Annual report pursuant to Section 13 and 15(d)

Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details)

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Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details) (USD $)
 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2012
5.250% Senior Unsecured Notes, Due January 15, 2012 [Member]
Dec. 31, 2011
5.250% Senior Unsecured Notes, Due January 15, 2012 [Member]
Dec. 31, 2012
6.150% Senior Unsecured Notes, Due December 15, 2012 [Member]
May 25, 2012
6.150% Senior Unsecured Notes, Due December 15, 2012 [Member]
Dec. 31, 2011
6.150% Senior Unsecured Notes, Due December 15, 2012 [Member]
Dec. 31, 2012
5.820% Senior Unsecured Notes, Due March 15, 2013 [Member]
May 25, 2012
5.820% Senior Unsecured Notes, Due March 15, 2013 [Member]
Dec. 31, 2011
5.820% Senior Unsecured Notes, Due March 15, 2013 [Member]
Dec. 31, 2012
4.600% Senior Unsecured Notes, Due June 15, 2013 [Member]
Dec. 31, 2011
4.600% Senior Unsecured Notes, Due June 15, 2013 [Member]
Dec. 31, 2012
5.125% Senior Unsecured Notes, Due February 15, 2014 [Member]
Dec. 31, 2011
5.125% Senior Unsecured Notes, Due February 15, 2014 [Member]
Dec. 31, 2012
5.125% Senior Unsecured Notes, Due January 15, 2015 [Member]
Dec. 31, 2011
5.125% Senior Unsecured Notes, Due January 15, 2015 [Member]
Dec. 31, 2012
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Dec. 31, 2011
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Dec. 31, 2012
2.500% Senior Unsecured Notes Due December 15, 2017 [Member]
Dec. 31, 2012
7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]
Dec. 31, 2011
7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]
Dec. 31, 2012
4.500% Senior Unsecured Notes Due April 18, 2022 [Member]
Long-Term Debt [Line Items]                                                  
Senior Unsecured Notes $ 1,446,894,000   $ 1,446,894,000   $ 1,119,267,000   $ 99,988,000 [1]     $ 94,438,000 [2]     $ 25,972,000 $ 99,987,000 $ 99,958,000 $ 200,270,000 $ 200,509,000 $ 149,810,000 $ 149,717,000 $ 200,237,000 $ 200,313,000 $ 248,560,000 $ 248,585,000 $ 248,372,000 $ 299,445,000
Effective Rate           5.457% [1],[3]   6.894% [2],[3]     6.448% [3]     4.742% [3]   5.11% [3]   5.297% [3]   5.806% [3]   2.803% [3] 8.017% [3]   4.612% [3]
Interest rate of senior unsecured notes           5.25% [4]   6.15% [1]     5.82% [2]     4.60%   5.125%   5.125%   5.80%   2.50% 7.75%   4.50%
Maturity date of the Senior Unsecured Notes           Jan. 15, 2012 [4]   Dec. 15, 2012 [1]     Mar. 15, 2013 [2]     Jun. 15, 2013   Feb. 15, 2014   Jan. 15, 2015   Jan. 15, 2016   Dec. 15, 2017 Aug. 15, 2019   Apr. 18, 2022
Principal amount of Senior Unsecured Notes redeemed                 94,900,000     26,100,000                          
Redemption price as percentage of principal                 103.19%     103.87%                          
Redemption price of Senior Unsecured Notes                 100,500,000     27,400,000                          
Loss from early extinguishment of debt $ 545,000 $ 4,415,000 $ 4,960,000 $ 3,752,000       $ 3,300,000     $ 1,100,000                            
[1] On May 25, 2012, the Company redeemed $94.9 million principal amount of its 6.15 percent senior unsecured notes due December 15, 2012 (the “2002 Notes”). The redemption price, including a make-whole premium, was 103.19 percent of the principal amount of the 2002 Notes, plus accrued and unpaid interest up to the redemption date. The Company funded the redemption price, including accrued and unpaid interest, of approximately $100.5 million from borrowing on its unsecured revolving credit facility, as well as cash on hand. In connection with the redemption, the Company recorded approximately $3.3 million as a loss from early extinguishment of debt (including the write-off of unamortized deferred financing costs).
[2] On May 25, 2012, the Company redeemed $26.1 million principal amount of its 5.82 percent senior unsecured notes due March 15, 2013 (the “2003 Notes”). The redemption price, including a make-whole premium, was 103.87 percent of the principal amount of the 2003 Notes, plus accrued and unpaid interest up to the redemption date. The Company funded the redemption price, including accrued and unpaid interest, of approximately $27.4 million from borrowing on its unsecured revolving credit facility, as well as cash on hand. In connection with the redemption, the Company recorded approximately $1.1 million as a loss from early extinguishment of debt (including the write-off of unamortized deferred financing costs).
[3] Includes the cost of terminated treasury lock agreements (if any), offering and other transaction costs and the discount/premium on the notes, as applicable.
[4] These notes were paid at maturity, primarily from borrowing on the Company’s unsecured revolving credit facility.