4. Debt

The following is a summary of debt, net of discounts (dollar amounts in thousands):


	As of March 31, 2012				As of December 31, 2011
	Balance			Interest Rate	Balance			Interest Rate
Revolving credit facilities	$	—		Variable	$	89,600		Variable
2006 Senior Unsecured Notes		125,000		Various		125,000		Various
2011 Senior Unsecured Notes		450,000		6.875%		450,000		6.875%
2012 Senior Unsecured Notes		200,000		6.375%		—
Exchangeable senior notes:
Principal amount		11,000		9.250%		11,000		9.250%
Unamortized discount		(147	)			(180	)

		10,853				10,820
Term loans		114,372		Various		14,429		6.2000%

	$	900,225			$	689,849

As of March 31, 2012, principal payments due for our debt (which exclude the effects of any discounts recorded) are as follows:


2012	$	174
2013		11,249
2014		266
2015		283
2016		225,299
Thereafter		663,101

Total	$	900,372

To help fund the 2012 acquisitions disclosed in Note 3, on February 17, 2012, we completed a $200 million offering of senior unsecured notes ("2012 Senior Unsecured Notes"), resulting in net proceeds, after underwriting discount, of $196.5 million. These 2012 senior unsecured notes accrue interest at a fixed rate of 6.375% per year and mature on February 15, 2022. The 2012 Senior Unsecured Notes include covenants substantially consistent with our 2011 Senior Unsecured Notes.

In addition, on March 9, 2012, we closed on a $100 million senior unsecured term loan facility ("2012 Term Loan") and exercised the $70 million accordion feature on our revolving credit facility, increasing its capacity from $330 million to $400 million. The 2012 Term Loan facility has an interest rate option of (1) LIBOR plus an initial spread of 2.25% or (2) the higher of the "prime rate", federal funds rate plus 0.5%, or Eurodollar rate plus 1.0%, plus an initial spread of 1.25%. The 2012 Term Loan facility is scheduled to mature on March 9, 2016, but we have the option to extend the facility one year to March 9, 2017.

During the second quarter 2010, we entered into an interest rate swap to fix $65 million of our 2006 Senior Unsecured Notes, which started July 31, 2011 (date on which the interest rate turned variable) through maturity date (or July 2016), at a rate of 5.507%. We also entered into an interest rate swap to fix $60 million of our 2006 Senior Unsecured Notes which started October 31, 2011 (date on which the related interest rate turned variable) through the maturity date (or October 2016) at a rate of 5.675%. At March 31, 2012 and December 31, 2011, the fair value of the interest rate swaps was $11.7 million and $12.2 million, respectively, which is reflected in accounts payable and accrued expenses on the condensed consolidated balance sheets.

We designated our interest rate swaps as cash flow hedges. Accordingly, the effective portion of changes in the fair value of our swaps is recorded as a component of accumulated other comprehensive income/loss on the balance sheet and reclassified into earnings in the same period, or periods, during which the hedged transactions effect earnings, while any ineffective portion is recorded through earnings immediately. We did not have any hedge ineffectiveness in the periods; therefore, there was no income statement effect recorded during the three month periods ended March 31, 2012 or 2011. We do not expect any of the current losses included in accumulated other comprehensive loss to be reclassified into earnings in the next 12 months. At March 31, 2012 and December 31, 2011, we had $6.7 million and $6.3 million, respectively, posted as collateral, which is currently reflected in other assets on our consolidated balance sheets.

Our debt facilities impose certain restrictions on us, including restrictions on our ability to: incur debts; create or incur liens; provide guarantees in respect of obligations of any other entity; make redemptions and repurchases of our capital stock; prepay, redeem or repurchase debt; engage in mergers or consolidations; enter into affiliated transactions; dispose of real estate or other assets; and change our business. In addition, the credit agreements governing our revolving credit facility and 2012 Term Loan limit the amount of dividends we can pay to 120% of normalized adjusted funds from operations, as defined in the agreements, on a rolling four quarter basis starting for the fiscal quarter ending March 31, 2012. Thereafter, a similar dividend restriction exists but the percentage drops each quarter (115% for quarter ending June 30, 2012) until reaching 95% at June 30, 2013. The indenture governing our 2011 and 2012 Senior Unsecured Notes also limits the amount of dividends we can pay based on the sum of 95% of funds from operations, proceeds of equity issuances and certain other net cash proceeds. Finally, our 2011 and 2012 Senior Unsecured Notes require us to maintain total unencumbered assets (as defined in the related indenture) of not less than 150% of our unsecured indebtedness.

In addition to these restrictions, the credit facility and 2012 Term Loan contains customary financial and operating covenants, including covenants relating to our total leverage ratio, fixed charge coverage ratio, mortgage secured leverage ratio, recourse mortgage secured leverage ratio, consolidated adjusted net worth, facility leverage ratio, and borrowing base interest coverage ratio. This facility also contains customary events of default, including among others, nonpayment of principal or interest, material inaccuracy of representations and failure to comply with our covenants. If an event of default occurs and is continuing under the facility, the entire outstanding balance may become immediately due and payable. At March 31, 2012, we were in compliance with all such financial and operating covenants.