6. Debt

On January 30, 2015, we amended our senior revolving credit facility (“Credit Facility”) to, among other things, increase the maximum availability under the Credit Facility from $1.10 billion to $1.26 billion and added a new $100.0 million term loan facility to our existing senior term loans (“Term Loans”), for a total amount outstanding of $341.3 million. Under the Credit Facility, we have the right to request increases in available borrowings up to an additional $150.0 million, subject to the satisfaction of certain conditions. Additionally, the Credit Facility has a sublimit of $400.0 million for the issuance of letters of credit and bankers’ acceptances and matures in October 2018. We had outstanding borrowings under our Credit Facility totaling $420.0 million and $200.0 million as of December 31, 2014 and 2013, respectively. Our issued letters of credit under the Credit Facility totaled $14.8 million and $7.4 million as of December 31, 2014 and 2013, respectively. We also had $241.3 million and $242.5 million in Term Loans outstanding as of December 31, 2014 and 2013, respectively. As of December 31, 2014 and 2013, the unused portion of our Credit Facility was $665.2 million and $892.6 million, respectively.

Borrowings under our Credit Facility and Term Loans related to base rate loans or Eurodollar rate loans bear floating interest rates plus applicable margins. As of December 31, 2014, the applicable margins for base rate loans and Eurodollar rate loans were 1.25% and 2.25%, respectively. Letters of credit issued under our Credit Facility are subject to letter of credit fees of 2.50% as of December 31, 2014, and the unused portion of our Credit Facility is subject to commitment fees of 0.30% as of December 31, 2014.

Our Credit Facility and our Term Loans contain certain financial and other covenants with which we are required to comply. Our failure to comply with the covenants contained in our Credit Facility and our Term Loans could result in an event of default. An event of default, if not cured or waived, would permit acceleration of any outstanding indebtedness under the Credit Facility and our Term Loans, trigger cross‑defaults under certain other agreements to which we are a party and impair our ability to obtain working capital advances and issue letters of credit, which would have a material adverse effect on our business, financial condition, results of operations and cash flows. As of December 31, 2014, we were in compliance with all financial and other covenants contained in our Credit Facility and our Term Loans.

Outside of our Credit Facility we have other uncommitted credit lines primarily for the issuance of letters of credit, bank guarantees and bankers’ acceptances. These credit lines are renewable on an annual basis and are subject to fees at market rates. As of December 31, 2014 and 2013, our outstanding letters of credit and bank guarantees under these credit lines totaled $211.4 million and $150.6 million, respectively.

Substantially all of the letters of credit and bank guarantees issued under our Credit Facility and the uncommitted credit lines were provided to suppliers in the normal course of business and generally expire within one year of issuance. Expired letters of credit and bank guarantees are renewed as needed.

Our debt consisted of the following (in thousands):


	As of December 31,
	2014		2013
Credit Facility	$	420,000	$	200,000
Term Loans		241,288		242,500
Acquisition promissory notes		12,635		13,403
Other		15,945		7,808
Total debt		689,868		463,711
Short-term debt		17,914		14,647
Long-term debt	$	671,954	$	449,064

The acquisition promissory notes are payable in varying amounts from April 2015 to July 2017 and bear interest at annual rates of approximately 1.2% as of December 31, 2014. The other debt primarily relates to capital leases and loans payable to noncontrolling shareholders of a consolidated subsidiary which are payable in varying amounts through August 2021 and bear interest at annual rates ranging from 2.2% to 6.3% as of December 31, 2014. The weighted average interest rate on our short‑term debt was 2.2% and 2.1% as of December 31, 2014 and 2013, respectively.

As of December 31, 2014, the aggregate annual maturities of debt are as follows (in thousands):


Year Ended December 31,
2015	$	17,914
2016		18,042
2017		20,833
2018		631,901
2019		770
Thereafter		408
	$	689,868

The following table provides additional information about our interest income and expense and other financing costs, net (in thousands):


	2014		2013		2012
Interest income	$	5,993	$	3,882	$	908
Interest expense and other financing costs		(31,230)		(21,169)		(20,005)
	$	(25,237)	$	(17,287)	$	(19,097)