XML 112 R99.htm IDEA: XBRL DOCUMENT v3.3.1.900
Equity (Stock Repurchase Program) (Details) - USD ($)
 2 Months Ended 12 Months Ended
Feb. 24, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Feb. 15, 2016
Dec. 21, 2015
Sep. 21, 2015
Aug. 13, 2015
Class of Stock [Line Items]                
Common stock exchange rate for CSE underlying HPU, Shares               0.7
Stock Repurchase Program                
Repurchase of common stock, authorized amount           $ 50,000,000.0 $ 50,000,000  
Treasury stock, shares, acquired     0          
Stock repurchased and retired during period, shares   5,700,000            
Common stock value acquired including acquisition costs   $ 70,300,000            
Repurchase of stock   $ 69,511,000 $ 0 $ 20,985,000        
Average cost per share   $ 12.25            
Available repurchase of common stock, authorized amount   $ 48,700,000            
Subsequent Event                
Stock Repurchase Program                
Repurchase of common stock, authorized amount         $ 50,000,000.0      
Stock repurchased and retired during period, shares 5,200,000              
Repurchase of stock $ 52,000,000              
Average cost per share $ 10.10