Debt Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The following tables summarize the Company’s unsecured note balances and certain interest rate and maturity date information as of and for the years ended December 31, 2013 and 2012, respectively:

December 31, 2013  (Amounts are in thousands)	Net Principal Balance		Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
Fixed Rate Public/Private Notes (1)	$	4,727,088	3.00% - 7.57%	5.55%	2014 - 2026
Floating Rate Public/Private Notes (1)	750,000		(1) (2)	1.58%	2015
Totals	$	5,477,088

December 31, 2012 (Amounts are in thousands)	Net Principal Balance		Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
Fixed Rate Public/Private Notes (1)	$	4,329,352	4.625% - 7.57%	5.70%	2013 - 2026
Floating Rate Public/Private Notes (1)	301,523		(1)	1.83%	2013
Totals	$	4,630,875

(1) At December 31, 2012, $300.0 million in fair value interest rate swaps converts a portion of the $400.0 million face value 5.200% notes due April 1, 2013 to a floating interest rate. On April 1, 2013, the Company paid off the $400.0 million outstanding of its 5.200%  public notes at maturity and the related fair value interest rate swaps matured.

(2) Includes the Company's senior unsecured $750.0 million delayed draw term loan facility that matures on January 11, 2015 and is subject to a one-year extension option exercisable by the Company. The interest rate on advances under the term loan facility will generally be LIBOR plus a spread (currently 1.20%), which is dependent on the credit rating of the Company's long-term debt.

Aggregate payments of principal on unsecured notes payable

The following table provides a summary of the aggregate payments of principal on all debt for each of the next five years and thereafter (amounts in thousands):

Year		Total (1)
2014		$	561,084
2015		1,170,448
2016		1,193,251
2017		1,347,191
2018	—	297,016
Thereafter		6,209,697
Net Unamortized (Discount)		(12,433		)
Total		$	10,766,254

(1) Premiums and discounts are amortized over the life of the debt.