XML 149 R127.htm IDEA: XBRL DOCUMENT v3.3.1.900
Shareholders' Equity - Summary of Outstanding Shares of Common Stock (Detail) - shares
 12 Months Ended 20 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]        
Shares outstanding at beginning of year 43,054,000 43,130,000 42,784,000  
Shares repurchased 0 (464)   (755,310)
Treasury shares issued for:        
Restricted stock awards 206,000 162,000 86,000  
401(k) plan 134,000 116,000 123,000  
Employee stock options exercised 26,000 110,000 137,000  
Shares outstanding at end of year 43,420,000 43,054,000 43,130,000 43,420,000