Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies - Accounting for Stock-Based Compensation (Details)

v2.4.0.6
Summary Of Significant Accounting Policies - Accounting for Stock-Based Compensation (Details)
12 Months Ended
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expiration period 10 years
Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 5 years
Stock Options [Member] | Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 3 years
Restricted Stock [Member] | Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 3 years
Restricted Stock [Member] | Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 5 years