XML 95 R78.htm IDEA: XBRL DOCUMENT v3.4.0.3
Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Equity [Abstract]      
Common stock authorized 206,000,000 206,000,000  
Common stock par value $ 0.01    
Common stock outstanding 74,988,210 77,893,144  
Preferred stock authorized 2,000,000 2,000,000  
Preferred stock par value $ 0.01 $ 0.01  
Preferred stock issued 0 0  
Shares repurchased 3,000,000 1,200,000 3,700,000
Repurchase of common stock $ 54,949 $ 26,197 $ 75,000