XML 21 R67.htm IDEA: XBRL DOCUMENT v2.4.0.8
Long-Term Incentive Plan (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense recognized $ 13,993 $ 9,730 $ 6,656
Omnibus Stock Incentive Plans, 2007 [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Compensation expense recognized $ 6,400 $ 4,200 $ 1,900