XML 113 R92.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share Based and Deferred Compensation (Details Textuals) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2012
Stock Option [Member]
Dec. 31, 2012
Stock Option [Member]
Dec. 31, 2010
Stock Option [Member]
Dec. 31, 2012
Restricted Share Awards [Member]
Age
Dec. 31, 2011
Restricted Share Awards [Member]
Dec. 31, 2010
Restricted Share Awards [Member]
Dec. 31, 2012
Restricted Performance Share Units Plan [Member]
Dec. 31, 2011
Restricted Performance Share Units Plan [Member]
Dec. 31, 2010
Restricted Performance Share Units Plan [Member]
Apr. 02, 2009
Restricted Performance Share Units Plan [Member]
Dec. 31, 2012
Employee Share Purchase Plan [Member]
Dec. 31, 2011
Employee Share Purchase Plan [Member]
Dec. 31, 2010
Employee Share Purchase Plan [Member]
Dec. 31, 2012
Deferred Compensation Plan [Member]
Dec. 31, 2011
Deferred Compensation Plan [Member]
Dec. 31, 2010
Deferred Compensation Plan [Member]
Dec. 31, 2012
Executive Officer [Member]
Restricted Share Awards [Member]
Mar. 01, 2012
Executive Officer [Member]
Restricted Share Awards [Member]
Dec. 31, 2012
Executive Officer [Member]
Restricted Performance Share Units Plan [Member]
Dec. 31, 2011
Executive Officer [Member]
Restricted Performance Share Units Plan [Member]
Mar. 01, 2012
Executive Officer [Member]
Restricted Performance Share Units Plan [Member]
Mar. 02, 2011
Executive Officer [Member]
Restricted Performance Share Units Plan [Member]
Mar. 04, 2010
Executive Officer [Member]
Restricted Performance Share Units Plan [Member]
Share Based and Deferred Compensation (Textuals) [Abstract]                                                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 3,337,549 3,599,672 3,116,611 2,404,567 3,337,549 3,337,549                                          
Unvested options         645,463 645,463                                          
Unrecognized compensation expenses         $ 700,000 $ 700,000   $ 2,700,000                                      
Weighted average period over which options will be recognized           0 years 9 months 20 days   1 year 10 months 10 days                                      
Stock-based compensation expense, capitalized 2,600,000 1,500,000 1,300,000   1,600,000 1,400,000 1,000,000 900,000 700,000 900,000 1,200,000 500,000                              
Recognized compensation expense awards nominal amounts capitalized         500,000 400,000                                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number               597,708 807,291                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               three to seven years from the initial grant date                                      
Award vesting term, minimum 1 year             3 Years                                      
Award vesting term, maximum 10 years             7 Years                                      
Stock-based compensation expense 8,600,000 6,400,000 6,100,000         3,400,000 3,200,000 4,000,000 3,500,000 1,700,000 1,000,000   100,000 100,000 200,000                    
Vesting Period, Minimum                     3 years                                
Aggregate share-based awards awarded to executives                             1,250,000             193,270     260,571 122,119 111,703
Share-based Compensation Arrangement by Share-based Payment Award, Cliff Vesting, Minimum               3 years                                      
Voluntary termination of employment terms               after reaching age 57 and accumulating at least 15 years of service with the Company     after reaching age 57 and accumulating at least 15 years of service with the Company                                
Age limit of voluntary termination of employment               57                                      
Number of employees eligible for qualifying retirement                                         2   2        
Number of employees retired and eligible for qualifying retirement                                         1   1        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 230,294 120,180 12,761                                   10,935   30,610 5,943      
Accumulated Service Period For Voluntary Termination               15 years     15 years                                
Maximum number of shares to be delivered at the end of the measurement period relative to the total shareholder return                     equal a certain percentage (not to exceed 200%) of the participant's base units                                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Delivered                           372,102                          
Maximum percentage of the participant's base units                     200.00%                                
Fair value of awards on the grant date                     4,200,000 2,000,000 1,800,000                            
Share purchases made by employees under ESPP                             85% of the average closing price per share for a specified period                        
Share purchases made by employees under ESPP, Percentage                               85.00%                      
Percentage of plan contribution                               20.00%                      
Amount of participant contribution                               50,000                      
Purchase price of shares purchased under ESPP                             $ 400,000 $ 400,000 $ 500,000                    
Deferred Compensation Arrangement With Individual Increase (Decrease) In Compensation Expense                                   1,300,000   (1,000,000)              
Deferred Compensation Arrangement With Individual Decrease In Compensation Expense                                   1,000,000   1,000,000              
Deferred compensation arrangement with individual increase in compensation expense.                                     100,000                
Number of shares to be issued under deferred compensation plan included in total shares outstanding                                   300,000 300,000                
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 400,000 $ 400,000 $ 300,000