XML 73 R49.htm IDEA: XBRL DOCUMENT v3.3.0.814
Preferred and Common Stockholder's Equity - Additional Information (Detail) - USD ($)
Sep. 30, 2015
Jun. 30, 2015
Feb. 28, 2015
Sep. 30, 2014
Jun. 30, 2014
Class of Stock [Line Items]          
Preferred stock, shares authorized 5,000,000        
Preferred stock, par value $ 0.01        
Preferred stock, shares outstanding 0        
Common stock, shares authorized 150,000,000        
Common stock, par value $ 0.01        
Common stock, shares issued 69,400,000 68,900,000   73,000,000 73,500,000
Common stock, shares outstanding 69,400,000 68,900,000   73,000,000 73,500,000
Share repurchase program, remaining authorized repurchase amount $ 116,900,000        
Seventh Share Repurchase Program          
Class of Stock [Line Items]          
Share repurchase program, authorized amount     $ 200,000,000