Note 6.

Debt

Our debt consists of the following (in thousands):


	March 31,		December 31,
	2012		2011
Debt payable to 2038 at 1.5% to 8.8%	$	2,230,979	$	2,268,668
Debt service guaranty liability		74,075		74,075
Unsecured notes payable under revolving credit facilities		170,000		166,500
Obligations under capital leases		21,000		21,000
Industrial revenue bonds payable to 2015 at 2.4%		1,507		1,594


Total	$	2,497,561	$	2,531,837

The grouping of total debt between fixed and variable-rate as well as between secured and unsecured is summarized below (in thousands):


	March 31,		December 31,
	2012		2011
As to interest rate (including the effects of interest rate contracts):
Fixed-rate debt	$	1,981,494	$	2,014,834
Variable-rate debt		516,067		517,003


Total	$	2,497,561	$	2,531,837


As to collateralization:
Unsecured debt	$	1,513,184	$	1,510,932
Secured debt		984,377		1,020,905


Total	$	2,497,561	$	2,531,837

Effective September 30, 2011, we entered into an amended and restated $500 million unsecured revolving credit facility. The facility expires in September 2015, provides for a one-year extension upon our request and borrowing rates that float at a margin over LIBOR plus a facility fee. The borrowing margin and facility fee are priced off a grid that is tied to our senior unsecured credit ratings, which are currently 125.0 and 25.0 basis points, respectively. The facility also contains a competitive bid feature that will allow us to request bids for up to $250 million. Additionally, an accordion feature allows us to increase the facility amount up to $700 million.

Effective May 2010, we entered into an agreement with a bank for an unsecured and uncommitted overnight facility totaling $99 million that we intend to maintain for cash management purposes. The facility provides for fixed interest rate loans at a 30 day LIBOR rate plus a borrowing margin based on market liquidity.

The following table discloses certain information regarding our unsecured notes payable under our revolving credit facilities (in thousands, except percentages):


	March 31,			December 31,
	2012			2011
Unsecured revolving credit facility:
Balance outstanding	$	170,000		$	145,000
Available balance		326,571			351,571
Letter of credit outstanding under facility		3,429			3,429
Variable interest rate (excluding facility fee)		1.3	%		1.3	%
Unsecured and uncommitted overnight facility:
Balance outstanding	$	-		$	21,500
Variable interest rate		-			1.5	%
Both facilities:
Maximum balance outstanding during the year	$	180,000		$	330,700
Weighted average balance		142,932			151,814
Weighted average interest rate (excluding facility fee)		1.3	%		1.5	%

Related to a development project in Sheridan, Colorado, we have provided a guaranty for the payment of any debt service shortfalls until a coverage rate of 1.4 is met on tax increment revenue bonds issued in connection with the project. The bonds are to be repaid with incremental sales and property taxes and a public improvement fee ("PIF") to be assessed on current and future retail sales and, to the extent necessary, any amounts we may have to provide under a guaranty. The incremental taxes and PIF are to remain intact until the earlier of the date the bond liability has been paid in full or 2040, as extended by the Sheridan Redevelopment Agency ("Agency") in April 2011. Therefore, a debt service guaranty liability equal to the fair value of the amounts funded under the bonds was recorded. For both periods ended at March 31, 2012 and December 31, 2011, we had $74.1 million outstanding for the debt service guaranty liability.

On August 29, 2011, we entered into a $200 million unsecured term loan of which the proceeds were used to pay down amounts outstanding under our revolving credit facility. The initial term of the loan is one year and can be repaid at par after nine months at our option. Borrowing rates under the agreement float at a margin over LIBOR and are priced off a grid that is tied to our senior unsecured credit ratings, which is currently 125.0 basis points.

Various leases and properties, and current and future rentals from those lease and properties, collateralize certain debt. At March 31, 2012 and December 31, 2011, the carrying value of such property aggregated $1.7 billion for both periods.

Scheduled principal payments on our debt (excluding $170.0 million due under our revolving credit facilities, $21.0 million of certain capital leases, $10.3 million fair value of interest rate contracts, $1.6 million net premium/(discount) on debt, $10.0 million of non-cash debt-related items, and $74.1 million debt service guaranty liability) are due during the following years (in thousands):


2012 remaining	$	460,652
2013		315,211
2014		473,968
2015		243,790
2016		231,661
2017		142,096
2018		64,441
2019		153,724
2020		3,746
2021		2,763
Thereafter (1)		118,575

Total	$	2,210,627

(1)

Includes $54.1 million of our 3.95% convertible senior unsecured notes outstanding due 2026, which may be called by us at any time and have future put options in 2016 and 2021.

Our various debt agreements contain restrictive covenants, including minimum interest and fixed charge coverage ratios, minimum unencumbered interest coverage ratios, minimum net worth requirements and maximum total debt levels. We believe we were in compliance with our public debt and revolving credit facility covenants as of March 31, 2012.