Annual report pursuant to Section 13 and 15(d)

EQUITY AND EARNINGS PER SHARE - Outstanding Options Summary (Details 1)

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EQUITY AND EARNINGS PER SHARE - Outstanding Options Summary (Details 1) - shares
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 5,421,561 5,500,599
Issued Prior to 2011    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 144,661 199,993
Issued in 2011 and thereafter    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 5,276,900 5,300,606
Manager    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 5,125,482 4,991,752
Manager | Issued Prior to 2011    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 115,239 157,791
Manager | Issued in 2011 and thereafter    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 5,010,243 4,833,961
Employees of Fortress    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 296,079 508,514
Employees of Fortress | Issued Prior to 2011    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 29,422 41,869
Employees of Fortress | Issued in 2011 and thereafter    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 266,657 466,645
Directors    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 0 333
Directors | Issued Prior to 2011    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 0 333
Directors | Issued in 2011 and thereafter    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock Options outstanding (in shares) 0 0