended December 31, 2019, 2018 and 2017.