Equity and Capital (Tables)

9 Months Ended

Sep. 30, 2014

Equity and Capital [Abstract]

Summary of shares issued under ATM equity programs

The following shares were issued under the ATM equity programs (in thousands, except price per share data):

		Three months ended September 30,			Nine months ended September 30,
		2014	2013		2014	2013
Shares issued		872	30		872	1,899
Weighted average price per share	$	57.35	52.28	$	57.35	53.35
Total proceeds	$	49,995	1,568	$	49,995	101,342
Commissions	$	695	24	$	695	1,520
Issuance costs	$	—	69	$	—	69

Summary of accumulated other comprehensive loss

The following tables present changes in the balances of each component of accumulated other comprehensive loss (in thousands):

	Nine months ended September 30, 2014
	Loss on Settlement of Derivative Instruments			Fair Value of Derivative Instruments		Unrealized Gain on Available-for-Sale Securities	Accumulated Other Comprehensive Income (Loss)
Beginning balance at December 31, 2013	$	(52,542	)	35,138		—	(17,404	)
Net loss on cash flow derivative instruments	—			(28,326	)	—	(28,326	)
Amounts reclassified from other comprehensive income	6,628			338		—	6,966
Unrealized gain on available-for-sale securities	—			—		4,801	4,801
Current period other comprehensive income, net	6,628			(27,988	)	4,801	(16,559	)
Ending balance at September 30, 2014	$	(45,914	)	7,150		4,801	(33,963	)

	Nine months ended September 30, 2013
	Loss on Settlement of Derivative Instruments			Fair Value of Derivative Instruments	Unrealized Gain on Available-for-Sale Securities	Accumulated Other Comprehensive Income (Loss)
Beginning balance at December 31, 2012	$	(61,991	)	4,276	—	(57,715	)
Net gain on cash flow derivative instruments	—			22,187	—	22,187
Amounts reclassified from other comprehensive income	7,086			12	—	7,098
Unrealized gain on available-for-sale securities	—			—	—	—
Current period other comprehensive income, net	7,086			22,199	—	29,285
Ending balance at September 30, 2013	$	(54,905	)	26,475	—	(28,430	)

Schedule of amounts reclassified out of accumulated other comprehensive loss

The following represents amounts reclassified out of accumulated other comprehensive loss into earnings (in thousands):

Details about Accumulated Other Comprehensive Loss Components	Amount Reclassified from Accumulated Other Comprehensive Loss										Affected Line Item in the Statement of Operations
	Three months ended September 30,					Nine months ended September 30,
	2014			2013		2014			2013
Loss on cash flow hedges
Interest rate derivative contracts	$	(2,217	)	(2,366	)	$	(6,966	)	(7,098	)	Interest expense