In October 2015, we took delivery of Norwegian Escape. To finance the payment due upon delivery, we drew $577.2 million of our €590.5 million Breakaway three loan due 2027. The loan bears interest at 2.98%.

In November 2015, we issued the $600.0 million 4.625% senior unsecured notes due 2020 and redeemed our $300.0 million 5.00% senior unsecured notes due 2018.

In December 2015, we adopted ASU No. 2015-03 which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. We also adopted ASU No. 2015-15 which allows an entity to defer and present debt issuance costs related to a line of credit arrangement as an asset. These deferred costs are amortized over the life of the loan agreement. We applied this guidance on a retrospective basis.

The following is a reconciliation of changes to our long-term debt due to the adoption of ASU No. 2015-03 (in thousands):

In December 2015, we amended and increased our €666 million Seahawk 1 term loan and our €666 million Seahawk 2 term loan to €710.8 million and €706.8 million, respectively.

Interest expense, net for the year ended December 31, 2015 was $222.1 million which included $36.6 million of amortization and a $12.7 million loss on extinguishment of debt. Interest expense, net for the year ended December 31, 2014 was $151.8 million which included $32.3 million of amortization and $15.4 million of expenses related to financing transactions in connection with the Acquisition of Prestige.  For the year ended December 31, 2013, interest expense, net was $282.6 million which included amortization of $64.9 million (including a $37.3 million write-off of deferred financing fees).

Our debt agreements contain covenants that, among other things, require us to maintain a minimum level of liquidity, as well as limit our net funded debt-to-capital ratio, maintain certain other ratios and restrict our ability to pay dividends. Our ships and substantially all other property and equipment are pledged as collateral for substantially all of our debt. We believe we were in compliance with these covenants as of December 31, 2015.

The following are scheduled principal repayments on long-term debt including capital lease obligations as of December 31, 2015 for each of the next five years (in thousands):