{"pre_text": ["liquidity and capital resources the following table summarizes liquidity data as of the dates indicated ( in thousands ) : december 31 , december 31 ."], "post_text": ["total debt ( 1 ) 3365687 1599695 current maturities ( 2 ) 68414 57494 capacity under credit facilities ( 3 ) 2550000 1947000 availability under credit facilities ( 3 ) 1019112 1337653 total liquidity ( cash and equivalents plus availability on credit facilities ) 1246512 1425050 ( 1 ) debt amounts reflect the gross values to be repaid ( excluding debt issuance costs of $ 23.9 million and $ 15.0 million as of december 31 , 2016 and 2015 , respectively ) .", "( 2 ) debt amounts reflect the gross values to be repaid ( excluding debt issuance costs of $ 2.3 million and $ 1.5 million as of december 31 , 2016 and 2015 , respectively ) .", "( 3 ) includes our revolving credit facilities , our receivables securitization facility , and letters of credit .", "we assess our liquidity in terms of our ability to fund our operations and provide for expansion through both internal development and acquisitions .", "our primary sources of liquidity are cash flows from operations and our credit facilities .", "we utilize our cash flows from operations to fund working capital and capital expenditures , with the excess amounts going towards funding acquisitions or paying down outstanding debt .", "as we have pursued acquisitions as part of our growth strategy , our cash flows from operations have not always been sufficient to cover our investing activities .", "to fund our acquisitions , we have accessed various forms of debt financing , including revolving credit facilities , senior notes , and a receivables securitization facility .", "as of december 31 , 2016 , we had debt outstanding and additional available sources of financing , as follows : 2022 senior secured credit facilities maturing in january 2021 , composed of term loans totaling $ 750 million ( $ 732.7 million outstanding at december 31 , 2016 ) and $ 2.45 billion in revolving credit ( $ 1.36 billion outstanding at december 31 , 2016 ) , bearing interest at variable rates ( although a portion of this debt is hedged through interest rate swap contracts ) reduced by $ 72.7 million of amounts outstanding under letters of credit 2022 senior notes totaling $ 600 million , maturing in may 2023 and bearing interest at a 4.75% ( 4.75 % ) fixed rate 2022 euro notes totaling $ 526 million ( 20ac500 million ) , maturing in april 2024 and bearing interest at a 3.875% ( 3.875 % ) fixed rate 2022 receivables securitization facility with availability up to $ 100 million ( $ 100 million outstanding as of december 31 , 2016 ) , maturing in november 2019 and bearing interest at variable commercial paper from time to time , we may undertake financing transactions to increase our available liquidity , such as our january 2016 amendment to our senior secured credit facilities , the issuance of 20ac500 million of euro notes in april 2016 , and the november 2016 amendment to our receivables securitization facility .", "the rhiag acquisition was the catalyst for the april issuance of 20ac500 million of euro notes .", "given that rhiag is a long term asset , we considered alternative financing options and decided to fund a portion of this acquisition through the issuance of long term notes .", "additionally , the interest rates on rhiag's acquired debt ranged between 6.45% ( 6.45 % ) and 7.25% ( 7.25 % ) .", "with the issuance of the 20ac500 million of senior notes at a rate of 3.875% ( 3.875 % ) , we were able to replace rhiag's borrowings with long term financing at favorable rates .", "this refinancing also provides financial flexibility to execute our long-term growth strategy by freeing up availability under our revolver .", "if we see an attractive acquisition opportunity , we have the ability to use our revolver to move quickly and have certainty of funding .", "as of december 31 , 2016 , we had approximately $ 1.02 billion available under our credit facilities .", "combined with approximately $ 227.4 million of cash and equivalents at december 31 , 2016 , we had approximately $ 1.25 billion in available liquidity , a decrease of $ 178.5 million from our available liquidity as of december 31 , 2015 .", "we expect to use the proceeds from the sale of pgw's glass manufacturing business to pay down borrowings under our revolving credit facilities , which would increase our available liquidity by approximately $ 310 million when the transaction closes. ."], "table": [["", "december 31 2016", "december 31 2015"], ["cash and equivalents", "$ 227400", "$ 87397"], ["total debt ( 1 )", "3365687", "1599695"], ["current maturities ( 2 )", "68414", "57494"], ["capacity under credit facilities ( 3 )", "2550000", "1947000"], ["availability under credit facilities ( 3 )", "1019112", "1337653"], ["total liquidity ( cash and equivalents plus availability on credit facilities )", "1246512", "1425050"]], "table_ori": [["", "December 31, 2016", "December 31, 2015"], ["Cash and equivalents", "$227,400", "$87,397"], ["Total debt<sup>(1)</sup>", "3,365,687", "1,599,695"], ["Current maturities<sup>(2)</sup>", "68,414", "57,494"], ["Capacity under credit facilities<sup>(3)</sup>", "2,550,000", "1,947,000"], ["Availability under credit facilities<sup>(3)</sup>", "1,019,112", "1,337,653"], ["Total liquidity (cash and equivalents plus availability on credit facilities)", "1,246,512", "1,425,050"]]}

Question: what was the change in total debt from 2015 to 2016?
Evidence:
table_2: the total debt ( 1 ) of december 31 2016 is 3365687 ; the total debt ( 1 ) of december 31 2015 is 1599695 ;
Program: subtract(3365687, 1599695)
Answer:
str_answer: 1765992
exe_answer: 1765992