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Commitments and Contingencies (Details) (USD $)
 3 Months Ended 12 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2013
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2010
Sep. 30, 2009
Dec. 31, 2003
Commitments and Contingencies Disclosure [Abstract]                
Disclosure threshold for future non-cancelable purchase and service obligations     greater than $100,000 and one year          
Non-cancelable purchase and service obligations [Abstract]                
2014     $ 6,448,000          
2015     7,164,000          
2016     5,267,000          
2017     1,758,000          
2018     1,770,000          
Thereafter     4,344,000          
Total obligations     26,751,000          
Texas Sales and Use Tax Assessment [Abstract]                
Texas Sales and Use Tax Assessment     933,000   782,000      
Massachusetts Tax Assessment [Abstract]                
Assessment related to alleged underpayment of corporate income taxes         2,500,000   470,000  
Lumbermens Mutual Casualty Company [Abstract]                
Outstanding claims minimum     1,000,000          
Outstanding claims maximum     2,000,000          
Pennsylvania Sales Taxes [Abstract]                
Accrual of sales taxes       2,500,000        
Refund claim for Pennsylvania sales taxes paid in error           2,900,000    
Recorded amount of Pennsylvania refund   2,900,000            
Collection of Pennsylvania refund claim 2,900,000              
California Unemployment Taxes [Abstract]                
Unemployment tax reserve account assessment relating to California employees, including penalties and interest         8,100,000     5,600,000
Actual unemployment tax settlement relating to California employees, including penalties and interest       $ 3,100,000