Annual report pursuant to Section 13 and 15(d)

Senior Unsecured Notes (Narrative) (Details)

v2.4.0.6
Senior Unsecured Notes (Narrative) (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2010
Dec. 15, 2010
7.75 % Senior Unsecured Notes Due February 15, 2011 [Member]
Dec. 31, 2011
7.75 % Senior Unsecured Notes Due February 15, 2011 [Member]
Long-Term Debt [Line Items]        
Principal amount of Senior Unsecured Notes     $ 300,000,000  
Interest rate of the Senior Unsecured Notes     7.75%  
Maturity date of the Senior Unsecured Notes       Feb. 15, 2011
Redemption price as a percentage of principal plus accrued and unpaid interest     101.225%  
Unsecured debt redemption price     311,400,000  
Loss from early extinguishment of debt $ 3,752,000 $ 3,752,000