XML 122 R100.htm IDEA: XBRL DOCUMENT v3.6.0.2
Incentive Plan (Narrative) (Details)
12 Months Ended
May 02, 2007
USD ($)
shares
Dec. 31, 2016
shares
May 01, 2007
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum number of shares granted per employee (in shares) 1,500,000    
Maximum amount of cash paid per employee | $ $ 10,000,000.0    
Number of shares remaining for issuance under the Incentive Plan (in shares)   3,965,682  
2004 Incentive Award Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized and reserved for issuance under the Incentive Plan (in shares)     4,474,102
Amended And Restated 2004 Incentive Award Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized and reserved for issuance under the Incentive Plan (in shares) 9,474,102    
Increase in number of shares reserved for issuance (in shares) 5,000,000    
Two Thousand Fourteen Incentive Award Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Conversion of units to shares ratio   1