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Intangible and Other Assets (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Estimated future intangible amortization expense  
2013 $ 14,914
2014 12,381
2015 10,483
2016 8,987
2017 7,321
Thereafter 30,907
Total estimated future intangible amortization expense $ 84,993