Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation PlansPlans (Details)

v2.4.0.6
Stock-Based Compensation PlansPlans (Details) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Contract Costs [Member]
Dec. 31, 2011
Contract Costs [Member]
Dec. 31, 2010
Contract Costs [Member]
Dec. 31, 2012
Non-employee Director [Member]
Dec. 31, 2011
Non-employee Director [Member]
Dec. 31, 2010
Non-employee Director [Member]
Dec. 31, 2012
Employee [Member]
Dec. 31, 2011
Employee [Member]
Dec. 31, 2010
Employee [Member]
Mar. 02, 2012
Employee [Member]
Dec. 31, 2012
2006 Restricted Stock Plan [Member]
Non-employee Director [Member]
Dec. 31, 2011
2006 Restricted Stock Plan [Member]
Non-employee Director [Member]
Jan. 03, 2012
2006 Restricted Stock Plan [Member]
Non-employee Director [Member]
Jan. 02, 2011
2006 Restricted Stock Plan [Member]
Non-employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Shares authorized (in shares) 250,000                                
Restricted stock awarded (in shares)                   29,379       10,800 9,800    
Grant date fair value (in dollars per share)                         $ 23.86     $ 25.22 $ 33.16
Vesting period 3 years                                
Stock-based compensation cost, net $ 744,000 $ 1,033,000 $ 1,705,000 $ 662,000 $ 881,000 $ 1,240,000                      
Tax withholding associated with awards issued 332,000 393,000 307,000                            
Compensation expense not yet recognized 295,000                                
Weighted average amortization period of compensation not yet recognized 1 year 3 months 18 days                                
Amount reclassified from stockholders' equity to accrued expenses     1,100,000                            
Stock-based compensation expense 922,000 1,229,000 1,954,000 1,076,000 1,427,000 2,012,000 272,000 347,000 298,000 650,000 882,000 1,656,000          
Income tax benefit recognized for stock-based compensation (414,000) (546,000) (772,000)                            
Total stock-based compensation expense, net of income tax $ 744,000 $ 1,033,000 $ 1,705,000 $ 662,000 $ 881,000 $ 1,240,000