Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans - Components of Share-Based Compensation Included in Consolidated Statements of Income (Detail)

v2.4.0.8
Stock-Based Compensation Plans - Components of Share-Based Compensation Included in Consolidated Statements of Income (Detail) (USD $)
In Thousands, unless otherwise specified
 10 Months Ended 12 Months Ended
Oct. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock based compensation charge (prior to IPO) $ (30,886) $ 30,886    
Share-based compensation expense - Independent contractors   168    
Allocated share-based compensation expense   35,841 7,448 2,851
Restricted stock and SARs (prior to IPO) [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense   4,679 7,448 2,851
Restricted Stock [Member] | Non-employee directors [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense   20    
Restricted Stock Units (RSUs) [Member] | Employee [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense   $ 88