Indebtedness (Tables)

12 Months Ended

Dec. 31, 2012

Indebtedness

Schedule of additional outstanding debt

					December 31, 2012				December 31, 2011
Unsecured Debt	Coupon		Maturity		Face Amount		Unamortized Discount		Face Amount		Unamortized Discount
Senior notes		8.625%		2012	$	—	$	—	$	225,000	$	—
Senior notes		4.300%		2016		250,000		1,620		250,000		2,154
Senior notes		6.750%		2020		200,000		1,563		200,000		1,777
Senior notes		6.750%		2021		300,000		4,764		300,000		5,299
Senior notes		5.625%		2042		350,000		—		—		—
Total unsecured debt					$	1,100,000	$	7,947	$	975,000	$	9,230

Schedule of secured and other debt

	Principal Balance as of December 31,												Net Book Value of Collateral
									Number of Properties as Collateral		Initial Cost of Collateral
Secured and Other Debt	2012(1)		2011(1)		Interest Rate		Maturity						2012		2011
Mortgage(2)	$	—	$	12,400		6.03%		Mar 12		—	$	17,158	$	—	$	17,076
Mortgage(2)		—		2,356		6.73%		Jun 12		—		4,450		—		3,696
Mortgages(2)		—		30,580		6.97%		Jul 12		—		70,114		—		61,542
Mortgage(2)(3)		—		3,177		6.07%		Sep 12		—		22,143		—		—
Mortgage(2)		—		4,224		6.50%		Jan 13		—		7,560		—		7,406
Mortgages		10,565		10,920		6.11%		Dec 13		4		17,034		14,883		14,814
Mortgages		13,759		14,009		6.91%		Dec 13		2		36,359		33,057		33,702
Mortgages		36,906		37,619		5.83%		Jun 14		2		79,000		78,594		79,108
Mortgage		30,944		—		6.015%		Mar 15		1		99,000		98,346		—
Mortgage(3)		5,121		5,215		5.65%		Jun 15		1		—		21,435		21,838
Mortgage		11,612		11,747		6.365%		Jul 15		1		14,849		14,432		14,697
Mortgages		13,051		13,310		5.66%		Jul 15		3		26,606		25,868		26,377
Mortgage		2,878		2,946		5.88%		Jul 15		1		15,397		14,774		15,173
Mortgage		6,792		—		5.81%		Oct 15		1		9,650		9,665		—
Mortgage		4,596		4,684		5.81%		Oct 15		1		8,600		8,391		8,532
Mortgages		52,000		—		5.64%		Jan 16		1		70,495		66,123		—
Mortgage		6,476		6,581		5.97%		Apr 16		1		10,272		10,051		10,194
Mortgages		90,607		93,133		5.924%		Nov 16		2		157,500		154,691		157,640
Mortgage		12,537		12,695		6.25%		Nov 16		1		22,102		21,968		21,984
Mortgage		5,810		—		5.86%		Mar 17		1		11,280		11,562		—
Mortgages		46,753		47,688		6.54%		May 17		8		62,500		56,341		57,873
Mortgage		11,419		—		6.15%		Aug 17		1		16,400		15,507		—
Mortgage-		9,641		—		6.73%		Apr 18		1		15,100		11,526		—
Mortgage(4)		296,437		300,669		6.71%		Sep 19		17		617,161		260,274		505,214
Mortgage(4)		—		200,078		6.39%		Sep 19		—		—		—		—
Mortgage(5)		3,270		3,515		7.31%		Jan 22		1		18,827		16,839		17,243
Mortgage(5)		1,608		1,725		7.85%		Jan 22		—		—		—		—
Mortgage		3,534		3,619		6.25%		Feb 33		1		5,200		4,695		4,807
Mortgage		9,492		9,623		5.95%		Sep 38		2		11,425		9,295		19,589
Mortgage		4,747		—		4.375%		Sep 43		1		8,059		7,768		—
Bonds		14,700		14,700		5.875%		Dec 27		1		34,307		26,559		27,503
Capital leases		13,792		14,211		7.70%		Apr 26		2		28,601		15,602		16,027
Total secured	$	719,047	$	861,424						58	$	1,517,149	$	1,008,246	$	1,142,035

(1)

The principal balances are the amounts stated in the contracts. In accordance with GAAP, our carrying values and recorded interest expense may be different because of market conditions at the time we assumed certain of these debts. As of December 31, 2012 and 2011, the unamortized net premiums on certain of these mortgages were $5,430 and $191, respectively.

(2)

In 2012 we repaid this debt.

(3)

These two mortgages are collateralized by one property acquired in June 2011. One of these mortgages was repaid in 2012.

(4)

These two mortgages were closed in August 2009 and originally collateralized by 28 properties. A part of this loan requires interest at a fixed rate of 6.71% and a part of the loan required interest at a variable rate. In August 2012, we repaid the variable rate portion of the mortgage and 11 properties were released from the collateral.

(5)

These two mortgages are collateralized by one MOB property acquired in July 2008.

Schedule of required principal payments on outstanding debt

2013	$	36,109
2014		48,022
2015		272,356
2016		410,136
2017		65,382
Thereafter		1,177,042