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Intangible Assets (Details 1) (USD $) In Thousands | 6 Months Ended
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Jun. 30, 2011
Assets, Total [Member] |
Annual amortization of intangible assets and liabilities |
2011 (six months remaining) | $ 14,510
2012 | 20,705
2013 | 12,452
2014 | 9,481
2015 | 6,717
Thereafter | 14,536
Total | 78,401
Liabilities, Total [Member] |
Annual amortization of intangible assets and liabilities |
2011 (six months remaining) | 3,581
2012 | 6,447
2013 | 5,902
2014 | 4,334
2015 | 2,158
Thereafter | 3,134
Total | $ 25,556

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