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Balance Sheet Account Detail (Amortization) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Balance Sheet Related Disclosures [Abstract]      
Amortization expense $ 300,000 $ 700,000 $ 1,400,000
2014 436,000    
2015 641,000    
2016 953,000    
2017 2,251,000    
2018 3,867,000    
2019 and thereafter 32,240,000    
Total $ 40,388,000