Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details 2)

v2.4.0.6
Fair Value Measurements (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Carrying Value $ 629,385  
9.0% Notes [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value 231,525 221,025
Long-term Debt, Carrying Value 208,923 208,769
7.0% Notes [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value 222,000   
Long-term Debt, Carrying Value 198,282   
5.0 % Convertible Notes [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value    205,448
Long-term Debt, Carrying Value    137,333
Mortgage Notes [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value 148,244 119,310
Long-term Debt, Carrying Value 137,791 116,584
Assumed Notes [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value 10,592 13,260
Long-term Debt, Carrying Value 11,289 14,438
Other [Member]
   
Fair value and carrying value of fixed rate long-term debt    
Long-term Debt, Fair Value 4,971 5,150
Long-term Debt, Carrying Value $ 5,341 $ 5,555