Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans - Changes in Company's Common Stock Price During Reporting Period (Detail)

v3.3.1.900
Stock-Based Compensation Plans - Changes in Company's Common Stock Price During Reporting Period (Detail) - Stock Based Compensation Expense [Member] - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock price at beginning of period $ 33.25 $ 14.90 $ 0.00
Common stock price at end of period 29.14 33.25 14.90
(Decrease) increase in stock price $ (4.11) $ 18.35 $ 0.00