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Stock-Based Compensation and Other Plans (Details) (USD $)
12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
All grants excluding those to Company's CEO outside of Incentive Plan
Dec. 31, 2013
Stock options
Dec. 31, 2012
Stock options
Dec. 31, 2011
Stock options
Dec. 31, 2010
Stock options
Jun. 30, 2011
Stock options
CEO
Dec. 31, 2013
Stock options
All grants excluding those to Company's CEO outside of Incentive Plan
Dec. 31, 2013
Restricted Stock
Dec. 31, 2012
Restricted Stock
Dec. 31, 2011
Restricted Stock
Dec. 31, 2010
Restricted Stock
Dec. 31, 2013
Restricted stock units
Dec. 31, 2012
Restricted stock units
Dec. 31, 2011
Restricted stock units
Dec. 31, 2010
Restricted stock units
Dec. 31, 2013
Restricted stock units
All grants excluding those to Company's CEO outside of Incentive Plan
Jun. 16, 2009
Incentive Plan
Jun. 05, 2008
Incentive Plan
Dec. 31, 2013
Incentive Plan
Jun. 16, 2009
2003 Directors Plan
Stock-Based Compensation Plans                                              
Additional shares authorized                                       250,000 533,750    
Percentage of number of shares of common stock issued and outstanding immediately prior to the grant used to calculate the maximum award                                           25.00%  
Number of shares used to calculate the maximum award                                           783,750  
Number of shares available for issuance before additional shares were approved                                             5,000
Shares authorized for issuance 2,432,706                                           100,000
Share awards used:                                              
Shares granted and outstanding         329,523 455,706 455,366 304,970   296,189                          
Shares granted and unvested                     14,834 337,587 305,687 570,525 3,471 197,962 399,530 309,567 3,471        
Shares granted and vested                             25,658                
Total share awards used       340,152                                      
Shares available for future awards       2,092,554                                      
Options granted (in shares)           33,333 218,684   33,334                            
Stock-based compensation expense (in dollars) $ 5,592,000 $ 6,800,000 $ 15,074,000                                        
Tax benefit recognized related to stock-based compensation expense (in dollars) 0 0 6,400,000                                        
Actual tax benefit realized for the tax deductions for share-based compensation (in dollars) 0 0 8,100,000                                        
Total compensation expense related to non-vested awards not yet recognized (in dollars)                     $ 300,000                        
Remaining weighted average vesting period for recognition of compensation expense                     10 months 24 days                        
Vesting period         3 years                                    
Expiration term         6 years