Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail)

v3.6.0.2
STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Long Term Incentive Performance Award        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected dividend yield 129.08%   65.86% 109.84%
Risk-free interest rate 16.46%   15.53% 17.02%
Expected volatility 1.00%   0.89% 0.65%
Weighted-average fair value of options granted $ 136.18   $ 63.64 $ 106.52
Nonqualified Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected dividend yield   2.95% 2.63% 2.56%
Risk-free interest rate   1.62% 2.07% 2.40%
Expected life in years   7 years 6 months 7 years 6 months 7 years 6 months
Expected volatility   22.40% 20.61% 24.26%
Weighted-average fair value of options granted   $ 16.46 $ 18.07 $ 20.48