Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation (Summary Of The Changes In The Number Of Outstanding Phantom Stock Shares) (Details)

v2.4.0.6
Share-Based Compensation (Summary Of The Changes In The Number Of Outstanding Phantom Stock Shares) (Details)
12 Months Ended
Dec. 31, 2011
Phantom Stock Plan [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Balance of shares outstanding at December 31, 2010 253,802
Granted 41,028
Settled (13,381)
Balance of shares outstanding at December 31, 2011 281,449
Director Phantom Stock Plan [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Balance of shares outstanding at December 31, 2010 25,239
Granted 8,250
Settled 0
Balance of shares outstanding at December 31, 2011 33,489