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           Supplemental Disclosure of Cash Flow Information (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2013 
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           Mar. 31, 2012 
         | 
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| Cash paid during the period for: | ||
| Interest, net of interest capitalized | $ 6,349 | $ 7,863 | 
| Income taxes | 2 | 2 | 
| Non-cash operating activities: | ||
| Real estate not owned | $ 0 | $ 1,025 | 
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- Definition 
          The non-cash impact of consolidation of purchase and option contracts. No definition available. 
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- Definition 
          The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of cash paid for interest during the period net of cash paid for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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