DEBT

Long-term debt consisted of the following at December 31:



In thousands
	2013		2012
Obligations under capital leases	$	7,343	$	5,234
$1 billion senior credit facility weighted average rate 1.60%, due in 2016	272,358		225,931
$100 million private placement notes 5.64%, due in 2015	100,000		100,000
$175 million private placement notes 3.89%, due in 2017	175,000		175,000
$125 million private placement notes 2.68%, due in 2019	125,000		125,000
$225 million private placement notes 4.47%, due in 2020	225,000		225,000
$125 million private placement notes 3.26%, due in 2022	125,000		125,000
Acquisition notes weighted average rate of 2.26% and weighted average maturity of 3.6 years	252,195		235,856
Foreign bank debt weighted average rate 8.37% and weighted average maturity of 1.6 years	149,147		139,063
Total debt	1,431,043		1,356,084
Less: current portion of total debt	150,380		87,781
Long-term portion of total debt	$	1,280,663	$	1,268,303

Payments due on long-term debt, excluding capital lease obligations, during each of the five years subsequent to December 31, 2013 are as follows:



In thousands
2014	$	146,908
2015	211,744
2016	344,556
2017	204,971
2018	20,688
Thereafter	494,833
	$	1,423,700

We paid interest of $51.0 million, $47.5 million and $43.5 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Property under capital leases included with property, plant and equipment in the accompanying consolidated balance sheets is as follows at December 31:



In thousands
	2013			2012
Land	$	198		$	190
Buildings	550			528
Machinery and equipment	2,262			2,451
Vehicles	10,530			7,377
Office equipment and furniture	—			123
Less: accumulated depreciation	(3,905		)	(4,059		)
	$	9,635		$	6,610

Amortization related to these capital leases is included with depreciation expense.

Minimum future lease payments under capital leases are as follows:



In thousands
2014	$	3,991
2015	2,448
2016	1,073
2017	374
2018	40
Thereafter	389
Total minimum lease payments	8,315
Less: amounts representing interest	(972		)
Present value of net minimum lease payments	7,343
Less: current portion included in other current liabilities	(3,472		)
Long-term obligations under capital leases	$	3,871

Our $1.0 billion senior credit facility maturing in September 2016, our $100.0 million private placement notes maturing April 2015, our $175.0 million private placement notes maturing in October 2017, our $125.0 million private placement notes maturing in December 2019, our $225.0 million private placement notes maturing in October 2020, and our $125.0 million private placement notes maturing in December 2022, all require us to comply with various financial, reporting and other covenants and restrictions, including a restriction on dividend payments. The financial debt covenants are the same for the senior credit facility and the private placement notes. At December 31, 2013, we were in compliance with all of our financial debt covenants.

As of December 31, 2013 and 2012, we had $155.0 million and $157.6 million, respectively, committed to outstanding letters of credit under our senior credit facility. The unused portion of the revolving credit facility as of December 31, 2013 and 2012 was $572.6 million and $616.5 million, respectively.

Guarantees and loans

Shiraishi-Sogyo Co. Ltd. (“Shiraishi”) is an unrelated party in Japan that is expanding its medical waste management business. We have guaranteed Shiriashi’s loan of $4.7 million borrowed from JPMorganChase Bank N.A. which is currently due on May 31, 2014. Based on information currently available, we have concluded the guarantee is not probable of being called and, therefore, we have not recorded any contingent liability relating to this guarantee. We have also extended non-interest bearing loans to Shiraishi for approximately $15.5 million due April 18, 2018, which are reflected in the Consolidated Balance Sheet as part of long term "Other assets" at December 31, 2013 and 2012. There is a collateral agreement in place on the assets of Shiraishi and related companies in support of amounts owed to the Company.